Overview
The AD8221ARMZ is a precision instrumentation amplifier designed by Analog Devices Inc. This device is known for its high performance and versatility, making it an excellent choice for various applications that demand high DC performance and low noise.
The AD8221ARMZ operates with a wide power supply range of ±2.3 V to ±18 V and is specified over the industrial temperature range of −40°C to +85°C, with operational capabilities up to 125°C. It features a gain programmable architecture, allowing the gain to be set with a single external resistor over a range of 1 to 1000.
This amplifier is available in an 8-lead MSOP package, which is particularly useful for space-constrained and multichannel applications due to its compact size.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Supply Operating Range | ±2.3 | ±18 | V | |
| Quiescent Current | 0.9 | 1 | 1.2 | mA |
| Temperature Range for Specified Performance | −40 | +85 | °C | |
| Operational Temperature Range | −40 | +125 | °C | |
| CMRR (G = 1, to 10 kHz) | 80 | dB | ||
| Bandwidth (G = 1, −3 dB) | 825 | kHz | ||
| Slew Rate | 2 | V/µs | ||
| Input Offset Voltage | 25 | µV | ||
| Input Offset Drift | 0.3 | µV/°C | ||
| Input Bias Current | 0.5 | 2 | 3 | nA |
Key Features
- Gain programmable with a single external resistor (gain range 1 to 1000)
- Wide power supply range: ±2.3 V to ±18 V
- High CMRR of 80 dB to 10 kHz (G = 1), excellent for rejecting wideband interference and line harmonics
- Operational up to 125°C, with specified performance over −40°C to +85°C
- Available in space-saving 8-lead MSOP package, ideal for multichannel or space-constrained applications
- Low noise: 8 nV/√Hz at 1 kHz, and 0.25 µV p-p input noise (0.1 Hz to 10 Hz)
- High accuracy DC performance: low voltage offset, low offset drift, and low gain drift
Applications
- Weigh scales
- Industrial process controls
- Bridge amplifiers
- Precision data acquisition systems
- Medical instrumentation
- Strain gages and transducer interfaces
- Biomedical analysis and aerospace instrumentation
Q & A
- What is the gain range of the AD8221ARMZ?
The gain of the AD8221ARMZ can be set with a single external resistor over a range of 1 to 1000.
- What is the power supply range for the AD8221ARMZ?
The AD8221ARMZ operates with a power supply range of ±2.3 V to ±18 V.
- What is the temperature range for specified performance of the AD8221ARMZ?
The specified performance temperature range is −40°C to +85°C, with operational capabilities up to 125°C.
- What is the CMRR of the AD8221ARMZ at G = 1?
The AD8221ARMZ has a minimum CMRR of 80 dB to 10 kHz at G = 1.
- What package options are available for the AD8221ARMZ?
The AD8221ARMZ is available in an 8-lead MSOP package.
- What are some typical applications of the AD8221ARMZ?
Typical applications include weigh scales, industrial process controls, bridge amplifiers, precision data acquisition systems, medical instrumentation, strain gages, and transducer interfaces.
- How does the AD8221ARMZ handle noise?
The AD8221ARMZ has low noise characteristics, with 8 nV/√Hz at 1 kHz and 0.25 µV p-p input noise (0.1 Hz to 10 Hz).
- What is the slew rate of the AD8221ARMZ?
The slew rate of the AD8221ARMZ is 2 V/µs.
- Is the AD8221ARMZ suitable for aerospace applications?
Yes, the AD8221-EP version supports defense and aerospace applications with a military temperature range and enhanced product change notification.
- How does the AD8221ARMZ handle input offset voltage and drift?
The AD8221ARMZ has a low input offset voltage of 25 µV and a low input offset drift of 0.3 µV/°C.
