Features: 12-Bit Resolution
±1⁄2 LSB Integral Nonlinearity (MAX187A/MAX189A)
Internal Track/Hold, 75kHz Sampling Rate
Single +5V Operation
Low Power: 2µA Shutdown Current
1.5mA Operating Current
Internal 4.096V Buffered Reference (MAX187)
3-Wire Serial Interface, Compatible with SPI,QSPI, and Microwire
Small-Footprint 8-Pin DIP and 16-Pin SOApplication-Portable Data Logging
-Remote Digital Signal Processing
-Isolated Data Acquisition
-High-Accuracy Process ControlPinout
SpecificationsVDD to GND...........................................................-0.3V to +6V
AIN to GND..............................................-0.3V to (VDD + 0.3V)
REF to GND..............................................-0.3V to (VDD + 0.3V)
Digital Inputs to GND...............................-0.3V to (VDD + 0.3V)
Digital Outputs to GND............................-0.3V to (VDD + 0.3V)
SHDN to GND...........................................-0.3V to (VDD + 0.3V)
REF Load Current (MAX187).........................4.0mA Continuous
REF Short-Circuit Duration (MAX187)...............................20sec
DOUT Current...............................................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)..500mW
16-Pin Wide SO (derate 8.70mW/°C above +70°C)...478mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C).......440mW
Operating Temperature Ranges:
MAX187_C_ _/MAX189_C_ _.............................0°C to +70°C
MAX187_E_ _/MAX189_E_ _..........................-40°C to +85°C
MAX187_MJA/MAX189_MJA...........................-55°C to +125°C
Storage Temperature Range........................-60°C to +150°C
Lead Temperature (soldering, 10sec)..........................+300°CDescriptionThe 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.
MAX187 Data Sheet
