MCP4725A0T-E/CH Microchip Technology, MCP4725A0T-E/CH Datasheet - Page 13

• Manufacturer Part Number: MCP4725A0T-E/CH
• Description: IC DAC 12BIT W/I2C SOT23A-6
• Manufacturer: Microchip Technology

Specifications of MCP4725A0T-E/CH

• Number Of Converters: 1
• Package / Case: SOT-23-6
• Settling Time: 6µs
• Number Of Bits: 12
• Data Interface: I²C, Serial
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Resolution: 12 bit
• Interface Type: Serial (2-Wire, I2C)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP4725DM-PTPLS - BOARD DAUGHTER PICTAIL MCP4725
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MCP4725A0T-E/CHTR; MCP4725AOT-E/CHTR; MCP4725AOT-E/CHTR

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
V
DAC output amplifier drives this pin with a range of V
to V
3.2
V
at the V
DAC reference input. The power supply at the V
should be clean as possible for a good DAC
performance.
This pin requires an appropriate bypass capacitor of
about 0.1 µF (ceramic) to ground. An additional 10 µF
capacitor (tantalum) in parallel is also recommended to
further attenuate high frequency noise present in
application boards. The supply voltage (V
maintained in the 2.7V to 5.5V range for specified
operation.
V
device. The user must connect the V
plane through a low impedance connection. If an
analog ground path is available in the application PCB
(printed circuit board), it is highly recommended that
the V
isolated within an analog ground plane of the circuit
board.
3.3
SDA is the serial data pin of the I
pin is used to write or read the DAC register and
EEPROM data. The SDA pin is an open-drain N-chan
nel driver. Therefore, it needs a pull-up resistor from the
V
conditions, the data on the SDA pin must be stable
during the high period of the clock. The high or low
state of the SDA pin can only change when the clock
signal on the SCL pin is low. Refer to Section 7.0 “I
Serial Interface Communication” for more details of
I
© 2009 Microchip Technology Inc.
2
OUT
DD
SS
DD
C Serial Interface communication.
MCP4725
SOT-23
DD
is the ground pin and the current return path of the
is the power supply pin for the device. The voltage
line to the SDA pin. Except for START and STOP
is an analog output voltage from the DAC device.
SS
1
2
3
4
5
6
.
DD
PIN DESCRIPTIONS
Analog Output Voltage (V
Supply Voltage (V
pin be tied to the analog ground path or
Serial Data Pin (SDA)
pin is used as the supply input as well as the
PIN FUNCTION TABLE
Name
V
SDA
SCL
V
V
A0
OUT
SS
DD
DD
2
C interface. The SDA
Analog Output Voltage
Ground Reference
Supply Voltage
I
I
I
actively driven by the digital logic levels. The logic state of this pin determines what
the A0 bit of the I
2
2
2
C Serial Data
C Serial Clock Input
C Address Bit Selection pin (A0 bit). This pin can be tied to V
or V
SS
pin to a ground
Table
SS
DD
OUT
)
) must be
3-1.
)
DD
2
pin
C address bits should be.
2
SS
C
3.4
SCL is the serial clock pin of the I
MCP4725 acts only as a slave and the SCL pin accepts
only external serial clocks. The input data from the
Master device is shifted into the SDA pin on the rising
edges of the SCL clock and output from the MCP4725
occurs at the falling edges of the SCL clock. The SCL
pin is an open-drain N-channel driver. Therefore, it
needs a pull-up resistor from the V
pin. Refer to Section 7.0 “I
munication” for more details of I
communication.
3.5
This pin is used to select the A0 address bit by the user.
The user can tie this pin to V
(logic ‘1’), or can be actively driven by the digital logic
levels, such as the I
“Device Addressing” for more details of the address
bits.
Description
Serial Clock Pin (SCL)
Device Address Selection Pin (A0)
2
C Master Output. See Section 7.2
2
C Serial Interface Com-
MCP4725
SS
SS
2
or V
DD
(logic ‘0’), or V
C Serial Interface
DS22039D-page 13
2
C interface. The
line to the SCL
DD
, or can be
DD