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DC954A-C

Description
eval board for lt6402-20
CategoryDevelopment board/suite/development tools   
File Size197KB,4 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance  
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DC954A-C Overview

eval board for lt6402-20

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC954
LOW DISTORTION, LOW NOISE DIFFERENTIAL AMPLIFIER / ADC DRIVER
LT6402-6/-12/-20
DESCRIPTION
Demonstration circuit 954 features the LT6402 Differential
Amplifier and ADC Driver. It incorporates a variety of pas-
sive components to support configurations for varied ap-
plications. Single-ended or differential input and output
configurations are possible, and there is a calibration cir-
cuit to null out the effects of other circuit components.
DC954A-A contains the LT6402-6, DC954A-B contains
the LT6402-12, and DC954A-C contains the LT6402-20.
The LT6402 is a high-speed differential amplifier with su-
perior distortion and noise performance, perfect for de-
manding communications transceiver applications and
other high-speed mixed signal applications. The LT6402
accepts single-ended or differential inputs with almost no
difference in distortion performance. Another standout
feature of the LT6402 is the ability to independently adjust
the output common-mode voltage, which allows output
level shifting without any additional components. See the
LT6402 datasheet for more information.
Design files for this circuit board are available. Call
the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation.
QUICK START PROCEDURE
Table 1 shows the function of each SMA connector on the
board. Refer to Figure 1 for the connection diagram and
follow the procedure below:
1.
Connect the power supply as shown. The power labels
Table 1: DC954 SMA Connector Descriptions
CONNECTOR
FUNCTION
J1 (-IN)
of VCC, EN, and GND directly correspond to the VCC,
EN, and VEE pins of the LT6402, respectively. Voltages
other than +5V may be used as long as the voltage be-
tween VCC and GND is between 4.5V and 5.5V. Switch
SW1 enables or shuts down the LT6402; to enable the
part externally, see the Enable (Shutdown) section of
this Quick Start Guide.
2.
For network analyzer use, calibrate out board and trans-
Differential Input.
Connected to GND through resistor
R2 by default.
Resistor can be removed to drive the
DC954 differentially.
Differential Input. Use this connector to supply an in-
put to the DC954. Drive from a 50ohm signal source,
no external termination necessary.
Output Common-Mode Pin.
By default, 0.44•VCC is
supplied to this pin by a 14k resistor and an 11k re-
sistor.
Override this voltage with any low-impedance
DC voltage source.
Differential Output.
Connected to GND through 0Ω
resistor R14 by default.
Resistor can be removed for
differential output drive.
Differential Output. Resistively impedance-matched to
50 ohms, can be used to drive a 50ohm network ana-
lyzer input.
Calibration network input. Use with network analyzer
to calibrate out effects of board trace parasitics, trans-
formers, and SMA connectors.
J2 (+IN)
J3 (VOCM)
J4 (-OUT)
former effects using J6 and J7. There is a 1:1 imped-
ance transfer from J6 to J7, so external termination
may be necessary for a 50Ω match.
3.
Apply an input signal to J2. A low-distortion, low noise
J5 (+OUT)
signal source with an external high-order filter will yield
the best performance.
NOTE:
J6 (TEST IN)
DC954’s input is impedance-matched to 50Ω. No
external termination is necessary.
J7 (TEST OUT) Calibration network output.
4.
Observe the output via J5. By default, the unfiltered
outputs of the LT6402 are used. The output is imped-
ance-matched to 50Ω, suitable for the input of a net-
work or spectrum analyzer.
1

DC954A-C Related Products

DC954A-C LT6402CUD-20#PBF LT6402IUD-20#PBF LT6402CUD-20#TRPBF LT6402IUD-20#TRPBF
Description eval board for lt6402-20 IC OPAMP DIFF 300MHZ 16QFN IC OPAMP DIFF 300MHZ 16QFN IC OPAMP DIFF 300MHZ 16QFN IC OPAMP DIFF 300MHZ 16QFN
Brand Name - Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? - conform to conform to conform to conform to
Maker - Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code - QFN QFN QFN QFN
package instruction - HVQCCN, LCC12,.12SQ,20 HVQCCN, LCC12,.12SQ,20 HVQCCN, LCC12,.12SQ,20 HVQCCN, LCC12,.12SQ,20
Contacts - 16 16 16 16
Manufacturer packaging code - UD UD UD UD
Reach Compliance Code - compliant compliant compliant compliant
ECCN code - EAR99 EAR99 EAR99 EAR99
Amplifier type - OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER
Maximum average bias current (IIB) - 15 µA 15 µA 15 µA 15 µA
Nominal Common Mode Rejection Ratio - 70 dB 70 dB 70 dB 70 dB
Maximum input offset voltage - 10000 µV 10000 µV 10000 µV 10000 µV
JESD-30 code - S-PQCC-N16 S-PQCC-N16 S-PQCC-N16 S-PQCC-N16
JESD-609 code - e3 e3 e3 e3
length - 3 mm 3 mm 3 mm 3 mm
Humidity sensitivity level - 1 1 1 1
Number of functions - 1 1 1 1
Number of terminals - 16 16 16 16
Maximum operating temperature - 70 °C 85 °C 70 °C 85 °C
Package body material - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code - HVQCCN HVQCCN HVQCCN HVQCCN
Encapsulate equivalent code - LCC12,.12SQ,20 LCC12,.12SQ,20 LCC12,.12SQ,20 LCC12,.12SQ,20
Package shape - SQUARE SQUARE SQUARE SQUARE
Package form - CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) - 260 260 260 260
power supply - 5 V 5 V 5 V 5 V
Certification status - Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height - 0.8 mm 0.8 mm 0.8 mm 0.8 mm
Nominal slew rate - 400 V/us 400 V/us 400 V/us 400 V/us
Maximum slew rate - 37 mA 37 mA 37 mA 37 mA
Supply voltage upper limit - 5.5 V 5.5 V 5.5 V 5.5 V
Nominal supply voltage (Vsup) - 5 V 5 V 5 V 5 V
surface mount - YES YES YES YES
Temperature level - COMMERCIAL INDUSTRIAL COMMERCIAL INDUSTRIAL
Terminal surface - Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form - NO LEAD NO LEAD NO LEAD NO LEAD
Terminal pitch - 0.5 mm 0.5 mm 0.5 mm 0.5 mm
Terminal location - QUAD QUAD QUAD QUAD
Maximum time at peak reflow temperature - 30 30 30 30
width - 3 mm 3 mm 3 mm 3 mm
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