MCP4726A1T-E/MAY Microchip Technology, MCP4726A1T-E/MAY Datasheet - Page 63

• Manufacturer Part Number: MCP4726A1T-E/MAY
• Description: Single, 12-bit NV DAC With Ext Vref And I2C Interface 6 DFN 2x2x0.9mm T/R
• Manufacturer: Microchip Technology
• Series: -r

Specifications of MCP4726A1T-E/MAY

• Settling Time: 6µs
• Number Of Bits: 12
• Data Interface: EEPROM, I²C, Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 1.10W
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 6-VDFN Exposed Pad
• Number Of Outputs And Type: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

8.0
The MCP47X6 family of devices are general purpose,
single channel voltage output DACs for various
applications
low-power and nonvolatile EEPROM memory is
needed.
Since the devices include a nonvolatile EEPROM
memory, the user can utilize these devices for
applications that require the output to return to the
previous set-up value on subsequent power-ups.
Applications generally suited for the devices are:
• Set Point or Offset Trimming
• Sensor Calibration
• Portable Instrumentation (Battery Powered)
• Motor Control
8.1
The SCL and SDA pins of the MCP47X6 devices are
open-drain configurations. These pins require a pull-up
resistor as shown in
The pull-up resistor values (R1 and R2) for SCL and
SDA pins depend on the operating speed (standard,
fast, and high speed) and loading capacitance of the
I
consumes less power, but increases the signal
transition time (higher RC time constant) on the bus
line. Therefore, it can limit the bus operating speed.
The lower resistor value, on the other hand, consumes
higher power, but allows higher operating speed. If the
bus line has higher capacitance due to long metal
traces or multiple device connections to the bus line, a
smaller pull-up resistor is needed to compensate the
long RC time constant. The pull-up resistor is typically
chosen between 1 kΩ and 10 kΩ ranges for standard
and fast modes, and less than 1 kΩ for high speed
mode.
© 2011 Microchip Technology Inc.
2
C bus line. A higher value of the pull-up resistor
TYPICAL APPLICATIONS
Connecting to I
Pull-Up Resistors
where
Figure
a
precision
8-2.
2
C BUS using
operation
with
8.1.1
The user can test the presence of the device on the I
bus line using a simple I
achieved by checking an acknowledge response from
the device after sending a read or write command.
Figure 8-1
The steps are:
a)
b)
c)
FIGURE 8-1:
MCP4706/4716/4726
SDA
SCL
Set the R/W bit “High” in the device’s address
byte.
Check the ACK bit of the address byte.
If the device acknowledges (ACK = 0) the
command, then the device is connected,
otherwise it is not connected.
Send Stop bit.
Start
Bit
shows an example with a read command.
DEVICE CONNECTION TEST
1
1
Device Code
2
1 0
3
I
2
Address Byte
2
C Bus Connection Test.
C command. This test can be
4
1 A2 A1 A0 1
Address bits
5
6
7
DS22272A-page 63
8
R/W
9
Device
Response
Stop
Bit
2
C