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AD7951 Datasheet(PDF) 8 Page - Analog Devices

No. de pieza AD7951
Descripción Electrónicos  14-Bit, 1 MSPS, Unipolar/Bipolar Programmable Input PulSAR
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD7951 Datasheet(HTML) 8 Page - Analog Devices

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AD7951
Data Sheet
Rev. A | Page 8 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
AGND
AVDD
AGND
BYTESWAP
OB/2C
SER/PAR
NC
NC
D0/DIVSCLK[0]
D1/DIVSCLK[1]
IMPULSE
WARP
BIPOLAR
CNVST
PD
RESET
CS
RD
TEN
BUSY
D13/SCCS
D12/SCCLK
D11/SCIN
D10/HW/SW
48 47 46 45 44 43 42 41 40 39 38 37
35
34
33
30
31
32
36
29
28
27
25
26
2
3
4
7
6
5
1
8
9
10
12
11
13 14 15 16 17 18 19 20 21 22 23 24
PIN 1
AD7951
TOP VIEW
(Not to Scale)
NOTES
1. NC = NO CONNECT.
2. FOR THE LEAD FRAME CHIP SCALE PACKAGE (LFCSP), THE EXPOSED
PAD SHOULD BE CONNECTED TO VEE. THIS CONNECTION IS NOT
REQUIRED TO MEET THE ELECTRICAL PERFORMANCES.
Figure 4. Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
Mnemonic
Type1
Description
1, 3, 42
AGND
P
Analog Power Ground Pins. Ground reference point for all analog I/O. All analog I/O should be
referenced to AGND and should be connected to the analog ground plane of the system. In addition,
the AGND, DGND, and OGND voltages should be at the same potential.
2, 44
AVDD
P
Analog Power Pins. Nominally 4.75 V to 5.25 V and decoupled with 10 μF and 100 nF capacitors.
4
BYTESWAP
DI
Parallel Mode Selection (8-Bit/14-Bit). When high, the LSB is output on D[15:8] and the MSB is output
on D[7:0]; when low, the LSB is output on D[7:0] and the MSB is output on D[15:8].
5
OB/2C
DI2
Straight Binary/Binary Twos Complement Output. When 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
WARP
DI2
Conversion Mode Selection. Used in conjunction with the IMPULSE input per the following:
Conversion Mode
WARP
IMPULSE
Normal
Low
Low
Impulse
Low
High
Warp
High
Low
Normal
High
High
See the Modes of Operation section for a more detailed description.
7
IMPULSE
DI2
Conversion Mode Selection. See the WARP pin description in the previous row of this table. See the
Modes of Operation section for a more detailed description.
8
SER/PAR
DI
Serial/Parallel Selection Input.
When SER/PAR = low, the parallel mode is selected.
When SER/PAR = high, the serial modes are selected. Some bits of the data bus are used as a serial port
and the remaining data bits are high impedance outputs.
9, 10
NC
DO
No Connect. Do not connect.


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