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| 型號： | AD7658BSTZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC |
| 中文描述： | 6-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP64 |
| 封裝： | ROHS COMPLIANT, MS-026BCD, LQFP-64 |
| 文件頁數(shù)： | 11/25頁 |
| 文件大小： | 308K |
| 代理商： | AD7658BSTZ-REEL |
Preliminary Technical Data
AD7658/AD7657/AD7656
PIN FUNCTIONAL DESCRIPTIONS
Rev. PrI | Page 11 of 25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
1
1
2
2
2
2
2
2
2
2
2
2
3
3
3
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
6
6
6
6
6
5
5
5
5
5
5
5
5
5
5
4
PIN 1
IDENTIFIER
DB7/HBEN/DCEN
DB6/SCLK
DB5/DCIN A
DB4/DCIN B
DB3/DCIN C
DB2/SEL C
DB1/SEL B
VDRIVE
DB13
DB12
DB11
DB10/SDATA C
DB9/SDATA B
DB8/SDATA A
DGND
DB14/REFBUF
EN/DIS
R
D
R
W
V
V
A
D
B
C
R
C
C
C
S
D
V3
AGND
AGND
V2
AVCC
AVCC
V1
AVCC
AVCC
AVCC
V5
AGND
AGND
V4
AVCC
V6
A
A
A
R
A
A
R
H
S
A
A
R
A
D
W
E
R
Table 6. AD7658/AD7657/AD7656 Pin Function Descriptions
Pin Mnemonic
Description
REFCAPA, REFCAPB,
REFCAPC
ADC pair. Each REFCAP pin should be decoupled to AGND using 10 μF and 100 nF capacitors.
V1 – V6
Analog Input1-6. These are six single-ended Analog inputs. The Analog input range on these
channels is ddetermined by the RANGE pin.
AGND
Analog Ground. Ground reference point for all analog circuitry on the
AD7658/AD7657/AD7656. All analog input signals and any external reference signal should be
referred to this AGND voltage. All eleven of these AGND pins should be connected to the
AGND plane of a system. The AGND and DGND voltages ideally should be at the same
potential and must not be more than 0.3 V apart, even on a transient basis.
DVCC
Digital Power. Normally at 5V. The DVCC and AVCC voltages should ideally be at the same
potential and must not be more than 0.3 V apart even on a transient basis. This supply should
be decoupled to DGND. 10 μF and 100 nF decoupling capacitors should be placed on the
DVCC pin.
VDRIVE
Logic power supply input. The voltage supplied at this pin determines at what voltage the
interface will operate. Nominally at the same supply as the supply of the host interface. This
pin should be decoupled to DGND. 10 μF and 100 nF decoupling capacitors should be placed
on the VDRIVE pin.
Decoupling capacitors are connected to these pins to decouple the reference buffer for each
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