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AD5627R Datenblatt(PDF) 9 Page - Analog Devices

Teilenummer AD5627R
Bauteilbeschribung  Dual, 12-/14-/16-Bit nanoDACs짰 with 5 ppm/째C On-Chip Reference, I2C짰 Interface
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Direct Link  http://www.analog.com
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AD5627R/AD5647R/AD5667R, AD5627/AD5667
Rev. 0 | Page 9 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
VOUTA
10
VREFIN
2
VOUTB
9
VDD
3
GND
8
SDA
4
LDAC
7
SCL
5
CLR
6
ADDR
AD5627/
AD5667
TOP VIEW
(Not to Scale)
EXPOSED PAD TIED TO GND
ON LFCSP PACKAGE.
Figure 4. AD5627/AD5667 Pin Configuration
1
VOUTA
10
VREFIN/VREFOUT
2
VOUTB
9
VDD
3
GND
8
SDA
4
LDAC
7
SCL
5
CLR
6
ADDR
AD5627R/
AD5647R/
AD5667R
TOP VIEW
(Not to Scale)
EXPOSED PAD TIED TO GND
ON LFCSP PACKAGE.
Figure 5. AD5627R/AD5647R/AD5667R Pin Configuration
Table 6. Pin Function Descriptions
Pin
No.
Mnemonic
Description
1
VOUTA
Analog Output Voltage from DAC A. The output amplifier has rail-to-rail operation.
2
VOUTB
Analog Output Voltage from DAC B. The output amplifier has rail-to-rail operation.
3
GND
Ground reference point for all circuitry on the part.
4
LDAC
Pulsing this pin low allows any or all DAC registers to be updated if the inputs have new data. This allows
simultaneous updates of all DAC outputs. Alternatively, this pin can be tied permanently low.
5
CLR
Asynchronous Clear Input. The CLR input is falling-edge sensitive. While CLR is low, all LDAC pulses are ignored.
When CLR is activated, zero scale is loaded to all input and DAC registers. This clears the output to 0 V. The part exits
clear code mode on the falling edge of the 9th clock pulse of the last byte of valid write. If CLR is activated during a
write sequence, the write is aborted. If CLR is activated during high speed mode the part will exit high speed mode.
6
ADDR
Three-State Address Input. Sets the two least significant bits (Bit A1, Bit A0) of the 7-bit slave address.
7
SCL
Serial Clock Line. This is used in conjunction with the SDA line to clock data into or out of the 24-bit input register.
8
SDA
Serial Data Line. This is used in conjunction with the SCL line to clock data into or out of the 24-bit input register. It is
a bidirectional, open-drain data line that should be pulled to the supply with an external pull-up resistor.
9
VDD
Power Supply Input. These parts can be operated from 2.7 V to 5.5 V, and the supply should be decoupled with a
10 μF capacitor in parallel with a 0.1 μF capacitor to GND.
10
VREFIN/VREFOUT
The AD56x7R have a common pin for reference input and reference output. When using the internal reference, this is
the reference output pin. When using an external reference, this is the reference input pin. The default for this pin is
as a reference input. (The internal reference and reference output are only available on R suffix versions.) The AD56x7
has a reference input pin only.


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