Overview
The AD7732BRUZ-REEL7, produced by Analog Devices Inc., is a high-precision, high-throughput analog-to-digital converter (ADC) designed for demanding applications requiring high resolution and fast channel switching. This 24-bit Sigma-Delta ADC features two fully differential analog input channels with various input ranges and is optimized for use in industrial instrumentation, process control, and multiplexing applications. The device operates from a single +5 V analog supply and can be configured via a simple digital interface to balance noise performance against data throughput.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | - | 24 bits | - | - | No missing codes |
| Nonlinearity | - | ±0.0015% | - | - | - |
| Analog Input Range | - | ±10 V, ±5 V, 0 V to +10 V, 0 V to +5 V | - | - | Differential voltage |
| Analog Input Absolute Voltage | -16.5 V | - | +16.5 V | - | Maximum without affecting adjacent channels |
| Analog Supply Voltage | 4.75 V | 5 V | 5.25 V | V | Nominal to AGND |
| Digital Supply Voltage | 2.7 V | 3 V or 5 V | 5.5 V | V | - |
| Throughput Rate | - | Up to 15.4 kHz | - | - | Depending on configuration |
| Interface | - | 3-wire serial (SPI, QSPI, MICROWIRE, DSP compatible) | - | - | - |
| Package | - | 28-Lead TSSOP | - | - | 4.4mm x 9.7mm |
Key Features
- High resolution ADC with 24 bits and no missing codes, achieving up to 21 bits effective resolution at 500 Hz and 18 bits effective at 15 kHz.
- Optimized for fast channel switching with true 16-bit peak-to-peak resolution achievable in 500 μs (2 kHz channel switching).
- Two fully differential analog input channels with unipolar or true bipolar input ranges up to ±10 V.
- Overrange and underrange detection capability and acceptance of analog input overvoltage up to ±16.5 V without degrading adjacent channel performance.
- Single-supply operation with 5 V analog supply and 3 V or 5 V digital supply.
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Schmitt trigger on logic inputs and on-chip per channel system calibration.
Applications
- Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS).
- Multiplexing applications.
- Process control.
- Industrial instrumentation.
Q & A
- What is the resolution of the AD7732 ADC?
The AD7732 has a 24-bit resolution with no missing codes. - What are the available input ranges for the AD7732?
The input ranges include ±10 V, ±5 V, 0 V to +10 V, and 0 V to +5 V. - What is the maximum analog input voltage the AD7732 can handle without affecting adjacent channels?
The AD7732 can handle up to ±16.5 V without affecting adjacent channels. - What types of interfaces does the AD7732 support?
The AD7732 supports 3-wire serial interfaces including SPI, QSPI, MICROWIRE, and DSP compatible interfaces. - What is the typical analog supply voltage for the AD7732?
The typical analog supply voltage is 5 V. - What is the package type of the AD7732BRUZ-REEL7?
The package type is a 28-Lead TSSOP (4.4mm x 9.7mm). - What are some common applications of the AD7732?
Common applications include PLCs/DCS, multiplexing applications, process control, and industrial instrumentation. - How does the AD7732 handle overvoltage conditions?
The AD7732 has an overrange and underrange detection capability and can accept analog input overvoltage up to ±16.5 V without degrading adjacent channel performance. - What is the maximum throughput rate of the AD7732?
The maximum throughput rate is up to 15.4 kHz, depending on the configuration. - Does the AD7732 support single-supply operation?
Yes, the AD7732 supports single-supply operation with a 5 V analog supply and 3 V or 5 V digital supply.
