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ELECTRICAL CHARACTERISTICS (Continued)
TYPICAL CHARACTERISTICS
Table of Graphs
THS4120
THS4121
SLOS319D – FEBRUARY 2001 – REVISED OCTOBER 2004
V
DD
= 3.3 V, R
L
= 800 Ω , T
A
= 25 ° C (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT CHARACTERISTICS
CMRR Common-mode rejection ratio T
A
= full range 64 96 dB
0.35
0.65 to
V
ICR
Common-mode input voltage range T
A
= full range to V
V
DD
– 0.1
V
DD
r
i
Input resistance (dc level) Measured into each input terminal 820 M Ω
C
i
Input capacitance, closed loop 3 pF
r
o
Output resistance See Figure 16 1 Ω
OUTPUT CHARACTERISTICS
V
OH
High-level output Voltage V
IC
= V
DD
/2, V
DD
= 3.3 V, T
A
= 25 ° C 3.05 3.15 V
V
OL
Low-level output Voltage V
IC
= V
DD
/2, V
DD
= 3.3 V, T
A
= 25 ° C 0.25 0.15 V
I
O
Output current (sink), R
L
= 7 Ω V
DD
= 3.3 V, T
A
= 25 ° C 80 100 mA
I
O
Output current (source), R
L
= 7 Ω V
DD
= 3.3 V, T
A
= 25 ° C 20 25 mA
POWER SUPPLY
V
DD
Supply voltage range Single supply 3.3 V
T
A
= 25 ° C 11 13.5
I
DD
Quiescent current (per amplifier) V
DD
= 3.3 V mA
T
A
= full range 16
PSRR Power-supply rejection ratio T
A
= 25 ° C 68 85 dB
POWER-DOWN CHARACTERISTICS (THS4120 ONLY)
Enable >1.4
Power-down voltage level
(2)
V
Power down <1.2
T
A
= 25 ° C 120
Power-down quiescent current µ A
T
A
= full range 130
t
on
Turn-on time delay 4.8 µ s
50% of final supply current value
t
off
Turn-off time delay 3 ns
z
o
Output impedance f = 1 MHz 1 k Ω
(1) The full range temperature is 0 ° C to 70 ° C for the C suffix, and –40 ° C to 85 ° C for the I suffix.
(2) For detail information on the power-down circuit, see the power-down section in the application section of this data sheet.
FIGURE
Small-signal frequency response 1
SR Slew rate 2
vs Frequency 3
THD Total harmonic distortion
vs Output voltage 4
vs Frequency 5, 6, 7
Harmonic distortion
vs Output voltage 8, 9
Third intermodulation distortion vs Output voltage 10
V
O
Output voltage vs Load resistance 11
Settling time 12
V
n
Voltage noise vs Frequency 13
V
OO
Output offset voltage vs Common-mode input voltage 14
CMMR Common-mode rejection ratio vs Frequency 15
z
os
Single-ended output impedance (closed loop) vs Frequency 16
4
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