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參數資料
型號: AD7945AN-B
廠商: ANALOG DEVICES INC
元件分類: DAC
英文描述: +3.3 V/+5 V Multiplying 12-Bit DACs
中文描述: PARALLEL, WORD INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDIP20
封裝: PLASTIC, DIP-20
文件頁數: 9/16頁
文件大小: 329K
代理商: AD7945AN-B
AD7943/AD7945/AD7948
REV. B
–9–
AD7943 PIN FUNCTION DESCRIPTIONS
Pin Mnemonic
Description
I
OUT1
I
OUT2
AGND
DAC current output terminal 1.
DAC current output terminal 2. This should be connected to the AGND pin.
This pin connects to the back gates of the current steering switches. In normal operation, it should be connected
to the signal ground of the system. In biased single-supply operation it may be biased to some voltage between
0 V and the 1.23 V. See Figure 11 for more details.
This is the Strobe 1 input. Data is clocked into the input shift register on the rising edge of this signal.
STB3
must be high. STB2, STB4 must be low.
Active low inputs. When both of these are low, the DAC register is updated and the output will change to
reflect this.
Serial Data Input. Data on this line will be clocked into the input shift register on one of the Strobe inputs,
when they are enabled.
This is the Strobe 2 input. Data is clocked into the input shift register on the rising edge of this signal.
STB3
must be high. STB1, STB4 must be low.
This is the Strobe 3 input. Data is clocked into the input shift register on the falling edge of this signal. STB1,
STB2, STB4, must be low.
This is the Strobe 4 input. Data is clocked into the input shift register on the rising edge of this signal.
STB3
must be high. STB1, STB2 must be low.
Digital Ground.
Asynchronous CLR input. When this input is taken low, all 0s are loaded to the DAC latch.
Power supply input. This is nominally +5 V for Normal Mode Operation and +3.3 V to +5 V for Biased
Mode Operation.
DAC reference input.
DAC feedback resistor pin.
STB1
LD1
,
LD2
SRI
STB2
STB3
STB4
DGND
CLR
V
DD
V
REF
R
FB
AD7945 PIN FUNCTION DESCRIPTIONS
Pin Mnemonic
Description
I
OUT1
AGND
DAC current output terminal 1.
This pin connects to the back gates of the current steering switches. The DAC I
OUT2
terminal is also connected
internally to this point.
Digital Ground.
Digital Data Inputs.
Active Low, Chip Select Input.
Active Low, Write Input.
Power supply input. This is nominally +5 V for Normal Mode Operation and +3.3 V to +5 V for Biased Mode
Operation.
DAC reference input.
DAC feedback resistor pin.
DGND
DB11–DB0
CS
WR
V
DD
V
REF
R
FB
相關PDF資料
PDF描述
AD7948AN-B +3.3 V/+5 V Multiplying 12-Bit DACs
AD7948 +3.3 V/+5 V Multiplying 12-Bit DACs
AD7948BN +3.3 V/+5 V Multiplying 12-Bit DACs
AD7948BR +3.3 V/+5 V Multiplying 12-Bit DACs
AD7948BRS +3.3 V/+5 V Multiplying 12-Bit DACs
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