View TNETEL1400_9072892.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 1 post office box 655303 ? dallas, texas 75265 single-chip etherloop transceiver programmable transmit (tx) and receive (rx) gain via digital interface low overall power consumption power-down mode minimizes server modem power consumption in multiplexed applications low noise low distortion all terminals protected to survive, without damage, a simulated static discharge of 1 kv from a 100-pf capacitor applied through a 1.5-k w resistor with respect to chip ground (v ee ) single-rail 5-v power supply operating temperature 40 c to 85 c ambient allows operation in central office and distributed-server modem applications 48-pin thin plastic quad flatpack v ee v ee txgain3 txgain2 txgain1 txgain0 ang refp rxbias txbias v cc v ee v ee 24 23 22 21 20 19 18 17 16 15 14 13 37 38 39 40 41 42 43 44 45 46 47 48 v ee nu rxip rxin nu v ee v cc remn txop txon remp v ee pt package (top view) rxgain2 rxgain0 rxgain1 tx_en v nu nu rxout rx_term nu txinp txinn cbias1 remref ip_int op_int in_int on_int nu 36 35 34 33 32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 ee v ee v cc v ee v ee nu not used description the TNETEL1400 is an etherloop transceiver. etherloop technology enables simultaneous voice and ethernet communication over local-loop plain old telephone service (pots) wiring. the TNETEL1400 supports data rates of up to 6 mbit/s and pots wire lengths of up to 21,000 feet. figure 1 shows a typical system with an etherloop modem located at each end of the pots line. each etherloop modem has a 10base-t ethernet interface and is responsible for buffering ethernet data before sending it over the pots wire. the server-end (se) etherloop modem is located in a central switching office and can communicate with several client-end (ce) etherloop modems, based on a round-robin arbitration scheme. the ce etherloop modem typically is located at a remote site. product preview copyright ? 1999, texas instruments incorporated product preview information concerns products in the formative or design phase of development. characteristic data and other specifications are design goals. texas instruments reserves the right to change or discontinue these products without notice. please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. etherloop is a trademark of elastic networks.
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 2 post office box 655303 ? dallas, texas 75265 description (continued) pots line pots line se modem ethernet network central office ce modem ce modem remote location ethernet network ethernet network % % see note a note a: flexible multiplexin g scheme allows one se modem to interface with man y ce modems. pots phone pots phone remote location figure 1. typical etherloop system figure 2 shows a block diagram of a typical ce etherloop modem. ethernet data destined for the pots wire is received via 10base-t interface and presented to the etherloop processor. the etherloop processor performs ethernet frame processing and buffer management. the etherloop processor sends buffered ethernet frames to the tnetel1200 etherloop modem. the tnetel1200 performs data modulation before passing the modulated digital data to a digital-to-analog (dac) converter. the resulting analog signal passes to the TNETEL1400 transceiver, which acts as the line interface. the modem uses a half-duplex communication protocol over the pots wire, and data received from the pots wire follows the reverse path back to the ethernet framer. ethernet network ethernet interface pots line etherloop processor tnetel1200 etherloop modem flash rom sdram dac adc pots phone TNETEL1400 etherloop transceiver sram voice band filter % figure 2. typical ce etherloop modem figure 3 shows a block diagram of a typical se etherloop modem. data flow follows the same path as in the ce etherloop modem. in the se application, the etherloop processor also performs round-robin arbitration between each of the attached TNETEL1400 devices. product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 3 post office box 655303 ? dallas, texas 75265 pots line mux pots line pots line ethernet network ethernet interface etherloop processor tnetel1200 etherloop modem flash rom sdram dac adc sram TNETEL1400 etherloop transceiver TNETEL1400 etherloop transceiver TNETEL1400 etherloop transceiver figure 3. typical se etherloop modem summary of TNETEL1400 etherloop transceiver drives pots line with signal generated by dac interfaces signal received from pots line to adc functional block diagram tx bias rx rxout txop txon rxip rx_term rxin txgain3txgain0 tx_en remref remp remn cbias1 txbias refp rxbias ang rxgain2rxgain0 ip_int op_int in_int on_int txinn txinp product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 4 post office box 655303 ? dallas, texas 75265 application information 2 0.22 m f bias rxgain 5 v txgain 4.99 k w 4.99 k w 100 nf 5 w 5 w 13 w 1% 0.1 m f 2.2 m f 2.2 m f 0.22 m f tx_in rx_mode rx_ou t tx_en rxip rxin txbias rfep rxbias ang cbias1 remn remp remref ip_int op_int in_int on_int txinn txinp 3 4 10 k 0.1 m f 0.22 m f rxterm txop txon 100 nf 100 nf figure 4. etherloop front-end application (ce) 2 all bias resistors should be 1% tolerance. the resistors on remp, remn, and remref also should be 1% and placed as close as pos sible to their respective pins. product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 5 post office box 655303 ? dallas, texas 75265 terminal functions transmit (tx) terminal i/o 2 description name no. i/o 2 description cbias1 2 i/o transmit voltage bias decoupling in_int 6 i transmit interstage ac coupling pin 1 (negative side) ip_int 4 i transmit interstage ac coupling pin 2 (positive side) on_int 7 o transmit interstage ac coupling pin 2 (negative side) op_int 5 o transmit interstage ac coupling pin 1 (positive side) remref 3 o transmit temperature-compensating bias reference tx_en 26 i transmit enable 1 = transmitter enabled 0 = transmitter disabled txbias 16 i transmit current bias txgain3 txgain2 txgain1 txgain0 23 (msb) 22 21 20 (lsb) i transmit preattenuation select (0 to 30 db in 3-db steps) 0000 = 0 db 0001 = 3 db ? ? ? 1010 = 30 db 1011 = tx off ? ? ? 1110 = tx off 1111 = tx off txinn 10 i transmit input negative. txinn can be coupled to ground for se input). txinp 9 i transmit input positive. txinp can be coupled to ground for se input). txon 46 o transmitter output negative txop 45 o transmitter output positive 2 i = input, o = output product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 6 post office box 655303 ? dallas, texas 75265 terminal functions (continued) receive (rx) terminal i/o 2 description name no. i/o 2 description rx_term 30 i receive passive termination rx_term = 1: 110 w switched in rx_term = 0: 110 w switched out rxbias 17 i receive current bias rxgain2 rxgain1 rxgain0 29 (msb) 27 28 (lsb) i receive gain select 000 = rx off ? ? ? 011 = rx off 100 = 0 db 101 = 12 db 110 = 24 db 111 = 30 db rxin 40 i receiver input negative/tx feedback rxip 39 i receiver input positive/tx feedback rxout 31 o receiver output (single ended) 2 i = input, o = output miscellaneous terminal i/o 2 description name no. i/o 2 description ang 19 o analog ground (2.5 v) reference refp 18 o 4-v bandgap reference remn 44 i/o negative external emitter resistor remp 47 i/o positive external emitter resistor 2 i = input, o = output power supply terminal description name no. description nu 8, 11, 32, 33, 38, 41 not used v cc 15, 34, 43 5-v power v ee 1, 12, 13, 14, 24, 25, 35, 36, 37, 42, 48 ground product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 7 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature (unless otherwise noted) 2 supply-voltage range, v cc 4.3 v to v cc to 0.7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input-voltage range: analog inputs 0.7 v to v cc to 0.7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output-voltage range, v o . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg -55 c to 25 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 stresses beyond those listed under aabsolute maximum ratingso may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under arecommended operating conditi onso is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. recommended operating conditions min max unit v cc supply voltage 4.75 5.25 v v ih high-level input voltage 2.1 v v il low-level input voltage 1 v i oh high-level input current ma i ol low-level input current ma t a operating free-air temperature range 40 85 c product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 8 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating conditions parameter test conditions min typ 2 max unit i cc su pp ly current normal operation 25 50 m a i cc s u ppl y c u rrent power-down mode 1.5 3 m a v ref 4-v reference voltage 3.88 4 4.12 v v ang 2.5-v reference voltage 2.38 2.5 2.62 v i refp 4-v reference current source 1 ma i ang 2.5-v reference current source/sink 100 ma 2 all typical values are at v cc = 5 v, t a = 25 c (unless otherwise noted). transmitter (see figure 5) parameter test conditions min typ 2 max unit tx maximum output level v cc = 5 v, r l = 110 w , rx_term = 0, tx_en = 1, v (txinp) = 1.2 v pp sinusoid at f = 500 khz (see note 1) txgain = 0000, rxgain = 0xx 21 22 23 dbm txgain = 0001 3.3 3 2.7 txgain = 0010 6.3 6 5.7 txgain = 0011 9.3 9 8.7 tx attentuator accuracy v cc = 5 v, r l = 110 w , txgain = 0100 12.3 12 11.7 tx attentuator accuracy ( relative to maximum output ) rx_term = 0, tx_en = 1, rxgain = 0xx, v (txinp) =12v pp sinusoid a t f = 500 khz txgain = 0101 15.3 15 14.7 db () tx attentuator accuracy ( l ti t i t t) v (txinp) = 1 . 2 v pp sinusoid at f = 500 khz [ output is measured at in _ int and ip _ int txgain = 0110 18.3 18 17.7 db (relative to maximum output) [out ut is measured at in _ int and ip _ int (ac coupled)] txgain = 0111 21.3 21 20.7 txgain = 1000 24.3 24 23.7 txgain = 1001 27.3 27 26.7 txgain = 1010 30.3 30 29.7 tx output level variation over frequency 30 khz < f < 2.5 mhz monotonically decreasing for f > 3 mhz, r l = 110 w , rx_term = 0, tx_en = 1, v (txinp) = 1.2 v pp sinusoid at f = 500 khz with transformer connected as in figure 1 (see note 1) txgain = 0000, rxgain = 0xx 1 db tx output distortion odd harmonics v cc = 5 v, r l = 110 w , rx_term = 0, tx_en = 1, txgain = 0000, 35 dbc (all gain settings) even harmonics _ , _ , v (txinp) = 1.2 v pp sinusoid at f = 500 khz (see note 1) , rxgain = 0xx 50 dbc tx output signal-to-noise ratio (snr) (all gain settings) v cc = 5 v, r l = 110 w , rx_term = 0, tx_en = 1, v (txinp) = 1.2 v pp sinusoid at f = 500 khz (see note 1) txgain = 0000, rxgain = 0xx 50 db tx maximum output-level variation with v cc v cc = 5 v 0.25 v, r l = 110 w , rx_term = 0, tx_en = 1, v (txinp) = 1.2 v pp sinusoid at f = 500 khz (see note 1) txgain = 0000, rxgain = 0xx 1 db/v z in(txin) tx input impedance txgain = 0000, rxgain = 0xx (see note 1) 1400 typ+ 30% w tx input impedance variation as percent of z in(txin) txgain = 0000, rxgain = 0xx 30% 30% 2 all typical values are at v cc = 5 v, t a = 25 c (unless otherwise noted). note 1: while the rx circuit is disabled during transmission, it is still connected and, therefore, must withstand the signal le vels placed at its input terminals. product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 9 post office box 655303 ? dallas, texas 75265 transmitter (see figure 5) (continued) parameter test conditions min typ 2 max unit i rms(txop) i rms(txon) tx output current balance v cc = 5 v, r l = 110 w , rx_term = 0, tx_en = 1, v (txinp) = 1.2 v pp sinusoid at f = 500 khz (see note 1) txgain = 0000, rxgain = 0xx 5 5 ma tx output stability source impedance 50 w , supply impedance 10 w , z loads : voltage standing-wave ratio (vswr) 4:1 and open circuit txgain = 0000, rxgain = 0xx tx su pp ly current v out = 0, txgain = 0000 35 45 ma tx s u ppl y c u rrent v out = max, txgain = 0000 120 ma tx output return loss txgain = 0000, rxgain = 0xx 18 db tx power-up time txgain = 0000, rxgain = 0xx (see note 2) 100 m s 2 all typical values are at v cc = 5 v, t a = 25 c (unless otherwise noted). notes: 1. while the rx circuit is disabled during transmission, it is still connected and, therefore, must withstand the signal l evels placed at its input terminals. 2. the power-up/power-down time is the time it takes for the signal path to completely settle and meet all the transmission spec ifications after txgain and rxgain are set to power-up condition or switched from one gain setting to another. this time consists of slewi ng and exponential settling of bias and ac coupling capacitors and, therefore, the values of these components must be as shown in the application diagram, figure 4. receiver (see figures 6 and 7) parameter test conditions min typ 2 max unit r l =2k w c l =20 p f 30khz 3 mhz, tx_en = 0, v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz rx_term = 1, rxgain = 111 1 1 db rx power-supply rejection (wrt v cc only) r l = 2 k w , c l = 20 pf, dc < f < 3 mhz, tx_en = 0, v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz rx_term = 1, rxgain = 111 0.03 v/v rx common-mode rejection r l = 2 k w , c l = 20 pf, tx_en = 0, v (rxin) = 1.5 v pp , v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz rx_term = 1, rxgain = 111 30 db rx iip3 intercept r l = 2 k w , c l = 20 pf, tx_en = 0, v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz (see note 4) rx_term = 1, rxgain = 111 17 dbm 2 all typical values are at v cc = 5 v, t a = 25 c (unless otherwise noted). notes: 3. idle channel noise is the noise (v rms ) measured at rxout with no signal at rxin. this voltage is integrated over the 30-khz to 2.75-mhz band. this specification is in place of the original noise-figure specification, and is correlated to nf with laborato ry measurements. 4. the two tones used for this test are at 1.39 mhz and 1.58 mhz, and the in-band iip3 products are at 1.2 mhz and 1.77 mhz. the iip3 intercept point is the output power level, where the power of the harmonics equals that of the signal frequencies. this po int is an intersection of two straight lines extrapolated from two low-power measurements. product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 10 post office box 655303 ? dallas, texas 75265 receiver (see figures 6 and 7) (continued) parameter test conditions min typ 2 max unit rx output total harmonic distortion r l = 2 k w , c l = 20 pf, tx_en = 0, v (rxout) = 2 v pp , v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz rx_term = 1, rxgain = 111 40 dbc rx z in r l = 2 k w , c l = 20 pf, rxgain = 111, tx_en = 0, rx_term = 1 77 110 143 w rx z in l , l ,,_, v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz rx_term = 0 10 k w rx maximum supply current r l = 2 k w , c l = 20 pf, tx_en = 0, v (rxout) = 4 v pp , v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz rx_term = 1, rxgain = 111 20 ma rx power-up time r l = 2 k w , c l = 20 pf, tx_en = 0, v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz (see note 2) rx_term = 1, rxgain = 111 30 m s power-down supply current r l = 2 k w , c l = 20 pf, rx_term = 1, tx_en = 0, v (rxip rxin) = 0.04 v pp sinusoid at f = 500 khz (see note 2) txgain = 1111, rxgain = 000 3 ma 2 all typical values are at v cc = 5 v, t a = 25 c (unless otherwise noted). note 2. the power-up/power-down time is the time it takes for the signal path to completely settle and meet all the transmission specifications after txgain and rxgain are set to power-up condition or switched from one gain setting to another. this time consists of slewi ng and exponential settling of bias and ac coupling capacitors and, therefore, the values of these components must be as shown in the application diagram, figure 4. product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 11 post office box 655303 ? dallas, texas 75265 bias 5 v txgain 4.99 k w 80.6 k w 5 w 5 w 7.5 w 33 nf 33 nf 1 m f 1 m f 110 v 33 nf 33 nf + v i [000] rxgain rx_term 4 3 100 nf 100 nf 100 nf figure 5. tx test circuit product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 12 post office box 655303 ? dallas, texas 75265 bias rxgain [1111] 4.99 k w 80.6 k w 5 w 5 w 7.5 w 33 nf 33 nf 1 m f1 m f 0.04 v pp + 2 k w 100 nf 4 3 100 nf 100 nf 100 nf figure 6. rx test circuit product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 13 post office box 655303 ? dallas, texas 75265 bias rxgain [1111] 4.99 k w 80.6 k w 5 w 5 w 7.5 w 33 nf 33 nf 1 m f 110 w 4 3 1 m f 100 nf 100 nf 100 nf figure 7. rx noise test circuit product preview
TNETEL1400 etherloop ? transceiver sphs004a february 1999 revised march 1999 14 post office box 655303 ? dallas, texas 75265 mechanical data pt (s-pqfp-g48) plastic quad flatpack 4040052 / c 11/96 0,13 nom 0,17 0,27 25 24 sq 12 13 36 37 6,80 7,20 1 48 5,50 typ 0,25 0,45 0,75 0,05 min sq 9,20 8,80 1,35 1,45 1,60 max gage plane seating plane 0,10 0 7 0,50 m 0,08 notes: a. all linear dimensions are in millimeters. b. this drawing is subject to change without notice. c. falls within jedec ms-026 d. this may also be a thermally enhanced plastic package with leads conected to the die pads. product preview
important notice texas instruments and its subsidiaries (ti) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. all products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. ti warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with ti's standard warranty. testing and other quality control techniques are utilized to the extent ti deems necessary to support this warranty. specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (acritical applicationso). ti semiconductor products are not designed, authorized, or warranted to be suitable for use in life-support devices or systems or other critical applications. inclusion of ti products in such applications is understood to be fully at the customer's risk. in order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. ti assumes no liability for applications assistance or customer product design. ti does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of ti covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. ti's publication of information regarding any third party's products or services does not constitute ti's approval, warranty or endorsement thereof. copyright ? 1999, texas instruments incorporated

▲Up To Search▲

Price & Availability of TNETEL1400

	To Download TNETEL1400 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .