lf398 NXP Semiconductors, lf398 Datasheet - Page 6

• Manufacturer Part Number: lf398
• Description: Sample-and-hold Amplifiers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TYPICAL AC PERFORMANCE CHARACTERISTICS
2001 Aug 03
Sample-and-hold amplifier
–100
–10
100
–10
–5
5
0
10
1
(Input to Output, Small-Signal)
1k
0.1
C
h
Dynamic Sampling Error
C
0.01 F
Phase And Gain
INPUT SLEW RATE (V/ms)
h
10k
C
1
= 1000 pF
h
C
FREQUENCY (Hz)
h
330 pF
C
0.01 F
= 0.01 F
h
= 1000 pF
100k
10
C
h
= 0
100
1M
330 pF
C
1000 pF
h
= 0
10M
1000
Figure 6. Typical AC Performance Characteristics (cont.)
80
70
60
50
40
30
20
10
0
–130
–120
–110
–100
–90
–80
–70
–60
–50
10 0
10 –1
10 –2
10 –3
10 –4
160
140
120
100
80
60
40
20
100 pF
0
10
100
Feedthrough Rejection Ratio
Power Supply Rejection
NEGATIVE
MODE
T
V+ = V– = 15 V
V
100
j
OUT
T
= 25 C
C
j
C
1000 pF
C
= 25 C
h
h
Output Droop Rate
h
1k
= 0 C
= 1000 pF
= 0.1 F
FREQUENCY (Hz)
= 0.01 F
100
FREQUENCY (Hz)
(Hold Mode)
HOLD CAPACITOR
(Continued)
6
0.01 F
1k
10k
POSITIVE
MODE
V+ = V– = 15 V
T
V
V
j
IN
7.8
10k 100k
=25 C
T
= 10 Vp-p
100k
j
0.1 F
= 0
= 85 C
1M
1M
1 F
160
140
120
100
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
80
60
40
20
2
1
0
0
10
–50 –25
SAMPLE
MODE
‘Hold’ Sampling Time
V+ = V– = 15 V
SETTLING TIME
JUNCTION TEMPERATURE ( C)
100
‘HOLD’ MODE
0
FREQUENCY (Hz)
Output Noise
25
50
1k
75
LF398
100 125
10k
Product data
SL00088
100k
150