LTC1273 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LTC1273 Datasheet PDF : 24 Pages
| |||
LTC1273
LTC1275/LTC1276
PI FU CTI S
VSS (Pin 23): Negative Supply. – 5V for LTC1275/
LTC1276. Bypass to AGND with 0.1µF ceramic.
NC (Pin 23): No Connection for LTC1273.
VDD (Pin 24): Positive Supply, 5V. Bypass to AGND
(10µF 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.
UU
W
FU TIO AL BLOCK DIAGRA
CSAMPLE
SAMPLE
AIN
HOLD
SAMPLE
COMPARATOR
–
+
VDD VSS (NC ON LTC1273)
VREF(OUT)
2.42V
REFERENCE
12-BIT
CAPACITIVE
DAC
12 SUCCESSIVE
12
APPROXIMATION
REGISTER
AGND DGND
INTERNAL
CLOCK
CONTROL
LOGIC
D11
OUTPUT
LATCHES
•
•
•
D0/8
BUSY
CS
RD
HBEN
LTC1273/75/76 • FBD
TEST CIRCUITS
Load Circuits for Access Time
DBN
3k
CL
DGND
A) HIGH-Z TO VOH (t3)
AND VOL TO VOH (t6)
5V
3k
DBN
CL
DGND
B) HIGH-Z TO VOL (t3)
AND VOH TO VOL (t6)
1273/75/76 • TA07
Load Circuits for Output Float Delay
DBN
3k
10pF
5V
3k
DBN
10pF
DGND
A) VOH TO HIGH-Z
DGND
B) VOL TO HIGH-Z
1273/75/76 • TA08
127356fa
9
Share Link: 