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AD4348 Fiches technique(PDF) 7 Page - Analog Devices

No de pièce AD4348
Description  2.5 V to 5.5 V, Parallel Interface Octal Voltage Output 8-/10-/12-Bit DACs
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD4348 Fiches technique(HTML) 7 Page - Analog Devices

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AD5346/AD5347/AD5348
Rev. 0 | Page 7 of 24
AD5346 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
TOP VIEW
(Not to Scale)
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
AD5346
LDAC
A1
A0
WR
CS
AGND
VOUTD
VREFCD
VREFEF
VREFGH
VOUTC
VOUTB
VOUTA
VREFAB
PD
VDD
DB0
DB1
DB2
CLR
GAIN
DB7
DB6
DB3
DB4
DB5
8-BIT
VOUTH
VOUTG
VOUTF
VOUTE
DGND
A2
RD
BUF
DGND
DGND
DGND
DGND
Figure 5. AD5346 Pin Configuration—TSSOP
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
40
39
38
37
36
35
34
33
32
31
CS
AGND
VOUTD
VOUTC
VOUTB
VOUTA
DB0
DB1
DB2
DB7
DB6
DB3
DB4
DB5
VOUTH
VOUTG
VOUTF
VOUTE
RD
AGND
TOP VIEW
(Not to Scale)
AD5346
8-BIT
Figure 6. AD5346 Pin Configuration—LFCSP
Table 5. AD5346 Pin Function Descriptions
Pin Number
TSSOP
LFCSP
Mnemonic
Function
1
35
VREFGH
Reference Input for DACs G and H.
2
36
VREFEF
Reference Input for DACs E and F.
3
37
VREFCD
Reference Input for DACs C and D.
4
38, 39
VDD
Power Supply Pin(s). This part can operate from 2.5 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. Both VDD pins on the LFCSP
package must be at the same potential.
5
40
VREFAB
Reference Input for DACs A and B.
6–9,
11–14
1–4,
7–10
VOUTX
Output of DAC X. Buffered output with rail-to-rail operation.
10
5, 6
AGND
Analog Ground. Ground reference for analog circuitry.
15,
21–24
11,
17–20
DGND
Digital Ground. Ground reference for digital circuitry.
16
12
BUF
Buffer Control Pin. Controls whether the reference input to the DAC is buffered or unbuffered.
17
13
LDAC
Active Low Control Input. Updates the DAC registers with the contents of the input registers, which
allows all DAC outputs to be simultaneously updated.
18
14
A0
LSB Address Pin. Selects which DAC is to be written to.
19
15
A1
Address Pin. Selects which DAC is to be written to.
20
16
A2
MSB Address Pin. Selects which DAC is to be written to.
25–32
21–28
DB0–DB7
Eight Parallel Data Inputs. DB7 is the MSB of these eight bits.
33
29
CS
Active Low Chip Select Input. Used in conjunction with WR to write data to the parallel interface, or
with RD to read back data from a DAC.
34
30
RD
Active Low Read Input. Used in conjunction with CS to read data back from the internal DACs.
35
31
WR
Active Low Write Input. Used in conjunction with CS to write data to the parallel interface.
36
32
GAIN
Gain Control Pin. Controls whether the output range from the DAC is 0 V to VREF or 0 V to 2 × VREF.
37
33
CLR
Asynchronous Active Low Control Input. Clears all input registers and DAC registers to zeros.
38
34
PD
Power-Down Pin. This active low control pin puts all DACs into power-down mode.


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