AD9243*

Features:

Monolithic 14-Bit, 3 MSPS A/D Converter
Low Power Dissipation: 110 mW
Single +5 V Supply
Integral Nonlinearity Error: 2.5 LSB
Differential Nonlinearity Error: 0.6 LSB
Input Referred Noise: 0.36 LSB
Complete: On-Chip Sample-and-Hold Amplifier and Voltage Reference
Signal-to-Noise and Distortion Ratio: 79.0 dB
Spurious-Free Dynamic Range: 91.0 dB
Out-of-Range Indicator
Straight Binary Output Data
44-Lead MQFP


Pinout




Specifications

AVDD         AVSS          0.3  +6.5     V
DVDD         DVSS          0.3  +6.5    V
AVSS          DVSS          0.3  +0.3    V
AVDD         DVDD          6.5  +6.5    V
DRVDD       DRVSS        0.3  +6.5    V
DRVSS        AVSS          0.3  +0.3    V
REFCOM     AVSS          0.3  +0.3    V


Description

The AD9243 is a 3 MSPS, single supply, 14-bit analog-to-digital converter (ADC). It combines a low cost, high speed CMOS process and a novel architecture to achieve the resolution and speed of existing hybrid implementations at a fraction of the power consumption and cost. It is a complete, monolithic ADC with an on-chip, high performance, low noise sample-and-hold amplifier and programmable voltage reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application. The device uses a multistage differential pipelined architecture with digital output error correction logic to guarantee no missing codes over the full operating temperature range.

The input of the AD9243 is highly flexible, allowing for easy interfacing to imaging, communications, medical, and data- acquisition systems. A truly differential input structure allows for both single-ended and differential input interfaces of varying input spans. The sample-and-hold amplifier (SHA) is equally suited for both multiplexed systems that switch full-scale voltage levels in successive channels as well as sampling single-channel inputs at frequencies up to and beyond the Nyquist rate. Also, the AD9243 performs well in communication systems employing Direct-IF Down Conversion since the SHA in the differential input mode can achieve excellent dynamic performance well beyond its specified Nyquist frequency of 1.5MHz.