MAX1240

The MAX1240/MAX1241 are low-power, 12-bit analog-to-digital converters (ADCs) available in 8-pin pack-ages. The MAX1240 operates with a single +2.7V to +3.6V supply, and the MAX1241 operates with a single+2.7V to +5.25V supply. Both devices feature a 7.5s successive-approximation ADC, a fast track/hold(1.5s), an on-chip clock, and a high-speed, 3-wire ser-ial interface. Power consumption is only 37mW (VDD = 3V) at the 73ksps maximum sampling speed. A 2A shutdown mode reduces power at slower throughput rates.

The MAX1240 has an internal 2.5V reference, while the MAX1241 requires an external reference. The MAX1241 accepts signals from 0V to VREF, and the reference input range includes the positive supply rail. An exter-nal clock accesses data from the 3-wire interface,which connects directly to standard microcontroller I/O ports. The interface is compatible with SPI(TM), QSPI(TM),and MICROWIRE(TM). Excellent AC characteristics and very low power com-bined with ease of use and small package size make these converters ideal for remote-sensor and data-acquisition applications, or for other circuits with demanding power consumption and space require-ments. The MAX1240/MAX1241 are available in 8-pin DIP and SO packages.