MCP4901/4911/4921
8/10/12-Bit Voltage Output Digital-to-Analog Converter
with SPI Interface
Features
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MCP4901: 8-Bit Voltage Output DAC
MCP4911: 10-Bit Voltage Output DAC
MCP4921: 12-Bit Voltage Output DAC
Rail-to-Rail Output
SPI Interface with 20 MHz Clock Support
Simultaneous Latching of the DAC Output
with LDAC Pin
Fast Settling Time of 4.5 µs
Selectable Unity or 2x Gain Output
External Voltage Reference Input
External Multiplier Mode
2.7V to 5.5V Single-Supply Operation
Extended Temperature Range: -40°C to +125°C
Description
The MCP4901/4911/4921 devices are single channel
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
an 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 the device by setting the Con-
figuration Register bit. In Shutdown mode, most of the
internal circuits 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 the DAC output 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 Differential Non-Linear-
ity (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 MCP4901/4911/4921 devices are available in the
PDIP, SOIC, MSOP and DFN 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
P/N
MCP4801
MCP4811
MCP4821
MCP4802
MCP4812
MCP4822
MCP4901
MCP4911
MCP4921
MCP4902
MCP4912
MCP4922
DAC
Resolution
8
10
12
8
10
12
8
10
12
8
10
12
No. of
Channels
1
1
1
2
2
2
1
1
1
2
2
2
External
Internal
(2.048V)
Voltage
Reference
(V
REF
)
Package Types
8-Pin PDIP, SOIC, MSOP
MCP49x1
V
DD
1
CS 2
SCK 3
SDI 4
8 V
OUT
7 V
SS
6 V
REF
5 LDAC
DFN-8 (2x3)
*
V
DD
1
CS 2
SCK 3
SDI 4
8 V
OUT
EP 7 V
SS
9 6 V
REF
5 LDAC
MCP4901:
8-bit single DAC
MCP4911:
10-bit single DAC
MCP4921:
12-bit single DAC
* Includes Exposed Thermal Pad (EP); see
Note:
The products listed here have similar AC/DC
performances.
2010 Microchip Technology Inc.
DS22248A-page 1