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LT1398 Datasheet(PDF) 5 Page - Linear Technology

Part No. LT1398
Description  Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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5
LT1398/LT1399/LT1399HV
The q denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C.
For each amplifier: VCM = 0V, VS = ±7.5V, EN = 0V, pulse tested, unless otherwise noted. (Note 4)
ELECTRICAL C
C
HARA TERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SR
Slew Rate (Note 6)
AV = 10, RL = 150Ω, VS = ±5V
500
800
V/
µs
tON
Turn-On Delay Time (Note 7)
RF = RG = 324Ω, RL = 100Ω, VS = ±5V
30
75
ns
tOFF
Turn-Off Delay Time (Note 7)
RF = RG = 324Ω, RL = 100Ω, VS = ±5V
40
100
ns
tr, tf
Small-Signal Rise and Fall Time
RF = RG = 324Ω, RL = 100Ω, VOUT = 1VP-P,
1.3
ns
VS = ±5V
tPD
Propagation Delay
RF = RG = 324Ω, RL = 100Ω, VOUT = 1VP-P,
2.5
ns
VS = ±5V
os
Small-Signal Overshoot
RF = RG = 324Ω, RL = 100Ω, VOUT = 1VP-P,10
%
VS = ±5V
tS
Settling Time
0.1%, AV = – 1V, RF = RG = 309Ω, RL = 150Ω,25
ns
VS = ±5V
dG
Differential Gain (Note 8)
RF = RG = 324Ω, RL = 150Ω, VS = ±5V
0.13
%
dP
Differential Phase (Note 8)
RF = RG = 324Ω, RL = 150Ω, VS = ±5V
0.10
DEG
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
Note 3: A heat sink may be required depending on the power supply
voltage and how many amplifiers have their outputs short circuited.
Note 4: The LT1398/LT1399/LT1399HV are guaranteed to meet specified
performance from 0
°C to 70°C and are designed, characterized and
expected to meet these extended temperature limits, but are not tested at
–40
°C and 85°C. Guaranteed I grade parts are available, consult factory.
Note 5: TJ is calculated from the ambient temperature TA and the
power dissipation PD according to the following formula:
LT1398CS, LT1399CS, LT1399HVCS: TJ = TA + (PD • 100°C/W)
LT1399CGN: TJ = TA + (PD • 120°C/W)
Note 6: Slew rate is measured at
±2V on a ±3V output signal.
Note 7: Turn-on delay time (tON) is measured from control input to
appearance of 1V at the output, for VIN = 1V. Likewise, turn-off delay
time (tOFF) is measured from control input to appearance of 0.5V on
the output for VIN = 0.5V. This specification is guaranteed by design
and characterization.
Note 8: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1
°.
Ten identical amplifier stages were cascaded giving an effective
resolution of 0.01% and 0.01
°.
SMALL SIGNAL
SMALL SIGNAL
SMALL SIGNAL
VS (V)
AV
RL (Ω)RF (Ω)RG (Ω)
– 3dB BW (MHz)
0.1dB BW (MHz)
PEAKING (dB)
±5
1
100
365
300
150
0.05
±5
2
100
324
324
300
150
0
±5
– 1
100
309
309
300
150
0
TYPICAL AC PERFOR A CE
(LT1399HV)




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