Product Summary

The ADS7831U is a complete 12-bit sampling A/D using state-of-the-art CMOS structures. The ADS7831U contains a complete 12-bit capacitor-based SAR A/D with inherent S/H, reference, clock, interface for microprocessor use, and three-state output drivers. The ADS7831U is specified at a 600kHz sampling rate, and guaranteed over the full temperature range. A ±2.5V input range and excellent Nyquist performance provide an optimum solution in ±5V supply systems.

Parametrics

ADS7831U absolute maximum ratings: (1)Analog Inputs: VIN: ±25V; REF: +VANA +0.3V to AGND2 –0.3V; CAP: Indefinite Short to AGND2; (2)Momentary Short to +VANA; (3)Ground Voltage Differences: DGND, AGND1, AGND2: ±0.3V; (4)+VANA: +7V; (5)+VDIG to +VANA: +0.3V; (6)+VDIG: 7V; (7)–VANA: –7V; (8)Digital Inputs: –0.3V to +VDIG +0.3V; (9)Maximum Junction Temperature: +165℃; (10)Internal Power Dissipation: 825mW; (11)Lead Temperature (soldering, 10s): +300℃.

Features

ADS7831U features: (1)600kHz throughput rate; (2)standard ±2.5V input range; (3)69dB min sinad with 250kHz Input; (4)complete with S/H, REF, CLOCK, ETC; (5)parallel data w/latches; (6)fully specified –40 to +85℃; (7)15MHz –3dB bandwidth; (8)28-PIN 0.3 inch PDIP and SOIC.

Diagrams

ADS7831U block diagram

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