LT1397 LINER [Linear Technology], LT1397 Datasheet

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LT1397

Manufacturer Part Number
LT1397
Description
Single/Dual/Quad 400MHz Current Feedback Amplifier
Manufacturer
LINER [Linear Technology]
Datasheet

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FEATURES
APPLICATIO S
TYPICAL APPLICATIO
400MHz Bandwidth on 5V (A
350MHz Bandwidth on 5V (A
0.1dB Gain Flatness: 100MHz (A
High Slew Rate: 800V/ s
Wide Supply Range: 2V(4V) to 6V(12V)
80mA Output Current
Low Supply Current: 4.6mA/Amplifier
LT1395: SO-8 Package
LT1396: SO-8 and MSOP Packages
LT1397: SO-14 and SSOP-16 Packages
Cable Drivers
Video Amplifiers
MUX Amplifiers
High Speed Portable Equipment
IF Amplifiers
0.67pF
HIGH INPUT RESISTANCE DOES NOT LOAD CABLE
EVEN WHEN POWER IS OFF
1.02k
3.01k
R
G1
V
IN –
Unity-Gain Video Loop-Through Amplifier
U
12.1k
+
LT1396
1/2
255
R
F1
BNC INPUTS
0.67pF
V
V
U
= 1)
= 2, –1)
V
3.01k
63.4
R
= 1, 2 and –1)
G2
V
IN +
12.1k
+
LT1396
1/2
255
R
1% RESISTORS
FOR A GAIN OF G:
V
R
R
R
TRIM CMRR WITH R
F2
OUT
F1
G1
G2
= R
= (G + 3) R
=
= G (V
G + 3
R
F2
F2
IN +
1395/6/7 TA01
– V
Current Feedback Amplifier
F2
DESCRIPTIO
The LT
400MHz current feedback amplifiers with an 800V/ s slew
rate and the ability to drive up to 80mA of output current.
The LT1395/LT1396/LT1397 operate on all supplies from
a single 4V to 6V. At 5V, they draw 4.6mA of supply
current per amplifier.
The LT1395/LT1396/LT1397 are manufactured on Linear
Technology’s proprietary complementary bipolar process.
They have standard single/dual/quad pinouts and they are
optimized for use on supply voltages of 5V.
IN –
, LTC and LT are registered trademarks of Linear Technology Corporation.
Single/Dual/Quad 400MHz
G1
V
)
OUT
®
1395/LT1396/LT1397 are single/dual/quad
–20
–30
–40
–50
–60
–10
10
LT1395/LT1396/LT1397
0
100
U
COMMON MODE SIGNAL
NORMAL SIGNAL
Loop-Through Amplifier
1k
Frequency Response
10k 100k
FREQUENCY (Hz)
1M
10M 100M
1395/6/7 TA02
1G
1

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LT1397 Summary of contents

Page 1

... V The LT1395/LT1396/LT1397 operate on all supplies from a single 4V to 6V. At 5V, they draw 4.6mA of supply current per amplifier. The LT1395/LT1396/LT1397 are manufactured on Linear Technology’s proprietary complementary bipolar process. ...

Page 2

... OUT D OUT –IN D –IN A – – +IN D +IN A – + – – –IN C – OUT C OUT PACKAGE 16-LEAD PLASTIC SSOP T = 150 C, = 135 C/W JMAX JA ORDER PART NUMBER LT1397CGN GN PART MARKING 1397 ...

Page 3

... Large-Signal Voltage Gain V – R Transimpedance OUT IN I Maximum Output Current OUT I Supply Current per Amplifier S SR Slew Rate (Note 7) – 3dB BW –3dB Bandwidth 0.1dB BW 0.1dB Bandwidth LT1395/LT1396/LT1397 CONDITIONS f = 1kHz 1k 1kHz f = 1kHz ...

Page 4

... Note 4: The LT1395C/LT1396C/LT1397C are guaranteed functional over the operating temperature range of – Note 5: The LT1395C/LT1396C/LT1397C are guaranteed to meet specified performance from The LT1395C/LT1396C/LT1397C are designed, characterized and expected to meet specified performance from – and 85 C but is not tested or QA sampled at these temperatures. ...

Page 5

... FREQUENCY (Hz) Output Impedance vs Frequency 100 255 0.1 0.01 10k 100k 1M 10M FREQUENCY (Hz) LT1395/LT1396/LT1397 Large-Signal Transient Response (A = – TIME (10ns/DIV 2. 280 100 L PSRR vs Frequency PSRR – PSRR 50 40 ...

Page 6

... LT1395/LT1396/LT1397 W U TYPICAL PERFOR A Capacitive Load vs Output Series Resistor 255 OVERSHOOT < 100 1000 CAPACITIVE LOAD (pF) 1397 G14 Positive Supply Current per Amplifier vs Temperature 5. 4.95 4.90 4.85 4.80 4.75 4.70 4.65 4.60 4.55 4.50 – 100 125 –50 25 AMBIENT TEMPERATURE ( C) 1397 G17 Square Wave Response ...

Page 7

... OUT D (Pin 16): D Channel Output resistor, the closed-loop gain and the load resistor. The LT1395/LT1396/LT1397 have been optimized for 5V supply operation and have a – 3dB bandwidth of 400MHz at a gain of 1 and 350MHz at a gain of 2. Please refer to the resistor selection guide in the Typical AC Performance table ...

Page 8

... R8. R8 connects to the inverting input of a second LT1397 amplifier (A2), which also sums the weighted G and B inputs to create a –0.5 • Y output. LT1397 amplifier A3 then takes the –0.5 • Y output and amplifies gain of –2, resulting in the Y output. Amplifier A1 is configured in a noninvert- ing gain of 2 with the bottom of the gain resistor R2 tied to the Y output ...

Page 9

... R4 255 Y = 0.3R + 0.59G + 0.11B substitute for Y at the output then get: – 255 A4 B (1.02R – 1.02R (0.37B – 0.37B) 1/4 LT1397 OUT 1395/6/7 F01 + = 2G The back-termination resistor R11 then halves the output of A2 resulting in the G output. Y R-Y signal B-Y ALL RESISTORS 1% ...

Page 10

... LT1395/LT1396/LT1397 PLIFIED SCHE ATIC +IN PACKAGE DESCRIPTIO 0.007 – 0.0098 (0.178 – 0.249) 0.016 – 0.050 (0.406 – 1.270) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" ...

Page 11

... BSC S Package 14-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.004 – 0.010 (0.101 – 0.254) 0.228 – 0.244 (5.791 – 6.197) 0.050 (1.270) BSC LT1395/LT1396/LT1397 0.118 0.004* (3.00 0.102 0.118 0.004** 0.193 0.006 (3.00 0.102) (4.90 0.15) MSOP (MS8) 1098 0.189 – ...

Page 12

... LT1395/LT1396/LT1397 O U TYPICAL A PPLICATI Single Supply RGB Video Amplifier The LT1395 can be used with a single supply voltage more to drive ground-referenced RGB video. In Figure 3, two 1N4148 diodes D1 and D2 have been placed in series with the output of the LT1395 amplifier A1 but within the feedback loop formed by resistor R8. These diodes effectively level-shift A1’ ...

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