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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
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
P/N
DAC
No. of
Resolution Channels
Voltage
Reference
(VREF)
MCP4801
8
1
MCP4811
MCP4821
MCP4802
10
12
8
1
1
Internal
(2.048V)
2
MCP4812
10
2
MCP4822
12
2
MCP4901
8
1
MCP4911
MCP4921
10
12
1
External
1
MCP4902
8
2
MCP4912
10
2
MCP4922
12
2
Note: The products listed here have similar AC/DC
performances.
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
VREF or 2*VREF 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 ktypical.
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.
Package Types
8-Pin PDIP, SOIC, MSOP
DFN-8 (2x3)*
VDD 1
CS 2
SCK 3
SDI 4
8 VOUT VDD 1
7 VSS
CS 2
6 VREF SCK 3
5 LDAC SDI 4
8 VOUT
EP 7 VSS
9 6 VREF
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.
2010 Microchip Technology Inc.
DS22248A-page 1

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MCP4901/4911/4921
Block Diagram
LDAC CS SDI SCK
VREF
Interface Logic
Input
Register
DAC
Register
Power-on
Reset
VDD
VSS
Buffer
String
DAC
Output
Op Amp
Output
Logic
Gain
Logic
VOUT
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DS22248A-page 2
2010 Microchip Technology Inc.

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MCP4901/4911/4921
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1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VDD ............................................................................................................. 6.5V
All inputs and outputs w.r.t ................VSS –0.3V to VDD+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 (TJ) . .........................+150°C
† 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.
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = 2.048V, Output Buffer Gain
(G) = 2x, RL = 5 kto GND, CL = 100 pF TA = -40 to +85°C. Typical values are at +25°C.
Parameters
Sym Min Typ Max Units
Conditions
Power Requirements
Operating Voltage
Supply Current
VDD 2.7 —
5.5
IDD
— 175
350
— 125
250
µA VDD = 5V
µA VDD = 3V
VREF input is unbuffered, all digital
inputs are grounded, all analog
outputs (VOUT) are unloaded.
Code = 0x000h
Software Shutdown Current ISHDN_SW
Power-On-Reset Threshold VPOR
DC Accuracy
3.3
2.0
6
µA Power-on Reset circuit remains on
V
MCP4901
Resolution
n
8—
Bits
INL Error
INL
-1 ±0.125
1
LSb
DNL
DNL
-0.5 ±0.1
+0.5
LSb Note 1
MCP4911
Resolution
n 10 — — Bits
INL Error
INL -3.5 ±0.5
3.5
LSb
DNL
DNL
-0.5 ±0.1
+0.5
LSb Note 1
MCP4921
Resolution
INL Error
n 12 — — Bits
INL -12 ±2 12 LSb
DNL
DNL -0.75 ±0.2 +0.75
LSb Note 1
Note 1: Guaranteed monotonic by design over all codes.
2: This parameter is ensured by design, and not 100% tested.
2010 Microchip Technology Inc.
DS22248A-page 3

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MCP4901/4911/4921
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ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = 2.048V, Output Buffer Gain
(G) = 2x, RL = 5 kto GND, CL = 100 pF TA = -40 to +85°C. Typical values are at +25°C.
Parameters
Sym Min Typ Max Units
Conditions
Offset Error
VOS — ±0.02 1
% of Code = 0x000h
FSR
Offset Error Temperature VOS/°C — 0.16
— ppm/°C -45°C to 25°C
Coefficient
— -0.44 — ppm/°C +25°C to 85°C
Gain Error
gE — -0.10 1
% of Code = 0xFFFh, not including
FSR offset error
Gain Error Temperature
Coefficient
G/°C —
-3
— ppm/°C
Input Amplifier (VREF Input)
Input Range – Buffered
Mode
Input Range – Unbuffered
Mode
VREF
VREF
0.040
0
VDD
0.040
VDD
V Note 2
Code = 2048
V VREF = 0.2 Vp-p, f = 100 Hz and
1 kHz
Input Impedance
Input Capacitance –
Unbuffered Mode
RVREF — 165
CVREF
7
kUnbuffered Mode
pF
Multiplier Mode
-3 dB Bandwidth
fVREF — 450
kHz VREF = 2.5V ±0.2Vp-p,
Unbuffered, G = 1
fVREF — 400
kHz VREF = 2.5V ±0.2 Vp-p,
Unbuffered, G = 2
Multiplier Mode –
Total Harmonic Distortion
THDVREF
-73
dB VREF = 2.5V ±0.2Vp-p,
Frequency = 1 kHz
Output Amplifier
Output Swing
VOUT
— 0.01 to
VDD
0.04
V Accuracy is better than 1 LSb for
VOUT = 10 mV to (VDD – 40 mV)
Phase Margin
m — 66
— Degrees
Slew Rate
SR — 0.55 —
V/µs
Short Circuit Current
Settling Time
ISC
tsettling
15
4.5
24
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
— 10 — nV-s
Major Code Transition
Glitch
— 45 — nV-s 1 LSB change around major carry
(0111...1111 to 1000...0000)
Digital Feedthrough
— 10 — nV-s
Analog Crosstalk
— 10 — nV-s
Note 1: Guaranteed monotonic by design over all codes.
2: This parameter is ensured by design, and not 100% tested.
DS22248A-page 4
2010 Microchip Technology Inc.

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MCP4901/4911/4921
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ELECTRICAL CHARACTERISTIC WITH EXTENDED TEMPERATURE
Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = 2.048V, Output Buffer Gain
(G) = 2x, RL = 5 kto GND, CL = 100 pF. Typical values are at +125°C by characterization or simulation.
Parameters
Sym Min Typ Max
Units
Conditions
Power Requirements
Input Voltage
Input Current
VDD
2.7
5.5
IDD — 200 —
µA
Software Shutdown Current ISHDN_SW
Power-on Reset Threshold VPOR
DC Accuracy
MCP4901
Resolution
n
INL Error
INL
DNL
DNL
MCP4911
Resolution
n
INL Error
INL
DNL
DNL
MCP4921
Resolution
n
INL Error
INL
DNL
DNL
Offset Error
Offset Error Temperature
Coefficient
VOS
VOS/°C
Gain Error
gE
8
10
12
Gain Error Temperature
Coefficient
G/°C
Input Amplifier (VREF Input)
Input Range – Buffered
Mode
VREF
5
1.85
±0.25
±0.2
±1
±0.2
±4
±0.25
±0.02
-5
-0.10
-3
0.040 to
VDD-
0.040
µA
V
Bits
LSb
LSb
Bits
LSb
LSb
Bits
LSb
LSb
% of FSR
ppm/°C
% of FSR
ppm/°C
V
Input Range – Unbuffered
Mode
Input Impedance
Input Capacitance –
Unbuffered Mode
Multiplying Mode
-3 dB Bandwidth
VREF
RVREF
CVREF
fVREF
fVREF
0
— VDD
174 —
7—
450 —
400 —
V
k
pF
kHz
kHz
Note 1: Guaranteed monotonic by design over all codes.
2: This parameter is ensured by design, and not 100% tested.
VREF input is unbuffered, all digi-
tal inputs are grounded, all analog
outputs (VOUT) are unloaded.
Code = 0x000h
Note 1
Note 1
Note 1
Code = 0x000h
+25°C to +125°C
Code = 0xFFFh, not including
offset error
Note 1
Code = 2048,
VREF = 0.2 Vp-p, f = 100 Hz and
1 kHz
Unbuffered Mode
VREF = 2.5V ±0.1 Vp-p,
Unbuffered, G = 1x
VREF = 2.5V ±0.1 Vp-p,
Unbuffered, G = 2x
2010 Microchip Technology Inc.
DS22248A-page 5