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MAX189BEWE Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX189BEWE Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 20 page __________________General Description The MAX187/MAX189 serial 12-bit analog-to-digital converters (ADCs) operate from a single +5V supply and accept a 0V to 5V analog input. Both parts feature an 8.5µs successive-approximation ADC, a fast track/hold (1.5µs), an on-chip clock, and a high-speed 3-wire serial interface. The MAX187/MAX189 digitize signals at a 75ksps throughput rate. An external clock accesses data from the interface, which communicates without external hardware to most digital signal processors and micro- controllers. The interface is compatible with SPI™, QSPI™, and Microwire™. The MAX187 has an on-chip buffered reference, and the MAX189 requires an external reference. Both the MAX187 and MAX189 save space with 8-pin DIP and 16-pin SO packages. Power consumption is 7.5mW and reduces to only 10µW in shutdown. Excellent AC characteristics and very low power con- sumption combined with ease of use and small pack- age size make these converters ideal for remote DSP and sensor applications, or for circuits where power consumption and space are crucial. ___________________________Applications Portable Data Logging Remote Digital Signal Processing Isolated Data Acquisition High-Accuracy Process Control ________________________________Features o 12-Bit Resolution o ±1⁄2 LSB Integral Nonlinearity (MAX187A/MAX189A) o Internal Track/Hold, 75kHz Sampling Rate o Single +5V Operation o Low Power: 2µA Shutdown Current 1.5mA Operating Current o Internal 4.096V Buffered Reference (MAX187) o 3-Wire Serial Interface, Compatible with SPI, QSPI, and Microwire o Small-Footprint 8-Pin DIP and 16-Pin SO _________________Ordering Information +5V, Low-Power, 12-Bit Serial ADCs ________________________________________________________________ Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature. 19-0196; Rev 0; 10/93 PART TEMP. RANGE PIN-PACKAGE ERROR (LSB) MAX187ACPA 0°C to +70°C 8 Plastic DIP ± 1 ⁄2 MAX187BCPA 0°C to +70°C 8 Plastic DIP ±1 MAX187CCPA 0°C to +70°C 8 Plastic DIP ±2 MAX187ACWE 0°C to +70°C 16 Wide SO ± 1 ⁄2 MAX187BCWE 0°C to +70°C 16 Wide SO ±1 MAX187CCWE 0°C to +70°C 16 Wide SO ±2 MAX187BC/D 0°C to +70°C Dice* ±1 ™ SPI and QSPI are trademarks of Motorola. Microwire is a trademark of National Semiconductor. Ordering Information continued on last page. * Dice are specified at TA = +25°C, DC parameters only. ** Contact factory for availability and processing to MIL-STD-883. ________________Functional Diagram GND 5 REF 4 AIN 2 VDD 1 T/H BANDGAP REFERENCE +2.5V (MAX187 ONLY) 10k AV = 1.638 (4.096V) REF- REF+ DAC OUTPUT SHIFT REGISTER DOUT 6 SCLK 8 CS 7 SHDN 3 CONTROL AND TIMING 12-BIT SAR COMPARATOR BUFFER ENABLE/DISABLE NOTE: PIN NUMBERS SHOWN ARE FOR 8-PIN DIPs ONLY. MAX187 MAX189 TOP VIEW 1 2 3 4 8 7 6 5 SCLK CS DOUT GND REF SHDN AIN VDD DIP MAX187 MAX189 Pin Configurations continued on last page. _________________Pin Configurations EVALUATION KIT MANUAL FOLLOWS DATA SHEET |
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