AD7732BRUZ

Product Summary

The AD7732BRUZ is a high precision, high throughput analog front end. True 16-bit p-p resolution is achievable with a total conversion time 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 AD7732BRUZ 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 applications of the AD7732BRUZ include PLCs/DCS, multiplexing applications, process control, industrial instrumentation.

Parametrics

AD7732BRUZ absolute maximum ratings: (1)AVDD to AGND, DVDD to DGND: -0.3 V to +7 V; (2)AGND to DGND: -0.3 V to +0.3 V; (3)AVDD to DVDD: -5 V to +5 V; (4)AIN to AGND: -50 V to +50 V; (5)RA, RB, RC, RD to AGND: -11 V to +25 V; (6)BIAS to AGND: -0.3 V to AVDD + 0.3 V; (7)REFIN+, REFIN– to AGND: -0.3 V to AVDD + 0.3 V; (8)P0, P1 Voltage to AGND: -0.3 V to AVDD + 0.3 V; (9)P0, P1 Current (TMAX = 70℃): 8 mA; (10)P0, P1 Current (TMAX = 85℃): 5 mA; (11)P0, P1 Current (TMAX = 105℃): 2.5 mA; (12)Digital Input Voltage to DGND: -0.3 V to DVDD + 0.3 V; (13)Digital Output Voltage to DGND: -0.3 V to DVDD + 0.3 V; (14)Operating Temperature Range: -40℃to +105℃; (15)Storage Temperature Range: -65℃to +150℃; (16)Junction Temperature: 150℃; (17)TSSOP Package, Power Dissipation: 660 mW; (18)θJA Thermal Impedance: 97.9℃/W; (19)Lead Temperature, Soldering, Vapor Phase (60 sec): 215℃; (20)Infrared (15 sec): 220℃.

Features

AD7732BRUZ features: (1)High resolution ADC: 24 bits no missing codes; ±0.0015% nonlinearity; (2)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; (3)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; (4)3-wire serial interface: SPI TM, QSPI TM, MICROWIRE TM, and DSP compatible; Schmitt trigger on logic inputs; (5)Single-supply operation: 5 V analog supply; 3 V or 5 V digital supply; (6)Package: 28-lead TSSOP.

Diagrams

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