MCP4725
12-Bit Digital-to-Analog Converter with EEPROM Memory
in SOT-23-6
Features
DESCRIPTION
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The MCP4725 is a low-power, high accuracy, single
channel, 12-bit buffered voltage output Digital-toAnalog Convertor (DAC) with non-volatile memory
(EEPROM). Its on-board precision output amplifier
allows it to achieve rail-to-rail analog output swing.
12-Bit Resolution
On-Board Non-Volatile Memory (EEPROM)
±0.2 LSB DNL (typical)
External A0 Address Pin
Normal or Power-Down Mode
Fast Settling Time: 6 µs (typical)
External Voltage Reference (VDD)
Rail-to-Rail Output
Low Power Consumption
Single-Supply Operation: 2.7V to 5.5V
I2CTM Interface:
- Eight Available Addresses
- Standard (100 kbps), Fast (400 kbps), and
High-Speed (3.4 Mbps) Modes
• Small 6-lead SOT-23 Package
• Extended Temperature Range: -40°C to +125°C
Applications
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Set Point or Offset Trimming
Sensor Calibration
Closed-Loop Servo Control
Low Power Portable Instrumentation
PC Peripherals
Data Acquisition Systems
The MCP4725 has a two-wire I2C™ compatible serial
interface for standard (100 kHz), fast (400 kHz), or high
speed (3.4 MHz) mode.
Power-on
Reset
2
I C Interface Logic
Charge
Pump
Input
Register
DAC Register
EEPROM
Resistive
String DAC
VSS
SDA
Op
Amp
Power-down
Control
VDD
SCL
The device includes a Power-On-Reset (POR) circuit to
ensure reliable power-up and an on-board charge
pump for the EEPROM programming voltage. The
DAC reference is driven from VDD directly. In powerdown mode, the output amplifier can be configured to
present a known low, medium, or high resistance
output load.
The MCP4725 has an external A0 address bit selection
pin. This A0 pin can be tied to VDD or VSS of the user’s
application board.
Block Diagram
A0
The DAC input and configuration data can be
programmed to the non-volatile memory (EEPROM) by
the user using I2C interface command. The non-volatile
memory feature enables the DAC device to hold the
DAC input code during power-off time, and the DAC
output is available immediately after power-up. This
feature is very useful when the DAC device is used as
a supporting device for other devices in the network.
The MCP4725 is an ideal DAC device where design
simplicity and small footprint is desired, and for
applications requiring the DAC device settings to be
saved during power-off time.
The device is available in a small 6-pin SOT-23
package.
Package Type
SOT-23-6
VOUT
1
VSS
2
VDD
3
MCP4725
6
A0
5
SCL
4
SDA
VOUT
© 2009 Microchip Technology Inc.
DS22039D-page 1
MCP4725
NOTES:
DS22039D-page 2
© 2009 Microchip Technology Inc.
MCP4725
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
these or any other conditions above those indicated in the
operation listings of this specification is not implied. Exposure
to maximum rating conditions for extended periods may affect
device reliability
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 ................ ≥ 6 kV HBM, ≥ 400V MM
Maximum Junction Temperature (TJ) ......................... +150°C
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all parameters apply at VDD = + 2.7V to 5.5V, VSS = 0V,
RL = 5 kΩ from VOUT to VSS, CL = 100 pF, TA = -40°C to +125°C. Typical values are at +25°C.
Parameter
Sym
Min
Operating Voltage
VDD
2.7
Supply Current
IDD
—
Power-Down Current
IDDP
Power-On-Reset
Threshold Voltage
Typ
Max
Units
Conditions
5.5
V
210
400
µA
Digital input pins are
grounded, Output pin (VOUT)
is not connected (unloaded),
Code = 000h
—
0.06
2.0
µA
VDD = 5.5V
VPOR
—
2
—
V
Power Requirements
DC Accuracy
Resolution
n
12
—
—
Bits
Code Range = 000h to FFFh
INL Error
INL
—
±2
±14.5
LSB
Note 1
DNL
DNL
-0.75
Offset Error
VOS
±0.2
±0.75
LSB
0.02
0.75
% of FSR
—
±1
—
ppm/°C
-45°C to +25°C
—
±2
—
ppm/°C
+25°C to +85°C
GE
-2
-0.1
2
% of FSR
ΔGE/°C
—
-3
—
ppm/°C
Phase Margin
pM
—
66
—
Degree(°)
Capacitive Load Stability
CL
—
—
1000
pF
Slew Rate
SR
—
0.55
—
V/µs
Short Circuit Current
ISC
—
15
24
mA
VDD = 5V, VOUT = Grounded
Output Voltage Settling
Time
TS
—
6
—
µs
Note 3
Offset Error Drift
ΔVOS/°C
Gain Error
Gain Error Drift
Note 1
Code = 000h
Code = FFFh,
Offset error is not included.
Output Amplifier
Note 1:
2:
3:
4:
CL = 400 pF, RL = ∞
RL = 5 kΩ, Note 2
Test Code Range: 100 to 4000.
This parameter is ensure by design and not 100% tested.
Within 1/2 LSB of the final value when code changes from 1/4 to 3/4 (400h to C00h) of full scale range.
Logic state of external address selection pin (A0 pin).
© 2009 Microchip Technology Inc.
DS22039D-page 3
MCP4725
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all parameters apply at VDD = + 2.7V to 5.5V, VSS = 0V,
RL = 5 kΩ from VOUT to VSS, CL = 100 pF, TA = -40°C to +125°C. Typical values are at +25°C.
Parameter
Power Up Time
Sym
Typ
Max
Units
Conditions
—
2.5
—
µs
VDD = 5V
—
5
—
µs
VDD = 3V
Exit Power-down Mode,
(Started from falling edge of
ACK pulse)
—
1
—
Ω
Normal mode (VOUT to VSS)
—
1
—
kΩ
Power-Down Mode 1
(VOUT to VSS)
—
100
—
kΩ
Power-Down Mode 2
(VOUT to VSS)
—
500
—
kΩ
Power-Down Mode 3
(VOUT to VSS)
1
—
—
V/ms
Validation only.
Major Code Transition
Glitch
—
45
—
nV-s
1 LSB change around major
carry (from 800h to 7FFh)
(Note 2)
Digital Feedthrough
—
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