LTC1272-8CCSW#PBF Linear Technology, LTC1272-8CCSW#PBF Datasheet - Page 19
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LTC1272-8CCSW#PBF
Manufacturer Part Number
LTC1272-8CCSW#PBF
Description
IC A/D CONV 12BIT SAMPLNG 24SOIC
Manufacturer
Linear Technology
Datasheet
1.LTC1272-3CCSW.pdf
(20 pages)
Specifications of LTC1272-8CCSW#PBF
Number Of Bits
12
Sampling Rate (per Second)
250k
Data Interface
Parallel
Number Of Converters
1
Power Dissipation (max)
75mW
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (0.300", 7.50mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
A
PPLICATI
OUTPUT
2.42V
V
REF
*
O
U
+
ANALOG INPUT
S
10µF
**
*
✝
(0V TO 5V)
I FOR ATIO
THE LTC1272 HAS THE SAME 0V TO 5V INPUT RANGE BUT PROVIDES A 2.42V
REFERENCE OUTPUT AS OPPOSED TO THE –5.25V OF THE AD7572. FOR PROPER
OPERATION, REVERSE THE REFERENCE CAPACITOR POLARITY AND SHORT OUT THE
10 RESISTOR.
THE D FLIP-FLOP SYNCHRONIZES THE CONVERSION START SIGNAL (RD ) TO THE
ADC CLK
AN ASYNCHRONOUS CLOCK.
THE LTC1272 CAN ACCOMMODATE THE –15V SUPPLY OF THE AD7572 BUT DOES
NOT REQUIRE IT. PIN 23 OF THE LTC1272 IS NOT INTERNALLY CONNECTED.
U
Ω
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
DATA
0.1µF
BUS
µ
OUT
P
Figure 23. Plugging the LTC1272 into an AD7572 Socket
Case 2: Clock Not Synchronous with CS and RD
10Ω
SIGNAL TO PREVENT OUTPUT CODE NOISE WHICH OCCURS WITH
W
*
AGND
D11 (MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
A
V
REF
IN
LTC1272
U
CLK OUT
CLK IN
D2/10
BUSY
HBEN
D3/11
D0/8
D1/9
NC
V
RD
CS
DD
✝
ASYNCHRONOUS
EXTERNAL
CLOCK
Q
0.1 F
µ
74HC74
1/2
S
CLK
+
OR
D**
10 F
–15V
µ
†
74HC04
0.1 F
µ
RD
LTC1272 • TA05
+
10 F
5V
µ
CONTROL
LINES
µ
P
LTC1272
19
1272fb