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
MCP4902/4912/4922
Block Diagram
LDAC
CS
SDI
SCK
Interface Logic
Power-on
Reset
V
DD
Input
Register A
Input
Register B
DAC
B
Register
V
SS
DAC
A
Register
V
REF
A
Buffer
Gain
Logic
String
DAC
A
String
DAC
B
V
REF
B
Buffer
Gain
Logic
Output
Op Amps
Output
Logic
V
OUTA
SHDN
V
OUTB
DS22250A-page 2
2010 Microchip Technology Inc.
MCP4902/4912/4922
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational listings of this specification
is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
Absolute Maximum Ratings †
V
DD
....................................................................... 6.5V
All inputs and outputs w.r.t ..... V
SS
–0.3V to V
DD
+0.3V
Current at Input Pins ......................................... ±2 mA
Current at Supply Pins .................................... ±50 mA
Current at Output Pins .................................... ±25 mA
Storage temperature .......................... -65°C to +150°C
Ambient temp. with power applied ..... -55°C to +125°C
ESD protection on all pins
4
kV (HBM),
400V
(MM)
Maximum Junction Temperature (T
J
)................+150°C
ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.048V, Output Buffer Gain (G) = 2x, R
L
= 5 k to
GND, C
L
= 100 pF T
A
= -40 to +85°C. Typical values are at +25°C.
Parameters
Power Requirements
Operating Voltage
Operating CurrentInput
Cur-
rent
Sym
V
DD
I
DD
Min
2.7
—
—
Typ
—
350
250
Max
5.5
700
500
Units
V
µA
µA
Conditions
V
DD
= 5V
V
DD
= 3V
V
REF
input is unbuffered, all digital
inputs are grounded, all analog
outputs (V
OUT
) are unloaded.
Code = 000h.
Power-on Reset circuit is turned
off
Power-on Reset circuit stays on
Hardware Shutdown Current
Software Shutdown Current
Power-on-Reset Threshold
DC Accuracy
MCP4902
Resolution
INL Error
DNL
MCP4912
Resolution
INL Error
DNL
MCP4922
Resolution
INL Error
DNL
Offset Error
Note 1:
2:
I
SHDN
I
SHDN_SW
V
POR
—
—
—
0.3
3.3
2.0
2
6
—
µA
µA
V
n
INL
DNL
n
INL
DNL
n
INL
DNL
V
OS
8
-1
-0.5
10
-3.5
-0.5
12
-12
-0.75
—
—
±0.125
±0.1
—
±0.5
±0.1
—
±2
±0.2
±0.02
—
1
+0.5
—
3.5
+0.5
—
12
+0.75
1
Bits
LSb
LSb
Bits
LSb
LSb
Bits
LSb
LSb
% of
FSR
Note 1
Code = 0x000h
Note 1
Note 1
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
2010 Microchip Technology Inc.
DS22250A-page 3
MCP4902/4912/4922
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.048V, Output Buffer Gain (G) = 2x, R
L
= 5 k to
GND, C
L
= 100 pF T
A
= -40 to +85°C. Typical values are at +25°C.
Parameters
Offset Error Temperature
Coefficient
Gain Error
Gain Error Temperature
Coefficient
Input Amplifier (V
REF
Input)
Input Range – Buffered
Mode
Input Range – Unbuffered
Mode
Input Impedance
Input Capacitance –
Unbuffered Mode
Multiplier Mode -3 dB
Bandwidth
Sym
V
OS
/°C
g
E
G/°C
Min
—
—
—
—
Typ
0.16
-0.44
-0.10
-3
Max
—
—
1
—
Units
ppm/°C
ppm/°C
% of
FSR
ppm/°C
Conditions
-45°C to 25°C
+25°C to 85°C
Code = 0xFFFh, not including off-
set error
V
REF
V
REF
R
VREF
C
VREF
f
VREF
f
VREF
0.040
0
—
—
—
—
—
—
—
165
7
450
400
-73
V
DD
– 0.040
V
DD
—
—
—
—
—
V
V
k
pF
kHz
kHz
dB
Note 2
Code = 2048
V
REF
= 0.2V p-p, f = 100 Hz and
1 kHz
Unbuffered Mode
V
REF
= 2.5V ±0.2Vp-p,
Unbuffered, G = 1x
V
REF
= 2.5V ±0.2 Vp-p,
Unbuffered, G = 2x
V
REF
= 2.5V ±0.2Vp-p,
Frequency = 1 kHz
Accuracy is better than 1 LSb for
V
OUT
= 10 mV to (V
DD
– 40 mV)
Multiplier Mode –
Total Harmonic Distortion
Output Amplifier
Output Swing
Phase Margin
Slew Rate
Short Circuit Current
Settling Time
THD
VREF
V
OUT
m
SR
I
SC
t
settling
—
—
—
—
—
0.01 to
V
DD
– 0.04
66
0.55
15
4.5
—
—
—
24
—
V
degrees
V/µs
mA
µs
Within 1/2 LSb of final value from
1/4 to 3/4 full-scale range
Dynamic Performance (Note 2)
DAC-to-DAC Crosstalk
Major Code Transition Glitch
Digital Feedthrough
Analog Crosstalk
Note 1:
2:
—
—
—
—
10
45
10
10
—
—
—
—
nV-s
nV-s
nV-s
nV-s
1 LSb change around major carry
(0111...1111 to
1000...0000)
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
DS22250A-page 4
2010 Microchip Technology Inc.
MCP4902/4912/4922
ELECTRICAL CHARACTERISTIC WITH EXTENDED TEMPERATURE
Electrical Specifications:
Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.048V, Output Buffer Gain (G) = 2x, R
L
= 5 k to
GND, C
L
= 100 pF. Typical values are at +125°C by characterization or simulation.
Parameters
Power Requirements
Operating Voltage
Operating Current
Sym
V
DD
I
DD
Min
2.7
—
Typ
—
400
Max
5.5
—
Units
V
µA
Conditions
V
REF
input is unbuffered, all digi-
tal inputs are grounded, all analog
outputs (V
OUT
) are unloaded.
Code=000h
POR circuit is turned-off
POR circuit stays turned-on
Hardware Shutdown
Current
I
SHDN
—
—
—
1.5
5
1.85
—
—
—
µA
µA
V
Software Shutdown Current I
SHDN_SW
Power-On Reset threshold
V
POR
DC Accuracy
MCP4902
Resolution
INL Error
DNL
MCP4912
Resolution
INL Error
DNL
MCP4922
Resolution
INL Error
DNL
Offset Error
Offset Error Temperature
Coefficient
Gain Error
Gain Error Temperature
Coefficient
Input Amplifier (V
REF
Input)
Input Range – Buffered
Mode
V
REF
n
INL
DNL
V
OS
V
OS
/°C
g
E
G/°C
n
INL
DNL
n
INL
DNL
8
—
±0.25
±0.2
—
Bits
LSb
LSb
Note 1
10
—
±1
±0.2
—
Bits
LSb
LSb
Note 1
12
—
±4
±0.25
—
Bits
LSb
LSb
Note 1
Code 0x000h
+25°C to +125°C
Code = 0xFFFh, not including off-
set error
—
—
—
—
±0.02
-5
-0.10
-3
—
—
—
—
% of FSR
ppm/°C
% of FSR
ppm/°C
—
0.040 to
V
DD
– 0.040
—
V
Note 1
Code = 2048,
V
REF
= 0.2V p-p, f = 100 Hz and
1 kHz
Input Range – Unbuffered
Mode
Input Impedance
Input Capacitance –
Unbuffered Mode
Note 1:
2:
V
REF
R
VREF
C
VREF
0
—
—
—
174
7
V
DD
—
—
V
k
pF
Unbuffered mode
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
2010 Microchip Technology Inc.
DS22250A-page 5
