Overview
The AD7938-6, produced by Analog Devices Inc., is a 12-bit, high-speed, low-power successive approximation (SAR) analog-to-digital converter (ADC). This component operates from a single 2.7 V to 5.25 V power supply and achieves throughput rates of up to 625 kSPS. It features a low noise, wide bandwidth, differential track-and-hold amplifier capable of handling input frequencies up to 50 MHz. The AD7938-6 is designed with eight analog input channels and a channel sequencer, allowing for preprogrammed sequential conversion of these channels. It supports single-ended, fully differential, or pseudo differential analog inputs, making it versatile for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Throughput Rate | Up to 625 kSPS |
| Power Supply | 2.7 V to 5.25 V |
| Analog Input Channels | 8 channels |
| Input Frequency Capability | Up to 50 MHz |
| Input Configuration | Single-ended, fully differential, or pseudo differential |
| On-chip Reference | 2.5 V |
| Output Coding | Straight binary or twos complement |
| Package Options | 32-Lead LFCSP (5mm x 5mm), 32-Lead TQFP (7mm x 7mm x 1mm) |
| Operating Temperature Range | –40°C to +85°C |
Key Features
- High-speed conversion with throughput rates up to 625 kSPS.
- Low power consumption with flexible power management options.
- On-chip 2.5 V reference that can be used or overdriven by an external reference.
- Channel sequencer for preprogrammed sequential conversion of channels.
- Support for single-ended, fully differential, or pseudo differential analog inputs.
- Easy interfacing with microprocessors and DSPs using standard control inputs.
- Low noise, wide bandwidth differential track-and-hold amplifier.
- Output coding options: straight binary or twos complement.
Applications
The AD7938-6 is suitable for a variety of high-speed data acquisition applications, including:
- Medical imaging and diagnostics.
- Industrial process control and automation.
- Aerospace and defense systems.
- High-speed data acquisition systems.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7938-6 ADC?
The AD7938-6 has a resolution of 12 bits.
- What is the maximum throughput rate of the AD7938-6?
The maximum throughput rate is up to 625 kSPS.
- What are the power supply requirements for the AD7938-6?
The AD7938-6 operates from a single 2.7 V to 5.25 V power supply.
- How many analog input channels does the AD7938-6 have?
The AD7938-6 features eight analog input channels.
- What types of analog input configurations are supported by the AD7938-6?
The AD7938-6 supports single-ended, fully differential, or pseudo differential analog inputs.
- Does the AD7938-6 have an on-chip reference voltage?
Yes, the AD7938-6 has an accurate on-chip 2.5 V reference.
- How is the conversion process controlled in the AD7938-6?
The conversion process is controlled using standard control inputs that allow easy interfacing with microprocessors and DSPs.
- What are the package options available for the AD7938-6?
The AD7938-6 is available in 32-Lead LFCSP (5mm x 5mm) and 32-Lead TQFP (7mm x 7mm x 1mm) packages.
- What is the operating temperature range of the AD7938-6?
The operating temperature range is –40°C to +85°C.
- Can the AD7938-6 be used in high-speed data acquisition systems?
Yes, the AD7938-6 is designed for high-speed data acquisition applications.
