Overview
The ADA4940-1ACPZ-R2 is a low noise, low distortion differential amplifier produced by Analog Devices Inc. It is designed to drive low power, high resolution analog-to-digital converters (ADCs) with resolutions up to 16 bits. This amplifier is particularly suited for applications requiring high performance and low power consumption, operating on only 1.25 mA of quiescent current. The ADA4940-1 features an adjustable output common-mode voltage, allowing it to match the input common-mode voltage of various ADCs, and an internal common-mode feedback loop that ensures exceptional output balance and suppression of even-order harmonic distortion products.
Key Specifications
| Parameter | Value |
|---|---|
| Package | LFCSP-16 (3x3 mm) |
| Supply Voltage Range | +/-2.375V to +/-3.15V (3 V to 7 V) |
| Bandwidth | 500 MHz |
| Slew Rate | 95 V/μs |
| Input Offset Voltage | 0.35 mV (max) |
| Input Bias Current | 1.1 μA (max) |
| Operating Temperature Range | -40°C to +125°C |
| Common Mode Rejection Ratio (CMRR) | 86 dB |
| Power Supply Rejection Ratio (PSRR) | 96 dB |
| Settling Time | 34 ns |
| Quiescent Current | 1.25 mA |
Key Features
- Low noise and low distortion, making it ideal for high-resolution ADC drivers.
- Adjustable output common-mode voltage to match the input common-mode voltage of multiple ADCs.
- Internal common-mode feedback loop for exceptional output balance and suppression of even-order harmonic distortion.
- Low power consumption of 1.25 mA quiescent current.
- Rail-to-rail output with a voltage swing from -VS + 0.1 V to +VS - 0.1 V.
- Flexible power supplies: 3 V to 7 V.
- Disable pin to reduce power consumption.
- High gain bandwidth product of 260 MHz.
Applications
- Low power PulSAR®/SAR ADC drivers.
- Single-ended-to-differential conversion.
- Differential buffers.
- Line drivers.
- Medical imaging.
- Industrial process controls.
- Portable electronics.
- Data acquisition and signal processing applications.
Q & A
- What is the primary function of the ADA4940-1ACPZ-R2?
The ADA4940-1ACPZ-R2 is a differential amplifier designed to drive low power, high resolution analog-to-digital converters (ADCs) with resolutions up to 16 bits.
- What is the quiescent current of the ADA4940-1ACPZ-R2?
The quiescent current of the ADA4940-1ACPZ-R2 is 1.25 mA.
- What is the operating temperature range of the ADA4940-1ACPZ-R2?
The operating temperature range is -40°C to +125°C.
- What is the common-mode rejection ratio (CMRR) of the ADA4940-1ACPZ-R2?
The CMRR is 86 dB.
- What is the slew rate of the ADA4940-1ACPZ-R2?
The slew rate is 95 V/μs.
- What is the input offset voltage of the ADA4940-1ACPZ-R2?
The input offset voltage is 0.35 mV (max).
- Can the ADA4940-1ACPZ-R2 be used in medical imaging applications?
Yes, it can be used in medical imaging applications due to its low noise and high performance characteristics.
- What is the gain bandwidth product of the ADA4940-1ACPZ-R2?
The gain bandwidth product is 260 MHz.
- Does the ADA4940-1ACPZ-R2 have a disable feature to reduce power consumption?
Yes, it has a disable pin to reduce power consumption.
- What type of package is the ADA4940-1ACPZ-R2 available in?
The ADA4940-1ACPZ-R2 is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP package.
