MAX1221

` 12-Bit, 300ksps ADC
Analog Multiplexer with True-Differential Track/Hold (T/H)
16 Single-Ended Channels or 8 Differential Channels (Unipolar or Bipolar)
12 Single-Ended Channels or 6 Differential Channels (Unipolar or Bipolar)
8 Single-Ended Channels or 4 Differential Channels (Unipolar or Bipolar)
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
`12-Bit, Octal, 2s 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
` 25MHz, SPI/QSPI/MICROWIRE Serial Interface
` AutoShutdown Between Conversions
` Low-Power ADC
2.5mA at 300ksps
22A at 1ksps
0.2A at Shutdown
` Low-Power DAC: 1.5A
` Evaluation Kit Available (Order MAX1258EVKIT)

AV_DD to AGND .....................................................-0.3V to +6V
DGND to AGND.................................................-0.3V to +0.3V
DV_DD to AV_DD ..................................................-3.0V to +0.3V
Digital Inputs to DGND.........................................-0.3V to +6V
Digital Outputs to DGND ......................-0.3V to (DV_DD + 0.3V)
Analog Inputs, Analog Outputs and REF_
to AGND...............................................-0.3V to (AV_DD + 0.3V)
Maximum Current into Any Pin (except AGND, DGND, AV_DD,
DV_DD, and OUT_) ...........................................................50mA
Maximum Current into OUT_.........................................100mA
Continuous Power Dissipation (T_A = +70°C)
36-Pin Thin QFN (6mm x 6mm)
(derate 26.3mW/°C above +70°C)......................2105.3mW
40-Pin Thin QFN (6mm x 6mm)
(derate 26.3mW/°C above +70°C)......................2105.3mW
48-Pin Thin QFN (7mm x 7mm)
(derate 26.3mW/°C above +70°C)......................2105.3mW
Operating Temperature Range ...................-40°C to +85°C
Storage Temperature Range ....................-60°C to +150°C
Junction Temperature...............................................+150°C
Lead Temperature (soldering, 10s) ..........................+300°C

Note: If the package power dissipation is not exceeded, one output at a time may be shorted to AV_DD, DV_DD, AGND, or DGND indefinitely

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX1220MAX1223/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 8/12/16 inputchannel versions. The octal DAC outputs settle within 2.0s and the ADC has a 300ksps conversion rate.

All devices include an internal reference (2.5V or 4.096V) for both the ADC and DAC. Programmable reference modes 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 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 (MAX1221/MAX1223/MAX1257) and from +4.75V to +5.25V (MAX1220/MAX1222/ MAX1258). These devices consume 2.5mA at 300ksps throughput, only 22A at 1ksp throughput, and under 0.2A in the shutdown mode. The MAX1257/MAX1258 feature 12 GPIOs, while the MAX1220/MAX1221 offer 4 GPIOs that can be configured as inputs or outputs.

The MAX1220MAX1223 are available in 36-pin thin QFN packages. The MAX1257/MAX1258 are available in 48-pin thin QFN packages. All devices are specified over the -40°C to +85°C temperature range.