MAX1223 Datasheet

• 12-Bit, 225ksps ADC
  • Analog Multiplexer with True-Differential Track/Hold (T/H)
  • 12 Single-Ended Channels or Six Differential Channels (Unipolar or Bipolar) (MAX1223)
  • Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
• 12-Bit, Octal, 2µs Settling DAC (MAX1223)
  • 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
• 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 +5.25V
• 2.7V to AV_DD Digital Supply
• 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)

• Closed-Loop Controls for Optical Components and Base Stations
• Data Acquisition Systems
• System Supervision and Control

The MAX1223 integrate a multichannel, 12-bit, analog-to-digital converter (ADC) and a 12-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 12 or an eight input-channel version. The DAC outputs settle within 2.0µs, and the ADC has a 225ksps conversion rate.

All devices include an internal reference (2.5V) 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 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 +5.25V. The devices consume 2.5mA at 225ksps throughput, only 22µA at 1ksps throughput, and under 0.2µA in the shutdown mode.

The MAX1223 are available in 36-pin thin QFN packages. All devices are specified over the -40°C to +85°C temperature range.