Datasheet

6
LTC1594/LTC1598
15948fb
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Intermodulation Distortion
FREQUENCY (kHz)
0
–60
–40
0
35
1594/98 G15
–80
–100
12
467
–120
–140
–20
MAGNITUDE (dB)
T
A
= 25°C
V
CC
= V
REF
= 5V
f
1
= 5kHz
f
2
= 6kHz
f
SMPL
= 12.5kHz
Attenuation vs Input Frequency
4096 Point FFT Plot
FREQUENCY (kHz)
0
–60
–40
0
35
1594/98 G14
–80
–100
12
467
–120
–140
–20
MAGNITUDE (dB)
T
A
= 25°C
V
CC
= V
REF
= 5V
f
IN
= 5kHz
f
CLK
= 320kHz
f
SMPL
= 12.5kHz
Power Supply Feedthrough
vs Ripple Frequency
Maximum Clock Frequency
vs Source Resistance
INPUT FREQUENCY (kHz)
110
100
ATTENUATION (%)
80
90
60
70
40
50
20
30
100 1000 10000
1594/98 G13
0
10
T
A
= 25°C
V
CC
= V
REF
= 5V
f
SMPL
= 16.8kHz
RIPPLE FREQUENCY (kHz)
FEEDTHROUGH (dB)
–50
0
1 100 1000 10000
1594/98 G16
–100
10
T
A
= 25°C
V
CC
= 5V (V
RIPPLE
= 20mV)
V
REF
= 5V
f
CLK
= 320kHz
SOURCE RESISTANCE (kΩ)
0.1
0
CLOCK FREQUENCY (kHz)
60
120
180
240
360
110
1594/98 G17
300
+INPUT
COM
R
SOURCE
–
V
IN
T
A
= 25°C
V
CC
= V
REF
= 5V
Sample-and-Hold Acquisition Time
vs Source Resistance
SOURCE RESISTANCE (Ω)
10 100 1000
1594/98 G18
10.1 10000
100
S & H ACQUISITION TIME (ns)
1000
10000
T
A
= 25°C
V
CC
= V
REF
= 5V
+INPUT
COM
R
SOURCE
+
V
IN
Input Channel Leakage Current
vs Temperature
TEMPERATURE (°C)
–60
LEAKAGE CURRENT (nA)
1000
100
10
1
0.1
0.01
100
1594/98 G20
–20
20
60
140
–40
0
40 80
120
V
CC
= 5V
V
REF
= 5V
ON CHANNEL
OFF CHANNEL
Minimum Clock Frequency for
0.1LSB Error vs Temperature
TEMPERATURE (°C)
–55
CLOCK FREQUENCY (kHz)
160
240
25 45 65 85
1594/98 G19
80
0
–35
–15
5
320
V
CC
= V
REF
= 5V