MCP4802/4812/4822
8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter
with Internal V
REF
and SPI Interface
Features
•
•
•
•
•
•
•
•
•
•
•
•
MCP4802: Dual 8-Bit Voltage Output DAC
MCP4812: Dual 10-Bit Voltage Output DAC
MCP4822: 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
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
Description
The MCP4802/4812/4822 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 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).
Each DAC channel can be operated in Active or
Shutdown mode 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, 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 MCP4802/4812/4822 devices are available in the
PDIP, SOIC and MSOP packages.
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
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
MCP48X2
V
DD
1
CS 2
SCK 3
SDI 4
8 V
OUTA
7 V
SS
6 V
OUTB
5 LDAC
MCP4802:
8-bit dual DAC
MCP4812:
10-bit dual DAC
MCP4822:
12-bit dual DAC
Note 1:
The products listed here have similar
AC/DC performances.
2010-2015 Microchip Technology Inc.
DS20002249B-page 1
MCP4802/4812/4822
Block Diagram
CS
SDI
SCK
LDAC
V
DD
V
SS
Input
Input
Register A Register B
2.048V
V
REF
DAC
A
Register
DAC
B
Register
Interface Logic
Power-on
Reset
String
DAC
A
String
DAC
B
Gain
Logic
Output
Op Amps
Output
Logic
Gain
Logic
V
OUTA
V
OUTB
DS20002249B-page 2
2010-2015 Microchip Technology Inc.
MCP4802/4812/4822
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 .......... 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
Input Voltage
Input Current
Sym
V
DD
I
DD
Min
2.7
—
Typ
—
415
Max
5.5
750
Units
V
µA
Conditions
All digital inputs are grounded,
all analog outputs (V
OUT
) are
unloaded. Code = 0x000h
Software Shutdown Current
Power-on Reset Threshold
DC Accuracy
MCP4802
Resolution
INL Error
DNL
MCP4812
Resolution
INL Error
DNL
MCP4822
Resolution
INL Error
DNL
Offset Error
Offset Error Temperature
Coefficient
Gain Error
Gain Error Temperature
Coefficient
Note 1:
2:
I
SHDN_SW
V
POR
—
—
3.3
2.0
6
—
µA
V
n
INL
DNL
n
INL
DNL
n
INL
DNL
V
OS
V
OS
/°C
g
E
G/°C
8
-1
-0.5
10
-3.5
-0.5
12
-12
-0.75
-1
—
—
-2
—
—
±0.125
±0.1
—
±0.5
±0.1
—
±2
±0.2
±0.02
0.16
-0.44
-0.10
-3
—
1
+0.5
—
3.5
+0.5
—
12
+0.75
1
—
—
2
—
Bits
LSb
LSb
Bits
LSb
LSb
Bits
LSb
LSb
ppm/°C
ppm/°C
Note 1
-45°C to +25°C
+25°C to +85°C
% of FSR Code = 0x000h
Note 1
Note 1
% of FSR Code = 0xFFFh,
not including offset error
ppm/°C
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
2010-2015 Microchip Technology Inc.
DS20002249B-page 3
MCP4802/4812/4822
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
Internal Reference Voltage
Temperature Coefficient
(Note
2)
Sym
V
REF
V
REF
/°C
Min
2.008
—
—
—
—
Typ
2.048
125
0.25
45
0.09
290
Max
2.088
325
0.65
160
0.32
—
Units
V
ppm/°C
LSb/°C
ppm/°C
LSb/°C
µV
p-p
Conditions
V
OUTA
when G = 1x and
Code = 0xFFFh
-40°C to 0°C
-40°C to 0°C
0°C to +85°C
0°C to +85°C
Code = 0xFFFh, G = 1x
Internal Voltage Reference (V
REF
)
Output Noise (V
REF
Noise)
E
NREF
(0.1-
10 Hz)
e
NREF
(1 kHz)
e
NREF
(10 kHz)
—
Output Noise Density
—
—
—
—
—
—
—
—
1.2
1.0
400
0.01 to
V
DD
– 0.04
66
0.55
15
4.5
—
—
—
—
—
—
24
—
µV/Hz
µV/Hz
Hz
V
Degree
(°)
V/µs
mA
µs
Code = 0xFFFh, G = 1x
Code = 0xFFFh, G = 1x
1/f Corner Frequency
Output Amplifier
Output Swing
Phase Margin
Slew Rate
Short Circuit Current
Settling Time
f
CORNER
V
OUT
PM
SR
I
SC
t
SETTLING
Accuracy is better than 1 LSb for
V
OUT
= 10 mV to (V
DD
–40 mV)
C
L
= 400 pF, R
L
=
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
—
—
<10
45
—
—
nV-s
nV-s
1 LSb change around major carry
(0111...1111 to
1000...0000)
Digital Feedthrough
Analog Crosstalk
Note 1:
2:
—
—
<10
<10
—
—
nV-s
nV-s
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
DS20002249B-page 4
2010-2015 Microchip Technology Inc.
MCP4802/4812/4822
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
Input Voltage
Input Current
Input Curren
Software Shutdown Current
Power-On Reset threshold
DC Accuracy
MCP4802
Resolution
INL Error
DNL
MCP4812
Resolution
INL Error
DNL
MCP4822
Resolution
INL Error
DNL
Offset Error
Offset Error Temperature
Coefficient
Gain Error
Gain Error Temperature
Coefficient
Internal Reference Voltage
Temperature Coefficient
(Note
2)
Sym
V
DD
I
DD
Min
2.7
—
Typ
—
440
Max
5.5
—
Units
V
µA
Conditions
All digital inputs are grounded,
all analog outputs (V
OUT
) are
unloaded. Code = 0x000h.
I
SHDN_SW
V
POR
—
—
5
1.85
—
—
µA
V
n
INL
DNL
n
INL
DNL
n
INL
DNL
V
OS
V
OS
/°C
g
E
G/°C
8
—
—
10
—
—
12
—
—
—
—
—
—
—
±0.25
±0.2
—
±1
±0.2
—
±4
±0.25
±0.02
-5
-0.10
-3
—
—
—
—
—
—
—
—
—
—
—
—
—
Bits
LSb
LSb
Bits
LSb
LSb
Bits
LSb
LSb
% of FSR
ppm/°C
% of FSR
ppm/°C
Note 1
Code = 0x000h
+25°C to +125°C
Code = 0xFFFh,
not including offset error
Note 1
Note 1
Internal Voltage Reference (V
REF
)
V
REF
V
REF
/°C
—
—
—
—
—
Output Noise (V
REF
Noise)
Output Noise Density
E
NREF
(0.1 – 10 Hz)
e
NREF
(1 kHz)
e
NREF
(10 kHz)
1/f Corner Frequency
Note 1:
2:
f
CORNER
—
—
—
—
2.048
125
0.25
45
0.09
290
1.2
1.0
400
—
—
—
—
—
—
—
—
—
V
ppm/°C
LSb/°C
ppm/°C
LSb/°C
µV
p-p
µV/
Hz
µV/
Hz
Hz
V
OUTA
when G = 1x and
Code = 0xFFFh
-40°C to 0°C
-40°C to 0°C
0°C to +85°C
0°C to +85°C
Code = 0xFFFh, G = 1x
Code = 0xFFFh, G = 1x
Code = 0xFFFh, G = 1x
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
2010-2015 Microchip Technology Inc.
DS20002249B-page 5
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
