LTC1296DCSW Linear Technology, LTC1296DCSW Datasheet - Page 25

• Manufacturer Part Number: LTC1296DCSW
• Description: IC DATA ACQ SYSTEM 12BIT 20-SOIC
• Manufacturer: Linear Technology
• Type: Data Acquisition System (DAS), ADCr

Specifications of LTC1296DCSW

• Resolution (bits): 12 b
• Sampling Rate (per Second): 46.5k
• Data Interface: Serial, Parallel
• Voltage Supply Source: Dual ±
• Voltage - Supply: ±5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LTC1296DCS

TYPICAL
A
A “Quick Look” Circuit for the LTC1294/6
Users can get a quick look at the function and timing of the
LTC1294/6 by using the following simple circuit (Figure
23). V
should be applied to the CH7 with respect to COM. A
22µF
PPLICATI
V
IN
REF
+15V
is tied to V
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
A
LT1027
PPLICATI
O
LTC1294
Figure 23. “Quick Look” Circuit for the LTC1294/6
Rplat. = 1kΩ AT 0°C – ROSEMOUNT #118MF
12k*
U
1k*
CC
** 1% FILM RESISTOR
S
. D
* TRW-IRC MAR-6 RESISTOR – 0.1%
AGND
DV
D
AV
REF +
REF
CLK
OUT
D
CS
V
CC
CC
IN
IN
5V
I FOR ATIO
–
–
U
12.5k*
OUT
is tied high which means V
O
OSCILLOSCOPE
+
Rplat.
U
10µF
TO
Digitally Linearized Platinum RTD Signal Conditioner
W
S
500k
400°C TRIM
+
–
LT1101
A=10
A1
+15V
f
U
CLOCK IN
1MHz MAX
f/64
IN
+
–
LT1006
+15V
A2
ZERO°C TRIM
1µF
Unipolar conversion is requested and the data is output
MSB first. CS is driven at 1/64 the clock rate by the CD4520
and D
pin can be viewed on an oscilloscope that is set up to
trigger on the falling edge of CS (Figure 24).
3.92M**
CLK
EN
Q1
Q2
Q3
Q4
RESET
V
30.1k**
SS
500k
CD4520
OUT
LTC1293/LTC1294/LTC1296
outputs the data. The output data from the D
RESET
1k
V
CLK
Q4
Q3
Q2
Q1
EN
DD
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
+5V
LTC1293 F23
LTC1294
D
CLK
OUT
AGND
CS
DV
D
REF +
AV
REF
CLK
OUT
D
CS
V
CC
CC
IN
Figure 24. Scope Trace of the
LTC1294/6 “Quick Look” Circuit
Showing A/D Output
101010101010 (AAA
–
–
NULL
BIT
VERTICAL: 5V/DIV
HORIZONTAL: 2µs/DIV
(B11)
MSB
TO/FROM
68HC11
PROCESSOR
LTC1293 TA03
LSB
(B0)
22µF
TANTALUM
HEX
FILLS
ZEROES
)
25
129346fs
OUT