12Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports
Description
The MAX1220/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 and 16 input-channel versions. The octal DAC outputs settle within 2.0µs and
the ADC has a 225ksps conversion rate.
Features
♦12-Bit, 225ksps ADC
Analog Multiplexer with True-Differential Track/Hold T/H
16 Single-Ended Channels or 8 Differential Channels Unipolar or Bipolar MAX1257/MAX1258
Eight Single-Ended Channels or Four Differential Channels Unipolar or Bipolar MAX1220
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
♦12-Bit, Octal, 2µs Settling DAC
Ultra-Low Glitch Energy 4nV•s
Power-Up Options from Zero Scale or Full Scale
Excellent Accuracy: ±0.5 LSB INL
♦Internal Reference or External Single-Ended/Differential Reference Internal Reference Voltage 2.5V or 4.096V
♦Internal ±1°C Accurate Temperature Sensor
♦On-Chip FIFO Capable of Storing 16 ADC Conversion Results and One Temperature Result
♦On-Chip Channel-Scan Mode and Internal Data-Averaging Features
♦Analog Single-Supply Operation
+2.7V to +3.6V or +4.75V to +5.25V
♦Digital Supply: +2.7V to AVDD
♦25MHz, SPI/QSPI/MICROWIRE Serial Interface
♦AutoShutdown Between Conversions
♦Low-Power ADC
2.5mA at 225ksps
22µA at 1ksps
0.2µA at Shutdown
♦Low-Power DAC: 1.5mA
♦Evaluation Kit Available Order General
Applications
Controls for Optical Components
Base-Station Control Loops
System Supervision and Control
Data-Acquisition Systems