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AD5322 Scheda tecnica(PDF) 7 Page - Analog Devices

Il numero della parte AD5322
Spiegazioni elettronici  2.5 V to 5.5 V, 230uA, Parallel Interface Dual Voltage-Output 8-/10-/12-Bit DACs
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD5322 Scheda tecnica(HTML) 7 Page - Analog Devices

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REV. 0
AD5332/AD5333/AD5342/AD5343
–7–
AD5342 FUNCTIONAL BLOCK DIAGRAM
VOUTA
BUFFER
AD5342
VOUTB
BUFFER
POWER-ON
RESET
DAC
REGISTER
DAC
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INTER-
FACE
LOGIC
VDD
DB11
DB0
CS
WR
A0
CLR
LDAC
.
.
.
VREFA
POWER-DOWN
LOGIC
RESET
PD GND
VREFB
12-BIT
DAC
12-BIT
DAC
AD5342 PIN FUNCTION DESCRIPTIONS
Pin
No.
Mnemonic
Function
1
GAIN
Gain Control Pin. This controls whether the output range from the DAC is 0-VREF or 0-2 VREF.
2
BUF
Buffer Control Pin. This pin controls whether the reference input to the DAC is buffered or unbuffered.
3VREFB
Reference Input for DAC B.
4VREFA
Reference Input for DAC A.
5VOUTA
Output of DAC A. Buffered output with rail-to-rail operation.
6VOUTB
Output of DAC B. Buffered output with rail-to-rail operation.
7, 8
NC
No Connect.
9
GND
Ground reference point for all circuitry on the part.
10
CS
Active Low Chip Select Input. This is used in conjunction with WR to write data to the parallel interface.
11
WR
Active low Write Input. This is used in conjunction with CS to write data to the parallel interface.
12
A0
Address pin for selecting between DAC A and DAC B.
13
CLR
Asynchronous active low control input that clears all input registers and DAC registers to zeros.
14
LDAC
Active low control input that updates the DAC registers with the contents of the input registers. This
allows all DAC outputs to be simultaneously updated.
15
PD
Power-Down Pin. This active low control pin puts all DACs into power-down mode.
16
VDD
Power Supply Pin. These parts can operate from 2.5 V to 5.5 V and the supply should be decoupled with a
10 F capacitor in parallel with a 0.1 F capacitor to GND.
17–28
DB0–DB11
12 Parallel Data Inputs. DB11 is the MSB of these 12 bits.
AD5342 PIN CONFIGURATION
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AD5342
LDAC
A0
WR
CS
GND
BUF
VREFB
VREFA
VOUTB
VOUTA
GAIN
PD
VDD
DB0
DB1
DB2
DB3
DB4
DB9
DB8
DB5
DB6
DB7
12-BIT
NC
NC
CLR
DB10
DB11
NC = NO CONNECT


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