Datasheet
5
LTC1594L/LTC1598L
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TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Change in Linearity
vs Reference Voltage
Change in Gain
vs Reference Voltage
Change in Offset
vs Reference Voltage
REFERENCE VOLTAGE (V)
0.5
0
CHANGE IN OFFSET (LSB = 1/4096 × V
REF
)
0.5
1.0
1.5
2.0
2.5
3.0
1.0 1.5 2.0 2.5
1594L/98L G04
3.0
T
A
= 25°C
V
CC
= 2.7V
f
CLK
= 200kHz
f
SMPL
= 10.5kHz
REFERENCE VOLTAGE (V)
1.0
0
CHANGE IN LINEARITY (LSB)
0.05
0.15
0.20
0.25
0.50
0.35
1.4
1.8
2.0 2.8
1594L/98L G06
0.10
0.40
0.45
0.30
1.2 1.6
2.2
2.4
2.6
T
A
= 25°C
V
CC
= 2.7V
f
CLK
= 200kHz
f
SMPL
= 10.5kHz
REFERENCE VOLTAGE (V)
1.0
0
CHANGE IN GAIN (LSB)
–1
–3
–4
–5
–10
–7
1.4
1.8
2.0 2.8
1594L/98L G07
–2
–8
–9
–6
1.2 1.6
2.2
2.4
2.6
T
A
= 25°C
V
CC
= 2.7V
f
CLK
= 200kHz
f
SMPL
= 10.5kHz
INPUT FREQUENCY (kHz)
1
0
EFFECTIVE NUMBER OF BITS (ENOBs)
S/(N + D) (dB)
3
5
7
10
10 100
1594L/98L G09
1
4
6
9
12
11
8
62
56
74
68
50
2
T
A
= 25°C
V
CC
= 2.7V
f
CLK
= 200kHz
f
SMPL
= 10.5kHz
Effective Bits and S/(N + D)
vs Input Frequency
Differential Nonlinearity vs Code
CODE
0
–1
DIFFERENTIAL NONLINEARITY ERROR (LSB)
–0.5
0
0.5
1
512 1024 1536 2048
1594L/98L G08
2560 3072 3584 4096
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
f
CLK
= 200kHz
Spurious Free Dynamic Range
vs Input Frequency
INPUT FREQUENCY (kHz)
1
0
SPURIOUS-FREE DYNAMIC RANGE (dB)
20
40
60
80
10 100
1594L/98L G10
100
10
30
50
70
90
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
f
SMPL
= f
SMPL(MAX)
Frequency Response
INPUT FREQUENCY (Hz)
80
ATTENUATION (%)
60
40
50
20
0
90
70
30
10
1k 100k 1M 10M
1594L/98L G12
100
10k
(MUX + A
DC
)
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
f
SMPL
= f
SMPL(MAX)
Change in Offset vs Temperature
TEMPERATURE (°C)
0
CHANGE IN OFFSET (LSB)
0.15
30
1594L/98L G05
0
–0.10
10 20 40
–0.15
–0.20
0.20
0.10
0.05
–0.05
50 60 70
V
CC
= 2.7V
V
REF
= 2.5V
f
CLK
= 200kHz
f
SMPL
= f
SMPL(MAX)
S/(N + D) vs Input Level
INPUT LEVEL (dB)
–45
SIGNAL-TO-NOISE PLUS DISTORTION (dB)
40
50
60
–5
1594L/98/ G11
30
20
0
–35
–25
–15
–40 0
–30
–20
–10
10
80
70
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
f
IN
= 1kHz
f
SMPL
= f
SMPL(MAX)