Overview
The ADA4661-2ARMZ-RL, produced by Analog Devices Inc., is a dual, precision, rail-to-rail input/output operational amplifier. This amplifier is optimized for low power consumption, high bandwidth, and a wide operating supply voltage range. It is particularly suited for applications requiring high accuracy and low noise. The ADA4661-2 uses Analog Devices' patented DigiTrim® trimming technique, which ensures low offset voltage and excellent power supply rejection and common-mode rejection ratios. The amplifier is available in 8-lead MSOP and 8-lead LFCSP (3 mm × 3 mm) packages and operates over an extended industrial temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage | Vos | 30 | µV | ||
| Input Bias Current | Ib | 15 | pA | ||
| Gain Bandwidth Product | GBP | 4 | MHz | ||
| Slew Rate | SR | 2 | V/µs | ||
| Supply Voltage Range (Single Supply) | VSY | 3 | 18 | V | |
| Supply Voltage Range (Dual Supply) | VSY | ±1.5 | ±9 | V | |
| Supply Current per Amplifier | ISY | 620 | 725 | 975 | µA |
| Output Current | IOUT | 40 | mA | ||
| Power Supply Rejection Ratio | PSRR | 120 | 145 | dB | |
| Common Mode Rejection Ratio | CMRR | 135 | dB | ||
| Operating Temperature Range | TA | -40 | +125 | °C |
Key Features
- Rail-to-Rail Input/Output: The ADA4661-2 operates with rail-to-rail input and output, allowing it to handle signals that range from the negative to the positive supply rail.
- Low Power Consumption: The amplifier has a low supply current of 620 µA to 975 µA per amplifier, making it suitable for battery-powered and power-sensitive applications.
- High Bandwidth and Slew Rate: With a gain bandwidth product of 4 MHz and a slew rate of 2 V/µs, this amplifier is capable of handling high-frequency signals.
- Excellent Rejection Ratios: It features high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR), ensuring minimal interference from power supply noise and common-mode signals.
- Low Noise and Offset Voltage: The amplifier has a low input offset voltage of 30 µV and low noise characteristics, making it ideal for precision applications.
- Wide Operating Supply Voltage Range: It can operate with single supplies from 3 V to 18 V and dual supplies from ±1.5 V to ±9 V, offering flexibility in various application scenarios.
Applications
- Current Shunt Monitors: The ADA4661-2 is suitable for current sensing applications due to its high accuracy and low noise characteristics.
- Active Filters: Its high bandwidth and low distortion make it an excellent choice for active filter designs.
- Portable Medical Equipment: The low power consumption and high precision of the ADA4661-2 make it ideal for portable medical devices.
- Buffer/Level Shifting: It can be used as a buffer or for level shifting in various signal processing applications.
- High Impedance Sensor Interfaces: The amplifier's high input impedance and low noise make it suitable for interfacing with high impedance sensors.
- Battery Powered Instrumentation: Its low power consumption makes it a good fit for battery-powered instrumentation and measurement devices.
Q & A
- What is the input offset voltage of the ADA4661-2?
The input offset voltage of the ADA4661-2 is typically 30 µV.
- What is the gain bandwidth product of the ADA4661-2?
The gain bandwidth product of the ADA4661-2 is 4 MHz.
- What is the slew rate of the ADA4661-2?
The slew rate of the ADA4661-2 is 2 V/µs.
- What is the operating supply voltage range for the ADA4661-2?
The ADA4661-2 can operate with single supplies from 3 V to 18 V and dual supplies from ±1.5 V to ±9 V.
- What is the power supply rejection ratio (PSRR) of the ADA4661-2?
The PSRR of the ADA4661-2 is typically 145 dB.
- What is the common-mode rejection ratio (CMRR) of the ADA4661-2?
The CMRR of the ADA4661-2 is typically 135 dB.
- What are the typical applications of the ADA4661-2?
The ADA4661-2 is typically used in current shunt monitors, active filters, portable medical equipment, buffer/level shifting, high impedance sensor interfaces, and battery-powered instrumentation.
- What are the available package types for the ADA4661-2?
The ADA4661-2 is available in 8-lead MSOP and 8-lead LFCSP (3 mm × 3 mm) packages.
- What is the operating temperature range of the ADA4661-2?
The operating temperature range of the ADA4661-2 is from −40°C to +125°C.
- What is the typical supply current per amplifier for the ADA4661-2?
The typical supply current per amplifier for the ADA4661-2 is 725 µA.
