LMH6521SQ/NOPB National Semiconductor, LMH6521SQ/NOPB Datasheet

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LMH6521SQ/NOPB

Manufacturer Part Number
LMH6521SQ/NOPB
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of LMH6521SQ/NOPB

Lead Free Status / Rohs Status
Compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LMH6521SQ/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
© 2011 National Semiconductor Corporation
High Performance Dual DVGA
General Description
The LMH6521 contains two high performance, digitally con-
trolled variable gain amplifiers (DVGA).
Both channels of the LMH6521 have an independent, digitally
controlled attenuator followed by a high linearity, differential
output amplifier. Each block has been optimized for low dis-
tortion and maximum system design flexibility. Each channel
has a high speed power down mode.
The internal digitally controlled attenuator provides precise
0.5dB gain steps over a 31.5dB range. Serial and parallel
programming options are provided. Serial mode program-
ming utilizes the SPI ™ interface. A Pulse mode is also offered
where simple up or down commands can change the gain one
step at a time.
The output amplifier has a differential output allowing 10V
signal swings on a single 5V supply. The low impedance out-
put provides maximum flexibility when driving filters or analog
to digital converters.
SPI ™ is a trademark of Motorola, Inc.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
LMH6521 Block Diagram
301201
30120102
LMH6521
PPD
Features
Applications
OIP3 of 48.5 dBm at 200 MHz
Maximum voltage gain of 26 dB
Gain range of 31.5 dB with 0.5dB step size
Channel Gain Matching of ±0.04 dB
Noise figure of 7.3 dB at maximum gain
-3 dB bandwidth of 1200 MHz
Low power dissipation
Independent channel power down
Three gain control modes:
•Parallel interface
•Serial interface (SPI)
•Pulse mode interface
Temperature Range –40°C to +85°C
Thermally enhanced, 32–Pin LLP package
Cellular base stations
Wideband and narrowband IF sampling receivers
Wideband direct conversion
Digital pre-distortion
ADC driver
-0.05
-0.10
-0.15
-0.20
0.20
0.15
0.10
0.05
0.00
Channel Matching Error (Ch A — Ch B)
0
4
ATTENUATION (dB)
8
Gain Matching Error
Phase Matching Error
12 16 20 24 28 32
www.national.com
July 26, 2011
-0.5
-1.0
-1.5
-2.0
2.0
1.5
1.0
0.5
0.0
30120180

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LMH6521SQ/NOPB Summary of contents

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... The low impedance out- put provides maximum flexibility when driving filters or analog to digital converters. LMH6521 Block Diagram SPI ™ trademark of Motorola, Inc. TRI-STATE ® registered trademark of National Semiconductor Corporation. © 2011 National Semiconductor Corporation LMH6521 Features ■ OIP3 of 48.5 dBm at 200 MHz ■ ...

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General Description .............................................................................................................................. 1 Features .............................................................................................................................................. 1 Applications ......................................................................................................................................... 1 Absolute Maximum Ratings .................................................................................................................... 3 Operating Ratings .................................................................................................................... 3 (Note 1) Connection Diagram ............................................................................................................................. 5 Ordering Information ............................................................................................................................. 5 Typical Performance Characteristics ....................................................................................................... 8 Application Information ........................................................................................................................ 12 Introduction ................................................................................................................................ ...

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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model Machine Model Charged Device Model Positive Supply Voltage (Pin 14, 27) Differential Voltage between Any Two Grounds ...

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Symbol Parameter Gain Accuracy Gain Step Size Channel Gain Matching Channel Phase Matching Cumulative Gain Error Cumulative Phase Shift Gain Step Switching Time Gain Temperature Sensitivity Power Requirements VCC Supply Voltage ICC Supply Current ICC Disabled Supply Current All Digital ...

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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications, see the Electrical ...

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Pin Descriptions Pin Number Symbol Analog I/O 30, 11 INA+, INB+ 29, 12 INA−, INB− 24, 17 OUTA+, OUTB+ 23, 18 OUTA−, OUTB− Power 13, 15, 26, 28, GND center pad 14, 27 +5V Common Control Pins 4, 5 MOD0, ...

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Digital Control Mode Pin Functions Pin Number Parallel Mode (MOD0) LOGIC HIGH (MOD0=1) 5 (MOD1) LOGIC HIGH (MOD1= ...

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Typical Performance Characteristics V+ = 5V, Differential OUT PP Frequency Response 2dB Gain Steps OIP3 vs. Frequency OUT = 4 dBm / tone 25 0 100 200 ...

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Third Order Harmonic Distortion vs. Frequency - ° ° °C -70 -80 -90 -100 P OUT = 6 dBm -110 50 100 150 200 250 300 350 400 FREQUENCY (MHz) ...

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Second Order Harmonic Distortion at 200 MHz -40 ATT = 0 dB ATT = 8 dB ATT = 16 dB -50 ATT = 24 dB -60 -70 -80 - 200 MHz -100 - OUTPUT POWER (dBm) ...

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Supply Current vs. Temperature 250 Both Channels Enabled 240 230 220 210 5.5V 200 -40 - 100 TEMPERATURE (degrees) Channel To Channel Isolation -30 -40 -50 Ch ...

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Application Information Introduction The LMH6521 is a dual digitally controlled variable gain am- plifier designed for narrowband and wideband intermediate frequency sampling applications. The LMH6521 is optimized for accurate 0.5 dB gain steps with exceptional gain and phase matching between ...

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INPUT CHARACTERISTICS The LMH6521 input impedance is set by internal resistors to a nominal 200Ω. At higher frequencies device parasitic reac- tances will start to impact the input impedances. Refer to the input impedance graph in the typical characteristics section ...

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PARALLEL MODE (MOD1= 1, MOD0 = 1) When designing a system that requires very fast gain changes parallel mode is the best selection. Refer to Control Mode Pin Functions table for pin definitions of the LMH6521 in parallel mode. The ...

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SDO is the data output pin and is normally at TRI-STATE and is driven only when SCSb is asserted. Upon SCSb as- sertion, contents of the register addressed during the first byte are shifted out with the second 8 SCLK ...

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Parameter t CSH t CSS t OZD t ODZ t OD www.national.com FIGURE 11. Serial Mode 4–wire Connection FIGURE 12. Read Timing Read Timing Data Output on SDO Pin Description Chip select hold time Chip select setup time Initial output ...

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Parameter Description t Minimum clock low time (clock duty dycle Minimum clock high time (clock duty cycle Input data setup time SU t Input data hold time H PULSE MODE (MOD1= 0, MOD0 = 1) Pulse ...

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FIGURE 17. Sample Bandpass Filter ADC Noise Filter Table IF Frequency Bandpass Filter Component Values low show values for some common IF frequencies for 17. The filter shown in Figure 17 offers a good compromise between bandwidth, noise rejection and ...

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COMPATIBLE HIGH SPEED ANALOG TO DIGITAL CONVERTERS Product Number ADC12L063 62 ADC12DL065 65 ADC12L066 66 ADC12DL066 66 CLC5957 70 ADC12L080 80 ADC12DL080 80 ADC12C080 80 ADC12C105 105 ADC12C170 170 ADC12V170 170 ADC14C080 80 ADC14C105 105 ADC14DS105 105 ADC14155 155 ADC14V155 ...

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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 32-Pin Package NS Package Number SQA32A 20 ...

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Notes 21 www.national.com ...

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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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