Datasheet

5
LTC1594/LTC1598
15948fb
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
0
–0.05
–0.15
–0.20
–0.25
–0.30
–0.50
–0.35
–0.10
–0.40
–0.45
REFERENCE VOLTAGE (V)
1.0
CHANGE IN LINEARITY (LSB)
2.0 3.0
4.0
5.0
1594/98 G06
1.5 2.5
3.5
4.5
T
A
= 25°C
V
CC
= 5V
f
CLK
= 320kHz
f
SMPL
= 16.8kHz
Change in Linearity
vs Reference Voltage
TEMPERATURE (°C)
–55
–3.0
CHANGE IN OFFSET (LSB)
–2.5
–2.0
–1.5
–1.0
–15 25
65
1594/98 G05
–0.5
0
–35 5
45
85
V
CC
= V
REF
= 5V
f
CLK
= 320kHz
f
SMPL
= 16.8kHz
Change in Offset vs Temperature
Change in Gain
vs Reference Voltage
REFERENCE VOLTAGE (V)
1.0
0
CHANGE IN OFFSET (LSB = 1/4096 V
REF
)
0.5
1.0
1.5
2.0
2.0 3.0
4.0
5.0
1594/98 G04
2.5
3.0
1.5 2.5
3.5
4.5
T
A
= 25°C
V
CC
= 5V
f
CLK
= 320kHz
f
SMPL
= 16.8kHz
Change in Offset
vs Reference Voltage
0
–1
–3
–4
–5
–6
–10
–7
–2
–8
–9
REFERENCE VOLTAGE (V)
1.0
CHANGE IN GAIN (LSB)
2.0 3.0
4.0
5.0
1594/98 G07
1.5 2.5
3.5
4.5
T
A
= 25°C
V
CC
= 5V
f
CLK
= 320kHz
f
SMPL
= 16.8kHz
Peak-to-Peak ADC Noise
vs Reference Voltage
REFERENCE VOLTAGE (V)
1
ADC NOISE IN LBSs
1.0
1.5
5
1594/98 G08
0.5
0
2
3
4
2.0
T
A
= 25°C
V
CC
= 5V
f
CLK
= 320kHz
Differential Nonlinearity vs Code
Effective Bits and S/(N + D)
vs Input Frequency
S/(N + D) vs Input Level
INPUT FREQUENCY (kHz)
1
0
EFFECTIVE NUMBER OF BITS (ENOBs)
8
7
10
9
12
11
10 100 1000
1594/98 G10
6
50
44
62
56
74
68
38
5
4
3
2
1
T
A
= 25°C
V
CC
= 5V
f
CLK
= 320kHz
f
SMPL
= 16.8kHz
INPUT LEVEL (dB)
–40
0
SIGNAL-TO-NOISE PLUS DISTORTION (dB)
20
10
40
30
60
50
80
70
–30 –20
1594/98 G12
–10 0
T
A
= 25°C
V
CC
= V
REF
= 5V
f
IN
= 1kHz
f
SMPL
= 16.8kHz
Spurious Free Dynamic Range
vs Frequency
INPUT FREQUENCY (kHz)
1
40
SPURIOUS FREE DYNAMIC RANGE (dB)
50
60
70
80
10 100 1000
1594/98 G11
30
20
10
0
90
100
T
A
= 25°C
V
CC
= V
REF
= 5V
f
SMPL
= 16.8kHz
CODE
0
DIFFERENTIAL NONLINEARITY ERROR (LBS)
–1.0
–0.8
–0.6
–0.4
–0.2
0.4
0.6
0.8
1.0
0.2
0.0
2048
1594/98 G09
4096