参数资料
型号: AD5339BRM-REEL
厂商: ANALOG DEVICES INC
元件分类: DAC
英文描述: 2.5 V to 5.5 V, 250 UA, 2-Wire Interface Dual-Voltage Output, 8-/10-/12-Bit DACs
中文描述: SERIAL INPUT LOADING, 8 us SETTLING TIME, 12-BIT DAC, PDSO8
封装: MO-187AA, MSOP-8
文件页数: 18/24页
文件大小: 654K
代理商: AD5339BRM-REEL
AD5337/AD5338/AD5339
READ OPERATION
When reading data back from the AD5337/AD5338/AD5339
DACs, the user begins 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 usually followed by the
pointer byte, which is also acknowledged by the DAC. Then the
master initiates another start condition (repeated start) and the
address is resent with R/W = 1. This is acknowledged by the
DAC indicating that it is prepared to transmit data. Two bytes
of data are then read from the DAC as shown in Figure 34. A
stop condition follows. Note that in a read sequence, data bytes
are the same as those in the write sequence except that don’t
Rev. A | Page 18 of 24
cares are read back as 0. However, if the master sends an ACK
and continues clocking SCL (no stop is sent), the DAC
retransmits the same two bytes of data on SDA. This allows
continuous read back of data from the selected DAC register.
Alternatively, the user may send a start followed by the address
with R/W = 1. In this case, the previously loaded pointer
settings are used and read back of data can begin immediately.
0
DATA BYTE
LEAST SIGNIFICANT DATA BYTE
0
0
0
1
1
A0
R/W
X
X
LSB
ACK
BY
AD533x
SCL
SDA
START
CONDITION
BY
MASTER
ACK
BY
AD533x
MSB
SCL
SDA
0
0
0
1
1
0
A0
R/W
MSB
REPEATED
START
CONDITION
BY
MASTER
ACK
BY
AD533x
ADDRESS BYTE
SCL
SDA
MSB
LSB
NO
ACK
BY
MASTER
STOP
CONDITION
BY
MASTER
POINTER BYTE
ADDRESS BYTE
0
ACK
BY
MASTER
LSB
Figure 34. Read Sequence
相关PDF资料
PDF描述
AD5339BRM-REEL7 2.5 V to 5.5 V, 250 UA, 2-Wire Interface Dual-Voltage Output, 8-/10-/12-Bit DACs
AD534K Dual 14-bit 105MSPS ADC with serialized LVDS output 48-VQFN -40 to 85
AD534KD Dual 14-bit 125MSPS ADC with serialized LVDS output 48-VQFN -40 to 85
AD534KH Dual 14-bit 125MSPS ADC with serialized LVDS output 48-VQFN -40 to 85
AD534L Dual 14-bit 125MSPS ADC with serialized LVDS output 48-VQFN -40 to 85
相关代理商/技术参数
参数描述
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