LTC1290BISW#PBF Linear Technology, LTC1290BISW#PBF Datasheet - Page 12
LTC1290BISW#PBF
Manufacturer Part Number
LTC1290BISW#PBF
Description
IC DATA ACQ SYS 12BIT 20-SOIC
Manufacturer
Linear Technology
Type
Data Acquisition System (DAS), ADCr
Datasheet
1.LTC1290CCSWPBF.pdf
(32 pages)
Specifications of LTC1290BISW#PBF
Resolution (bits)
12 b
Sampling Rate (per Second)
50k
Data Interface
Serial, Parallel
Voltage Supply Source
Dual ±
Voltage - Supply
±5V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
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LTC1290
Unipolar/Bipolar (UNI)
The fifth input bit (UNI) determines whether the conver-
sion will be unipolar or bipolar. When UNI is a logical one,
a unipolar conversion will be performed on the selected
12
A
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0
PPLICATI
OUTPUT CODE
Unipolar Output Code (UNI = 1)
•
•
•
O
INPUT VOLTAGE
V
V
0 1 1 1 1 1 1 1 1 1 1 1
0 1 1 1 1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0
REF
REF
U
1LSB
OUTPUT CODE
0V
– 1LSB
– 2LSB
S
•
•
•
•
•
•
I FOR ATIO
U
INPUT VOLTAGE
(V
4.9988V
4.9976V
0.0012V
REF
0V
INPUT VOLTAGE
•
•
•
= 5V)
V
V
LTC1290 • AI04a
W
REF
REF
1LSB
0V
– 1LSB
– 2LSB
•
•
•
0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1 1 1 1 1
0 1 1 1 1 1 1 1 1 1 1 0
Bipolar Transfer Curve (UNI = 0)
Bipolar Output Code (UNI = 0)
INPUT VOLTAGE
U
(V
•
•
•
4.9976V
4.9851V
0.0024V
REF
0V
•
•
•
= 5V)
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 0
1 0 0 0 0 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0 0 0 0 0
•
•
•
1 1 1 1 1 1 1 1 1 1 1 1
input voltage. When UNI is a logical zero, a bipolar conver-
sion will result. The input span and code assignment for
each conversion type are shown in the figures below.
1 1 1 1 1 1 1 1 1 1 1 0
1 0 0 0 0 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0 0 0 0 0
OUTPUT CODE
Unipolar Transfer Curve (UNI = 1)
•
•
•
•
•
•
INPUT VOLTAGE
–(V
REF
– (V
–2LSB
–1LSB
) + 1LSB
•
•
•
REF
)
INPUT VOLTAGE
(V
–0.0024V
–0.0048V
–4.9976V
–5.0000V
REF
•
•
•
= 5V)
LTC1290 AI05a
LTC1290 AI05b
V
IN
LTC1290 AI04b
1290fe
V
IN