10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

The MAX1020/MAX1022/MAX1057/MAX1058 integrate a multichannel, 10-bit, analog-to-digital converter (ADC) and an octal, 10-bit, 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 input-channel versions. The octal DAC outputs settle within 2.0µs, and the ADC has a 225ksps conversion rate.

All devices include an internal reference (2.5V or 4.096V) providing a well-regulated, low-noise reference for both the ADC and DAC. Programmable reference modes for the ADC and the DAC 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 both power consumption and processor requirements. The low glitch energy (4nV × s) and low digital feedthrough (0.5nV × s) 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 (MAX1057) and from +4.75V to +5.25V (MAX1020/MAX1022/MAX1058). The devices consume 2.5mA at 225ksps throughput, only 22µA at 1ksps throughput, and under 0.2µA in the shutdown mode. The MAX1057/MAX1058 feature 12 GPIOs, while the MAX1020 offers four GPIOs that can be configured as inputs or outputs.

The MAX1057/MAX1058 are available in 48-pin thin QFN packages. The MAX1020/MAX1022 are available in 36- pin thin QFN packages. All devices are specified over the -40°C to +85°C temperature range. Applications

* Base-Station Control Loops * Controls for Optical Components * Data Acquisition Systems * System Supervision and Control

* 10-Bit, 225ksps ADC

* Analog Multiplexer with True-Differential Track/Hold (T/H)

* 16 Single-Ended Channels or 8 Differential Channels (Unipolar or Bipolar) (MAX1057/MAX1058)

* 12 Single-Ended Channels or 6 Differential Channels (Unipolar or Bipolar) (MAX1022)

* 8 Single-Ended Channels or 4 Differential Channels (Unipolar or Bipolar) (MAX1020)

* Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL

* 10-Bit, Octal, 2µs Settling DAC

* Ultra-Low Glitch Energy (4nV × s)

* Power-Up Options from Zero Scale or Full Scale

* Excellent Accuracy: ±1 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 VAVDD

* 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 MAX1258EVKIT)