Overview
The ADA4940-2ACPZ-R7 is an ultralow power, low distortion, fully differential ADC driver from Analog Devices Inc. This device is designed to drive low power, high resolution, high performance SAR and Σ-Δ analog-to-digital converters (ADCs) with resolutions up to 16 bits. It operates on a single power supply and is ideal for applications requiring high performance and low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 2 |
| Gain Bandwidth Product | 260 MHz |
| Input Offset Voltage (Vos) | ±60 µV (typ) |
| Input Bias Current | 1.1 µA |
| Common Mode Rejection Ratio | 86 dB |
| Output Common Mode Voltage Adjustment | Adjustable |
| Settling Time to 0.1% | 34 ns |
| Input Voltage Noise | 3.9 nV/√Hz |
| Total Harmonic Distortion (THD) | -122 dB at 50 kHz, -96 dB at 1 MHz |
| Operating Temperature Range | -40°C to +125°C |
| Package Style | 24-lead LFCSP |
| Supply Voltage Range | 3 V to 7 V |
| Slew Rate | 95 V/µs |
| Rail-to-Rail Output | -VS + 0.1V to +VS - 0.1V |
Key Features
- Ultralow power consumption with a quiescent current of 1.25 mA per channel.
- Low harmonic distortion: -122 dB at 50 kHz and -96 dB at 1 MHz.
- Low input voltage noise of 3.9 nV/√Hz.
- 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 products.
- Disable pin to reduce power consumption.
- Rail-to-rail output.
Applications
- Driving low power, high resolution SAR and Σ-Δ analog-to-digital converters (ADCs).
- Single-ended-to-differential conversion.
- Differential buffers and line drivers.
- Medical imaging.
- Industrial process controls.
- Portable electronics.
Q & A
- What is the primary function of the ADA4940-2ACPZ-R7?
The ADA4940-2ACPZ-R7 is a fully differential ADC driver designed to drive low power, high resolution, high performance SAR and Σ-Δ analog-to-digital converters (ADCs). - What is the gain bandwidth product of the ADA4940-2ACPZ-R7?
The gain bandwidth product is 260 MHz. - What is the input offset voltage of the ADA4940-2ACPZ-R7?
The input offset voltage is ±60 µV (typ). - What is the common mode rejection ratio of the ADA4940-2ACPZ-R7?
The common mode rejection ratio is 86 dB. - What is the operating temperature range of the ADA4940-2ACPZ-R7?
The operating temperature range is -40°C to +125°C. - What is the package style of the ADA4940-2ACPZ-R7?
The package style is a 24-lead LFCSP. - What is the supply voltage range for the ADA4940-2ACPZ-R7?
The supply voltage range is 3 V to 7 V. - Does the ADA4940-2ACPZ-R7 have a disable feature?
Yes, it has a disable pin to reduce power consumption. - What are some common applications of the ADA4940-2ACPZ-R7?
Common applications include driving ADCs, single-ended-to-differential conversion, differential buffers, line drivers, medical imaging, industrial process controls, and portable electronics. - What is the quiescent current of the ADA4940-2ACPZ-R7?
The quiescent current is 1.25 mA per channel.
