14-Bit, 333 kSPS, Serial Sampling A/D Converter

The AD7851 is a high speed, 14-bit ADC which operate from a single 5V power supply. The ADC powers-up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power down options for low power applications.

The AD7851 is capable of 272kHz throughput rate. The input track-and-hold acquires a signal in 0.33 µs and features a pseudo-differential sampling scheme. The AD7851 has the added advantage of two input voltage ranges ( 0 to VREF, and -VREF/2 to +VREF/2 centered about VREF/2). Input signal range is to VDD and the part is capable of converting full-power signals to 140 kHz.

CMOS construction ensures low power dissipation (60 mW typ) with power-down mode (5 µW typ). The part is available in 24- pin, 0.3 inch-wide dual-in-line package (DIP), 24 lead small outline (SOIC) and 24 lead small shrink outline (SSOP) packages.

PRODUCT HIGHLIGHTS

* Single 5 V supply.

* Operates with reference voltages from 4 V to VDD.

* Analog input ranges from 0 V to VDD.

* System and self-calibration including power-down mode.

* Versatile serial I/O port.

APPLICATIONS

* Digital Signal Processing

* Speech Recognition and Synthesis

* Spectrum Analysis

* DSP Servo Control

* Instrumentation and Control Systems

* High Speed Modems

* Automotive

* 333 kSPS Throughput Rate/±2 LSB DNL—A Grade

* 285 kSPS Throughput Rate/±1 LSB DNL—K Grade

* A and K Grades Guaranteed to 125°C/238 kSPS Throughput Rate

* Pseudo-Differential Input with Two Input Ranges

* Read/Write Capability of Calibration Data