The MAX1221/MAX1223/MAX1343 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 MAX1221/MAX1343 offer four GPIOs that can be configured as inputs or outputs.
The MAX1221/MAX1223/MAX1343 are available in 36-pin thin QFN packages. All devices are specified over the -40°C to +85°C temperature range.
Key Features
Applications/Uses
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)
Eight Single-Ended Channels or Four Differential Channels (Unipolar or Bipolar) (MAX1221/MAX1343)
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
12-Bit, Octal, 2µs Settling DAC (MAX1221/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 AVDD 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
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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