Overview
The ADA4661-2ACPZ-R7 is a dual, precision, rail-to-rail input/output operational amplifier produced by Analog Devices Inc. This amplifier is optimized for low power consumption, high bandwidth, and a wide operating supply voltage range. It is designed to operate with single-ended supplies of 3.3 V, 5 V, 10 V, 12 V, and 15 V, as well as dual supplies of ±2.5 V, ±3.3 V, and ±5 V. The ADA4661-2 utilizes Analog Devices' patented DigiTrim® trimming technique, which ensures low offset voltage and excellent power supply rejection, common-mode rejection, and offset voltage stability across a broad common-mode voltage range.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | 30 | 150 | 150 | µV | VCM = 1.5 V to 16.5 V, TA = 25°C |
| Offset Voltage Drift | ΔVOS/ΔT | - | - | 1 | µV/°C | - |
| Input Resistance (Differential Mode) | RINDM | - | - | >10 GΩ | - | - |
| Input Capacitance (Differential Mode) | CINDM | - | - | 8.5 | pF | - |
| Output Voltage High | VOH | 17.95 | 17.97 | 17.97 | V | RL = 10 kΩ to VCM, TA = 25°C |
| Output Voltage Low | VOL | 14 | 25 | 25 | mV | RL = 10 kΩ to VCM, TA = 25°C |
| Continuous Output Current | IOUT | - | - | 40 | mA | Dropout voltage = 1 V |
| Power Supply Rejection Ratio | PSRR | 120 | 145 | 145 | dB | VSY = 3.0 V to 18 V, TA = 25°C |
| Supply Current per Amplifier | ISY | 620 | 725 | 725 | µA | IOUT = 0 mA, TA = 25°C |
| Slew Rate | SR | - | - | 1.8 | V/µs | RS = 1 kΩ, RL = 10 kΩ, CL = 10 pF, AV = 1 |
Key Features
- Low Offset Voltage: Maximum of 60 µV at 25°C, ensuring high precision in signal amplification.
- Low Offset Voltage Drift: Maximum of 1 µV/°C, providing stability over a wide temperature range.
- Rail-to-Rail Input/Output: Allows the amplifier to operate with input and output signals that range from the negative to the positive supply rail.
- High Power Supply Rejection Ratio (PSRR): Up to 145 dB, minimizing the impact of power supply noise on the output signal.
- High Common-Mode Rejection Ratio (CMRR): Ensures that the amplifier rejects common-mode signals effectively.
- Low Power Consumption: Supply current per amplifier is typically 725 µA, making it suitable for low-power applications.
- High Bandwidth and Slew Rate: Slew rate of 1.8 V/µs and bandwidth of up to 4 MHz, enabling fast and accurate signal amplification).
- Wide Operating Temperature Range: Specified over the extended industrial temperature range of −40°C to +125°C).
Applications
- Industrial Automation: Suitable for signal conditioning in industrial control systems, sensors, and actuators.
- Medical Devices: Used in medical equipment for precise signal amplification and conditioning.
- Aerospace and Defense: Applied in various military and aerospace applications requiring high precision and reliability.
- Instrumentation and Measurement: Ideal for use in measurement instruments, data acquisition systems, and test equipment.
- Consumer Electronics: Used in audio and video equipment, as well as other consumer electronic devices requiring high-quality signal amplification.
Q & A
- What is the typical offset voltage of the ADA4661-2?
The typical offset voltage of the ADA4661-2 is 150 µV at 25°C.
- What is the operating temperature range of the ADA4661-2?
The ADA4661-2 is specified over the extended industrial temperature range of −40°C to +125°C).
- 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 power supply rejection ratio (PSRR) of the ADA4661-2?
The PSRR of the ADA4661-2 is up to 145 dB).
- What is the slew rate of the ADA4661-2?
The slew rate of the ADA4661-2 is 1.8 V/µs).
- What is the typical supply current per amplifier for the ADA4661-2?
The typical supply current per amplifier is 725 µA).
- Can the ADA4661-2 operate with single-ended supplies?
Yes, the ADA4661-2 can operate with single-ended supplies of 3.3 V, 5 V, 10 V, 12 V, and 15 V).
- What is the common-mode rejection ratio (CMRR) of the ADA4661-2?
The CMRR of the ADA4661-2 ensures that the amplifier rejects common-mode signals effectively, though specific values are not provided in the datasheet).
- Is the ADA4661-2 suitable for high-frequency applications?
Yes, the ADA4661-2 has a bandwidth of up to 4 MHz and a slew rate of 1.8 V/µs, making it suitable for high-frequency applications).
- What is the input resistance of the ADA4661-2 in differential mode?
The input resistance in differential mode is greater than 10 GΩ).
