Overview
The AD7939BSUZ-REEL7 is a high-performance, 10-bit, 8-channel analog-to-digital converter (ADC) produced by Analog Devices Inc. This successive approximation (SAR) ADC operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1.5 million samples per second (MSPS). The device is packaged in a 32-lead TQFP (7mm x 7mm x 1mm) and is designed for low power consumption and high-speed data acquisition.
The AD7939 includes a low noise, wide bandwidth, differential track-and-hold amplifier capable of handling input frequencies up to 50 MHz. It also features a channel sequencer that allows preprogrammed selection of channels to be converted sequentially, supporting single-ended, fully differential, or pseudo differential analog inputs.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 10 bits |
| Number of Analog Input Channels | 8 channels |
| Sampling Rate | Up to 1.5 MSPS |
| Power Supply Voltage | 2.7 V to 5.25 V |
| Package Type | 32-Lead TQFP (7mm x 7mm x 1mm) |
| Operating Temperature Range | -40°C to +85°C |
| Signal to Noise Ratio (SNR) | 69 dB at 50 kHz input frequency |
| Conversion Time | 0.675 μs maximum |
| On-Chip Reference Voltage | 2.5 V ±0.2% maximum @ 25°C, 25 ppm/°C maximum |
Key Features
- High-speed successive approximation (SAR) ADC with up to 1.5 MSPS throughput rate.
- Low power consumption with flexible power management options.
- Eight analog input channels with a channel sequencer for sequential conversion.
- Supports single-ended, fully differential, and pseudo differential analog inputs.
- Accurate on-chip 2.5 V reference with the option to use an external reference.
- Low noise, wide bandwidth, differential track-and-hold amplifier.
- No pipeline delays and high-speed parallel interface in word/byte modes.
- Full shutdown mode with a maximum current of 2 μA.
Applications
The AD7939BSUZ-REEL7 is suitable for a variety of high-speed data acquisition applications, including:
- Industrial automation and control systems.
- Medical devices requiring high-speed and low-power ADCs.
- Aerospace and defense systems where reliability and precision are critical.
- Automotive systems, especially those requiring real-time data acquisition.
- Test and measurement equipment where high accuracy and speed are necessary.
Q & A
- What is the resolution of the AD7939BSUZ-REEL7 ADC?
The AD7939BSUZ-REEL7 has a resolution of 10 bits.
- What is the maximum sampling rate of the AD7939BSUZ-REEL7?
The maximum sampling rate is up to 1.5 million samples per second (MSPS).
- What types of analog inputs does the AD7939BSUZ-REEL7 support?
The device supports single-ended, fully differential, and pseudo differential analog inputs.
- What is the power supply voltage range for the AD7939BSUZ-REEL7?
The power supply voltage range is from 2.7 V to 5.25 V.
- What is the package type of the AD7939BSUZ-REEL7?
The device is packaged in a 32-lead TQFP (7mm x 7mm x 1mm).
- What is the operating temperature range of the AD7939BSUZ-REEL7?
The operating temperature range is from -40°C to +85°C.
- Does the AD7939BSUZ-REEL7 have an on-chip reference voltage?
Yes, it has an accurate on-chip 2.5 V reference voltage.
- Can the AD7939BSUZ-REEL7 be used with an external reference voltage?
Yes, the on-chip reference can be overdriven by an external reference voltage.
- What is the conversion time of the AD7939BSUZ-REEL7?
The maximum conversion time is 0.675 μs.
- Does the AD7939BSUZ-REEL7 have any power-saving features?
Yes, it features flexible power management options and a full shutdown mode with a maximum current of 2 μA.
