16-channel, 12/10-bit ADCs with internal temperature sensors
( 01 Nov 2003 )
Maxim Integrated Products has introduced the MAX1226 to MAX1231 and MAX1026 to MAX1031 families of 12- and 10-bit ADCs with 8, 12, or 16 single-ended analog inputs or 4, 6, or 8 true-differential analog inputs.
These devices minimize microprocessor I/O requirements by including an on-chip FIFO, scan mode, internal clock mode, and internal averaging. An on-board ±1ˇC accurate temperature sensor provides local temperature, eliminating the need for an external temperature sensor. This reduces cost and saves board space. All features are accessed using a single SPI/QSPI/ MICROWIRE port.
The MAX1226/MAX1228/MAX1230 and MAX1026/MAX1028/MAX1030 operate from a single +5V supply, while the MAX1227/MAX1229/MAX1231 and MAX1027/MAX1029/ MAX1031 operate from a single +3.3V supply.
Low-power operation consumes only 1.8mA at the maximum conversion rate of 300ksps. Automatic shutdown between conversions reduces operating current to 330mA at 10ksps and no more than 5mA when the device is placed in complete shutdown. Along with high channel count and low power consumption, their ac performance (THD < -82dB) and dc accuracy (±1 LSB INL) make these devices suited for industrial process control, instrumentation, and medical applications. The 8-channel MAX1226/MAX1227/ MAX1026/MAX1027 are available in a 16-pin QSOP package, the 12-channel MAX1228/MAX1229/MAX1028/MAX1029 are available in a 20-pin QSOP package, while the 16-channel
MAX1230/MAX1231/MAX1030/MAX1031 are available in 24-pin QSOP and 28-pin QFN packages. All devices are available in both commercial (0ˇ to +70ˇC) and extended (-40ˇ to +85ˇC) temperature ranges. Prices start at $3.46 (1000).
