MCP4725EV Microchip Technology, MCP4725EV Datasheet - Page 10

• Manufacturer Part Number: MCP4725EV
• Description: BOARD EVAL FOR MCP4725
• Manufacturer: Microchip Technology

Specifications of MCP4725EV

• Number Of Dac's: 1
• Number Of Bits: 12
• Outputs And Type: 1, Single Ended
• Sampling Rate (per Second): 100k ~ 3.4M
• Data Interface: I²C
• Settling Time: 6µs
• Dac Type: Voltage
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: MCP4725
• Processor To Be Evaluated: MCP4725
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP4725
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
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
DS22039C-page 10
2
OUT
DD
SS
DD
C Serial Interface communication.
Pin No.
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
SS
is an analog output voltage from the DAC device.
.
1
2
3
4
5
6
DD
pin be tied to the analog ground path or isolated
PIN DESCRIPTIONS
Analog Output Voltage (V
Supply Voltage (V
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
DD
SS
DD
2
C interface. The SDA
Analog Output Voltage
Ground Reference
Supply Voltage
I
I
Device Address Selection pin. This pin can be tied to V
driven by the digital logic levels. The logic state of this pin determines what the A0
bit of the I
2
2
, V
C Serial Data
C Serial Clock Input
SS
SS
pin to a ground
)
Table
OUT
DD
2
C address bits should be.
) must be
)
3-1.
DD
pin
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
‘1’), or can be actively driven by the digital logic levels,
such as the I
“Device Addressing” for more details of the address
bits.
Function
Serial Clock Pin (SCL)
Device Address Selection Pin (A0)
2
C Master Output. See Section 7.2
© 2007 Microchip Technology Inc.
SS
or V
2
SS
C Serial Interface Com-
(logic ‘0’), or V
DD
, or can be actively
2
DD
C Serial Interface
2
C interface. The
line to the SCL
DD
(logic