AD5339

Manufacturer Part NumberAD5339
Description2.5 V to 5.5 V, 250 µA, 2-Wire Interface, Dual Voltage Output,12-Bit DACs
ManufacturerAnalog Devices
AD5339 datasheet
 


Specifications of AD5339

Resolution (bits)12bitDac Update Rate14.8kSPS
Dac Settling Time8µsMax Pos Supply (v)+5.5V
Single-supplyYesDac TypeVoltage Out
Dac Input FormatI2C/Ser 2-wire  
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Default Readback Condition
All pointer byte bits power up to 0. Therefore, if the user
initiates a readback without writing to the pointer byte first, no
single DAC channel has been specified. In this case, the default
readback bits are all 0s, except for the CLR bit, which is 1.
Multiple DAC Write Sequence
Because there are individual bits in the pointer byte for each
DAC, it is possible to write the same data and control bits to two
DACs simultaneously by setting the relevant bits to 1.
MOST SIGNIFICANT DATA BYTE
8-BIT AD5337
MSB
PD1
PD0
CLR
LDAC
MSB
10-BIT AD5338
PD1
PD0
LDAC
CLR
MSB
12-BIT AD5339
PD1
PD0
CLR LDAC
SCL
0
0
0
1
1
SDA
START
CONDITION
ADDRESS BYTE
BY
MASTER
SCL
MSB
SDA
MOST SIGNIFICANT DATA BYTE
Multiple DAC Read Back Sequence
If the user attempts to read back data from more than one DAC
at a time, the part reads back the default, power-on reset
conditions, that is, all 0s except for CLR , which is 1.
WRITE OPERATION
When writing to the AD5337/AD5338/AD5339 DACs, the user
must begin with an address byte (R/ W = 0), after which the
DAC acknowledges that it is prepared to receive data by pulling
SDA low. This address byte is followed by the pointer byte,
which is also acknowledged by the DAC. Two bytes of data are
then written to the DAC, as shown in Figure 33. A stop
condition follows.
LEAST SIGNIFICANT DATA BYTE
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
LSB
MSB
D9
D8
D7
D6
D5
D4
D3
LSB
MSB
D11
D10
D9
D8
D7
D6
D5
Figure 32. Data Formats for Write and Read Back
0
A0
R/W
X
X
ACK
MSB
BY
AD533x
LSB
MSB
ACK
BY
LEAST SIGNIFICANT DATA BYTE
AD533x
Figure 33. Write Sequence
Rev. C | Page 17 of 28
AD5337/AD5338/AD5339
8-BIT AD5337
LSB
D0
X
X
X
X
10-BIT AD5338
LSB
D2
D1
D0
X
X
12-BIT AD5339
LSB
D4
D3
D2
D1
D0
LSB
ACK
BY
AD533x
POINTER BYTE
LSB
ACK
BY
AD533x
STOP
CONDITION
BY
MASTER