Overview
The AD620SQ/883B, produced by Analog Devices Inc., is a low-cost, high-accuracy instrumentation amplifier. It is designed to offer superior performance with minimal external components, requiring only one external resistor to set gains from 1 to 10,000. This amplifier is available in 8-lead CERDIP packaging and is known for its low power consumption, with a maximum supply current of 1.3 mA. The AD620SQ/883B is well-suited for battery-powered and portable applications due to its compact size and low power requirements.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage | 50 μV | |||
| Input Offset Drift | 0.6 μV/°C | |||
| Input Bias Current | 1.0 nA | |||
| Common-Mode Rejection Ratio (G = 10) | 90 | 110 | dB | |
| Input Voltage Noise @ 1 kHz | 9 nV/√Hz | |||
| Bandwidth (G = 100) | 120 kHz | |||
| Settling Time to 0.01% | 15 μs | |||
| Supply Voltage Range | ±2.3 V | ±18 V | ||
| Quiescent Current | 0.9 mA | 1.3 mA | ||
| Operating Temperature Range | −55°C | +125°C |
Key Features
- Gain set with one external resistor (gain range 1 to 10,000)
- Wide power supply range (±2.3 V to ±18 V)
- Higher performance than three op-amp IA designs
- Available in 8-lead DIP and SOIC packaging
- Low power consumption (max 1.3 mA supply current)
- Low noise: 9 nV/√Hz @ 1 kHz, 0.28 μV p-p noise (0.1 Hz to 10 Hz)
- Excellent DC performance: 50 μV max input offset voltage, 0.6 μV/°C max input offset drift, 1.0 nA max input bias current
- Excellent AC specifications: 120 kHz bandwidth (G = 100), 15 μs settling time to 0.01%
- High common-mode rejection ratio (100 dB min at G = 10)
Applications
- Weigh scales
- ECG and medical instrumentation
- Transducer interface
- Data acquisition systems
- Industrial process controls
- Battery-powered and portable equipment
Q & A
- What is the gain range of the AD620SQ/883B?
The gain range of the AD620SQ/883B is from 1 to 10,000, set by a single external resistor.
- What are the available packaging options for the AD620SQ/883B?
The AD620SQ/883B is available in 8-lead CERDIP packaging.
- What is the maximum supply current of the AD620SQ/883B?
The maximum supply current is 1.3 mA.
- What is the input offset voltage of the AD620SQ/883B?
The input offset voltage is 50 μV max.
- What is the common-mode rejection ratio of the AD620SQ/883B at a gain of 10?
The common-mode rejection ratio is 100 dB min at a gain of 10.
- What is the bandwidth of the AD620SQ/883B at a gain of 100?
The bandwidth is 120 kHz at a gain of 100.
- What is the settling time of the AD620SQ/883B to 0.01%?
The settling time is 15 μs to 0.01%.
- What are some typical applications of the AD620SQ/883B?
Typical applications include weigh scales, ECG and medical instrumentation, transducer interfaces, data acquisition systems, industrial process controls, and battery-powered equipment.
- What is the operating temperature range of the AD620SQ/883B?
The operating temperature range is −55°C to +125°C.
- What is the input voltage noise of the AD620SQ/883B at 1 kHz?
The input voltage noise is 9 nV/√Hz at 1 kHz.
