lt6600cs8-2.5-pbf Linear Technology Corporation, lt6600cs8-2.5-pbf Datasheet

no-image

lt6600cs8-2.5-pbf

Manufacturer Part Number
lt6600cs8-2.5-pbf
Description
Very Low Noise, Differential Amplifier And 15mhz Lowpass Filter
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
V
All other trademarks are the property of their respective owners.
IN
, LTC and LT are registered trademarks of Linear Technology Corporation.
Programmable Differential Gain via Two External
Resistors
Adjustable Output Common Mode Voltage
Operates and Specified with 3V, 5V, ±5V Supplies
0.5dB Ripple 4th Order Lowpass Filter with 15MHz
Cutoff
76dB S/N with 3V Supply and 2V
Low Distortion, 2V
Fully Differential Inputs and Outputs
Compatible with Popular Differential Amplifier
Pinouts
SO-8 Package
High Speed ADC Antialiasing and DAC Smoothing in
Networking or Cellular Base Station Applications
High Speed Test and Measurement Equipment
Medical Imaging
Drop-in Replacement for Differential Amplifiers
0.01µF
536Ω
1MHz: 86dBc 2nd, 90dBc 3rd
10MHz: 63dBc 2nd, 69dBc 3rd
R
IN
536Ω
R
IN
GAIN = 536Ω/R
1
7
2
8
LT6600-15
V
V
+
MID
OCM
3
6
3V
+
0.1µF
U
4
5
IN
P-P
, 800Ω Load, V
25Ω
25Ω
5.6pF
U
5.6pF
P-P
5.6pF
Output
A
S
+
IN
= 3V
V
CM
LTC2249
3V
V
+
2.2µF
D
V
Amplifier and 15MHz Lowpass Filter
OUT
660015 TA01a
DESCRIPTIO
The LT
with a 4th order 15MHz lowpass filter approximating a
Chebyshev frequency response. Most differential amplifi-
ers require many precision external components to tailor
gain and bandwidth. In contrast, with the LT6600-15, two
external resistors program differential gain, and the filter’s
15MHz cutoff frequency and passband ripple are internally
set. The LT6600-15 also provides the necessary level
shifting to set its output common mode voltage to accom-
modate the reference voltage requirements of A/Ds.
Using a proprietary internal architecture, the LT6600-15
integrates an antialiasing filter and a differential amplifier/
driver without compromising distortion or low noise
performance. At unity gain the measured in band
signal-to-noise ratio is an impressive 76dB. At higher
gains the input referred noise decreases so the part can
process smaller input differential signals without signifi-
cantly degrading the output signal-to-noise ratio.
The LT6600-15 also features low voltage operation. The
differential design provides outstanding performance for
a 2V
supply.
The LT6600-15 is packaged in an SO-8 and is pin compat-
ible with stand alone differential amplifiers.
P-P
Very Low Noise, Differential
®
signal level while the part operates with a single 3V
6600-15 combines a fully differential amplifier
–120
–100
–110
–30
–40
–50
–10
–20
–60
–70
–80
–90
0
0
U
An 8192 Point FFT Spectrum
10
FREQUENCY (MHz)
20
INPUT 10.7MHz
2V
f
SAMPLE
P-P
LT6600-15
30
= 80MHz
660015 TA01b
40
660015f
1

Related parts for lt6600cs8-2.5-pbf

lt6600cs8-2.5-pbf Summary of contents

Page 1

... Networking or Cellular Base Station Applications ■ High Speed Test and Measurement Equipment ■ Medical Imaging ■ Drop-in Replacement for Differential Amplifiers , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U TYPICAL APPLICATIO LT6600-15 3V 0.1µF ...

Page 2

... Distortion (Note PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER LT6600CS8-15 LT6600IS8-15 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifications are PARAMETER Differential Output Swing Input Bias Current Input Referred Differential Offset Differential Offset Drift Input Common Mode Voltage (Note 3) Output Common Mode Voltage (Note 5) Output Common Mode Offset (with ...

Page 4

LT6600- TYPICAL PERFOR A CE CHARACTERISTICS Amplitude Response 10 0 –10 –20 –30 – –50 GAIN = 25°C A –60 0 100 FREQUENCY (MHz) 66005 G01 Passband Gain and ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Distortion vs Signal Level –40 = ± 800Ω AT EACH OUTPUT L –50 GAIN = 25°C A –60 2ND HARMONIC, 10MHz INPUT –70 3RD –80 HARMONIC, ...

Page 6

LT6600- CTIO S – and IN (Pins 1, 8): Input Pins. Signals can be applied to either or both input pins through identical external resistors The DC gain from differential inputs ...

Page 7

U U APPLICATIO S I FOR ATIO Interfacing to the LT6600-15 The LT6600-15 requires two equal external resistors set the differential gain to 536Ω/R + filter are the voltages V and external components, Figure 1. ...

Page 8

LT6600- APPLICATIO S I FOR ATIO In Figure 3 the LT6600-15 is providing 12dB of gain. The gain resistor has an optional 62pF in parallel to improve the passband flatness near 15MHz. The common mode output voltage is ...

Page 9

U U APPLICATIO S I FOR ATIO 20 1dB COMPRESSION POINTS 0 85°C 3RD HARMONIC –20 85°C –40 3RD HARMONIC 25°C –60 2ND HARMONIC 85°C –80 2ND HARMONIC, 25°C –100 1MHz INPUT LEVEL (V ...

Page 10

LT6600- APPLICATIO S I FOR ATIO Noise The noise performance of the LT6600-15 can be evaluated with the circuit of Figure 7. Given the low noise output of the LT6600-15 and the 6dB attenuation of the transformer coupling ...

Page 11

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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. ...

Page 12

... Fixed Gain of 6dB, 12dB and 20dB Adjustable, Low Power, V 86dB S/N with 3V Supply, SO-8 82dB S/N with 3V Supply, SO-8 82dB S/N with 3V Supply, SO-8 76dB S/N with 3V Supply, SO-8 www.linear.com ● 3V 0.1µF INA LTC2299 INB 660015 TA02 = 2.375V to 12. 1105 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 660015f ...

Related keywords