MCP4902/4912/4922
8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter
with SPI Interface
Features
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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
Description
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
V
REF
or 2 * V
REF
by setting the Gain Selection Option
bit (gain of 1 of 2).
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 power-
up.
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.
The MCP4902/4912/4922 devices are available in the
PDIP, SOIC and TSSOP packages.
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
MCP4801
MCP4811
MCP4821
MCP4802
MCP4812
MCP4822
MCP4901
MCP4911
MCP4921
MCP4902
MCP4912
MCP4922
DAC
No. of
Resolution ChannelS
8
10
12
8
10
12
8
10
12
8
10
12
1
1
1
2
2
2
1
1
1
2
2
2
External
Internal
(2.048V)
Voltage
Reference
(V
REF
)
Package Types
14-Pin PDIP, SOIC, TSSOP
V
DD
1
NC
2
CS
3
SCK
4
SDI
5
NC
6
NC
7
14
V
OUTA
MCP49X2
13
V
REFA
12
V
SS
11
V
REFB
10
V
OUTB
9
SHDN
8
LDAC
Note 1:
The products listed here have similar AC/
DC performances.
MCP4902:
8-bit dual DAC
MCP4912:
10-bit dual DAC
MCP4922:
12-bit dual DAC
2010 Microchip Technology Inc.
DS22250A-page 1
MICROCHIP [ MICROCHIP TECHNOLOGY ]
