LTC1090_15 Datasheet, PDF (8/28 Pages) Linear Technology – Single Chip 10-Bit Data Acquisition System

LTC1090
TYPICAL PERFOR A CE CHARACTERISTICS
Change in Offset Error
vs Temperature
0.6
V_CC = 5V
0.5
V_REF = 5V
ACLK = 2MHz
0.4
Change in Linearity Error
vs Temperature
0.6
V_CC = 5V
0.5
V_REF = 5V
ACLK = 2MHz
0.4
Change in Gain Error
vs Temperature
0.6
V_CC = 5V
0.5
V_REF = 5V
ACLK = 2MHz
0.4
0.3
0.3
0.3
0.2
0.2
0.2
0.1
0.1
0.1
0
–50
–25 0 25 50 75 100 125
AMBIENT TEMPERATURE, T_A (°C)
LTC1090 • TPC10
Maximum Conversion Clock Rate
vs Temperature
6
5
4
3
2
1 _{VCC = 5V}
V_REF = 5V
0
–50 –25 0
25 50
75 100 125
AMBIENT TEMPERATURE, T_A (°C)
LTC1090 • TPC13
Maximum Conversion Clock Rate
vs Source Resistance
5
V_CC = 5V
V_REF = 5V
4
T_A = 25°C
3
V_IN
2
+INPUT
–INPUT
1
R_SOURCE–
0
–50
–25 0 25 50 75 100 125
AMBIENT TEMPERATURE, T_A (°C)
LTC1090 • TPC11
Maximum Conversion Clock Rate
vs Reference Voltage
5
V_CC = 5V
T_A = 25°C
4
3
2
1
0
0
1
2
3
4
5
REFERENCE VOLTAGE, V_REF (V)
LTC1090 • TPC14
Maximum Filter Resistor vs Cycle
Time
100k
R_FILTER
V_IN
+
10k ^{CFILTER ≥ 1µF}
_
1k
100
0
–50
–25 0 25 50 75 100 125
AMBIENT TEMPERATURE, T_A (°C)
LTC1090 • TPC12
Maximum Conversion Clock Rate
vs Supply Voltage
7
V_REF = 4V
6 ^TA ^{= 25°C}
5
4
3
2
1
0
45
6
7
8 9 10
SUPPLY VOLTAGE, V_CC (V)
LTC1090 • TPC15
Sample-and-Hold Acquisition
Time vs Source Resistance
10
V_REF = 5V
V_CC = 5V
T_A = 25°C
0 TO 5V INPUT STEP
1
R_SOURCE⁺
V_IN
+
_
0
10
100
1k
R_SOURCE– (Ω)
10k
LTC1090 • TPC16
10
10
100
1000
10k
CYCLE TIME, t_CYC (µs)
LTC1090 • TPC17
0.1
100
1k
R_SOURCE⁺ (Ω)
10k
LTC1090 • TPC18
*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
RFILTER
=
0
IS
FIRST
DETECTED.
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