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TC1031
Linear Building Block - Low Power Voltage Reference with Programmable Hysteresis Comparator and Shutdown
Features
* Combines Comparator and Voltage Reference in a Single Package * Optimized for Single Supply Operation * Small Package: 8-Pin MSOP * Ultra Low Input Bias Current: Less than 100pA * Low Quiescent Current, Active: 6A (Typ.), Shutdown Mode: 0.1A (Typ.) * Rail-to-Rail Inputs and Outputs * Operates Down to VDD = 1.8V * Programmable Hysteresis
General Description
The TC1031 is a low-power comparator and voltage reference designed specifically for low-power applications. The TC1031 is designed for operation from a single supply, however operation from dual supplies is also possible. The power supply current drain is independent of the magnitude of the power supply voltage. The TC1031 can operate from two 1.5V alkaline cells, and operation is ensured to VDD = 1.8V. Typical active supply current is 6A. Rail-to-rail inputs and outputs allow operation from low supply voltages with large input and output signal swings. The TC1031 provides a simple method for adding useradjustable hysteresis without feedback or complex external circuitry. Hysteresis is adjusted with a simple resistor divider on the HYST input. A shutdown input, SHDN, disables the comparator and voltage reference and reduces supply current to less than 0.1A (maximum) when taken low. Temperature Range -40C to +85C The TC1031 is packaged in a space-saving 8-Pin MSOP, making it ideal for applications requiring high integration, small size and low power.
Applications
* Power Management Circuits * Battery Operated Equipment * Consumer Products
Device Selection Table
Part Number TC1031CEUA Package 8-Pin MSOP
Functional Block Diagram
1 VSS
Package Type
8-Pin MSOP
VSS SHDN INA+ INA1 2 3 4 8 7 OUT VDD VREF
IN+ SHDN
TC1031
8
OUT
2 + - 3 Voltage Reference
7
VDD
TC1031CEUA
6 5
6
HYST
VREF
IN-
4
5
HYST
2002 Microchip Technology Inc.
DS21342B-page 1
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TC1031
1.0 ELECTRICAL CHARACTERISTICS
*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage ......................................................6.0V Voltage on Any Pin .......... (V SS - 0.3V) to (VDD + 0.3V) Junction Temperature....................................... +150C Operating Temperature Range............. -40C to +85C Storage Temperature Range .............. -55C to +150C
TC1031 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Typical values apply at 25C and VDD = 3.0V; TA = -40 to +85C, and VDD = 1.8V to 5.5V, unless otherwise specified. Symbol VDD IQ ISHDN VIH VIL ISI Comparator ROUT (SD) COUT (SD) TSEL TDESEL VICMR VOS IB VOH VOL CMRR PSRR ISRC Output Resistance in Shutdown Output Capacitance in Shutdown Select Time Deselect Time Common-Mode Input Voltage Range Input Offset Voltage (Note 1) Input Bias Current Output High Voltage Output Low Voltage Common Mode Rejection Ratio Power Supply Rejection Ratio Output Source Current 20 -- -- -- VSS - 0.2 -5 -- VDD - 0.3 -- 66 60 1 -- -- 20 500 -- -- -- -- -- -- -- -- -- 5 -- -- VDD + 0.2 +5 100 -- 0.3 -- -- -- M pF sec nsec V mV pA V V dB dB mA VDD = 3V, VCM = 1.5V TA = 25C IN+, IN- = VDD to VSS RL = 10k to V SS RL = 10k to V DD TA = 25C, VDD = 5V VCM = VDD to VSS TA = 25C, VDD = 1.8V to 5V VCM = 1.2V IN+ = VDD, IN- = VSS VDD = 1.8V, Output Shorted to VSS IN+ = VSS, IN- = VDD, VDD = 1.8V, Output Shorted to VDD SHDN = VSS SHDN = VSS VOUT Valid from SHDN = VIH RL=10k to VSS VOUT Invalid from SHDN = VIL RL=10k to VSS Parameter Supply Voltage Supply Current, Operating Supply Current, Shutdown Input High Threshold Input Low Threshold Shutdown Input Current Min 1.8 -- -- 80% VDD -- -- Typ -- 6 -- -- -- -- Max 5.5 10 0.1 -- 20% VDD 100 Units V A A V V nA All Outputs Open, SHDN = VDD SHDN = VSS Test Conditions
Shutdown Input
ISINK
Output Sink Current
2
--
--
mA
VHYST IHYST tPD1 tPD2
Note 1:
Voltage Range at HYST Pin Hysteresis Input Current Response Time Response Time
VREF - 0.08 -- -- --
-- -- 4 6
VREF 100 -- --
V nA sec sec 100mV Overdrive; CL = 100pF 100mV Overdrive; CL = 100pF
VOS is measured as (VUT + VLT - 2VREF)/2 where VUT is the upper hysteresis threshold and VLT is the lower hysteresis threshold with VREF - VHYST set to 10mV. This represents the asymmetry of the hysteresis thresholds around VREF
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DS21342B-page 2
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TC1031
TC1031 ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Typical values apply at 25C and VDD = 3.0V; TA = -40 to +85C, and VDD = 1.8V to 5.5V, unless otherwise specified. Symbol Voltage Reference VREF IREF(SINK) ROUT (SD) COUT (SD) TSEL TDESEL CL(REF) EVREF eVREF
Note 1:
Parameter
Min
Typ
Max
Units
Test Conditions
Reference Voltage Sink Current Output Resistance in Shutdown Output Capacitance in Shutdown Select Time Deselect Time Load Capacitance Voltage Noise Noise Density
1.176 50 50 20 -- -- -- -- -- --
1.200 -- -- -- -- 200 10 -- 20 10
1.224 -- -- -- 5 -- -- 100 -- --
V A A M pF sec sec pF VRMS 100Hz to 100kHz V/Hz 1kHz SHDN = VSS SHDN = VSS REF Valid from SHDN = VIH RL = 100k to VSS REF Invalid from SHDN = VIL RL = 100k
IREF(SOURCE) Source Current
VOS is measured as (VUT + VLT - 2VREF)/2 where VUT is the upper hysteresis threshold and VLT is the lower hysteresis threshold with VREF - VHYST set to 10mV. This represents the asymmetry of the hysteresis thresholds around VREF
2002 Microchip Technology Inc.
DS21342B-page 3
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TC1031
2.0 PIN DESCRIPTIONS
The description of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. (8-Pin MSOP) 1 2 3 4 5 6 7 8
PIN FUNCTION TABLE
Symbol VSS SHDN IN+ INHYST VREF VDD OUT Negative power supply. Shutdown input. Comparator non-inverting input. Comparator inverting input. Adjustable hysteresis input. Voltage reference output. Positive power supply. Comparator output. Description
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DS21342B-page 4
2002 Microchip Technology Inc.
TC1031
3.0 DETAILED DESCRIPTION
3.3 Shutdown Input
The TC1031 is one of a series of very low-power, linear building block products targeted at low-voltage, singlesupply applications. Minimum operating voltage for the device is 1.8V, and typical supply current is only 6A (fully enabled). It combines one comparator and a voltage reference in a single package. The comparator and reference outputs are in a high-impedance state during shutdown. SHDN at VIL disables both the comparator and voltage reference and reduces the supply current to less than 0.1A. The SHDN input cannot be allowed to float; when not used, connect it to VDD. The outputs are in a high impedance state when the TC1031 is disabled. The comparator's inputs and output can be driven from rail-to-rail by an external voltage when the TC1031 is disabled. No latchup will occur when the device is driven to its enabled state when SHDN is set to VIH.
3.1
Comparator
The TC1031 contains one comparator with programmable hysteresis. The range of the inputs extends beyond both supply voltages by 200mV. The comparator outputs will swing to within several millivolts of the supplies depending on the load current being driven. The comparator exhibits a propagation delay and supply current which is largely independent of supply voltage. The low input bias current and offset voltage make it suitable for high impedance precision applications. The comparator is disabled during shutdown and has high-impedance output.
3.4
Programmable Hysteresis
Hysteresis is added to the comparators by connecting a resistor R1 between the VREF and HYST pins and another resistor R2 between the HYST pin and VSS. For no hysteresis VREF should be directly connected to HYST. The hysteresis, VHB, is equal to twice the voltage difference between the VREF and HYST pins, where: VHB = 2 * VREF * R1/(R1 + R2) (See Figure 3-1) and is symmetrical around the normal (without hysterersis) threshold of the comparator. The maximum voltage allowed between the VREF and HYST pins is 80mV, giving a maximum hysteresis of 160mV.
3.2
Voltage Reference
A 2.0% tolerance, internally biased, 1.20V bandgap voltage reference is included in the TC1031. It has a push-pull output capable of sourcing and sinking at least 50A. The voltage reference is disabled during shutdown, with a high-impedance output.
FIGURE 3-1:
TC1031 PROGRAMMABLE HYSTERESIS
6 R1 IREF 5 HYST VREF R1 =
VHB (2) (IREF) VHB 2
(1.200V - R2 =
)
IREF
R2 1 VSS
TC1031
Note: Size R1 and R2 such that IREF 50A
4.0
TYPICAL APPLICATIONS
The TC1031 lends itself to a wide variety of applications, particularly in battery-powered systems. It typically finds application in power management, processor supervisory and interface circuitry.
2002 Microchip Technology Inc.
DS21342B-page 5
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TC1031
5.0
Note:
TYPICAL CHARACTERISTICS
The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Comparator Propagation Delay vs. Supply Voltage
7
DELAY TO RISING EDGE (sec) DELAY TO FALLING EDGE (sec)
Comparator Propagation Delay vs. Supply Voltage
7 6
DELAY TO RISING EDGE (sec)
Comparator Propagation Delay vs. Temperature
7 Overdrive = 100mV 6
TA = 25C CL = 100pF
TA = 25C CL = 100pF
6 Overdrive = 10mV
Overdrive = 10mV
5 4
5 4 Overdrive = 100mV Overdrive = 50mV
5
VDD = 5V VDD = 4V
3 2 1.5 2 2.5 3
Overdrive = 50mV
3 2
4
VDD = 2V VDD = 3V
3 1.5 2 2.5 3 3.5 4 4.5 5 5.5 -40C 25C SUPPLY VOLTAGE (V)
3.5
4
4.5
5
5.5
85C
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
Comparator Propagation Delay vs. Temperature
7 DELAY TO FALLING EDGE (sec) Overdrive = 100mV 6 VDD - VOUT (V)
VDD = 5V
Comparator Output Swing vs. Output Source Current
2.5 2.0
VDD = 3V VDD = 1.8V
TA = 25C
Comparator Output Swing vs. Output Sink Current
2.5 2.0 VOUT - VSS (V)
TA = 25C
5
VDD = 4V VDD = 3V VDD = 2V
1.5 1.0
1.5 1.0
VDD = 3V VDD = 1.8V VDD = 5.5V
4
.5 0 25C TEMPERATURE (C) 85C 0 1
VDD = 5.5V
.5 0
3 -40C
3 2 4 ISOURCE (mA)
5
6
0
1
2
3
4
5
6
ISINK (mA)
60 TA = -40C 50 40 TA = 85C 30 20 Sinking 10 Sourcing 0 0 REFERENCE VOLTAGE (V) TA = 25C
1.240
VDD = 1.8V VDD = 3V VDD = 5.5V
SUPPLY AND REFERENCE VOLTAGES (V)
Comparator Output Short-Circuit Current vs. Supply Voltage
OUTPUT SHORT-CIRCUIT CURRENT (mA)
Reference Voltage vs. Load Current
Line Transient Response of VREF
4
VDD
1.220 1.200 1.180 1.160
VDD = 1.8V
3
Sinking
TA
=
-4
C 0
Sourcing
2
VREF
TA = 25C TA = 85C 6
VDD = 5.5V VDD = 3V
1
1.140 0 2 4
0 0 100 200 TIME (sec) 300 400
3 1 2 4 5 SUPPLY VOLTAGE (V)
6
8
10
LOAD CURRENT (mA)
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DS21342B-page 6
2002 Microchip Technology Inc.
TC1031
5.0 TYPICAL CHARACTERISTICS (CONTINUED)
Reference Voltage vs. Supply Voltage
1.25
Supply Current vs. Supply Voltage
8 7 TA = 85C 6 TA = -40C 5 4 3 TA = 25C
REFERENCE VOLTAGE (V)
1.20
1.15
1.10
1.05 1 4 2 3 SUPPLY VOLTAGE (V) 5
SUPPLY CURRENT (A)
2 0 1 2 3 4 5 SUPPLY VOLTAGE (V) 6
2002 Microchip Technology Inc.
DS21342B-page 7
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TC1031
6.0
6.1
PACKAGING INFORMATION
Package Marking Information
Package marking data not available at this time.
6.2
Taping Form
Component Taping Orientation for 8-Pin MSOP Devices
User Direction of Feed
PIN 1
W
P Standard Reel Component Orientation for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
8-Pin MSOP
12 mm
8 mm
2500
13 in
6.3
Package Dimensions
8-Pin MSOP
PIN 1
.122 (3.10) .114 (2.90)
.197 (5.00) .189 (4.80)
.026 (0.65) TYP.
.122 (3.10) .114 (2.90) .043 (1.10) MAX. .016 (0.40) .010 (0.25) .006 (0.15) .002 (0.05)
6 MAX. .028 (0.70) .016 (0.40)
.008 (0.20) .005 (0.13)
Dimensions: inches (mm)
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DS21342B-page 8
2002 Microchip Technology Inc.
TC1031
Sales and Support
Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.
DS21342B-page9
TC1031
NOTES:
DS21342B-page10
2002 Microchip Technology Inc.
TC1031
Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company's quality system processes and procedures are QS-9000 compliant for its PICmicro (R) 8-bit MCUs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001 certified.
2002 Microchip Technology Inc.
DS21342B-page 11
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DS21342B-page 12
2002 Microchip Technology Inc.
*B24312SD*

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