Datasheet
8
LTC1090
1090fc
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Change in Offset Error
vs Temperature
Change in Linearity Error
vs Temperature
Change in Gain Error
vs Temperature
Maximum Conversion Clock Rate
vs Temperature
Maximum Conversion Clock Rate
vs Reference Voltage
Maximum Conversion Clock Rate
vs Supply Voltage
Maximum Conversion Clock Rate
vs Source Resistance
Maximum Filter Resistor vs Cycle
Time
Sample-and-Hold Acquisition
Time vs Source Resistance
*MAXIMUM ACLK FREQUENCY REPRESENTS THE ACLK FREQUENCY AT WHICH A 0.1LSB
SHIFT IN THE ERROR AT ANY CODE TRANSITION FROM ITS 2MHz VALVE IS FIRST DETECTED.
**MAXIMUM R
FILTER
REPRESENTS THE FILTER RESISTOR VALVE AT WHICH A 0.1LSB SHIFT
CHANGE IN FULL SCALE ERROR FROM ITS VALUE AT R
FILTER
= 0 IS FIRST DETECTED.
AMBIENT TEMPERATURE, T
A
(°C)
–50
MAGNITUDE OF OFFSET CHANGE, ∆OFFSET (LSBs)
0.4
0.5
0.6
25 75
LTC1090 • TPC10
0.3
0.2
–25 0
50 100 125
0.1
0
V
CC
= 5V
V
REF
= 5V
ACLK = 2MHz
AMBIENT TEMPERATURE, T
A
(°C)
–50
MAGNITUDE OF LINEARITY CHANGE, ∆LINEARITY (LSBs)
0.4
0.5
0.6
25 75
LTC1090 • TPC11
0.3
0.2
–25 0
50 100 125
0.1
0
V
CC
= 5V
V
REF
= 5V
ACLK = 2MHz
AMBIENT TEMPERATURE, T
A
(°C)
–50
MAGNITUDE OF GAIN CHANGE, ∆GAIN (LSBs)
0.4
0.5
0.6
25 75
LTC1090 • TPC12
0.3
0.2
–25 0
50 100 125
0.1
0
V
CC
= 5V
V
REF
= 5V
ACLK = 2MHz
AMBIENT TEMPERATURE, T
A
(°C)
–50
MAXIMUM ACLK FREQUENCY* (MHz)
4
5
6
25 75
LTC1090 • TPC13
3
2
–25 0
50 100 125
1
0
V
CC
= 5V
V
REF
= 5V
REFERENCE VOLTAGE, V
REF
(V)
0
MAXIMUM ACLK FREQUENCY* (MHz)
3
4
5
4
LTC1090 • TPC14
2
1
0
1
2
3
5
V
CC
= 5V
T
A
= 25°C
SUPPLY VOLTAGE, V
CC
(V)
4
7
6
5
4
3
2
1
0
79
LTC1090 • TPC15
56
810
MAXIMUM ACLK FREQUENCY* (MHz)
V
REF
= 4V
T
A
= 25°C
R
SOURCE
–
(Ω)
10
0
MAXIMUM ACLK FREQUENCY* (MHz)
3
4
5
100 1k 10k
LTC1090 • TPC16
2
1
+
INPUT
–
INPUT
V
IN
V
CC
= 5V
V
REF
= 5V
T
A
= 25°C
R
SOURCE
–
CYCLE TIME, t
CYC
(µs)
100
MAXIMUM R
FILTER
** (Ω)
1k
10k
100k
100 1000 10k
LTC1090 • TPC17
10
10
+
R
FILTER
C
FILTER
≥ 1µF
V
IN
_
R
SOURCE
+
(Ω)
100
0.1
S & H ACQUISITION TIME TO 0.1% (µs)
1
10
1k 10k
LTC1090 • TPC18
+
R
SOURCE
+
V
IN
_
V
REF
= 5V
V
CC
= 5V
T
A
= 25°C
0 TO 5V INPUT STEP