
6
LTC1594L/LTC1598L
15948lfb
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Power Supply Feedthrough
vs Ripple Frequency
FREQUENCY (kHz)
0
– 120
MAGNITUDE
(dB)
– 100
–80
–60
–40
1.0
2.0
3.0
4.0
1594L/98L G13
–20
0
0.5
1.5
2.5
3.5
TA = 25°C
VCC = 2.7V
VREF = 2.5V
fIN = 3.05kHz
fCLK = 120kHz
fSMPL = 7.5kHz
4096 Point FFT Plot
RIPPLE FREQUENCY (Hz)
–80
FEEDTHROUGH
(dB)
–60
–40
–50
–20
0
–90
–70
–30
–10
1k
100k
1M
10M
1594L/98L G15
–100
10k
TA = 25°C
VCC = 2.7V (VRIPPLE = 1mV)
VREF = 2.5V
fCLK = 200kHz
Intermodulation Distortion
FREQUENCY (kHz)
0
– 120
MAGNITUDE
(dB)
– 100
–80
–60
–40
1.0
2.0
3.0
4.0
1594L/98L G14
–20
0
0.5
1.5
2.5
3.5
TA = 25°C
VCC = 2.7V
VREF = 2.5V
f1 = 2.05kHz
f2 = 3.05kHz
fSMPL = 7.5kHz
Maximum Clock Frequency
vs Source Resistance
SOURCE RESISTANCE (
)
10
CLOCK
FREQUENCY
(kHz)
120
130
150
170
100
1000
1594L/98L G16
200
140
160
180
190
–INPUT
+INPUT
VIN
RSOURCE
–
TA = 25°C
VCC = 2.7V
VREF = 2.5V
Sample-and-Hold Acquisition Time
vs Source Resistance
SOURCE RESISTANCE (
)
1
100
S
&
H
ACQUISITION
TIME
(ns)
1000
10000
100
1000
10
10000
1594L/98L G17
TA = 25°C
VCC = 2.7V
VREF = 2.5V
–INPUT
+INPUT
VIN
RSOURCE
+
Input Channel Leakage Current
vs Temperature
Minimum Clock Frequency for
0.1LSB Error vs Temperature
TEMPERATURE (
°C)
0
CLOCK
FREQUENCY
(kHz)
80
100
120
40
1594L/98L G18
60
40
0
10
20
30
60
70
50
20
2
VCC = 2.7V
VREF = 2.5V
TEMPERATURE (
°C)
–55
LEAKAGE
CURRENT
(nA)
10
100
1000
105
1594L/98L G19
1
0.1
0.01
–15
25
65
–35
125
5
45
85
VCC = 2.7V
VREF = 2.5V
ON CHANNEL
OFF CHANNEL