Analog Devices launched new a high voltage, low noise, zero drift op amp ADA4523-1 that offers precision dc performance over a wide supply range of 4.5 V to 36 V. Offset voltage and 1/f noise are suppressed, allowing this op amp to achieve a maximum offset voltage of ±4 μV and a 0.1 Hz to 10 Hz input noise voltage of 88 nV p-p typical. The self calibrating circuitry of the ADA4523-1 results in low offset voltage drift with temperature (0.01 μV/°C maximum) and zero drift over time. Additionally, the ADA4523-1 uses on-chip filtering to achieve high immunity to electromagnetic interference (EMI).
Wide supply range, combined with low noise, low offset, 168 dB power supply rejection ratio (PSRR), and 160 dB common-mode rejection ratio (CMRR), make the ADA4523-1 well suited for high dynamic range test, measurement, and instrumentation systems.
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| Input-Referred Voltage Noise Density vs. Frequency, Zero Drift Amplifier Family Comparison. |
The ADA4523-1 provides a rail-to-rail output swing and an input common-mode range that includes the V– rail (V– – 0.1 V to V+ – 1.5 V).
Features
- Supply voltage range: 4.5 V to 36 V
- Offset voltage: ±4 μV maximum at 5 V
- Offset voltage drift: 0.01 μV/°C maximum at 5 V
- Input noise
- Voltage: 88 nV p-p from 0.1 Hz to 10 Hz typical
- Spectral density voltage: 4.2 nV/√Hz typical at 1 kHz
- Rail-to-rail output
- Unity-gain stable
- GBP: 5 MHz typical
- Slew rate: 1.8 V/μs typical falling
- PSRR: 168 dB typical at VS = 4.5 V to 36 V
- Open-loop voltage gain: 160 dB typical at VOUT = –14.75 V to +14.75 V, RL = 10 kΩ, VS = 30 V
- CMRR: 160 dB typical at VCM = –15.1 V to +13.5 V, VS = 30 V
- Integrated EMI filters
- Shutdown mode
- Ground sense
- Available in 8-lead SOIC, 8-lead MSOP, and 8-lead LFCSP
Applications
- High resolution data acquisition
- Reference buffering
- Test and measurement
- Electronic scales
- Thermocouple amplifiers
- Strain gages
- Low-side current sense
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| Full Featured Evaluation Board for the ADA4523-1. |
