Product Details
●The AD7732 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500 µs (2 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.
●The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 15.4 kHz.
●The analog front end features two fully differential input channels with unipolar or true bipolar input ranges to ±10 V while operating from a single +5 V analog supply. The part has an overrange and underrange detection capability and accepts an analog input overvoltage to ±16.5 V without degrading the performance of the adjacent channels.
●The differential reference input features “No-Reference” detect capability. The ADC also supports per channel system calibration options. The digital serial interface can be configured for 3-wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered.
●The part is specified for operation over the extended industrial temperature range of –40ºC to +105ºC and is available in 28-lead TSSOP package.
●Other parts in the AD7732 family are the AD7734 and the AD7738.
●The AD7734 is similar to AD7732, but its analog front end features four single-ended input channels.
●The AD7738 analog front end is configurable for four fully differential or eight single-ended input channels, features 0.625 V to 2.5 V bipolar/unipolar input ranges, and accepts a common-mode input voltage from 200 mV to AVDD – 300 mV. The AD7738 multiplexer output is pinned out externally, allowing the user to implement programmable gain or signal conditioning before being applied to the ADC.
●Applications
● PLCs/DCS
● Multiplexing applications
● Process control
● Industrial instrumentation
●### Features and Benefits
● High resolution ADC
●\- 24 bits no missing codes
●\- ±0.0015% nonlinearity
● 3-wire serial interface
●\- SPI®, QSPI™, MICROWIRE™, and DSP compatible
●\- Schmitt trigger on logic inputs
● Single-supply operation
●\- 5 V analog supply
●\- 3 V or 5 V digital supply
● Package: 28-lead TSSOP
● Optimized for fast channel switching
●\- 18-bit p-p resolution (21 bits effective) at 500 Hz
●\- 16-bit p-p resolution (19 bits effective) at 2 kHz
●\- 14-bit p-p resolution (18 bits effective) at 15 kHz
●\- On-chip per channel system calibration
● 2 fully differential analog inputs
●\- Input ranges +5 V, ±5 V, +10 V, ±10 V
●\- Overvoltage tolerant
●\- Up to ±16.5 V not affecting adjacent channel
●\- Up to ±50 V absolute maximum
