AD7732 Series

2-Channel, ±10 V Input Range, High Throughput, 24-Bit Sigma-Delta ADC

Catalog

2-Channel, ±10 V Input Range, High Throughput, 24-Bit Sigma-Delta ADC

Part	Architecture	Package / Case	Package / Case	Package / Case [y]	Number of Inputs	Mounting Type	Input Type	Number of Bits	Operating Temperature [Min]	Operating Temperature [Max]	Data Interface	Reference Type	Supplier Device Package	Configuration	Number of A/D Converters	Sampling Rate (Per Second)	Voltage - Supply, Analog
Analog Devices AD7732BRUZ	Sigma-Delta	28-TSSOP	0.173 in	4.4 mm	2	Surface Mount	Differential	24	-40 °C	105 ░C	DSP SPI	External	28-TSSOP	MUX-ADC	1	15.4 k per second	5 V
Analog Devices AD7732BRUZ-REEL7	Sigma-Delta	28-TSSOP	0.173 in	4.4 mm	2	Surface Mount	Differential	24	-40 °C	105 ░C	DSP SPI	External	28-TSSOP	MUX-ADC	1	15.4 k per second	5 V
Analog Devices AD7732BRUZ-REEL	Sigma-Delta	28-TSSOP	0.173 in	4.4 mm	2	Surface Mount	Differential	24	-40 °C	105 ░C	DSP SPI	External	28-TSSOP	MUX-ADC	1	15.4 k per second	5 V

Catalog

2-Channel, ±10 V Input Range, High Throughput, 24-Bit Sigma-Delta ADC

Key Features

• High resolution ADC24 bits no missing codes±0.0015% nonlinearity

• 3-wire serial interfaceSPI®, QSPI™, MICROWIRE™, and DSP compatibleSchmitt trigger on logic inputs

• Single-supply operation5 V analog supply3 V or 5 V digital supply

• Package: 28-lead TSSOP

• Optimized for fast channel switching18-bit p-p resolution (21 bits effective) at 500 Hz16-bit p-p resolution (19 bits effective) at 2 kHz14-bit p-p resolution (18 bits effective) at 15 kHzOn-chip per channel system calibration

• 2 fully differential analog inputsInput ranges +5 V, ±5 V, +10 V, ±10 VOvervoltage tolerantUp to ±16.5 V not affecting adjacent channelUp to ±50 V absolute maximum

Description

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 theAD7734and theAD7738.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.APPLICATIONSPLCs/DCSMultiplexing applicationsProcess controlIndustrial instrumentation