Datasheet

  
 
 
SLOS154B− DECEMBER 1995 − REVISED JUNE 2005
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
†
Figure 31
V
DD
= 5 mV
T
A
= 25°C
See Figure 35
V
I
= 10 mV
0
C
L
− Capacitive Load − pF
37°
100
25°
20 40 60 80
27°
29°
31°
33°
35°
PHASE MARGIN
vs
CAPACITIVE LOAD
10 30 50 70 90
m − Phase Marginm
φ
Figure 32
75
1
VN − Equivalent Input Noise Voltage − nV/Hz
f − Frequency − Hz
200
1000
0
25
50
100
125
150
175
10 100
EQUIVALENT INPUT NOISE VOLTAGE
vs
FREQUENCY
V
n
nV/ Hz
T
A
= 25°C
R
S
= 20Ω
V
DD
= 5 V
See Figure 34
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
PARAMETER MEASUREMENT INFORMATION
single-supply versus split-supply test circuits
Because the TLC27L1 is optimized for single-supply operation, circuit configurations used for the various tests
often present some inconvenience since the input signal, in many cases, must be offset from ground. This
inconvenience can be avoided by testing the device with split supplies and the output load tied to the negative
rail. A comparison of single-supply versus split-supply test circuits is shown below. The use of either circuit gives
the same result.
+
V
DD
C
L
R
L
V
O
V
I
V
I
V
O
R
L
C
L
−
+
V
DD+
V
DD−
(a) SINGLE SUPPLY (b) SPLIT SUPPLY
−
Figure 33. Unity-Gain Amplifier