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LTC1276 Datasheet(PDF) 9 Page - Linear Technology

Part No. LTC1276
Description  12-Bit, 300ksps Sampling A/D Converters with Reference
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTC1276 Datasheet(HTML) 9 Page - Linear Technology

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9
LTC1273
LTC1275/LTC1276
127356fa
PI
FU C
S
TI
VSS (Pin 23): Negative Supply. – 5V for LTC1275/
LTC1276. Bypass to AGND with 0.1
µF ceramic.
NC (Pin 23): No Connection for LTC1273.
VDD (Pin 24): Positive Supply, 5V. Bypass to AGND
(10
µF tantalum in parallel with 0.1µF ceramic).
Table 1. Data Bus Output, CS and RD = LOW
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
Pin 11
Pin 13
Pin 14
Pin 15
Pin 16
MNEMONIC*
D11
D10
D9
D8
D7
D6
D5
D4
D3/11
D2/10
D1/9
D0/8
HBEN = LOW
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
HBEN = HIGH
DB11
DB10
DB9
DB8
LOW
LOW
LOW
LOW
DB11
DB10
DB9
DB8
*D11...D0/8 are the ADC data output pins.
DB11...DB0 are the 12-bit conversion results, DB11 is the MSB.
FU TIO AL BLOCK DIAGRA
CSAMPLE
CONTROL
LOGIC
INTERNAL
CLOCK
SUCCESSIVE
APPROXIMATION
REGISTER
12
12
OUTPUT
LATCHES
D11
D0/8
BUSY
2.42V
REFERENCE
VREF(OUT)
DGND
AGND
AIN
SAMPLE
HOLD
SAMPLE
VSS (NC ON LTC1273)
VDD
HBEN
CS
RD
LTC1273/75/76 • FBD
12-BIT
CAPACITIVE
DAC
COMPARATOR
TEST CIRCUITS
Load Circuits for Access Time
Load Circuits for Output Float Delay
3k
CL
DBN
DGND
A) HIGH-Z TO VOH (t3)
AND VOL TO VOH (t6)
CL
DBN
3k
5V
B) HIGH-Z TO VOL (t3)
AND VOH TO VOL (t6)
DGND
1273/75/76 • TA07
3k
10pF
DBN
DGND
A) VOH TO HIGH-Z
10pF
DBN
3k
5V
B) VOL TO HIGH-Z
DGND
1273/75/76 • TA08


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