The MAX187/MAX189 serial 12-bit analog-to-digital converters (ADCs) operate from a single +5V supply and accept a 0 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 microcontrollers. The interface is compatible with SPI, QSPI, and MICROWIRE.
The MAX187BEWE has an on-chip buffered reference, and the MAX189 requires an external reference. Both the MAX187BEWE and MAX189 save space with 8-pin PDIP and 16-pin SO packages. Power consumption is 7.5mW and reduces to only 10μW in shutdown.
Excellent AC characteristics and very low power consumption combined with ease of use and small package size make these converters ideal for remote DSP and sensor applications, or for circuits where power consumption and space are crucial.
Feature
- 12-Bit Resolution
- ±? 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 PDIP and 16-Pin SO
Applications
- High-Accuracy Process Control
- Isolated Data Acquisition
- Portable Data Logging
- Remote Digital Signal Processing
