AD7482

7/5/01 5 PM PRELIMINARY TECHNICAL DATA = Preliminary Technical Data FEATURES Fast Throughput Rate: 3MSPS Wide Input Bandwidth: 50MHz No Pipeline Delays with SAR ADC Excellent DC Accuracy Performance Two Parallel Interface Modes Low Power: 90mW (Full-Power) and 5mW (NAP Mode) Standby Mode: 1µA max Single +5V Supply Operation Internal +2.5V Reference Full-Scale Overrange Mode (using 13th bit) System Offset Removal via User Access Offset Register Nominal 0 to +2.5V Input with Shifted Range Capability 14-Bit Pin Compatible Upgrade (AD7484) GENERAL DESCRIPTION VREF3 BUF 3MSPS, 12-Bit SAR ADC AD7482 FUNCTIONAL BLOCK DIAGRAM AVDD AGND CBIAS DVDD DGND VREF1 VREF2 2.5 V REFERENCE VIN T/H 12-Bit Error Correcting SAR AD7482 MODE1 MODE2 D12 CLIP NAP STBY RESET CONVST VDRIVE CONTROL LOGIC AND I/O REGISTERS D11 D10 D9 D8 D7 The AD7482 is a 12-bit, high speed, low power, successive-approximation ADC. The part features a parallel interface with throughput rates of up to 3MSPS. The part contains a low-noise, wide bandwidth track/hold amplifier which can handle input frequencies in excess of 50MHz. The conversion process is a proprietary algorithmic successive-approximation technique which results in no pipeline delays. The input signal is sampled and a conversion is initiated on the falling edge of a CONVST signal. The conversion process is controlled via an internally trimmed oscillator. Interfacing is via standard parallel signal lines making the part directly compatible with mic...