Overview
The ADA4938-1ACPZ-R2, produced by Analog Devices Inc., is a low noise, ultralow distortion, high speed differential amplifier. It is specifically designed to drive high performance Analog-to-Digital Converters (ADCs) with resolutions up to 16 bits from dc to 27 MHz, or up to 12 bits from dc to 74 MHz. This amplifier is fabricated using Analog Devices' proprietary third-generation, high voltage XFCB process, which enables it to achieve very low levels of distortion and an input voltage noise of only 2.6 nV/√Hz. The ADA4938-1 is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP package and is specified to operate over the extended industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Voltage Noise | 2.6 nV/√Hz | - |
| Harmonic Distortion (HD2, HD3) | -106 dBc (HD2 at 10 MHz), -109 dBc (HD3 at 10 MHz) | - |
| Bandwidth | -3 dB Small Signal Bandwidth: 1000 MHz (G = +1) | - |
| Slew Rate | 4700 V/us | - |
| Offset Voltage | 1 mV typical | - |
| Supply Voltage Range | +5 V to ±5 V | - |
| Operating Temperature Range | −40°C to +85°C | - |
| Package | 16-Lead LFCSP | - |
Key Features
- Low noise and ultralow distortion, making it ideal for high performance ADCs.
- High speed operation with a -3 dB bandwidth of 1000 MHz and a slew rate of 4700 V/us.
- Adjustable output common-mode voltage to match the input of the ADC.
- Internal common-mode feedback loop for exceptional output balance and suppression of even-order harmonic distortion products.
- Full differential and single-ended-to-differential gain configurations.
- Fast overdrive recovery time of 4 ns.
- Wide supply voltage range from +5 V to ±5 V.
Applications
- Driving high performance ADCs in data acquisition systems.
- Signal processing applications requiring low noise and high speed.
- Single-ended-to-differential converters.
- IF and baseband gain blocks.
- Differential buffers and line drivers.
Q & A
- What is the primary application of the ADA4938-1?
The ADA4938-1 is primarily used for driving high performance Analog-to-Digital Converters (ADCs) in various data acquisition and signal processing applications.
- What is the input voltage noise of the ADA4938-1?
The input voltage noise of the ADA4938-1 is 2.6 nV/√Hz.
- What is the bandwidth of the ADA4938-1?
The -3 dB small signal bandwidth of the ADA4938-1 is 1000 MHz for a gain of +1.
- What is the slew rate of the ADA4938-1?
The slew rate of the ADA4938-1 is 4700 V/us.
- What is the typical offset voltage of the ADA4938-1?
The typical offset voltage of the ADA4938-1 is 1 mV.
- What is the operating temperature range of the ADA4938-1?
The ADA4938-1 operates over an extended industrial temperature range of −40°C to +85°C.
- What package options are available for the ADA4938-1?
The ADA4938-1 is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP package.
- Can the ADA4938-1 be used in single-ended-to-differential configurations?
- What is the supply voltage range for the ADA4938-1?
The supply voltage range for the ADA4938-1 is from +5 V to ±5 V.
- How does the ADA4938-1 handle harmonic distortion?
The ADA4938-1 features an internal common-mode feedback loop that provides exceptional output balance and suppression of even-order harmonic distortion products.
