Datasheet

TLC251, TLC251A, TLC251B, TLC251Y
LinCMOS PROGRAMMABLE
LOW-POWER OPERATIONAL AMPLIFIERS
SLOS001F – JULY 1983 – REVISED MARCH 2001
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
operating characteristics, V
DD
= 5 V, T
A
= 25°C
TLC251Y
PARAMETER TEST CONDITIONS
HIGH-BIAS
MODE
MEDIUM-BIAS
MODE
LOW-BIAS
MODE
UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX
SR
Slew rate at
R
L
†
,
V
I(PP)
= 1 V 3.6 0.43 0.03
V/µs
SR
unity gain
L
,
C
L
= 20 pF
V
I(PP)
= 2.5 V 2.9 0.40 0.03
V/
µ
s
V
n
Equivalent input
noise voltage
f = 1 kHz, R
S
= 20 Ω 25 32 68 nV/√Hz
B
OM
Maximum output
swing bandwidth
V
O
= V
OH
,
R
L
= 10 kΩ
C
L
= 20 pF,
320 55 4.5 kHz
B
1
Unity-gain
bandwidth
V
I
= 10 mV, C
L
= 20 pF 1700 525 65 kHz
φ
m
Phase margin
f = B
1
,
C
L
= 20 pF
V
I
= 10 mV,
46° 40° 34°
†
For high-bias mode, R
L
= 10 kΩ; for medium-bias mode, R
L
= 100 kΩ; and for low-bias mode, R
L
= 1 MΩ.
PARAMETER MEASUREMENT INFORMATION
Figure 1. Unity-Gain Amplifier
–
+
Output
Input
C
L
= 100 pF
R
L
BIAS R
L
Low 1 MΩ
Medium 100 kΩ
High 10 kΩ
Figure 2. Input Offset Voltage Null Circuit
–
+
25 kΩ
N1
N2
IN–
IN+
Output
GND
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
I
DD
Su
pp
ly current
vs Bias-select voltage
vs Su
pp
ly voltage
3
4
I
DD
Supply
current
vs
S
upp
l
y vo
lt
age
vs Free-air temperature
4
5
Low bias vs Frequency 6
A
VD
Large-signal differential voltage amplification
Medium bias vs Frequency 7
High bias vs Frequency 8
Low bias vs Frequency 6
Phase shift
Medium bias
vs Frequency 7
High bias vs Frequency 8