MAX191BEWG+

MAXIM INTEGRATED PRODUCTS  MAX191BEWG+  模数转换器, 低功率, 12 bit, 100 kSPS, 双 +/-, 4.75 V, 5.25 V, WSOIC

The is a low power, 12bit sampling analogue to digital converter ADC with internal reference and power-down in 24 pin WSOIC package. It uses an successive approximation and input track/hold T/H circuitry to convert an analogue input signal to a 12bit digital output. Flexible control logic provides easy interface to microprocessors µPs so most applications require only the addition of passive components. No external hold capacitor is required for the T/H. It operates from a single supply or from dual supplies allowing ground-referenced bipolar input signals. The device features a logic power-down input which reduces 3mA VDD supply current to 50µA max including the internal-reference current. it provides 3 interface modes, two 8bit parallel modes and a serial interface mode that is compatible with SPI, QSPI and MICROWIRE serial interface standards. It is used in PC pen digitizers, electromechanical systems, automatic testing systems and telecommunications.

.

Supply voltage range is 4.75V to 5.25V

.

Operating temperature range from -40°C to 85°C

.

Minimum conversion time of 7.5µs & maximum acquisition time is 2µs

.

Operates with either an external reference or an internal reference

.

Internal reference features an adjustment input for trimming system gain errors

.

Tested sampling rate of 100Ksps

.

Low power of 3mA operating mode and 20µA power-down mode

.

Integral nonlinearity is ±1LSB and differential nonlinearity is ±1LSB

.

SINAD of 70dB & THD of -80dB at 1KHz input signal, TA = +25°C