Overview
The AD8220WARMZ, produced by Analog Devices Inc., is a high-performance, single-supply, JFET input instrumentation amplifier. It is designed to meet the needs of portable instrumentation and is available in an 8-lead MSOP package. This amplifier is notable for its excellent ac specifications, low power consumption, and versatility in various applications. The AD8220WARMZ can operate on a single supply from 4.5 V to 36 V or on a dual supply from ±2.25 V to ±18 V, making it suitable for a wide range of power supply configurations. Its rail-to-rail output stage maximizes dynamic range, especially in low-voltage supplies common in portable devices.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Common-Mode Rejection Ratio (CMRR) | 80 dB (G = 1, 5 kHz) | - | - | dB |
| Input Bias Current | 25 pA | - | 100 nA (over temperature) | pA |
| Input Offset Current | 2 pA | - | 10 nA (over temperature) | pA |
| Bandwidth | 1.5 MHz (G = 1) | - | - | kHz |
| Input Noise | 14 nV/√Hz (1 kHz) | - | - | nV/√Hz |
| Slew Rate | 2 V/μs | - | - | V/μs |
| Quiescent Supply Current | - | - | 750 μA | μA |
| Operating Temperature Range | -40°C to +125°C (W grade) | - | - | °C |
| ESD Protection | - | - | 4 kV | V |
Key Features
- High CMRR: Minimum CMRR of 86 dB at DC and 80 dB at 5 kHz for G = 1.
- Low Input Currents: Maximum input bias current of 10 pA and input offset current of 2 pA.
- Versatile Supply Options: Operates on a single supply from 4.5 V to 36 V or on a dual supply from ±2.25 V to ±18 V.
- Rail-to-Rail Output: Maximizes dynamic range on low voltage supplies.
- Gain Setting: Gain can be set from 1 to 1000 with a single resistor.
- Reference Pin: Allows the user to offset the output voltage, useful for interfacing with analog-to-digital converters.
- Compact Package: Available in an 8-lead MSOP package, taking roughly half the board area of an SOIC.
- ESD Protection: 4 kV ESD protection.[
Applications
- Medical Instrumentation: Suitable for high-precision medical devices.[
- Precision Data Acquisition: Ideal for applications requiring high accuracy and low noise.[
- Transducer Interfaces: Used in interfacing with various transducers due to its high CMRR and low input currents.[
- Automotive Applications: Qualified for automotive use with a temperature range of −40°C to +125°C (W grade).[
- Defense and Aerospace Applications: Supports defense and aerospace applications with enhanced product features (AD8220-EP).[
Q & A
- What is the typical input bias current of the AD8220WARMZ?
The typical input bias current is 25 pA, and it remains below 300 pA over the entire industrial temperature range.
- What is the bandwidth of the AD8220WARMZ at a gain of 1?
The bandwidth at a gain of 1 is 1.5 MHz.
- How is the gain set in the AD8220WARMZ?
The gain can be set from 1 to 1000 using a single resistor across the RG pins.
- What is the operating temperature range for the W grade of the AD8220WARMZ?
The operating temperature range for the W grade is −40°C to +125°C.[
- Does the AD8220WARMZ have ESD protection?
Yes, it has 4 kV ESD protection.[
- What are the supply voltage options for the AD8220WARMZ?
The AD8220WARMZ can operate on a single supply from 4.5 V to 36 V or on a dual supply from ±2.25 V to ±18 V.[
- What is the quiescent supply current of the AD8220WARMZ?
The maximum quiescent supply current is 750 μA.[
- Is the AD8220WARMZ suitable for battery-powered devices?
Yes, it is ideal for battery-powered devices due to its low quiescent supply current.[
- What is the slew rate of the AD8220WARMZ?
The slew rate is 2 V/μs.[
- Does the AD8220WARMZ have a reference pin for output voltage offset?
Yes, it has a reference pin that allows the user to offset the output voltage, which is useful for interfacing with analog-to-digital converters.[
