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smsc EMC1053 datasheet revision 0.58 (09-26-05) datasheet product features EMC1053 1c triple temperature sensor with resistance error correction and hotter of two zones general description the EMC1053 is a system management bus (smbus) temperature sensor that monitors up to three temperature zones, two remote and one local, for pc and embedded environments. the EMC1053 extended features include resistance error correction and ideality factor configuration to eliminate major sources of temperature measurement error. 1 monitoring both diodes of a dual-core cpu is simplified with the hotter of two zones feature. the external and internal measurement ranges support two data ranges (and formats), -64c to +127c and -64c to +191c. selectable conversion rates and standby mode support low-power operation. applications desktop and notebook computers hardware management features resistance e rror correction ideality factor configuration reports hotter of two zones with dual-core cpu accepts 2200pf cap for noise suppression 2 remote thermal zones ? 1 c accuracy (40 c to 80 c) ? 0.125 c resolution internal thermal zone ? 3 c accuracy (0 c to 85 c) ? 0.125 c resolution low power; 3.0v to 3.6v supply programmable conversion rate smbus 2.0 compliant simplified block diagram 1.patents pending. EMC1053 local temp diode switching current smclk local temp register configuration register status register smbus interface remote temp register 1 remote temp register 2 smdata 11-bit delta-sigma adc analog mux and anti-alias filter dp1 dn1 dp2 dn2 digital mux and byte interlock
order numbers EMC1053-aczl-tr for 8 pin, msop package (address - 1001100b) (green, lead-free) reel size is 4,000 pieces. evaluation board available upon request. (evb-EMC1053) 80 arkay drive hauppauge, ny 11788 (631) 435-6000 fax (631) 273-3123 copyright ? 2005 smsc or its subsidiaries. all rights reserved. circuit diagrams and other information relating to smsc products are included as a means of illustrating typical applications. consequently, complete information sufficient for construction purposes is not necessarily given. although the information has been checked a nd is believed to be accurate, no responsibility is assumed for inaccuracies. smsc rese rves the right to make changes to specifications and product descriptions at any time without notice. contact your local smsc sales office to obtain the latest specifications before placing your product order . the provision of this information does not convey to the purchaser of the described se miconductor devices any licenses under any patent rights or oth er intellectual property rights of smsc or others. all sales are expressly conditional on your agreement to the terms and conditions of the mos t recently dated version of smsc's standard terms of sale agreement dated before the date of your order (the "terms of sale agreement"). the pro duct may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifica tions. anomaly sheets are available upon request. smsc products are not designed, intended, authorized or warranted for use in any life suppor t or other application where product failure could cause or contribute to personal injury or severe property damage. any and all such uses without prior written approval of an officer of smsc and further testing and/or modification will be fully at the risk of the customer. copies of thi s document or other smsc literature, as well as the terms of sale agreement, may be obtained by visiting smsc?s website at http://www.smsc.com. sms c is a registered trademark of standard microsystems corporation (?smsc?). product names and company names are the trademarks of their respective holders. smsc disclaims and excludes any and all warranties, including without limitation any and all implied warranties of merchantability, fitness for a particular purpose, title, and against infringement and the like, and any and all warranties arising from any course of dealing or usage of trade. in no event shall smsc be liable for any direct, incidental, indirect, special, punitive, or consequential damages; or for lost data, profits, savings or revenues of any kind; regardless of the form of action, whether based on contract; tort; negligence of smsc or others; strict liability; breach of warranty; or otherwise; whether or not any remedy of buyer is held to have failed of its essential purpose, and whether or not smsc has been advised of the possibility of such damages. 1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 2 smsc EMC1053 datasheet
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 3 revision 0.58 (09-26-05) datasheet chapter 1 pin function figure 1.1 pin diagram table 1.1 pin description pin pin no. description dp1 1 positive analog input for remote temperature diode 1 dn1 2 negative analog input for remote temperature diode 1 dp2 3 positive analog input for remote temperature diode 2 dn2 4 negative analog input for remote temperature diode 2 gnd 5 ground vdd 6 supply voltage smdata 7 system management bus data input/output, open drain output smclk 8 system management bus clock input EMC1053 top view 8 7 6 5 1 2 3 4 dp1 dn1 dp2 dn2 smclk smdata vdd gnd
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 4 smsc EMC1053 datasheet chapter 2 electrical specifications 2.1 absolute maximum ratings note: stresses above those listed could cause damage to the device. this is a stress rating only and functional operation of the device at any other condition above those indicated in the operation sections of this specification is not implied. when powering this device from laboratory or system power supplie s, it is important that the absolute maximum ratings not be exceeded or device failure can result. some power supplies exhibit voltage spikes on their outputs when the ac power is switched on or off. in addition, voltage transients on the ac power line may appear on the dc output. if this po ssibility exists, it is suggested that a clamp circuit be used. 2.2 electrical specifications table 2.1 absolute maximum ratings description rating unit supply voltage v dd -0.3 to 5.0 v voltage on smdata and smclk pins -0.3 to 5.5 v voltage on any other pin -0.3 to vdd+0.3 v operating temperature range 0 to 85 c storage temperature range -55 to 150 c lead temperature range refer to jedec spec. j-std-020 package thermal characteristics for msop-8 power dissipation tbd thermal resistance (at 0 air flow) 135.9 c/w esd rating, all pins human body model 2000 v table 2.2 electrical characteristics v dd =3.0v to 3.6v, t a = 0 c to +85 c, typical values at t a = 27 c unless otherwise noted parameter symbol min typ max units conditions dc power supply voltage v dd 3.0 3.3 3.6 v average operating current i dd 340 375 a 4 conversions/s see table 4.6 . i stby 24 a standby mode internal temperature monitor temperature accuracy 1 3 c0 c t a 85 c temperature resolution 0.125 c
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 5 revision 0.58 (09-26-05) datasheet note 2.1 300ns rise time max is required for 400khz bus operation. for lower clock frequencies, the maximum rise time is (0.1/f smb )+50ns external temperature monitor temperature accuracy remote diode 40 c to 80 c remote diode 0 c to 125 c 1 3 c c 15 c t a 70 c 0 c t a 85 c temperature resolution 0.125 c capacitive load c load 2.5 nf connected across remote diode. voltage tolerance voltage at pin ( smdata,smclk) v tol -0.3 5.5 v smbus interface (smdata,smclk) input high level v ih 2.0 v input low level v il 0.8 v input high/low current i ih /i il -1 1 a hysteresis 500 mv input capacitance 5 pf output low sink current 6 ma smdata = 0.6v smbus timing clock frequency f smb 10 400 khz spike suppression 50 ns bus free time start to stop t buf 1.3 s hold time start t hd:sta 0.6 s setup time start t su:sta 0.6 s setup time stop t su:sto 0.6 s data hold time t hd:dat 0.3 s data setup time t su:dat 100 ns clock low period t low 1.3 s clock high period t high 0.6 s clock/data fall time t f * 300 ns *min = 20+0.1c b ns clock/data rise time t r * 300 note 2.1 ns *min = 20+0.1c b ns capacitive load (each bus line) c b 0.6 400 pf table 2.2 electrical characteristics (continued) v dd =3.0v to 3.6v, t a = 0 c to +85 c, typical values at t a = 27 c unless otherwise noted parameter symbol min typ max units conditions
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 6 smsc EMC1053 datasheet 2.3 system management bus interface protocol a host controller, such as an smsc i/o controlle r, communicates with the EMC1053 via the two wire serial interface named smbus. th e smbus interface is used to read and write registers in the EMC1053, which is a slave-only device. a detailed timing diagram is shown in figure 2.1 . figure 2.1 system management bus timing diagram the EMC1053 implements a subset of the smbus s pecification and supports write byte, read byte, send byte, and receive byte protocols as shown. in the tables that describe the protocol, the ?gray? columns indicate that the slave is driving the bus. all of the below protocols use the following convention: 2.3.1 write byte the write byte is used to write one byte of data to the registers as shown in ta b l e 2 . 3 . 2.3.2 read byte the read byte protocol is used to read one byte of data from the registers as shown in table 2.4 . 2.3.3 send byte the send byte protocol is used to set the internal address register to the correct address as shown in table 2.5 . the send byte can be followed by the receive byte protocol described in table 2.6 to data sent to device data sent to the host # of bits sent # of bits sent table 2.3 write byte protocol start slave address wr ack command ack data ack stop 171 18 18 11 table 2.4 read byte protocol start slave address wr ack command ack start slave address rd ack data nack stop 171 18 11 7 1 1 811 smdata smclk t low t r t high t f t buf t hd:sta p s s - start condition p - stop condition t hd:dat t su:dat t su:sta t hd:sta p t su:sto s
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 7 revision 0.58 (09-26-05) datasheet read data from the register. the send byte protocol ca nnot be used to write data - if data is to be written to a register then the write byte protocol must be used as described in section 2.3.1 . 2.3.4 receive byte the receive byte protocol is used to read data from a register when the internal register address pointer is known to be at the right location (e.g. se t via send byte). this can be used for consecutive reads of the same register as shown in table 2.6 . 2.3.5 smbus timing diagram the timing for the smbus is shown in figure 2.1 . 2.4 smbus addresses the EMC1053 may be ordered with one of the 7-bit slave addresses as shown in order numbers . attempting to communicate with t he EMC1053 smbus interface with an invalid slave address or invalid protocol results in no response from the device an d does not affect its register contents. the EMC1053 supports stretching of the smclk signal by ot her devices on the smbus but will not perform this operation itself. 2.5 smbus timeout the EMC1053 includes an smbus timeout feature. fo llowing a 25 ms period of inactivity on the smbus, the device will timeout an d reset the smbus interface. table 2.5 send byte protocol start slave addr wr ack reg. addr ack stop 1711811 table 2.6 receive byte protocol start slave addr rd ack reg. data nack stop 1711811
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 8 smsc EMC1053 datasheet chapter 3 product description the EMC1053 is an smbus sensor that is capable of monitoring three temperature zones for use in a personal computer or embedded environment. the part may be used as a companion to one of smsc?s broad line of sio host circuits, or other devices capable of performing the smbus host function. a typical system overview is shown in figure 3.1 . 3.1 power modes the EMC1053 has two power modes as defined here: run mode - in this mode, the temperature monitors are active and converting at various conversion rates. the average power dissipation will depend on the conversion rate. when the EMC1053 is not actively converting a channel, it goes into a lo wer power wait state where only the oscillator is running. standby mode- in this mode, the EMC1053 is put into a low power state drawing a maximum current of 3ua. the smbus is still operating in standby and a one-shot command may be given which forces the part to run mode temporarily for 1 full set of temperature conversions. the EMC1053 returns to standby after the one shot conversion is completed. 3.2 one shot du ring standby mode the EMC1053 supports a one-shot command when it is in standby mode. writing to the one-shot register will cause the device to power up and perf orm 1 full set of temperature conversions according to the selected conversion rate, and then return to the standby mode. 3.3 operation during run mode when the device is active, there are two modes of operation available. normal mode - in this mode, the EMC1053 continuously samples and updates all of its temperature channels. in this mode of operation, each da ta channel is measured and loaded into the appropriate data registers normally. hotter of two mode - in this mode, the EMC1053 cont inuously samples and then compares the two remote zones. the hotter of the two remote zones is loaded into the external diode 2 data registers. in addition, the hotter bit in the status register is set or cleared to indicate which external diode zone was hotter. if the two external zones are exactly equal to each other, then the figure 3.1 EMC1053 system overview EMC1053 host smbus interface smbus internal diode dp1 dn1 dp2 dn2
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 9 revision 0.58 (09-26-05) datasheet hotter bit is cleared (set to ?0?), and the results of the two remote zones are stored in their respective registers. 3.3.1 conversion rates the EMC1053 may be configured for different c onversion rates based on the system requirements. the available rates are 1 full set of conversions per second to 16 full sets of conversions per second. the available conversion rates are shown in ta b l e 4 . 6 . 3.3.2 dynamic averaging the EMC1053 temperature channels support a new f eature that measures the external diode channels for an extended period of time based on the selected conversion rate. when dynamic averaging is enabled, the device will automatically adjust the sampling and measurement time for both external diode channels. this allows the device to average 2x or 4x longer than the normal 11 bit operation while still maintaining the selected conversion ra te. the benefits of dynamic averaging are improved noise rejection due to the longer sampling and measurement time as well as reduced jitter on the measurement value for the external temperatures. the dynamic averaging applies when a one-shot command is issued. the device will perform the desired number of averages during the one-shot operation according to the selected conversion rate. 3.4 temperature monitors in general, thermal diode temperat ure measurements are based on the change in forward bias voltage of a diode when operated at two different currents. this ? v be is then proportional to absolute temperature as shown in the following equation: where: k = boltzmann?s constant t = absolute temperature in kelvin q = electron charge = diode ideality factor figure 3.2 block diagram of temperature monitoring circuit ? ? ? ? ? ? ? ? = ? = ? 1 2 _ _ ln f f low be high be be i i q kt v v v cpu substrate pnp i f1 i f2 resistance error correction input filter & sampler 11 to 13-bit delta-sigma adc
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 10 smsc EMC1053 datasheet figure 3.2 shows a detailed block diagram of the temperature measurement circuit. the EMC1053 incorporates switched capacitor technology that integrates the temperature diode ? v be . the negative terminal for the remote temperature diode, dn, is internally biased with a forward diode voltage referenced to ground. the advantages of this architecture over nyquist rate flash or sar converters are superb linearity and inherent noise rejection. the linearity can be dire ctly attributed to the delta-sigma adc single bit comparator while the noise rejection is achieved by the 20.48ms integration time for 11-bit resolution. the input bandwidth of the system is fs/2048, this translates to 50hz at a 100khz clock frequency. the remote diodes in the EMC1053 are compatible with a broad range of ther mal diodes that may be constructed as shown in figure 3.3 . 3.5 temperature measur ement results and data each temperature result for each zone is available in two byte wide data registers. as shown in section 4.1 , the 11-bit format has the 8 most significant bits stored in the high byte register and the 3 least significant bits stored in the three msb positions of the low byte register. the delta-sigma adc may be operated with more than 11 bits of resolution the temperature results for the two remote zones are also stored in extended format with a range from -64c to +191c. the data format is a 2?s comp lement number offset by 64c as shown in section 4.2 . the data for each of the remote zones in both legacy and extended format is stored in separate data registers so that both data formats are always available. ta b l e 3 . 1 shows the default and extended range formats. figure 3.3 remote diode configurations local ground to dp typical remote substrate transistor i.e. cpu substrate pnp typical remote discrete pnp transistor i.e. 2n3906 typical remote discrete npn transistor i.e. 2n3904 to dn to dp to dn to dp to dn
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 11 revision 0.58 (09-26-05) datasheet 3.6 resistance error correction the EMC1053 includes resistance error correction implemented in the analog front end of the chip. resistance error correction is an automatic feature that eliminates the need to characterize and compensate for the series resistance in the external diode lines. the EMC1053 corrects for as much as 100 ohms of series resistance. when using a temperature sensor t hat does not include resistance error correction, voltage developed across the parasitic resistance in the remote diode path produces an error in the reported temperature. the error introduced by this resistance is approxim ately 0.7c per ohm. sources of series resistance are pcb trace resistance, on die (i.e. on the processor) metal resistance, bulk resistance in the base and emitter of the te mperature transistor. 3.7 programmable ideality factor to provide maximum flexibility to the user, the emc1 053 provides a 6-bit register for each remote diode as described in section 4.7 . the ideality factor for each remote diode may be configured to eliminate errors across all temperatures when the idealit y factor of the remote diode is not 1.008. the EMC1053 defaults to an ideality factor of 1.008, but not all remote diodes, processor or discrete, have this exact factor. when the ideality factor of the remote diode is not 1.008, the higher the temperature measured, the gr eater the error introduced. the ideality factor must be characterized based on a transistor model for the remote diode. table 3.1 EMC1053 temperature data format temperature (c) range -64c to 127c range -64c to 191c binary offset binary diode fault 100 0000 0000 100 0000 0000 <= -64 110 0000 0000 100 0000 0000 -63.875 110 0000 0001 100 0000 0001 -63 110 0000 1000 100 0000 1000 -1 111 1111 1000 101 1111 1000 0 000 0000 0000 110 0000 0000 0.125 000 0000 0001 110 0000 0001 1 000 0000 1000 110 0000 1000 64 010 0000 0000 000 0000 0000 65 010 0000 1000 000 0000 1000 127 011 1111 1000 001 1111 1000 127.875 011 1111 1111 001 1111 1111 128 011 1111 1111 010 0000 0000 191 011 1111 1111 011 1111 1000 >= 191.875 011 1111 1111 011 1111 1111
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 12 smsc EMC1053 datasheet 3.8 diode faults the EMC1053 detects a fault if the dp pin is left float ing or is shorted to vdd. in the case of a diode fault, the corresponding status bit will be set and the output data will be set at 400h. the internal diode cannot have a fault condition associated with it.
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 13 smsc EMC1053 datasheet chapter 4 register set and description the following registers are accessible through the smbus interface. table 4.1 EMC1053 register set register address r/w register name symbol b7 b6 b5 b4 b3 b2 b1 b0 default value read write 00h n/a r internal temperature high byte - legacy format inthbl sign 64 32 16 8 4 2 1 00h 23h n/a r internal temperature low byte - legacy format intlbl 0.5 0.25 0.125 00h 01h n/a r external diode 1 high byte - legacy format et1hbl sign 64 32 16 8 4 2 1 00h 10h n/a r external diode 1 low byte - legacy format et1lbl 0.5 0.25 0.125 00h f8h n/a r external diode 2 high byte - legacy format et2hbl sign 64 32 16 8 4 2 1 00h f9h n/a r external diode 2 low byte - legacy format et2lbl 0.5 0.25 0.125 00h fah n/a r external diode 1 high byte - extended format et1hbe 128 64 32 16 8 4 2 1 00h fbh n/a r external diode 1 low byte - extended format et1lbe 0.5 0.25 0.125 00h fch n/a r external diode 2 high byte - extended format et2hbe 128 64 32 16 8 4 2 1 00h
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 14 smsc EMC1053 datasheet during power on reset (por), the default va lues are stored in the registers. a por is initiated when power is first applied to the part and the voltage on the vdd supply surpasses the por level as specified in the electrical characteristics. any reads to undefined registers will return 00h. writes to undefined registers will not have an effect. fdh n/a r external diode 2 low byte - extended format et2lbe 0.5 0.25 0.125 00h status and control 02h n/a r status sts busy hott er d2 d1 00h 03h 09h r/w configuration cfg - adc_st op - - - cr<2:0> 45h 04h 04h r/w configuration 2 cfg2 - - - - max_ res da_n comp rec 09h one shot n/a 0fh w one shot conversion shot the data written to th is register is irrelevant and will not be stored 00h ideality 27h 27h r/w external diode 1 ideality correction factor idcf1 - - b5 b4 b3 b2 b1 b0 12h (1.008) 28h 28h r/w external diode 2 ideality correction factor idcf2 - - b5 b4 b3 b2 b1 b0 12h (1.008) edh edh r product id pid 3c feh feh r manufacturer id smsc 0 1 0 1 1 1 0 1 5dh ffh ffh r revision register rev - - - - 0 0 0 0 00h table 4.1 EMC1053 register set (continued) register address r/w register name symbol b7 b6 b5 b4 b3 b2 b1 b0 default value read write
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 15 revision 0.58 (09-26-05) datasheet the EMC1053 uses an interlock mechanism that will only update both high and low byte of a particular monitor when the high byte is read wi th a read command. this prevents changes in register content when fresh readings come in fr om the adc during successi ve reads from a host.
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 16 smsc EMC1053 datasheet 4.1 legacy temperature data re gisters (00h, 03h, 10h, 23h, f8h) as shown in ta b l e 4 . 2 , each temperature monitor has two byte wide data registers. the 11 bit data temperature is stored aligned to t he left resulting in the high byte to contain temperature in 1c steps and the low byte to contain fractions of a degree. please note that the internal temperature monitor is limited to the operating temperature limits of the part resulting in a maximum range of 0oc to 85oc. 4.2 extended format temper ature registers (fah-fdh) table 4.2 legacy temperature data registers register b7 b6 b5 b4 b3 b2 b1 b0 default internal temp high byte - legacy format sign 64 32 16 8 4 2 1 00h internal temp low byte - legacy format 0.5 0.25 0.125 - - - - - 00h external diode 1 high byte - legacy format sign 64 32 16 8 4 2 1 00h external diode 1 low byte - legacy format 0.5 0.25 0.125 - - - - - 00h external diode 2 high byte - legacy format sign 64 32 16 8 4 2 1 00h external diode 2 low byte - legacy format 0.5 0.25 0.125 - - - - - 00h table 4.3 extended temperature data registers register b7 b6 b5 b4 b3 b2 b1 b0 default external diode 1 high byte - extended format 128 64 32 16 8 4 2 1 00h external diode 1 low byte - extended format 0.5 0.25 0.125 - - - - - 00h external diode 2 high byte - extended format 128 64 32 16 8 4 2 1 00h external diode 2 low byte - extended format5 0.5 0.25 0.125 - - - - - 00h
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 17 revision 0.58 (09-26-05) datasheet the extended format temperature regi sters store only the external di ode temperatures in the extended data format. this is because, due to the operating range limitations of the EMC1053, the internal temperature could not benefit from the extended temperature range. like the legacy data formatting, the data is stored in two registers per temperature channel. 4.3 status register - 02h the status register is a read only register and returns the operational status of the part. external diode faults are indicated by bits 1 and 0. if either bit is set to ?1?, then a diode fault has occurred. when a diode fault occurs, the status flag is set, but otherwise the data remains unchanged. bit 7 - busy - indicates that the adc is currently converting a temperature. bit 4 - hotter - during hotter of two mode, this bit indicates which of the external diode channels is hotter. if this bit is ?0?, then external diode 1 is hotter. if this bit is ?1?, then external diode 2 is hotter. during normal operation, this bit will always read a ?0?. bit 1 - d2 - indicates that a diode fault has occurred on external diode 2. bit 0 - d1 - indicates that a diode fault has occurred on external diode 1. 4.4 configuration regis ter (03h read, 09h write) the configuration register contro ls the basic functionality of t he EMC1053. the bits are described below: bit 6 - adc_stop - controls the adc conversions and power modes of the part '0' - the adc is operational and running at the user specified conversion rate. '1' - (default)the adc is disabled and the part is in its shutdown/standby mode. bit 2-0 - cr<2:0> - determines the conversion rate for the temperature monitoring. table 4.4 status register register b7 b6 b5 b4 b3 b2 b1 b0 default status busy - - - - d2 d1 00h table 4.5 configuration register register b7 b6 b5 b4 b3 b2 b1 b0 default config - adc_stop - - - cr2 cr1 cr0 45h
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 18 smsc EMC1053 datasheet 4.5 configuration 2 register - 04h the configuration 2 register controls the basic fu nctionality of the EMC1053 that is not compatible with the emc1023. bit 3 - max_res - controls the number of meas urements taken during dynamic averaging. although the dynamic averaging may be used to increase the adc resolution, only 11 bits of data are available in the temperature registers. ?0? - the dynamic averaging will set the internal adc resolution at 11 bits when the conversion rate is set at 16 conversions per second and 12 bits at conversion rates lower than 16 per second. ?1? - the dynamic averaging will set the internal adc resolution at 11 bits when the conversion rate is set at 16 conversions per second, 12 bits at 8 conversions / second and 13 bits at conversion rates lower than 8 per second. bit 2 - da_n - controls the dynamic digital averaging circuitry. see section 3.3.2 . ?0? (default) - dynamic averaging is enabled. depending on the selected conversion rate, the internal adc resolution is increased for the external diodes. ?1? - dynamic averaging is disabled. the internal adc resolution will remain fixed over all conversion rates and will allow increased pow er savings at the slower conversion rates. table 4.6 conversion rate cr<2:0> conversions / second (conversion time) typical quiescent current ( a ) 21 0 0 0 0 reserved 0 0 1 reserved 0 1 0 reserved 0 1 1 1 conversion / sec 139 1 0 0 2 conversions / sec 200 1 0 1 4 conversions / sec (default) 340 1 1 0 8 conversions / sec 652 1 1 1 16 conversions / sec 756 table 4.7 configuration register 2 register b7 b6 b5 b4 b3 b2 b1 b0 default cfg2 - - - - max_res da_n comp rec 09h
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 19 revision 0.58 (09-26-05) datasheet bit 1 - comp - configures the device to perform a comparison for the hotter of two mode (see section 3.3, "operation during run mode," on page 8 ) ?0? (default) - the device is in normal mode ?1? - the device is in hotter of two mode. in this mode, the two exter nal channels are measured and compared against each other. the hotter of the two channels has its data loaded into the external diode 2 data bytes. the internal channel and external channel 1 data registers remain unaffected. bit 0 - rec - controls the resistance error correction circuitry '0' - the resistance error correction circuitry is disabled. '1' (default)- the resistance error correction circuitr y is active and will auto matically correct for up to 100 ohms of series resistance in the diode lines 4.6 one shot register - 0fh the one shot register is an addr ess place holder for the one-shot command. writing to the address initiates the command. the data written is not impor tant and is not stored. reading from the one-shot registers will always return 00h. table 4.8 overview of averaging options da_n max_res conversion rate internal adc resolution 0 0 16 / sec 11 bit 0 0 8 / sec - 1 / sec 12 bit 0 1 16 / sec 11bit 0 1 8 / sec 12 bit 0 1 4 / sec - 1/sec 13 bit 1 0 16 / sec - 1 / sec 11 bit 1 1 16 / sec - 1 / sec 11 bit table 4.9 one shot registers register b7 b6 b5 b4 b3 b2 b1 b0 default one shot conversion writing to this register address initiates the one-shot. the data is not important and is not stored 00h
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 20 smsc EMC1053 datasheet 4.7 ideality configuration factor registers (27h - 28h) this register stores the ideality correction factor that is (by default) automatically applied to each external diode. the table below shows the ideality factor settings for the ideality configurat ion registers. red shading indicates power-up default. 4.8 product id register (edh) the product id register holds the unique produc t id for identifying smsc emc products. see table 4.1 for a list of the product id number for each version of the EMC1053. table 4.10 ideality c onfiguration register register b7 b6 b5 b4 b3 b2 b1 b0 default diode 1 ideality correction factor - - b5 b4 b3 b2 b1 b0 12h (1.008) diode 2 ideality correction factor - - b5 b4 b3 b2 b1 b0 12h (1.008) table 4.11 ideality configuration setting factor setting factor setting factor setting factor 000000 0.9850 010000 1.0054 100000 1.0267 010000 1.0489 000001 0.9862 010001 1.0067 100001 1.0280 010001 1.0503 000010 0.9875 010010 1.0080 100010 1.0294 010010 1.0517 000011 0.9888 010011 1.0093 100011 1.0308 010011 1.0531 000100 0.9900 010100 1.0106 100100 1.0321 010100 1.0546 000101 0.9913 010101 1.0119 100101 1.0335 010101 1.0560 000110 0.9925 010110 1.0133 100110 1.0349 010110 1.0574 000111 0.9938 010111 1.0146 100111 1.0363 110111 1.0589 001000 0.9951 011000 1.0159 101000 1.0377 111000 1.0603 001001 0.9964 011001 1.0173 101001 1.0391 111001 1.0618 001010 0.9976 011010 1.0186 101010 1.0404 111010 1.0632 001011 0.9989 011011 1.0199 101011 1.0418 111011 1.0647 001100 1.0002 011100 1.0213 101100 1.0432 111100 1.0661 001101 1.0015 011101 1.0226 101101 1.0446 111101 1.0676 001110 1.0028 011110 1.0240 101110 1.0460 111110 1.0690 001111 1.0041 011111 1.0253 101111 1.0475 111111 1.0705
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 21 revision 0.58 (09-26-05) datasheet 4.9 manufacturer id register (feh) the manufacturer id register contains an 8 bit wo rd that identifies the manufacturer of the EMC1053 (smsc = 5dh) 4.10 revision register (ffh) the revision register contains a 4 bit word that identifies the die revision.
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 22 smsc EMC1053 datasheet chapter 5 typical operating curves the following curves show the typical operating characteri stics of the EMC1053 1. temperature measurement accuracy vs. ambient air temperature 2. temperature measurement accuracy vs. external diode temperature 3. temperature measurement accuracy vs. power supply variation 4. supply current vs. conversion rate. 5. temperature accuracy vs. input capacitance 6. diode leakage current vs. ambient die temperature 7. temperature accuracy vs. differential noise.
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet smsc EMC1053 23 revision 0.58 (09-26-05) datasheet chapter 6 package outline figure 6.1 8-pin msop package outline - 3x3mm body 0.65mm pitch table 6.1 8-pin msop package parameters notes: 1. controlling unit: millimeters. 2. tolerance on the true position of the leads is 0.065 mm maximum. 3. package body dimensions d and e1 do not includ e mold protrusion or flash. dimensions d and e1 to be determined at datum plane h. maximum mo ld protrusion or flash is 0.15mm (0.006 inches) per end, and 0.15mm (0.006 inches) per side. 4. dimension for foot length l measured at the gauge plane 0.25 mm ab ove the seating plane. 5. details of pin 1 identifier are optional but must be located within the zone indicated. min nominal max remarks a 0.80 ~ 1.10 overall package height a1 0.05 ~ 0.15 standoff a2 0.75 0.85 0.95 body thickness d 2.80 3.00 3.20 x body size e 4.65 4.90 5.15 y span e1 2.80 ~ 3.20 y body size h 0.08 ~ 0.23 lead foot thickness l 0.40 ~ 0.80 lead foot length l1 0.95 ref lead length e 0.65 bsc lead pitch 0 o ~8 o lead foot angle w 0.22 ~ 0.38 lead width ccc ~ ~ 0.10 coplanarity
1c triple temperature sensor with resistance error correction and hotter of two zones datasheet revision 0.58 (09-26-05) 24 smsc EMC1053 datasheet 6.1 package markings all devices will be marked on the first line of the t op side with ?1053?. on the second line, they will be marked with version (v), revision (r) and country of origin (cc) resulting in a four letter code of (vrcc).

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