MCP4902/4912/4922
8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter
with SPI Interface
Features
Description
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The MCP4902/4912/4922 devices are dual 8-bit,
10-bit, and 12-bit buffered voltage output
Digital-to-Analog Converters (DACs), respectively. The
devices operate from a single 2.7V to 5.5V supply with
SPI compatible Serial Peripheral Interface. The user
can configure the full-scale range of the device to be
VREF or 2 * VREF by setting the Gain Selection Option
bit (gain of 1 of 2).
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MCP4902: Dual 8-Bit Voltage Output DAC
MCP4912: Dual 10-Bit Voltage Output DAC
MCP4922: Dual 12-Bit Voltage Output DAC
Rail-to-Rail Output
SPI Interface with 20 MHz Clock Support
Simultaneous Latching of the Dual DACs
with LDAC pin
Fast Settling Time of 4.5 µs
Selectable Unity or 2x Gain Output
External Voltage Reference Inputs
External Multiplier Mode
2.7V to 5.5V Single-Supply Operation
Extended Temperature Range: -40°C to +125°C
Applications
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Set Point or Offset Trimming
Precision Selectable Voltage Reference
Motor Control Feedback Loop
Digitally-Controlled Multiplier/Divider
Calibration of Optical Communication Devices
Related Products(1)
P/N
DAC
No. of
Resolution ChannelS
Voltage
Reference
(VREF)
The user can shut down both DAC channels by using
SHDN pin or shut down the DAC channel individually
by setting the Configuration register bits. In Shutdown
mode, most of the internal circuits in the shutdown
channel are turned off for power savings and the output
amplifier is configured to present a known high
resistance output load (500 ktypical.
The devices include double-buffered registers,
allowing synchronous updates of two DAC outputs,
using the LDAC pin. These devices also incorporate a
Power-on Reset (POR) circuit to ensure reliable powerup.
The devices utilize a resistive string architecture, with
its inherent advantages of low DNL error and fast
settling time. These devices are specified over the
extended temperature range (+125°C).
The devices provide high accuracy and low noise
performance for consumer and industrial applications
where calibration or compensation of signals (such as
temperature, pressure and humidity) are required.
MCP4801
8
1
MCP4811
10
1
MCP4821
12
1
MCP4802
8
2
MCP4812
10
2
MCP4822
12
2
VDD 1
14 VOUTA
13 VREFA
Internal
(2.048V)
The MCP4902/4912/4922 devices are available in the
PDIP, SOIC and TSSOP packages.
Package Types
14-Pin PDIP, SOIC, TSSOP
8
1
NC 2
MCP4911
10
1
CS 3
External
SCK 4
MCP4921
12
1
MCP4902
8
2
SDI 5
2
NC 6
2
NC 7
MCP4912
MCP4922
10
12
Note 1: The products listed here have similar AC/
DC performances.
2010 Microchip Technology Inc.
MCP49X2
MCP4901
12 VSS
11 VREFB
10 VOUTB
9 SHDN
8 LDAC
MCP4902: 8-bit dual DAC
MCP4912: 10-bit dual DAC
MCP4922: 12-bit dual DAC
DS22250A-page 1
