Overview
The ADA4939-2YCPZ-RL, produced by Analog Devices Inc., is a dual-channel, ultralow distortion, high-speed differential amplifier. It is designed to drive high-performance Analog-to-Digital Converters (ADCs) with resolutions up to 16 bits from DC to 100 MHz. The amplifier features a user-adjustable output common-mode voltage via an internal common-mode feedback loop, ensuring optimal matching with the ADC input. Fabricated using Analog Devices' proprietary silicon-germanium (SiGe) complementary bipolar process, the ADA4939-2 offers exceptional dynamic performance, low noise, and minimal distortion.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| −3 dB Small Signal Bandwidth | 1400 | MHz | ||
| Input Voltage Noise | 2.3 | nV/√Hz | ||
| Slew Rate | 6800 | V/μs | ||
| Offset Voltage | −3.4 | ±0.5 | +2.8 | mV |
| Input Bias Current | −26 | −10 | +2.2 | µA |
| Operating Supply Range | 3.0 | 5.25 | V | |
| Quiescent Current per Amplifier | 35.1 | 36.5 | 37.7 | mA |
| Operating Temperature Range | −40 | +105 | °C |
Key Features
- Ultralow distortion and high speed, making it ideal for driving high-performance ADCs.
- User-adjustable output common-mode voltage via an internal common-mode feedback loop.
- Low input voltage noise of 2.3 nV/√Hz and high slew rate of 6800 V/μs.
- Externally adjustable gain with differential gain configurations realized using a simple external feedback network of four resistors.
- Stable for differential gains ≥2 and supports differential-to-differential or single-ended-to-differential operation.
- Single-supply operation: 3.3 V to 5 V.
- Fast overdrive recovery of <1 ns and low dc offset.
Applications
- ADC drivers for high-performance data acquisition systems.
- Single-ended-to-differential converters.
- IF and baseband gain blocks in communication systems.
- Differential buffers and line drivers.
Q & A
- What is the primary application of the ADA4939-2YCPZ-RL?
The primary application is driving high-performance Analog-to-Digital Converters (ADCs) with resolutions up to 16 bits from DC to 100 MHz.
- What is the input voltage noise of the ADA4939-2YCPZ-RL?
The input voltage noise is 2.3 nV/√Hz.
- What is the slew rate of the ADA4939-2YCPZ-RL?
The slew rate is 6800 V/μs.
- How is the output common-mode voltage adjusted in the ADA4939-2YCPZ-RL?
The output common-mode voltage is user-adjustable via an internal common-mode feedback loop.
- What is the operating supply range of the ADA4939-2YCPZ-RL?
The operating supply range is from 3.3 V to 5.25 V.
- What is the quiescent current per amplifier for the ADA4939-2YCPZ-RL?
The quiescent current per amplifier is typically 36.5 mA.
- What is the operating temperature range of the ADA4939-2YCPZ-RL?
The operating temperature range is from −40°C to +105°C.
- How is the gain of the ADA4939-2YCPZ-RL adjusted?
The gain is externally adjustable using a simple external feedback network of four resistors.
- What are some common applications of the ADA4939-2YCPZ-RL besides ADC drivers?
Besides ADC drivers, common applications include single-ended-to-differential converters, IF and baseband gain blocks, differential buffers, and line drivers.
- What package type is the ADA4939-2YCPZ-RL available in?
The ADA4939-2YCPZ-RL is available in a 4 mm × 4 mm, 24-lead LFCSP package.
