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
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 ktypical.
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.
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
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
MCP49x1
V
DD
1
CS 2
SCK 3
SDI 4
8 V
OUT
7 V
SS
6 V
REF
5 LDAC
DFN-8 (2x3)
*
V
DD
1
CS 2
SCK 3
SDI 4
8 V
OUT
EP 7 V
SS
9 6 V
REF
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.
Note:
The products listed here have similar AC/DC
performances.
2010 Microchip Technology Inc.
DS22248A-page 1
MCP4901/4911/4921
Block Diagram
LDAC
CS
SDI
SCK
Interface Logic
Power-on
Reset
Input
Register
V
DD
V
SS
DAC
Register
V
REF
Buffer
Output
Op Amp
Output
Logic
String
DAC
Gain
Logic
V
OUT
DS22248A-page 2
2010 Microchip Technology Inc.
MCP4901/4911/4921
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
Supply Current
V
DD
I
DD
2.7
—
—
—
175
125
5.5
350
250
µA
µA
V
DD
= 5V
V
DD
= 3V
V
REF
input is unbuffered, all digital
inputs are grounded, all analog
outputs (V
OUT
) are unloaded.
Code = 0x000h
Power-on Reset circuit remains on
Sym
Min
Typ
Max
Units
Conditions
Software Shutdown Current I
SHDN_SW
Power-On-Reset Threshold
V
POR
DC Accuracy
MCP4901
Resolution
INL Error
DNL
MCP4911
Resolution
INL Error
DNL
MCP4921
Resolution
INL Error
DNL
Note 1:
2:
n
INL
DNL
n
INL
DNL
n
INL
DNL
—
—
3.3
2.0
6
—
µA
V
8
-1
-0.5
10
-3.5
-0.5
12
-12
-0.75
—
±0.125
±0.1
—
±0.5
±0.1
—
±2
±0.2
—
1
+0.5
—
3.5
+0.5
—
12
+0.75
Bits
LSb
LSb
Bits
LSb
LSb
Bits
LSb
LSb
Note 1
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.
DS22248A-page 3
MCP4901/4911/4921
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
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
V
REF
V
REF
R
VREF
C
VREF
f
VREF
f
VREF
Multiplier Mode –
Total Harmonic Distortion
Output Amplifier
Output Swing
V
OUT
—
0.01 to
V
DD
–
0.04
66
0.55
15
4.5
—
V
Accuracy is better than 1 LSb for
V
OUT
= 10 mV to (V
DD
– 40 mV)
THD
VREF
0.040
0
—
—
—
—
—
—
—
165
7
450
400
-73
V
DD
–
0.040
V
DD
—
—
—
—
—
V
V
k
pF
kHz
kHz
dB
V
REF
= 2.5V ±0.2Vp-p,
Unbuffered, G = 1
V
REF
= 2.5V ±0.2 Vp-p,
Unbuffered, G = 2
V
REF
= 2.5V ±0.2Vp-p,
Frequency = 1 kHz
Note 2
Code = 2048
V
REF
= 0.2 Vp-p, f = 100 Hz and
1 kHz
Unbuffered Mode
Sym
V
OS
V
OS
/°C
g
E
G/°C
Min
—
—
—
—
—
Typ
±0.02
0.16
-0.44
-0.10
-3
Max
1
—
—
1
—
Units
% of
FSR
ppm/°C
ppm/°C
% of
FSR
ppm/°C
Conditions
Code = 0x000h
-45°C to 25°C
+25°C to 85°C
Code = 0xFFFh, not including
offset error
Phase Margin
Slew Rate
Short Circuit Current
Settling Time
m
SR
I
SC
t
settling
—
—
—
—
—
—
24
—
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.
DS22248A-page 4
2010 Microchip Technology Inc.
MCP4901/4911/4921
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
V
DD
I
DD
2.7
—
—
200
5.5
—
µA
V
REF
input is unbuffered, all digi-
tal inputs are grounded, all analog
outputs (VOUT) are unloaded.
Code = 0x000h
Sym
Min
Typ
Max
Units
Conditions
Software Shutdown Current I
SHDN_SW
Power-on Reset Threshold
V
POR
DC Accuracy
MCP4901
Resolution
INL Error
DNL
MCP4911
Resolution
INL Error
DNL
MCP4921
Resolution
INL Error
DNL
Offset Error
—
—
5
1.85
—
—
µA
V
n
INL
DNL
n
INL
DNL
n
INL
DNL
V
OS
V
OS
/°C
g
E
G/°C
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
offset error
—
—
—
—
±0.02
-5
-0.10
-3
—
—
—
—
% of FSR
ppm/°C
% of FSR
ppm/°C
Offset Error Temperature
Coefficient
Gain Error
Gain Error Temperature
Coefficient
Input Amplifier (V
REF
Input)
Input Range – Buffered
Mode
V
REF
—
0.040 to
V
DD
-
0.040
—
174
7
450
400
—
V
Note 1
Code = 2048,
V
REF
= 0.2 Vp-p, f = 100 Hz and
1 kHz
Input Range – Unbuffered
Mode
Input Impedance
Input Capacitance –
Unbuffered Mode
Multiplying Mode
-3 dB Bandwidth
V
REF
R
VREF
C
VREF
f
VREF
f
VREF
0
—
—
—
—
V
DD
—
—
—
—
V
k
pF
kHz
kHz
V
REF
= 2.5V ±0.1 Vp-p,
Unbuffered, G = 1x
V
REF
= 2.5V ±0.1 Vp-p,
Unbuffered, G = 2x
Unbuffered Mode
Note 1:
2:
Guaranteed monotonic by design over all codes.
This parameter is ensured by design, and not 100% tested.
2010 Microchip Technology Inc.
DS22248A-page 5
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