Overview
The OPA4991-Q1, produced by Texas Instruments, is a high-performance, quad-channel operational amplifier designed specifically for automotive applications. This device is part of the OPAx991-Q1 family, which includes the OPA991-Q1 and OPA2991-Q1. It offers exceptional DC precision and AC performance, making it suitable for a wide range of high-voltage automotive uses. The OPA4991-Q1 is AEC-Q100 qualified, ensuring it meets stringent automotive standards, and operates over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (PW), SOT-23 (DYY), SOIC (D) |
| Pins | 14 |
| Operating Temperature Range | –40°C to +125°C |
| Supply Voltage | ±1.35V to ±20V, 2.7V to 40V |
| Offset Voltage | ±125µV (typical) |
| Offset Voltage Drift | ±0.3µV/°C (typical) |
| Noise | 10.8nV/√Hz at 1kHz |
| Common-Mode Rejection Ratio | 130dB |
| Bias Current | ±10pA |
| Bandwidth | 4.5MHz GBW |
| Slew Rate | 21V/µs |
| Output Current | ±75mA |
| Capacitive Load Drive | 1nF |
| Quiescent Current | 560µA per amplifier |
Key Features
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C
- Device HBM ESD classification level 2A and CDM ESD classification level C6
- Rail-to-rail input and output
- Low offset voltage and drift
- Low noise and high common-mode rejection ratio
- High slew rate and capacitive load drive
- MUX-friendly/comparator inputs
- Low quiescent current
- Wide supply voltage range
Applications
- Infotainment and cluster systems
- Passive safety systems
- Body electronics and lighting
- HEV/EV inverter and motor control
- On-board (OBC) and wireless charger systems
- Powertrain current sensing
- Advanced driver assistance systems (ADAS)
- High-side current sensing
Q & A
- What is the operating temperature range of the OPA4991-Q1? The operating temperature range is –40°C to +125°C.
- What is the supply voltage range for the OPA4991-Q1? The supply voltage range is ±1.35V to ±20V, and 2.7V to 40V.
- What is the typical offset voltage of the OPA4991-Q1? The typical offset voltage is ±125µV.
- What is the slew rate of the OPA4991-Q1? The slew rate is 21V/µs.
- Can the OPA4991-Q1 drive high capacitive loads? Yes, it can drive up to 1nF capacitive loads.
- Is the OPA4991-Q1 AEC-Q100 qualified? Yes, it is AEC-Q100 qualified for automotive applications.
- What are the common applications of the OPA4991-Q1? Common applications include infotainment systems, passive safety systems, body electronics, and advanced driver assistance systems (ADAS).
- What is the bandwidth of the OPA4991-Q1? The bandwidth is 4.5MHz GBW.
- What is the quiescent current per amplifier for the OPA4991-Q1? The quiescent current per amplifier is 560µA.
- Can the OPA4991-Q1 be used as a comparator? Yes, it can be used in open-loop or as a comparator.
