Datasheet

LTC1099
4
AMBIENT TEMPERATURE, T
A
(°C)
–50
CONVERSION TIME/CONVERSION TIME AT 25°C
CONVERSION TIME (µs)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
4.5
4.0
3.5
3.0
2.5
2.0
1.5
25 75
1099 G07
–25 0
50 100 125
INPUT FREQUENCY (kHz)
1
SIGNAL-TO-NOISE RATIO, SNR (dB)
–36
–38
–40
–42
–44
–46
–48
–50
–52
10 100
1099 G08
T
A
= 25°C
T
C
= 2.5µs
Conversion Time vs Temperature
Signal-to-Noise Ratio (SNR) vs
Input Frequency
TYPICAL PERFOR A CE CHARACTERISTICS
UW
AMBIENT TEMPERATURE, T
A
(°C)
20
18
16
14
12
10
8
6
4
2
0
SUPPLY CURRENT, I
CC
(mA)
1099 G01
–50 –25 0
25
50 75 100 125
REFERENCE VOLTAGE, V
REF
(V)
0
V
OS
ERROR (LSB)
2
4
5
4
3
2
1
0
1099 G02
13
T
A
= 25°C
T
C
= 2.5µs
V
OS
Error vs Reference Voltage
Linearity Error vs Reference
Voltage
Supply Current vs Temperature
REFERENCE VOLTAGE, V
REF
(V)
0
LINEARITY ERROR (LBS)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
4
1099 G03
1
2
3
5
T
A
= 25°C
T
C
= 2.5µs
1099 G04
REFERENCE VOLTAGE, V
REF
(V)
0
TOTAL ERROR (LSB)
2
4
5
4
3
2
1
0
13
T
A
= 25°C
T
C
= 2.5µs
RESISTANCE (kΩ)
10
CONVERSION TIME (µs)
100
10
1.0
0.1
100 1000
1099 G05
RESISTOR BETWEEN
PIN 19 AND V
CC
RESISTOR BETWEEN
PIN 19 AND GND
T
A
= 25°C
CONVERSION TIME (µs)
1.6
0
TOTAL UNADJUSTED ERROR (LBS)
0.2
0.6
0.8
1.0
1.8
2.0
2.1 2.5
1099 G06
0.4
1.7 1.9
2.2
2.3
2.4
T
A
= 25°C
Total Error vs Reference Voltage
Conversion Time vs R
EXT
Accuracy vs Conversion Time