POPA991IDBVR Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
Texas Instruments POPA991IDBVR is an automotive-grade single operational amplifier with 40 V supply, 4.5 MHz bandwidth, and 21 V/µs slew rate. It features rail-to-rail input/output, 665 µV maximum offset voltage, and 110 dB minimum CMRR in a SOT-23 5-pin package. Low supply current of 0.685 mA maximum suits always-on automotive sensor nodes.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- POPA991IDBVR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 40 V supply voltage with automotive temperature grade supports direct use on 12 V and 24 V vehicle rails with full AEC-Q100 qualification
- 110 dB minimum CMRR and 665 µV maximum offset voltage deliver precision signal conditioning with low DC error
- 4.5 MHz bandwidth and 21 V/µs slew rate enable fast amplification of sensor signals in active filter and buffer stages
- Rail-to-rail input/output with only 0.685 mA maximum supply current suits low-power always-on automotive sensing applications
Applications
The POPA991IDBVR is designed for automotive sensor signal conditioning where a wide 40 V supply range, precision 665 µV offset, and rail-to-rail swing are required in a compact SOT-23 package. It suits current sensing, temperature sensor amplification, and position sensor buffering in body control modules, HVAC systems, and chassis ECUs operating from 12 V or 24 V automotive rails. Its low 0.685 mA quiescent current makes it ideal for always-on sensing circuits that must operate during vehicle standby without draining the battery.
Specifications
| Date Of Intro | 2020-06-05 |
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Common-mode Reject Ratio-Min | 110dB |
| Common-mode Reject Ratio-Nom | 125dB |
| Input Offset Voltage-Max | 665 µV |
| Number of Functions | 1 |
| Slew Rate-Nom | 21V/us |
| Supply Current-Max | 0.685mA |
| Temperature Grade | AUTOMOTIVE |
| Unity Gain BW-Nom | 4500 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for POPA991IDBVR:
Frequently Asked Questions
How does the 40 V supply range of POPA991IDBVR benefit automotive 12 V and 24 V system designs?
Automotive 12 V systems can experience load-dump transients reaching 40 V, and 24 V truck systems operate continuously at that level. POPA991IDBVR's 40 V maximum supply voltage means it can be connected directly to a regulated automotive rail without an additional voltage clamp or pre-regulator, simplifying the signal chain. The automotive temperature grade qualification also covers the -40 °C to 125 °C ambient range typical of under-hood and passenger-compartment sensor circuits.
What is the input offset voltage of POPA991IDBVR, and how does it affect current sensing accuracy?
The maximum input offset voltage is 665 µV. For a current sensing application using a 10 mΩ shunt resistor measuring currents up to 10 A, the shunt voltage at full scale is 100 mV, and the 665 µV offset introduces a DC error of less than 0.7% of full-scale — acceptable for most automotive monitoring functions. At lower currents of 1 A the shunt voltage is 10 mV and the offset represents 6.65% error, so lower-offset variants or larger shunt values would be needed for high-accuracy low-current measurement.
For an automotive active low-pass filter at 100 kHz, is POPA991IDBVR's 4.5 MHz bandwidth sufficient?
Yes. With a 4.5 MHz gain-bandwidth product, a unity-gain buffer configuration has 4.5 MHz bandwidth, and a non-inverting amplifier with a gain of 10 retains 450 kHz bandwidth — still 4.5x above the 100 kHz filter cutoff, providing adequate phase margin for a Sallen-Key or multiple feedback topology. The 21 V/µs slew rate prevents amplitude limiting for sine wave signals below approximately 3.3 MHz at 1 V peak, so slew-rate distortion is not a concern at 100 kHz filter frequencies.
How does the CMRR of POPA991IDBVR protect measurements in a noisy automotive environment?
POPA991IDBVR specifies a minimum common-mode rejection ratio of 110 dB, rising to a nominal 125 dB. A 110 dB CMRR means that 1 V of common-mode noise — such as switching transients from a 12 V alternator or PWM motor drive — appears at the output as only 3.16 µV. For sensor signals of 10 mV to 100 mV, this noise contribution is negligible, eliminating the need for additional filtering in most automotive sensor front-end designs where ground-referenced interference is the dominant noise source.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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