MCP4902 Datasheet, PDF (1/48 Pages) Microchip Technology – 8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter with SPI Interface

MCP4902/4912/4922
8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter
with SPI Interface
Features
• 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
• 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
MCP4801
8
1
MCP4811
10
1
MCP4821
12
1
MCP4802
8
2
Voltage
Reference
(V_REF)
Internal
(2.048V)
MCP4812
10
2
MCP4822
12
2
MCP4901
8
MCP4911
10
MCP4921
12
MCP4902
8
MCP4912
10
1
1
1
External
2
2
MCP4922
12
2
Note 1: The products listed here have similar AC/
DC performances.
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 ktypical.
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.
Package Types
14-Pin PDIP, SOIC, TSSOP
V_{DD 1}
NC 2
CS 3
SCK 4
SDI 5
NC 6
14 V_OUTA
13 V_REFA
12 V_SS
11 V_REFB
10 V_OUTB
9 SHDN
NC 7
8 LDAC
MCP4902: 8-bit dual DAC
MCP4912: 10-bit dual DAC
MCP4922: 12-bit dual DAC
 2010 Microchip Technology Inc.
DS22250A-page 1