MCP4801 Datasheet, PDF (1/48 Pages) Microchip Technology – 8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface

MCP4801/4811/4821
8/10/12-Bit Voltage Output Digital-to-Analog Converter
with Internal V_REF and SPI Interface
Features
• MCP4801: 8-Bit Voltage Output DAC
• MCP4811: 10-Bit Voltage Output DAC
• MCP4821: 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
• 2.048V Internal Voltage Reference
• 50 ppm/°C V_REF Temperature Coefficient
• 2.7V to 5.5V Single-Supply Operation
• Extended Temperature Range: -40°C to +125°C
Applications
• Set Point or Offset Trimming
• Sensor Calibration
• Precision Selectable Voltage Reference
• Portable Instrumentation (Battery-Powered)
• Calibration of Optical Communication Devices
Related Products⁽¹⁾
P/N
DAC
No. of
Resolution Channel
Voltage
Reference
(V_REF)
MCP4801
8
1
MCP4811
10
1
MCP4821
12
MCP4802
8
1
Internal
2
(2.048V)
MCP4812
10
2
MCP4822
12
2
MCP4901
8
1
MCP4911
10
1
MCP4921
12
MCP4902
8
1
External
2
MCP4912
10
2
MCP4922
12
2
Note 1: The products listed here have similar
AC/DC performances.
Description
The MCP4801/4811/4821 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 devices have a high precision internal voltage
reference (V_REF = 2.048V). The user can configure the
full-scale range of the device to be 2.048V or 4.096V by
setting the Gain Selection Option bit (gain of 1 of 2).
The devices can be operated in Active or Shutdown
mode by setting a Configuration register bit or using the
SHDN pin. In Shutdown mode, most of the internal
circuits, including the output amplifier, are turned off for
power savings, while the amplifier output (V_OUT) stage is
configured to present a known high resistance output
load (500 k typical.
The devices include double-buffered registers,
allowing a synchronous update 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 DNL error, low ratio
metric temperature coefficient 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 MCP4801/4811/4821 devices are available in the
PDIP, SOIC, MSOP and DFN packages.
 2010 Microchip Technology Inc.
DS22244B-page 1