LT1229CN8 Linear Technology Corporation, LT1229CN8 Datasheet

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LT1229CN8

Manufacturer Part Number
LT1229CN8
Description
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURE
A
TYPICAL
HIGH INPUT RESISTANCE DOES NOT LOAD CABLE EVEN
WHEN POWER IS OFF
PPLICATI
100MHz Bandwidth
1000V/ s Slew Rate
Low Cost
30mA Output Drive Current
0.04% Differential Gain
0.1 Differential Phase
High Input Impedance: 25M , 3pF
Wide Supply Range: 2V to 15V
Low Supply Current: 6mA Per Amplifier
Inputs Common Mode to Within 1.5V of Supplies
Outputs Swing Within 0.8V of Supplies
Video Instrumentation Amplifiers
Cable Drivers
RGB Amplifiers
Test Equipment Amplifiers
3.01k
3.01k
R
G1
V
IN –
12.1k
S
A
+
LT1229
O
PPLICATI
1/2
750
R
Video Loop Through Amplifier
U
F1
S
BNC INPUTS
3.01k
187
R
O
G2
U
V
IN +
12.1k
+
LT1229
1/2
750
R
1% RESISTORS
WORST CASE CMRR = 22dB
TYPICALLY = 38dB
V
R
R
R
TRIM CMRR WITH R
F2
OUT
F1
G1
G2
= R
=
= (G – 1) R
= G (V
G – 1
F2
R
F2
IN +
– V
F2
IN –
LT1229 • TA01
G1
V
)
OUT
D
The LT1229/LT1230 dual and quad 100MHz current feed-
back amplifiers are designed for maximum performance
in small packages. Using industry standard pinouts, the
dual is available in the 8-pin miniDIP and the 8-pin SO
package while the quad is in the 14-pin DIP and 14-pin SO.
The amplifiers are designed to operate on almost any
available supply voltage from 4V ( 2V) to 30V ( 15V).
These current feedback amplifiers have very high input
impedance and make excellent buffer amplifiers. They
maintain their wide bandwidth for almost all closed-loop
voltage gains. The amplifiers drive over 30mA of output
current and are optimized to drive low impedance loads,
such as cables, with excellent linearity at high frequencies.
The LT1229/LT1230 are manufactured on Linear
Technology’s proprietary complementary bipolar process.
For a single amplifier like these see the LT1227 and for
better DC accuracy see the LT1223.
Current Feedback Amplifiers
ESCRIPTIO
Dual and Quad 100MHz
–20
–30
–40
–50
–60
–10
10
0
10
Loop Through Amplifier Frequency
COMMON-MODE SIGNAL
NORMAL SIGNAL
100
U
1k
FREQUENCY (Hz)
Response
10k
100k
LT1229/LT1230
1M
LT1229 • TA02
10M
100M
1

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LT1229CN8 Summary of contents

Page 1

FEATURE S 100MHz Bandwidth 1000V/ s Slew Rate Low Cost 30mA Output Drive Current 0.04% Differential Gain 0.1 Differential Phase High Input Impedance: 25M , 3pF Wide Supply Range 15V Low Supply Current: 6mA Per Amplifier Inputs Common ...

Page 2

... Junction Temperature Plastic Package .............................................. 150 C Ceramic Package ............................................ 175 C Lead Temperature (Soldering, 10 sec.)................. 300 ORDER PART OUT A 1 NUMBER – LT1229MJ8 + LT1229CJ8 + V 4 LT1229CN8 + LT1229CS8 – OUT PART MARKING J PACKAGE 14-LEAD CERAMIC DIP 1229 S PACKAGE 14-LEAD PLASTIC SOIC T = 175 C, J MAX T = 150 C, ...

Page 3

ELECTRICAL C HARA TERISTICS C Each Amplifier 0V 15V, pulse tested unless otherwise noted SYMBOL PARAMETER Inverting Input Current Common-Mode Rejection PSRR Power Supply Rejection Ratio Noninverting Input Current Power Supply Rejection Inverting ...

Page 4

LT1229/LT1230 W U TYPICAL PERFOR A Voltage Gain and Phase vs Frequency, Gain = 6dB 8 PHASE 7 6 GAIN ±15V 100 L – 750 F –2 ...

Page 5

W U TYPICAL PERFOR A Maximum Capacitance Load vs Feedback Resistor 10000 V = ±5V S 1000 V = ±15V S 100 PEAKING 5dB GAIN = FEEDBACK RESISTOR (k ...

Page 6

LT1229/LT1230 W U TYPICAL PERFOR A Settling Time to 10mV vs Output Step 10 NONINVERTING INVERTING ±15V –2 –4 –6 –8 NONINVERTING INVERTING –10 0 ...

Page 7

PPLICATI S I FOR ATIO The LT1229/LT1230 are very fast dual and quad current feedback amplifiers. Because they are current feedback amplifiers, they maintain their wide bandwidth over a wide range of voltage gains. These amplifiers ...

Page 8

LT1229/LT1230 PPLICATI S I FOR ATIO A Capacitive Loads The LT1229/LT1230 can drive capacitive loads directly when the proper value of feedback resistor is used. The graph Maximum Capacitive Load vs Feedback Resistor should be used to ...

Page 9

... Maximum Supply Voltage for 75 Cable Driving Applications at Maximum Ambient Temperature PART PACKAGE MAX POWER AT T LT1229MJ8 Ceramic DIP 0.500W @ 125 C LT1229CJ8 Ceramic DIP 1.050W @ 70 C LT1229CN8 Plastic DIP 0.800W @ 70 C LT1229CS8 Plastic SO8 0.533W @ 70 C LT1230MJ Ceramic DIP 0.625W @ 125 C LT1230CJ Ceramic DIP 1 ...

Page 10

LT1229/LT1230 PPLICATI FOR ATIO Crosstalk and Cascaded Amplifiers The amplifiers in the LT1229/LT1230 do not share any common circuitry. The only thing the amplifiers share is the supplies result, the crosstalk between ...

Page 11

... TYP 0.406 – 1.270 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. S ...

Page 12

... MAX 0.260 ± 0.010 (6.604 ± 0.254 0.337 – 0.344 (8.560 – 8.738 LT/GP 1092 5K REV A LINEAR TECHNOLOGY CORPORATION 1992 0.220 – 0.310 (5.588 – 7.874) J14 0392 8 7 N14 0392 0.150 – 0.157 (3.810 – 3.988) SO14 0392 ...

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