Overview
The AD8224ACPZ-R7, produced by Analog Devices Inc., is a precision, dual-channel, JFET input, rail-to-rail instrumentation amplifier. It is the first single-supply instrumentation amplifier available in a space-saving 16-lead, 4 mm x 4 mm LFCSP package. This device is designed to meet the needs of high-performance, portable instrumentation, offering a compact solution that doubles the channel density without compromising performance.
The AD8224 is versatile and can operate on a single +5 V supply or a ±18 V dual supply, making it ideal for battery-powered devices and applications requiring low power consumption. Its rail-to-rail output stage maximizes dynamic range on low voltage supplies, and it can be configured as a single-channel, differential output instrumentation amplifier for high noise immunity.
Key Specifications
| Specification | Value |
|---|---|
| Package | 16-Lead LFCSP (4mm x 4mm w/ EP) |
| Number of Channels | 2 |
| Input Bias Current | 10 pA (maximum), 25 pA (typical) |
| Input Offset Voltage (Vos) | 300 µV |
| Common Mode Rejection Ratio (CMRR) | 86 dB (minimum at dc), 80 dB (minimum at 10 kHz, G = 1) |
| Bandwidth | 1.5 MHz (G = 1) |
| Input Noise | 14 nV/√Hz (at 1 kHz) |
| Slew Rate | 2 V/µs |
| Quiescent Current per Amplifier | 750 µA |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage Range | 4.5 V to 36 V, ±2.25 V to ±18 V |
Key Features
- Dual-Channel Configuration: Offers two channels in a single, compact package, doubling the channel density without increasing board area.
- JFET Input: Features low input bias currents (maximum 10 pA) and high input impedance, making it suitable for high-precision applications.
- Rail-to-Rail Output: Maximizes dynamic range on low voltage supplies, ideal for portable and battery-powered devices.
- Single-Supply Operation: Can operate on a single +5 V supply or a ±18 V dual supply, enhancing versatility in various applications.
- High CMRR and Low Noise: Provides a minimum CMRR of 86 dB and low input noise of 14 nV/√Hz at 1 kHz, ensuring high signal integrity.
- Differential Output Configuration: Can be configured as a single-channel, differential output instrumentation amplifier for high noise immunity and to drive differential input ADCs.
Applications
- Medical Instrumentation: Suitable for precision medical devices requiring high signal integrity and low noise.
- Precision Data Acquisition: Ideal for high-precision data acquisition systems where low noise and high CMRR are critical.
- Transducer Interfaces: Used in transducer interfaces to amplify low-level signals while maintaining high accuracy and low noise.
- Differential Drives for ADCs: Configurable to drive differential input ADCs, enhancing the overall system's noise immunity and signal quality.
- Remote Sensors: Suitable for remote sensor applications where signal integrity and noise immunity are essential.
Q & A
- What is the package type of the AD8224ACPZ-R7?
The AD8224ACPZ-R7 comes in a 16-lead LFCSP (4mm x 4mm w/ EP) package.
- How many channels does the AD8224ACPZ-R7 have?
The AD8224ACPZ-R7 is a dual-channel instrumentation amplifier.
- What is the input bias current of the AD8224ACPZ-R7?
The input bias current is a maximum of 10 pA and typically remains below 300 pA over the entire industrial temperature range.
- What is the common-mode rejection ratio (CMRR) of the AD8224ACPZ-R7?
The CMRR is a minimum of 86 dB at dc and 80 dB at 10 kHz for G = 1.
- What is the bandwidth of the AD8224ACPZ-R7?
The bandwidth is 1.5 MHz for a gain of 1.
- What is the slew rate of the AD8224ACPZ-R7?
The slew rate is 2 V/µs.
- What is the quiescent current per amplifier for the AD8224ACPZ-R7?
The quiescent current per amplifier is 750 µA.
- What are the operating temperature and supply voltage ranges for the AD8224ACPZ-R7?
The operating temperature range is -40°C to 85°C, and the supply voltage range is 4.5 V to 36 V, or ±2.25 V to ±18 V.
- Can the AD8224ACPZ-R7 be configured as a single-channel, differential output instrumentation amplifier?
Yes, it can be configured as a single-channel, differential output instrumentation amplifier for high noise immunity and to drive differential input ADCs.
- What are some typical applications of the AD8224ACPZ-R7?
Typical applications include medical instrumentation, precision data acquisition, transducer interfaces, differential drives for high-resolution input ADCs, and remote sensors.
