ltc6400cud-26-trpbf Linear Technology Corporation, ltc6400cud-26-trpbf Datasheet

no-image

ltc6400cud-26-trpbf

Manufacturer Part Number
ltc6400cud-26-trpbf
Description
1.8ghz Low Noise, Low Distortion Differential Adc Driver For 300mhz If
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIONS
TYPICAL APPLICATION
0.1μF
INPUT
1.8GHz –3dB Bandwidth
Fixed Gain of 10V/V (20dB)
–94dBc IMD
–65dBc IMD
1nV/√Hz Internal Op Amp Noise
2.1nV/√Hz Total Input Noise
6.2dB Noise Figure
Differential Inputs and Outputs
200Ω Input Impedance
2.85V to 3.5V Supply Voltage
90mA Supply Current (270mW)
1V to 1.6V Output Common Mode Voltage,
Adjustable
DC- or AC-Coupled Operation
Max Differential Output Swing 4.4V
Small 16-Lead 3mm × 3mm × 0.75mm QFN Package
Differential ADC Driver
Differential Driver/Receiver
Single Ended to Differential Conversion
IF Sampling Receivers
SAW Filter Interfacing
66.5Ω
29Ω
1000pF
0.1μF
0.1μF
3
3
at 300MHz (Equivalent OIP3 = 36.5dBm)
at 70MHz (Equivalent OIP3 = 51dBm)
Single-Ended to Differential ADC Driver
+IN
–IN
ENABLE
V
+
LTC6400-20
V
OCM
V –
+OUT
–OUT
20dB GAIN
+OUTF
–OUTF
P-P
10Ω
10Ω
1.25V
AIN
AIN
3.3V
LTC2208 130Msps
+
LTC2208
16-Bit ADC
V
CM
640020 TA01a
V
DD
DESCRIPTION
The LTC
targeted at processing signals from DC to 300MHz. The
part has been specifi cally designed to drive 12-, 14- and
16-bit ADCs with low noise and low distortion, but can also
be used as a general-purpose broadband gain block.
The LTC6400-20 is easy to use, with minimal support
circuitry required. The output common mode voltage is
set using an external pin, independent of the inputs, which
eliminates the need for transformers or AC-coupling ca-
pacitors in many applications. The gain is internally fi xed
at 20dB (10V/V).
The LTC6400-20 saves space and power compared to
alternative solutions using IF gain blocks and transform-
ers. The LTC6400-20 is packaged in a compact 16-lead
3mm × 3mm QFN package and operates over the –40°C
to 85°C temperature range.
All other trademarks are the property of their respective owners.
Distortion Differential ADC
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
0.1μF
1.8GHz Low Noise, Low
®
6400-20 is a high-speed differential amplifi er
Driver for 300MHz IF
60
50
40
30
20
10
0
0
Equivalent Output IP3 vs
50
FREQUENCY (MHz)
100
Frequency
150
LTC6400-20
200
(NOTE 7)
250
640020 TA01b
300
640020f
1

Related parts for ltc6400cud-26-trpbf

ltc6400cud-26-trpbf Summary of contents

Page 1

... The LTC6400-20 is packaged in a compact 16-lead P-P 3mm × 3mm QFN package and operates over the –40°C to 85°C temperature range. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 3.3V 1.25V 0.1μ ...

Page 2

... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC6400CUD-20#PBF LTC6400CUD-20#TRPBF LTC6400IUD-20#PBF LTC6400IUD-20#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise noted. SYMBOL PARAMETER Input/Output Characteristic G Gain DIFF TC Gain Temperature Drift GAIN V Output Swing Low SWINGMIN V Output Swing High SWINGMAX V Maximum Differential Output Swing ...

Page 4

LTC6400-20 AC ELECTRICAL CHARACTERISTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0V unless otherwise noted. L SYMBOL PARAMETER –3dBBW –3dB Bandwidth 0.1dBBW Bandwidth for 0.1dB Flatness 0.5dBBW Bandwidth for 0.5dB Flatness 1/f ...

Page 5

AC ELECTRICAL CHARACTERISTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0V unless otherwise noted. L SYMBOL PARAMETER 140MHz Input Signal HD /HD Second/Third Order Harmonic 2,140M 3,140M Distortion IMD Third-Order Intermodulation 3,140M ...

Page 6

LTC6400-20 AC ELECTRICAL CHARACTERISTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0V unless otherwise noted. L SYMBOL PARAMETER 300MHz Input Signal HD /HD Second-Order Harmonic Distortion 2,300M 3,300M IMD Third-Order Intermodulation 3,300M ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Frequency Response 25 TEST CIRCUIT 100 1000 3000 FREQUENCY (MHz) 640020 G01 Input and Output Refl ection and Reverse Isolation vs Frequency 0 TEST CIRCUIT B –10 –20 S11 –30 ...

Page 8

LTC6400-20 TYPICAL PERFORMANCE CHARACTERISTICS Overdrive Recovery Time 2 87.5Ω PER OUTPUT L +OUT 2.0 1.5 1.0 0.5 –OUT 100 150 TIME (ns) 640020 G10 Harmonic Distortion (Filtered) vs Frequency –40 DIFFERENTIAL INPUT ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS Output 1dB Compression Point vs Frequency 20 DIFFERENTIAL INPUT R = 400Ω L (NOTE 100 150 FREQUENCY (MHz) Turn-On Time 3.5 3.0 2 2.0 1.5 1.0 0.5 0 ...

Page 10

LTC6400-20 PIN FUNCTIONS + V (Pins 1, 3, 10): Positive Power Supply (Normally tied 3.3V). All three pins must be tied to the same voltage. Bypass each pin with 1000pF and 0.1μF capaci- tors as close to ...

Page 11

APPLICATIONS INFORMATION Circuit Operation The LTC6400 is a low noise and low distortion fully dif- ferential op amp/ADC driver with: • Operation from DC to 1.8GHz (–3dB bandwidth) • Fixed gain of 10V/V (20dB) • Differential input impedance 200Ω • ...

Page 12

LTC6400-20 APPLICATIONS INFORMATION R S 0.1μF 50Ω 100Ω 1000Ω – IN+ OUT– 66.5Ω 14 +IN 0.1μF 15 –IN IN– OUT 0.1μF 50Ω 100Ω 1000Ω 16 – 66.5Ω Figure 3. ...

Page 13

APPLICATIONS INFORMATION 1.6V. The bandwidth of V control is typically 15MHz, OCM which is dominated by a low pass fi lter connected to the V pin and is aimed to reduce common mode noise OCM generation at the outputs. The ...

Page 14

... V CC C10 C9 C12 0.1μF 1000pF 1000pF R19 1.5k C7 0.1μF C23 C5 0.1μF 0.1μF R21 (1) C24 C6 0.1μF 0.1μ LTC6400CUD-20 OPEN OPEN MINI-CIRCUITS TCM4-19 (1:4) C18 0.1μF R10 R14 86.6Ω ( (1) 0.1μ SL2 R7 (2) ( 0.1μF 86.6Ω R13 C22 0Ω ...

Page 15

... RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... SNR = 82dB at 3V Supply, 4th Order Filter SNR = 82dB at 3V Supply, 4th Order Filter SNR = 76dB at 3V Supply, 4th Order Filter SNR = 76dB at 3V Supply, 4th Order Filter www.linear.com ● = –74dBc at 140MHz – 640020f LT 0707 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2007 ...

Related keywords