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MAX192：Low-Power, 8-Channel, Serial 10-Bit ADC

See MAX1248 and MAX148 for 3V Applications

The MAX192 is a low-cost, 10-bit data-acquisition system that combines an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and ultra-low power consumption. The device operates with a single +5V supply. The analog inputs are software configurable for single-ended and differential (unipolar/bipolar) operation. The 4-wire serial interface connects directly to SPI™, QSPI™, and MICROWIRE™ devices, without using external logic. A serial strobe output allows direct connection to TMS320 family digital signal processors. The MAX192 uses either the internal clock or an external serial-interface clock to perform successive approximation A/D conversions. The serial interface can operate beyond 4MHz when the internal clock is used. The MAX192 has an internal 4.096V reference with a drift of ±30ppm typical. A reference-buffer amplifier simplifies gain trim and two sub-LSBs reduce quantization errors. The MAX192 provides a hardwired active-low SHDN pin and two software-selectable power-down modes. Accessing the serial interface automatically powers up the device, and the quick turn-on time allows the MAX192 to be shut down between conversions. By powering down between conversions, supply current can be cut to under 10µA at reduced sampling rates. The MAX192 is available in 20-pin DIP and SO packages, and in a shrink-small-outline package (SSOP) that occupies 30% less area than an 8-pin DIP. The data format provides hardware and software compatibility with the MAX186/MAX188. For anti-aliasing filters, consult the data sheets for the MAX291-MAX297.

Key Features 8-Channel Single-Ended or 4-Channel Differential Inputs Single +5V Operation Low Power: 1.5mA (operating) 2µA (power-down) Internal Track/Hold, 133kHz Sampling Rate Internal 4.096V Reference 4-Wire Serial Interface is Compatible with SPI, QSPI, MICROWIRE, and TMS320 20-Pin DIP, SO, SSOP Packages Pin-Compatible 12-Bit Upgrade (MAX186/MAX188)

MAX192: Typical Operating Circuit Applications/Uses Automotive Electronics Battery Management Battery-Powered Applications Consumer Electronics Medical Instruments Pen-Entry Systems Portable Data Logging Robotics

DataSheet

Parametrics

Quality and Environmental Data

• MAX192.pdf

Related Products

• MAX11621：10-Bit, 300ksps ADCs with FIFO and Internal Reference
• MAX1043：10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports
• MAX1040：10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports
• MAX186：Low-Power, 8-Channel, Serial 12-Bit ADCs
• MAX188：Low-Power, 8-Channel, Serial 12-Bit ADCs
• MAX1248：+2.7V to +5.25V, Low-Power, 4-Channel, Serial, 10-Bit ADCs in QSOP-16
• MAX148：+2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs

Ordering Information