General Description

The MAX1040/MAX1042/MAX1046/MAX1048 integrate a multichannel, 10-bit, analog-to-digital converter (ADC) and a quad, 10-bit, digital-to-analog converter (DAC) in a single IC. The 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 a four or an eight input-channel version. The four DAC outputs settle within 2.0µs, and the ADC has a 225ksps conversion rate.

All devices include an internal reference (4.096V) providing a well-regulated, low-noise reference for both the ADC and DAC. Programmable reference modes for the ADC and 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 quad DACs make these devices ideal for digital control of fast response closed-loop systems.

Features

♦ 10-Bit, 225ksps ADC

   Analog Multiplexer with True-Differential

      Track/Hold (T/H)

   Eight Single-Ended Channels or Four

      Differential

      Channels (Unipolar or Bipolar)

      (MAX1040/MAX1042)

   Four Single-Ended Channels or Two Differential

      Channels (Unipolar or Bipolar)

      (MAX1046/MAX1048)

   Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB

      DNL, No Missing Codes Over Temperature

♦ 10-Bit, Quad, 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 (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: +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 MAX1258EVKIT)

Applications

   Closed-Loop Controls for Optical Components and Base Stations

   System Supervision and Control

   Data-Acquisition Systems