Overview
The AD624CDZ is a high precision, low noise instrumentation amplifier designed and manufactured by Analog Devices Inc. This amplifier is primarily intended for use with low-level transducers such as load cells, strain gauges, and pressure transducers. It offers an outstanding combination of low noise, high gain accuracy, low gain temperature coefficient, and high linearity, making it ideal for high-resolution data acquisition systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Offset Voltage | 25 | µV | ||
| Input Offset Voltage Drift | 0.25 | µV/°C | ||
| Gain Range (Pin Programmable) | 1 | 1000 | ||
| Gain Error (G = 1) | ±0.05% | |||
| Gain Temperature Coefficient | 5 ppm/°C | |||
| Common Mode Rejection Ratio (CMRR) | 80 dB | 130 dB (G = 500 to 1000) | ||
| Gain Bandwidth Product | 25 MHz | |||
| Slew Rate | 5 V/µs | |||
| Settling Time | 15 µs | |||
| Operating Temperature Range | -40°C | +85°C | ||
| Power Supply Range | ±6 V | ±18 V | ||
| Quiescent Current | 3.5 mA | 5 mA |
Key Features
- Low Noise: Input noise typically less than 4 nV/√Hz at 1 kHz.
- Low Gain Temperature Coefficient: 5 ppm max (G = 1).
- High Linearity: Maximum nonlinearity of 0.001% at G = 1 to 200.
- High CMRR: Above 80 dB at unity gain and 130 dB at G = 500 to 1000.
- Pin Programmable Gains: Gains of 1, 100, 200, 500, and 1000 without external components.
- Low Input Offset Voltage: 25 µV max.
- Low Input Offset Voltage Drift: Less than 0.25 µV/°C.
- Gain Bandwidth Product: 25 MHz.
- Fast AC Performance: 5 V/µs slew rate and 15 µs settling time.
- Independent Offset Nulling: Totally independent input and output offset nulling terminals for high precision applications.
Applications
The AD624CDZ is designed for use in various high-precision applications, including:
- Data Acquisition Systems: High-resolution data acquisition systems requiring low noise and high gain accuracy.
- Transducer Interfaces: Load cells, strain gauges, and pressure transducers.
- Medical Devices: Medical equipment requiring precise signal amplification.
- Industrial Automation: High-precision measurement and control systems.
Q & A
- What is the primary application of the AD624CDZ?
The AD624CDZ is primarily used with low-level transducers such as load cells, strain gauges, and pressure transducers in high-resolution data acquisition systems.
- What are the pin-programmable gain options for the AD624CDZ?
The AD624CDZ offers pin-programmable gains of 1, 100, 200, 500, and 1000 without the need for external components.
- What is the input offset voltage of the AD624CDZ?
The input offset voltage is typically 25 µV.
- How does the AD624CDZ handle temperature drift?
The AD624CDZ has an input offset voltage drift of less than 0.25 µV/°C.
- What is the common mode rejection ratio (CMRR) of the AD624CDZ?
The CMRR is above 80 dB at unity gain and 130 dB at gains of 500 to 1000.
- What is the gain bandwidth product of the AD624CDZ?
The gain bandwidth product is 25 MHz.
- How fast is the slew rate of the AD624CDZ?
The slew rate is 5 V/µs.
- What is the settling time of the AD624CDZ?
The settling time is 15 µs.
- Can the gain of the AD624CDZ be set to any value between 1 and 10,000?
- What is the operating temperature range of the AD624CDZ?
The operating temperature range is -40°C to +85°C.
