MAX1220/MAX1257/MAX1258 12-Bit, Multichannel ADCs/DACs
with FIFO, Temperature Sensing,
and GPIO Ports
EVALUATION KIT AVAILABLE
General Description
The MAX1220/MAX1257/MAX1258 is a highly integrat-
ed system monitoring and control solution which
includes a 16-channel (MAX1257/MAX1258) or 8-ch
(MAX1220) 12-bit Analog to Digital Converter (ADC),
twelve 12-bit Digital to Analog Converters (DACs), an
internal reference, an internal temp sensor, a 4-bit
(MAX1220) or 12-bit (MAX1257/MAX1258) GPIO port,
and a 25MHz SPI-/QSPI™-/MICROWIRE®- compatible
serial interface.
The MAX1220 is available in a 36-pin TQFN package.
The MAX1257/MAX1258 are available in 48-pin TQFN
package. All devices are specified over the -40°C to
+85°C temperature range.
Applications
•Controls for Optical Components
•Base-Station Control Loops
•System Supervision and Control
•Data-Acquisition Systems
Benefits and Features
•Reduce Parts Count and Board Space with Fully
Integrated System Monitor and Controller
•Monitors 8 (MAX1220) or 16 Voltages
(MAX1257/MAX1258) Using 12-Bit, 225ksps ADC
•Controls 8 Output Voltage Level with 12-Bit, Octal,
2µs Settling DAC with Ultra-Low Glitch Energy
(4n x VS)
•Measures Temperature with Internal ±1°C
Accurate Temperature Sensor
•Options for Using Either Internal 2.5V (MAX1257)
Reference, 4.096V (MAX1220/MAX1258)
Reference or External Reference
•Includes 4 (MAX1220) or 12 (MAX1257/1258)
GPIOs
•Lower Processor Requirements and Minimize Power
Consumption and Heat Dissipation
•On-Chip FIFO, Channel-Scan Mode and Data
Averaging
•Autoshutdown Between Conversions
•Low-Power ADC
2.5mA at 225ksps
22µA at 1ksps
•Low-Power DAC: 1.5mA
•TQFN Package with Exposed Pad
•Enable Maximum Dynamic Range with Availability of
2 Analog Power Supply Options: +2.7V to +3.6V
(MAX1257) or +4.75V to +5.25V
(MAX1220/MAX1258)
Note: All devices are specified over the -40°C to +85°C
operating range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
**
Number of resolution bits refers to both DAC and ADC.
Pin Configurations appear at end of data sheet.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering Information/Selector Guide