Overview
The AD8244ARMZ is a precision FET input quad buffer amplifier manufactured by Analog Devices Inc. This component is designed for low power consumption and high precision, making it suitable for a variety of applications requiring accurate signal buffering. The AD8244ARMZ features a unique pinout that separates high impedance inputs from low impedance supplies and outputs, reducing the need for guard traces and minimizing board space. It operates over a wide supply range, from 3V to 36V for single-supply and ±1.5V to ±18V for dual-supply configurations, and is specified over the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Typical | Maximum | Unit |
|---|---|---|---|
| Supply Current per Amplifier | 250 | - | µA |
| Input Bias Current at 25°C | 0.5 | 2 | pA |
| Offset Voltage at +VS=5V, –VS=0V, TA=25°C, VIN=0.2V, RL=10kΩ | 100 | 600 | µV |
| Average Temperature Coefficient | - | 10 | µV/°C |
| Voltage Noise at 1 kHz | 13 | - | nV/√Hz |
| Current Noise at 1 kHz | 0.8 | - | fA/√Hz |
| Bandwidth | 3 | - | MHz |
| Slew Rate | 0.8 | - | V/µs |
| Supply Range (Single-Supply) | 3V to 36V | - | V |
| Supply Range (Dual-Supply) | ±1.5V to ±18V | - | V |
| Operating Temperature Range | -40°C to +85°C | - | °C |
| Package Type | 10-lead MSOP | - | - |
Key Features
- Low power consumption: 250 µA maximum supply current per amplifier.
- FET input with extremely high input impedance and low input bias current (2 pA maximum at 25°C).
- Low noise: 13 nV/√Hz voltage noise at 1 kHz and 0.8 fA/√Hz current noise at 1 kHz.
- High dc precision: 3 µV/°C maximum offset drift.
- Unique pinout that separates high impedance inputs from low impedance supplies and outputs, reducing the need for guard traces.
- Rail-to-rail output and single-supply operation with input range extending to ground.
- Wide supply range: 3 V to 36 V for single-supply and ±1.5 V to ±18 V for dual-supply configurations.
- Compact 10-lead MSOP package.
Applications
- Differential signal chains: Close channel-to-channel matching allows minimal error in differential signal applications.
- High precision instrumentation: Suitable for applications requiring low noise and high dc precision.
- Unity-gain buffering: Flexible enough to provide high performance in various unity-gain buffer applications.
- Low source resistance applications: Performs well even with low source resistance.
- Space-constrained designs: Compact MSOP package and unique pinout simplify design and reduce board space.
Q & A
- What is the maximum supply current per amplifier for the AD8244ARMZ?
250 µA.
- What is the input bias current at 25°C for the AD8244ARMZ?
2 pA maximum.
- What is the typical offset voltage for the AD8244ARMZ at +VS=5V, –VS=0V, TA=25°C, VIN=0.2V, RL=10kΩ?
100 µV.
- What is the bandwidth of the AD8244ARMZ?
3 MHz.
- What is the slew rate of the AD8244ARMZ?
0.8 V/µs.
- What is the operating temperature range for the AD8244ARMZ?
-40°C to +85°C.
- What is the package type of the AD8244ARMZ?
10-lead MSOP.
- What are the supply voltage ranges for the AD8244ARMZ?
Single-supply: 3 V to 36 V, Dual-supply: ±1.5 V to ±18 V.
- Does the AD8244ARMZ have rail-to-rail output capability?
Yes, it has rail-to-rail output capability.
- What are some common applications for the AD8244ARMZ?
Differential signal chains, high precision instrumentation, unity-gain buffering, and space-constrained designs.
