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參數(shù)資料
| 型號(hào)： | EVAL-AD7643CBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 27/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR AD7643 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 18 |
| 采樣率（每秒）： | 1.25M |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 輸入范圍： | ±VREF |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 65mW @ 1.25MSPS |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7643 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | AD7643BCPZRL-ND - IC ADC 18BIT DIFF W/REF 48-LFCSP AD7643BCPZ-ND - IC ADC 18BIT DIFF W/REF 48LFCSP AD7643BSTZ-ND - IC ADC 18BIT DIFFER W/REF 48LQFP AD7643BSTZRL-ND - IC ADC 18BIT DIFFER W/REF 48LQFP |
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AD7643
Rev. 0 | Page 8 of 28
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
36
35
34
33
32
31
30
29
28
27
26
25
13 14 15 16 17 18 19 20 21 22 23 24
1
2
3
4
5
6
7
8
9
10
11
12
48 47 46 45 44
39 38 37
43 42 41 40
PIN 1
IDENTIFIER
TOP VIEW
(Not to Scale)
AGND
CNVST
PD
RESET
CS
RD
DGND
AGND
AVDD
MODE0
MODE1
D0/OB/2C
NC = NO CONNECT
D1/A0
D2/A1
D3
D4/DIVSCLK[0]
BUSY
D17
D16
D15
AD7643
D5/DIVSCLK[1]
D14
D
6/E
X
T
/IN
T
D7/
INV
S
Y
N
C
D
8/IN
V
S
C
L
K
D
9/R
D
C
/S
D
IN
OGN
D
OV
D
DV
DD
DG
ND
D10
/S
D
O
U
T
D1
1/
S
C
L
K
D12
/S
Y
NC
D
13/
RDE
RRO
R
P
DBUF
P
DRE
F
RE
F
BUF
IN
TE
M
P
AV
D
IN
+
AG
ND
AG
ND
NC
IN
–
RE
F
G
ND
RE
F
06
02
4-
0
04
DGND
Figure 4. Pin Configuration
Table 6. Pin Function Descriptions
Pin
No.
Mnemonic
Type1
Description
1, 36,
41, 42
AGND
P
Analog Power Ground Pin.
2, 44
AVDD
P
Input Analog Power Pins. Nominally 2.5 V.
3, 4
MODE[0:1]
DI
Data Output Interface Mode Selection.
Interface MODE#
MODE1
MODE0
Description
0
18-bit interface
1
0
1
16-bit interface
2
1
0
8-bit (byte) interface
3
1
Serial interface
5
D0/OB/2C
DI/O
When MODE[1:0] = 0 (18-bit interface mode), this pin is Bit 0 of the parallel port data output bus
and the data coding is straight binary. In all other modes, this pin allows the choice of straight
binary/twos complement. When OB/2C is high, the digital output is straight binary; when low,
the MSB is inverted resulting in a twos complement output from its internal shift register.
6, 7
DGND
P
Connect to Digital Ground.
8
D1/A0
DI/O
When MODE[1:0] = 0, this pin is Bit 1 of the parallel port data output bus. In all other modes, this
input pin controls the form in which data is output as shown in Table 7.
9
D2/A1
DI/O
When MODE[1:0] = 0, this pin is Bit 2 of the parallel port data output bus.
When MODE[1:0] = 1 or 2, this input pin controls the form in which data is output as shown in Table 7.
10
D3
DO
When MODE[1:0] = 0, 1, or 2, this output is used as Bit 3 of the parallel port data output bus.
This pin is always an output, regardless of the interface mode.
11, 12
D[4:5]
DI/O
When MODE[1:0] = 0, 1, or 2, these pins are Bit 4 and Bit 5 of the parallel port data output bus.
or DIVSCLK[0:1]
When MODE[1:0] = 3 (serial mode), serial clock division selection. When using serial master read
after convert mode (EXT/INT = low, RDC/SDIN = low), these inputs can be used to slow down the
internally generated serial clock that clocks the data output. In other serial modes, these pins are
high impedance outputs.
13
D6
DI/O
When MODE[1:0] = 0, 1, or 2, this output is used as Bit 6 of the parallel port data output bus.
or EXT/INT
When MODE[1:0] = 3 (serial mode), serial clock source select. This input is used to select the
internally generated (master) or external (slave) serial data clock.
When EXT/INT = low, master mode. The internal serial clock is selected on SCLK output.
When EXT/INT = high, slave mode. The output data is synchronized to an external clock signal,
gated by CS, connected to the SCLK input.
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