Overview
The AD620ACHIP, produced by Analog Devices Inc., is a low-cost, high-accuracy instrumentation amplifier. It is designed to be highly versatile and efficient, making it suitable for a wide range of applications. The AD620 requires only one external resistor to set gains from 1 to 10,000, which simplifies the design process and reduces component count. It features low power consumption with a maximum supply current of 1.3 mA, making it ideal for battery-powered, portable, or remote applications. The amplifier is available in 8-lead SOIC, DIP, and CERDIP packages, offering a compact solution compared to discrete designs.
Key Specifications
| Parameter | Rating/Value |
|---|---|
| Supply Voltage | ±2.3 V to ±18 V |
| Internal Power Dissipation | 650 mW (free air) |
| Input Voltage (Common-Mode) | ±VS |
| Differential Input Voltage | 25 V |
| Output Short-Circuit Duration | Indefinite |
| Storage Temperature Range | −65°C to +150°C (Q), −65°C to +125°C (N, R) |
| Operating Temperature Range | −40°C to +85°C (A, B), −55°C to +125°C (S) |
| Lead Temperature Range (Soldering 10 seconds) | 300°C |
| Input Offset Voltage | 50 μV max |
| Input Offset Drift | 0.6 μV/°C max |
| Input Bias Current | 1.0 nA max |
| Common-Mode Rejection Ratio (G = 10) | 100 dB min |
| Input Voltage Noise | 9 nV/√Hz at 1 kHz |
| Bandwidth (G = 100) | 120 kHz |
| Settling Time to 0.01% | 15 μs |
Key Features
- Easy to use with gain set by one external resistor (gain range 1 to 10,000).
- Low power consumption with a maximum supply current of 1.3 mA, suitable for battery-powered and portable applications.
- High accuracy with 40 ppm maximum nonlinearity, low offset voltage of 50 μV max, and offset drift of 0.6 μV/°C max.
- Low noise characteristics: 9 nV/√Hz at 1 kHz, 0.28 μV p-p in the 0.1 Hz to 10 Hz band, and 0.1 pA/√Hz input current noise.
- High common-mode rejection ratio (CMRR) of 100 dB min at G = 10.
- Compact 8-lead SOIC, DIP, and CERDIP packaging.
Applications
- Precision data acquisition systems, such as weigh scales and transducer interfaces.
- Medical applications, including ECG and noninvasive blood pressure monitors.
- Industrial process controls and battery-powered equipment.
- Multiplexed applications due to its fast settling time of 15 μs to 0.01%.
Q & A
- What is the gain range of the AD620?
The AD620 can be set to gains ranging from 1 to 10,000 using a single external resistor.
- What is the maximum supply current of the AD620?
The maximum supply current of the AD620 is 1.3 mA.
- What are the typical packaging options for the AD620?
The AD620 is available in 8-lead SOIC, DIP, and CERDIP packages.
- What is the common-mode rejection ratio (CMRR) of the AD620?
The CMRR of the AD620 is 100 dB min at a gain of 10.
- What are some common applications of the AD620?
The AD620 is commonly used in precision data acquisition systems, medical applications, industrial process controls, and battery-powered equipment.
- What is the input offset voltage of the AD620?
The input offset voltage of the AD620 is 50 μV max.
- What is the input bias current of the AD620?
The input bias current of the AD620 is 1.0 nA max.
- What is the bandwidth of the AD620 at a gain of 100?
The bandwidth of the AD620 at a gain of 100 is 120 kHz.
- What is the settling time of the AD620 to 0.01%?
The settling time of the AD620 to 0.01% is 15 μs.
- Is the AD620 suitable for multiplexed applications?
Yes, the AD620 is well-suited for multiplexed applications due to its fast settling time.
