TC1031 Linear Building Block – Low Power Voltage Reference with Programmable Hysteresis Comparator and Shutdown Features General Description • 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: 6µA (Typ.), Shutdown Mode: 0.1µA (Typ.) • Rail-to-Rail Inputs and Outputs • Operates Down to VDD = 1.8V • Programmable Hysteresis 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 6µA. 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 0.1µA (maximum) when taken low. Applications • Power Management Circuits • Battery Operated Equipment • Consumer Products Device Selection Table Part Number Package Temperature Range TC1031CEUA 8-Pin MSOP -40°C to +85°C The TC1031 is packaged in a space-saving 8-Pin MSOP, making it ideal for applications requiring high integration, small size and low power. Functional Block Diagram Package Type 1 VSS TC1031 8 OUT 8-Pin MSOP VSS 1 8 OUT SHDN 2 7 VDD INA+ 3 6 VREF SHDN 2 7 + INA- TC1031CEUA – IN+ 4 5 6 3 HYST VREF Voltage Reference IN- 2002 Microchip Technology Inc. VDD 4 5 HYST DS21342B-page 1 TC1031 1.0 ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS* Supply Voltage ......................................................6.0V Voltage on Any Pin .......... (V SS – 0.3V) to (VDD + 0.3V) Junction Temperature....................................... +150°C Operating Temperature Range............. -40°C to +85°C Storage Temperature Range .............. -55°C to +150°C *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. TC1031 ELECTRICAL SPECIFICATIONS Electrical Characteristics: Typical values apply at 25°C and VDD = 3.0V; TA = -40° to +85°C, and VDD = 1.8V to 5.5V, unless otherwise specified. Symbol Parameter Min Typ Max Units Test Conditions VDD Supply Voltage 1.8 — 5.5 V IQ Supply Current, Operating — 6 10 µA All Outputs Open, SHDN = VDD ISHDN Supply Current, Shutdown — — 0.1 µA SHDN = VSS Shutdown Input VIH Input High Threshold 80% VDD — — V VIL Input Low Threshold — — 20% VDD V ISI Shutdown Input Current — — ±100 nA ROUT (SD) Output Resistance in Shutdown 20 — — MΩ COUT (SD) Output Capacitance in Shutdown — — 5 pF TSEL Select Time — 20 — µsec VOUT Valid from SHDN = VIH RL=10kΩ to VSS TDESEL Deselect Time — 500 — nsec VOUT Invalid from SHDN = VIL RL=10kΩ to VSS Comparator SHDN = VSS SHDN = VSS VICMR Common-Mode Input Voltage Range VSS – 0.2 — VDD + 0.2 V VOS Input Offset Voltage (Note 1) –5 — +5 mV VDD = 3V, VCM = 1.5V IB Input Bias Current — — ±100 pA TA = 25°C IN+, IN- = VDD to VSS VOH Output High Voltage VDD – 0.3 — — V RL = 10kΩ to V SS VOL Output Low Voltage — — 0.3 V RL = 10kΩ to V DD CMRR Common Mode Rejection Ratio 66 — — dB TA = 25°C, VDD = 5V VCM = VDD to VSS PSRR Power Supply Rejection Ratio 60 — — dB TA = 25°C, VDD = 1.8V to 5V VCM = 1.2V ISRC Output Source Current 1 — — mA IN+ = VDD, IN- = VSS VDD = 1.8V, Output Shorted to VSS ISINK Output Sink Current 2 — — mA IN+ = VSS, IN- = VDD, VDD = 1.8V, Output Shorted to VDD VHYST Voltage Range at HYST Pin VREF – 0.08 — VREF V IHYST Hysteresis Input Current — — ±100 nA tPD1 Response Time — 4 — µsec 100mV Overdrive; CL = 100pF tPD2 Response Time — 6 — µsec 100mV Overdrive; CL = 100pF Note 1: 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 DS21342B-page 2 2002 Microchip Technology Inc. TC1031 TC1031 ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: Typical values apply at 25°C and VDD = 3.0V; TA = -40° to +85°C, and VDD = 1.8V to 5.5V, unless otherwise specified. Symbol Parameter Min Typ Max Units 1.176 1.200 1.224 V 50 — — µA Test Conditions Voltage Reference Reference Voltage VREF IREF(SOURCE) Source Current IREF(SINK) Sink Current 50 — — µA ROUT (SD) Output Resistance in Shutdown 20 — — MΩ COUT (SD) Output Capacitance in Shutdown — — 5 pF TSEL Select Time — 200 — µsec REF Valid from SHDN = VIH RL = 100kΩ to VSS TDESEL Deselect Time — 10 — µsec REF Invalid from SHDN = VIL RL = 100kΩ CL(REF) Load Capacitance — — 100 pF EVREF Voltage Noise — 20 — µVRMS eVREF Noise Density — 10 — µV/√Hz 1kHz Note 1: SHDN = VSS SHDN = VSS 100Hz to 100kHz 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 TC1031 2.0 PIN DESCRIPTIONS The description of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (8-Pin MSOP) Symbol 1 VSS 2 SHDN 3 IN+ Comparator non-inverting input. 4 IN- Comparator inverting input. 5 HYST Adjustable hysteresis input. 6 VREF Voltage reference output. 7 VDD Positive power supply. 8 OUT Comparator output. DS21342B-page 4 Description Negative power supply. Shutdown input. 2002 Microchip Technology Inc. TC1031 3.0 DETAILED DESCRIPTION 3.3 SHDN at VIL disables both the comparator and voltage reference and reduces the supply current to less than 0.1µA. 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. 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 6µA (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. 3.1 Comparator 3.4 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. 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: 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. VHB = 2 * VREF * R1/(R1 + R2) (See Figure 3-1) The comparator is disabled during shutdown and has high-impedance output. 3.2 Shutdown Input 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. 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 50µA. The voltage reference is disabled during shutdown, with a high-impedance output. FIGURE 3-1: TC1031 PROGRAMMABLE HYSTERESIS 6 VREF R1 = R1 IREF 5 VHB (2) (IREF) (1.200V – R2 = HYST VHB 2 ) IREF R2 1 VSS TC1031 Note: Size R1 and R2 such that IREF ≤ 50µA 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 TC1031 TYPICAL CHARACTERISTICS Note: 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 TA = 25°C CL = 100pF DELAY TO FALLING EDGE (µsec) 6 Overdrive = 10mV 5 4 Overdrive = 50mV 3 2 6 Overdrive = 10mV 5 Overdrive = 100mV Overdrive = 50mV 4 3 2 2.5 3 3.5 4 4.5 5 1.5 5.5 2 6 VDD = 5V 5 VDD = 4V VDD = 2V 4 VDD = 3V 2.5 3 3.5 4 4.5 5 5.5 -40°C 2.5 2.5 TA = 25°C Overdrive = 100mV VDD = 4V VDD = 3V VDD = 2V 4 VOUT - VSS (V) VDD - VOUT (V) VDD = 5V TA = 25°C 2.0 2.0 6 85°C Comparator Output Swing vs. Output Sink Current Comparator Output Swing vs. Output Source Current 7 25°C TEMPERATURE (°C) SUPPLY VOLTAGE (V) Comparator Propagation Delay vs. Temperature 5 Overdrive = 100mV 3 SUPPLY VOLTAGE (V) DELAY TO FALLING EDGE (µsec) 7 TA = 25°C CL = 100pF 2 1.5 VDD = 3V 1.5 VDD = 1.8V 1.0 VDD = 5.5V .5 1.5 VDD = 3V 1.0 VDD = 1.8V .5 VDD = 5.5V 3 -40°C 0 0 25°C 0 85°C 3 2 4 ISOURCE (mA) 1 TEMPERATURE (°C) Comparator Output Short-Circuit Current vs. Supply Voltage 5 TA = -40°C 50 TA = 25°C 40 TA = 85°C C 0° 30 TA 20 Sinking 10 Sourcing 0 0 = -4 TA = 25°C TA = 85°C 3 1 2 4 5 SUPPLY VOLTAGE (V) DS21342B-page 6 VDD = 1.8V VDD = 3V 1.220 VDD = 5.5V Sinking 1.200 Sourcing 1.180 VDD = 5.5V 1.160 VDD = 1.8V VDD = 3V 1.140 6 0 2 4 6 1 2 3 4 5 6 ISINK (mA) 1.240 60 0 6 Reference Voltage vs. Load Current REFERENCE VOLTAGE (V) OUTPUT SHORT-CIRCUIT CURRENT (mA) Comparator Propagation Delay vs. Temperature 8 LOAD CURRENT (mA) 10 SUPPLY AND REFERENCE VOLTAGES (V) DELAY TO RISING EDGE (µsec) 7 Comparator Propagation Delay vs. Supply Voltage DELAY TO RISING EDGE (µsec) 5.0 Line Transient Response of VREF 4 VDD 3 2 VREF 1 0 0 100 200 300 400 TIME (µsec) 2002 Microchip Technology Inc. TC1031 5.0 TYPICAL CHARACTERISTICS (CONTINUED) Reference Voltage vs. Supply Voltage Supply Current vs. Supply Voltage 8 SUPPLY CURRENT (µA) REFERENCE VOLTAGE (V) 1.25 1.20 1.15 1.10 7 TA = 85°C 6 TA = -40°C TA = 25°C 5 4 3 1.05 2 1 4 2 3 SUPPLY VOLTAGE (V) 2002 Microchip Technology Inc. 5 0 1 2 3 4 5 SUPPLY VOLTAGE (V) 6 DS21342B-page 7 TC1031 6.0 PACKAGING INFORMATION 6.1 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 8-Pin MSOP 6.3 Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 12 mm 8 mm 2500 13 in 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) .008 (0.20) .005 (0.13) 6° MAX. .028 (0.70) .016 (0.40) Dimensions: inches (mm) 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. 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