MCP4901 Datasheet, PDF (1/50 Pages) Microchip Technology – 8/10/12-Bit Voltage Output Digital-to-Analog Converter with SPI Interface

MCP4901/4911/4921
8/10/12-Bit Voltage Output Digital-to-Analog Converter
with SPI Interface
Features
• 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
Applications
• 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
DAC
No. of
Resolution Channels
Voltage
Reference
(V_REF)
MCP4801
8
1
MCP4811
10
MCP4821
12
MCP4802
8
1
1
Internal
(2.048V)
2
MCP4812
10
2
MCP4822
12
2
MCP4901
8
1
MCP4911
10
MCP4921
12
1
External
1
MCP4902
8
2
MCP4912
10
2
MCP4922
12
2
Note: The products listed here have similar AC/DC
performances.
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 ktypical.
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.
Package Types
8-Pin PDIP, SOIC, MSOP
DFN-8 (2x3)^*
V_{DD 1}
CS 2
SCK ³
SDI 4
8 V_OUT V_DD 1
7 V_SS
CS 2
6 V_REF SCK 3
5 _{LDAC SDI} 4
8 V_OUT
EP ^{7 V}SS
9 _{6 VREF}
5 _LDAC
MCP4901: 8-bit single DAC
MCP4911: 10-bit single DAC
MCP4921: 12-bit single DAC
* Includes Exposed Thermal Pad (EP); see Table 3-1.
 2010 Microchip Technology Inc.
DS22248A-page 1