Maxim Integrated MAX190BCNG

Description
The MAX190/MAX191 are monolithic, CMOS, 12-bit analog-to-digital converters (ADCs) featuring differential inputs, track/hold (T/H), internal voltage reference, internal or external clock, and parallel or serial uP interface. Both devices have a 7.5us conversion time. The MAX190 has a 5us acquisition time and sampling rate of 76k samples per second (ksps), while the MAX191 has a 2us acquisition time and is guaranteed at 100ksps.
Decoupling capacitors are the only external components needed for the power supply and reference. These ADCs operate with either an external reference, or an internal reference that features an adjustment input for trimming system gain errors.
Both the MAX190 and MAX191 operate from a single 5V supply. The MAX191 also operates from dual 5V supplies, allowing ground-referenced bipolar input signals.
Both devices feature a logic power-down input, which reduces the 3mA VDD supply current to 50uA max, including the internal-reference current.
The MAX190/MAX191 provide three interface modes: two 8-bit parallel modes, and a serial interface mode that is compatible with SPI, QSPI and Microwire™ serial-interface standards.

Features
12-Bit Resolution, 1/2LSB Linearity
5V or ±5V Operation (MAX191)
Built-In Track/Hold
Internal Reference with Adjustment Capability
Low Power: 3mA Operating Mode, 20μA Power-Down Mode
100ksps Tested Sampling Rate (MAX191)
Serial and 8-Bit Parallel uP Interface
24-Pin Narrow DIP and Wide SO Packages

Applications
Battery-Powered Data Logging
PC Pen Digitizers
High-Accuracy Process Control
Electromechanical Systems
Data-Acquisition Boards for PCs
Automatic Testing Systems
Telecommunications
Digital-Signal Processing (DSP)