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ADS7842E Datasheet(PDF) 11 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
No. de pieza ADS7842E
Descripción Electrónicos  12-Bit, 4-Channel Parallel Output Sampling ANALOG-TO-DIGITAL CONVERTER
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Fabricante Electrónico  BURR-BROWN [Burr-Brown (TI)]
Página de inicio  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

ADS7842E Datasheet(HTML) 11 Page - Burr-Brown (TI)

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®
11
ADS7842
FIGURE 2. Normal Operation, 16 Clocks per Conversion.
CS
RD
WR
BUSY
A0
A1
COMMENTS
0
X
11X
Power Down Mode
0
X
10X
Wake Up Mode
means rising edge triggered. X = Don't care.
TABLE III. Truth Table for Power Down and Wake Up
Modes.
FIGURE 3. Initiating a Conversion.
12
3
CS
WR
BUSY
RD
A0
A1
CLK
Latching in Address for Next Channel
Conversion
45
67
8
9
10
1112
13
14
1516
Sample
DATA VALID
DB0-DB11
DIGITAL OUTPUT
STRAIGHT BINARY
DESCRIPTION
ANALOG INPUT
BINARY CODE
HEX CODE
Least Significant Bit (LSB)
1.2207mV
Full Scale
4.99878V
1111 1111 1111
FFF
Midscale
2.5V
1000 0000 0000
800
Midscale –1LSB
2.49878V
0111 1111 1111
7FF
Zero Full Scale
0V
0000 0000 0000
000
Table IV. Ideal Input Voltages and Output Codes (VREF = 5V).
CS
WR
CLK
BUSY
A0, A1
t
1
t
5
t
2
t
10
t
9
t
3
t
4
t
6
t
8
t
7
N + 1(1)
NOTE: (1) Addresses for next conversion (N + 1) latched in with rising edge of current WR (N).
t
CKL


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