General Description

The MAX120/MAX122 complete, BiCMOS, sampling 12-bit analog-to-digital converters (ADCs) combine an on-chip track/hold (T/H) and a low-drift voltage reference with fast conversion speeds and low-power consumption. The T/H’s 350ns acquisition time combined with the MAX120’s 1.6µs conversion time results in throughput rates as high as 500k samples per second (ksps). Throughput rates of 333ksps are possible with the 2.6µs conversion time of the MAX122.

Features

♦ 12-Bit Resolution

♦ No Missing Codes Over Temperature

♦ 20ppm/°C -5V Internal Reference

♦ 1.6µs Conversion Time/500ksps Throughput (MAX120)

♦ 2.6µs Conversion Time/333ksps Throughput (MAX122)

♦ Low Noise and Distortion:

70dB (min) SINAD;

-77dB (max) THD (MAX122)

♦ Low Power Dissipation: 210mW

♦ Separate Track/Hold Control Input

♦ Continuous-Conversion Mode Available

♦ ±5V Input Range, Overvoltage Tolerant to ±15V

♦ 24-Pin Narrow DIP, Wide SO, and SSOP Packages

Applications

Digital-Signal Processing

Audio and Telecom Processing

Speech Recognition and Synthesis

High-Speed Data Acquisition

Spectrum Analysis

Data Logging Systems