overview
The MAX191 is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) featuring differential inputs, track/hold (T/H), internal voltage reference, internal or external clock, and parallel or serial µP interface. The MAX191 has a 7.5µs conversion time, a 2µs acquisition time, and a guaranteed 100ksps sample rate.
The MAX191 operates from a single +5V supply or from dual ±5V supplies, allowing ground-referenced bipolar input signals. The device features a logic power-down input, which reduces the 3mA VDDsupply current to 50µA max, including the internal-reference current.
Decoupling capacitors are the only external components needed for the power supply and reference. This ADC operates with either an external reference, or an internal reference that features an adjustment input for trimming system gain errors.
The MAX191 provides three interface modes: two 8-bit parallel modes, and a serial interface mode that is compatible with SPI™, QSPI,™ and MICROWIRE™ serial-interface standards
An EV kit is available: the MAX191EVKIT
Key features
12-Bit Resolution, 1/2 LSB Linearity
+5V or ±5V Operation
Built-In Track/Hold
Internal Reference with Adjustment Capability
Low Power:
3mA Operating Mode
20µA Power-Down Mode
100ksps Tested Sampling RateSerial and 8-Bit Parallel µP Interface24-Pin Narrow DIP and Wide SO Packages
Application/Use
Automatic Test Equipment (ATE)
Battery-powered data logging
Data acquisition
digit
Signal processing(DSP)
Electromechanical systems
High-precision process control
PC pen input quantizer
telecommunications
Ultra-small sensorSpot supplier-Microchip Centennial Enter this information