Overview
The AD8429BRZ-R7 is an ultralow noise instrumentation amplifier designed by Analog Devices Inc. This amplifier is optimized for measuring extremely small signals over a wide temperature range of −40°C to +125°C. It features a current feedback architecture that provides high bandwidth and excellent distortion performance, making it suitable for demanding applications such as vibration analysis and medical instrumentation.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Product Category | Instrumentation Amplifiers |
| Package Type | SOIC-8 |
| Input Noise | 1 nV/√Hz |
| Output Noise | 45 nV/√Hz |
| CMRR (G = 1) | 90 dB |
| Input Offset Voltage | 50 μV maximum |
| Gain Accuracy (G = 1) | 0.02% maximum |
| Bandwidth (G = 1) | 15 MHz |
| Bandwidth (G = 100) | 1.2 MHz |
| Slew Rate | 22 V/μs |
| THD (1 kHz, G = 1) | −130 dBc |
| Dual Supply Voltage | ±4 V to ±18 V |
| Temperature Range | −40°C to +125°C |
| Pins | 8 |
| RoHS Compliance | Yes |
Key Features
- Ultralow input noise of 1 nV/√Hz and output noise of 45 nV/√Hz.
- High accuracy DC performance with 90 dB CMRR minimum at G = 1 and 50 μV maximum input offset voltage.
- Excellent AC specifications, including 15 MHz bandwidth at G = 1 and 1.2 MHz bandwidth at G = 100.
- High slew rate of 22 V/μs and low THD of −130 dBc at 1 kHz, G = 1.
- Gain settable from 1 to 10,000 with a single resistor.
- A reference pin to offset the output voltage, useful for single-supply signal chains.
- Current feedback architecture for high bandwidth at high gain.
- Circuitry to improve settling time after large input voltage transients.
Applications
- Medical instrumentation: Ideal for precise signal measurement in medical devices.
- Precision data acquisition: Suitable for high-accuracy data acquisition systems.
- Microphone preamplification: Excellent for amplifying low-level audio signals.
- Vibration analysis: Used in applications requiring the measurement of fast-changing signals.
Q & A
- What is the input noise of the AD8429BRZ-R7?
The AD8429BRZ-R7 has an ultralow input noise of 1 nV/√Hz.
- What is the CMRR of the AD8429BRZ-R7 at G = 1?
The CMRR at G = 1 is 90 dB.
- What is the bandwidth of the AD8429BRZ-R7 at G = 1 and G = 100?
The bandwidth is 15 MHz at G = 1 and 1.2 MHz at G = 100.
- What is the slew rate of the AD8429BRZ-R7?
The slew rate is 22 V/μs.
- What is the temperature range for specified performance of the AD8429BRZ-R7?
The temperature range is −40°C to +125°C.
- How is the gain set for the AD8429BRZ-R7?
The gain is settable from 1 to 10,000 with a single resistor.
- What is the purpose of the reference pin on the AD8429BRZ-R7?
The reference pin allows the user to offset the output voltage, which is useful when interfacing to a single-supply signal chain.
- What are some typical applications of the AD8429BRZ-R7?
Typical applications include medical instrumentation, precision data acquisition, microphone preamplification, and vibration analysis.
- What package type is the AD8429BRZ-R7 available in?
The AD8429BRZ-R7 is available in an 8-lead plastic SOIC package.
- Is the AD8429BRZ-R7 RoHS compliant?
Yes, the AD8429BRZ-R7 is RoHS compliant.
