MAX1258

19-3295; Rev 2; 8/04 KIT ATION EVALU E L B A AVAIL 12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports General Description The MAX1220–MAX1223/MAX1257/MAX1258 integrate a 12-bit, multichannel, analog-to-digital converter (ADC), and a 12-bit, octal, digital-to-analog converter (DAC) in a single IC. These devices also include a temperature sensor and configurable general-purpose I/O ports (GPIOs) with a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The ADC is available in 8/12/16 inputchannel versions. The octal DAC outputs settle within 2.0µs and the ADC has a 300ksps conversion rate. All devices include an internal reference (2.5V or 4.096V) for both the ADC and DAC. Programmable refwww.DataSheet4U.com erence modes allow the use of an internal reference, an external reference, or a combination of both. Features such as an internal ±1°C accurate temperature sensor, FIFO, scan modes, programmable internal or external clock modes, data averaging, and AutoShutdown™ allow users to minimize power consumption and processor requirements. The low glitch energy (4nVs) and low digital feedthrough (0.5nVs) of the integrated octal DACs make these devices ideal for digital control of fast-response closed-loop systems. The devices are guaranteed to operate with a supply voltage from +2.7V to +3.6V (MAX1221/MAX1223/MAX1257) and from +4.75V to +5.25V (MAX1220/MAX1222/ MAX1258). These devices consume 2.5mA at 300ksps throughput, only 22µA at 1ksp thro...