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ADS7865IPBSRG4 Datasheet(PDF) 6 Page - Texas Instruments

No. de pieza ADS7865IPBSRG4
Descripción Electrónicos  Dual, 12-Bit, 33 or 22 Channel, Simultaneous Sampling Analog-to-Digital Converter
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7865IPBSRG4 Datasheet(HTML) 6 Page - Texas Instruments

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REF
IN
REF
OUT
AGND
AV
DD
DB11
DB10
DB9
DB8
BV
DD
BGND
WR
RD
CS
CLOCK
CONVST
BUSY
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
9
31
10
30
11
29
12
28
13
27
14
26
15
25
16
ADS7865
SBAS441C – OCTOBER 2008 – REVISED APRIL 2012
www.ti.com
DEVICE INFORMATION
PBS PACKAGE
TQFP-32
(TOP VIEW)
TERMINAL FUNCTIONS
PIN NUMBER
NAME
DESCRIPTION
1
REFIN
Reference voltage input. A ceramic capacitor of 470nF (min) is required at this terminal.
2
REFOUT
Reference voltage output. The programmable internal voltage reference output is available on this pin.
3
AGND
Analog ground. Connect to analog ground plane.
4
AVDD
Analog power supply, 2.7V to 5.5V. Decouple to AGND with a 1
μF ceramic capacitor.
5
DB11
Data bit 11, MSB
6
DB10
Data bit 10
7
DB9
Data bit 9
8
DB8
Data bit 8
9
DB7
Data bit 7
10
DB6
Data bit 6
11
DB5
Data bit 5
12
DB4
Data bit 4
13
DB3
Data bit 3
14
DB2
Data bit 2
15
DB1
Data bit 1
16
DB0
Data bit 0
ADC busy indicator. BUSY goes high when the inputs are in hold mode and returns to low after the
17
BUSY
conversion has been finished.
Conversion start. The ADC switches from the sample into the hold mode on the falling edge of
18
CONVST
CONVST, independent of the status of the CLOCK. The conversion itself starts with the next rising
edge of CLOCK.
19
CLOCK
External clock input.
Chip select. When low, the parallel interface of the device is active; when high, input signals are
20
CS
ignored and output signals are 3-state.
Read data. Falling edge active synchronization pulse for the parallel data outputs. RD only triggers,
21
RD
when CS is low.
22
WR
Write data. Rising edge latches in the parallel data inputs. WR only triggers, when CS is low.
6
Copyright © 2008–2012, Texas Instruments Incorporated


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