lf398 NXP Semiconductors, lf398 Datasheet - Page 4

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

1. Unless otherwise specified, the following conditions apply. Unit is in “sample” mode, V
2. Hold step is sensitive to stray capacitive coupling between input logic signals and the hold capacitor. 1 pF, for instance, will create an
3. Leakage current is measured at a junction temperature of 25 C. The effects of junction temperature rise due to power dissipation or
4. The parameters are guaranteed over a supply voltage of 5 to 18 V.
Philips Semiconductors
DC ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following conditions apply: unit is in “sample” mode; V
C
NOTES:
2001 Aug 03
V
V
I
I
I
t
t
H
BIAS
BIAS
CC
AC
AC
SYMBOL
OS
OS
Sample-and-hold amplifier
C
additional 0.5 mV step with a 5 V logic swing and a 0.01 F hold capacitor. Magnitude of the hold step is inversely proportional to hold
capacitor value.
elevated ambient can be calculated by doubling the 25 C value for each 11 C increase in chip temperature. Leakage is guaranteed over
full input signal range.
= 0.01 F; and R
h
= 0.01 F, and R
Input offset voltage
In ut offset voltage
Input bias current
In ut bias current
Input impedance
Gain error
Gain error
Feedthrough attenuation ratio at 1 kHz
Output impedance
Out ut im edance
“HOLD” step
Supply current
Logic and logic reference input current
Leakage current into hold capacitor
Acquisition time to 0 1%
Acquisition time to 0.1%
Hold capacitor charging current
Supply voltage rejection ratio
Differential logic threshold
L
= 10 k . Logic reference voltage = 0 V and logic voltage = 2.5 V.
L
= 10 k . Logic reference voltage = 0 V and logic voltage = 2.5 V.
2
PARAMETER
4
4
4
4
T
j
= 25 C, C
T
V
T
T
Full temperature range
Full temperature range
Full temperature range
j
Full temperature range
j
OUT
j
T
TEST CONDITIONS
= 25 C, “HOLD” mode
= 25 C, “HOLD” mode
= 25 C, C
j
4
= 25 C, R
V
= 10 V, C
C
IN
V
h
T
T
T
T
T
T
h
–V
OUT
j
j
j
= 0.01 F, V
j
j
j
= 0.01 F
= 25 C
= 25 C
= 25 C
= 25 C
= 25 C
OUT
25 C
= 0 V
h
L
h
= 0.01 F
= 2 V
=10 k
= 1000 pF
S
= 15 V; T
S
OUT
= 15 V, T
= 0 V
j
= 25 C; –11.5 V3 V
j
= 25 C, –11.5 V
Min
0.8
80
80
0.004
10
Typ
110
0.5
1.0
4.5
1.4
10
90
30
20
2
2
4
5
10
IN
V
+11.5 V;
IN
Max
0.01
0.02
100
200
2.5
6.5
2.4
+11.5 V,
10
50
10
7
4
6
LF398
Product data
UNIT
mV
mV
mV
mA
mA
nA
nA
dB
pA
dB
%
%
V
A
s
s