LT1994 Linear Technology, LT1994 Datasheet - Page 5

• Manufacturer Part Number: LT1994
• Description: Low Noise - Low Distortion Fully Differential Input/Output Amplifier/Driver
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
Note 7: Input Common Mode Range is tested using the Test Circuit of
Figure 1 (R
(V
mode Voltage Range limits listed in the Electrical Characteristics table,
and confi rming the output THD is better than –40dB. The voltage range for
the output common mode range (Pin 2) is tested using the Test Circuit of
Figure 1 (R
Pin 2 (with V
at V
in the Electrical Characteristics Table, and confi rming the THD is better
than –40dB.
Note 8: Input CMRR is defi ned as the ratio of the change in the input
common mode voltage at the pins IN
TYPICAL PERFOR A CE CHARACTERISTICS
INM
–250
–500
–750
OUTCM
500
250
72
71
70
69
68
67
66
= 0), and measuring the output distortion (THD) at the common
0
–50
–50
Differential Input Referred
Voltage Offset vs Temperature
Gain Bandwidth vs Temperature
V
V
V
FOUR TYPICAL UNITS
S
CM
OCM
with V
F
F
= 3V
= R
= R
INP
= 1.5V
–25
–25
= 1.5V
I
I
= V
) by applying a single ended 2V
) by applying a 0.5V peak, 1kHz signal to the V
OCM
V
S
INM
TEMPERATURE
TEMPERATURE
= 3V
0
0
biased 0.5V from the V
= 0) and measuring the output distortion (THD)
V
S
25
25
= ±5V
(°C)
(°C)
50
50
W
+
or IN
75
75
1994 G01
1994 G04
–
OCM
U
to the change in differential
100
100
P-P
pin range limits listed
, 1kHz signal to V
–2.5
7.5
5.0
2.5
0
–50
–1
–2
Common Mode Voltage Offset vs
Temperature
2
1
0
V
V
V
FOUR TYPICAL UNITS
S
CM
OCM
0.1
Frequency Response vs
Supply Voltage
R
= 3V
OCM
F
= 1.5V
–25
= 1.5V
= R
I
INP
= 499Ω
TEMPERATURE
0
FREQUENCY (MHz)
1
25
input referred voltage offset. Output CMRR is defi ned as the ratio of the
change in the voltage at the V
referred voltage offset.
Note 9: Differential Power Supply Rejection (PSRR) is defi ned as the ratio
of the change in supply voltage to the change in differential input referred
voltage offset. Common Mode Power Supply Rejection (PSRRCM) is
defi ned as the ratio of the change in supply voltage to the change in the
common mode offset, V
Note 10: Output swings are measured as differences between the output
and the respective power supply rail.
Note 11: Extended operation with the output shorted may cause junction
temperatures to exceed the 150°C limit for the MSOP package (or 125°C
for the DD package) and is not recommended.
V
S
(°C)
V
= 5V
50
S
= 3V
10
V
S
75
= ±5V
V
S
1994 G02
= 2.5V
1994 G05
100
100
–10
–15
–20
–25
–30
OUTCM
–50
Input Bias Current and Input
Offset Current vs Temperature
I
OCM
OS
–1
–2
– V
2
1
0
, V
I
B
0.1
–25
Frequency Response vs
Load Capacitance
S
, V
pin to the change in differential input
R
OCM
= 3V
F
S
= R
= 3V
.
5pF FROM EACH
OUTPUT TO GROUND
25pF FROM EACH
OUTPUT TO GROUND
TEMPERATURE
I
0
= 499Ω
www.DataSheet4U.com
FREQUENCY (MHz)
1
25
I
(°C)
B
50
, V
V
I
S
OS
S
LT1994
= 2.5V
= ±5V
, V
10
S
75
= ±5V
V
1994 G03
S
= 3V
100
1994 G06
1.0
0.5
0
–0.5
–1.0
1994fa
5
100