lmh6522sqe National Semiconductor Corporation, lmh6522sqe Datasheet

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lmh6522sqe

Manufacturer Part Number
lmh6522sqe
Description
High Performance Quad Dvga
Manufacturer
National Semiconductor Corporation
Datasheet
© 2011 National Semiconductor Corporation
High Performance Quad DVGA
General Description
The LMH6522 contains four, high performance, digitally con-
trolled variable gain amplifiers (DVGA). It has been designed
for use in narrowband and broadband IF sampling applica-
tions. Typically, the LMH6522 drives a high performance ADC
in a broad range of mixed signal and digital communication
applications such as mobile radio and cellular base stations
where automatic gain control (AGC) is required to increase
system dynamic range.
Each channel of LMH6522 has an independent, digitally con-
trolled attenuator and a high linearity, differential output, am-
plifier. All circuitry has been optimized for low distortion and
maximum system design flexibility. Power consumption is
managed by a three-state enable pin. Individual channels can
be disabled or placed into a Low Power Mode or a higher
performance, High Power Mode.
The LMH6522 digitally controlled attenuator provides precise
1dB gain steps over a 31dB range. The digital attenuator can
be controlled by either a SPI ™ Serial bus or a high speed
parallel bus.
The output amplifier has a differential output, allowing large
signal swings on a single 5V supply. The low impedance out-
put provides maximum flexibility when driving a wide range
filter designs or analog to digital converters. For applications
which have very large changes in signal level LMH6522 can
support up to 62dB of gain range by cascading channels.
The LMH6522 operates over the industrial temperature range
of −40°C to +85°C. The LMH6522 is available in a 54-Pin,
thermally enhanced, LLP package.
Performance Curve
SPI ™ is a trademark of Motorola, Inc.
301273
60
50
40
30
20
10
0
50
OIP3 vs Filter Input Resistance
f = 200 MHz
V OUT = 2V PPD
@ filter input
FILTER INPUT RESISTANCE (Ω)
100
LMH6522
150
Features
Applications
200
OIP3: 49dBm @ 200MHz
Noise Figure: 8.5dB
Voltage Gain: 26dB
1dB Gain Steps
−3dB bandwidth of 1400 MHz
Gain Step Accuracy: 0.2 dB
Disable function for each channel
Parallel and Serial gain control
Low Power Mode for power management flexibility
Small footprint LLP package
Cellular base stations
Wideband and narrowband IF sampling receivers
Wideband direct conversion
ADC Driver
250
300
35
30
25
20
15
10
5
30127381
www.national.com
July 29, 2011

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lmh6522sqe Summary of contents

Page 1

... The LMH6522 operates over the industrial temperature range of −40°C to +85°C. The LMH6522 is available in a 54-Pin, thermally enhanced, LLP package. Performance Curve SPI ™ trademark of Motorola, Inc. © 2011 National Semiconductor Corporation LMH6522 Features ■ OIP3: 49dBm @ 200MHz ■ ...

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Block Diagram www.national.com 30127332 2 ...

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General Description .............................................................................................................................. 1 Features .............................................................................................................................................. 1 Applications ......................................................................................................................................... 1 Performance Curve ............................................................................................................................... 1 Block Diagram ...................................................................................................................................... 2 Absolute Maximum Ratings .................................................................................................................... 4 Operating Ratings .................................................................................................................... 4 (Note 1) Connection Diagram ............................................................................................................................. 6 Ordering Information ............................................................................................................................. 6 Typical Performance Characteristics ...

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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 3) Differential Voltage ...

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Symbol Parameter Gain Step Error Gain Step Error Gain Step Phase Shift Gain Step Phase Shift Gain Step Switching Time Enable/ Disable Time Power Requirements ICC Supply Current P Power I Output Pin Bias Current BIAS ICC Disabled Supply Current ...

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... Note 7: Negative input current implies current flowing out of the device. Note 8: Drift determined by dividing the change in parameter at temperature extremes by the total temperature change. Connection Diagram Ordering Information Package Part Number LMH6522SQE 54-Pin LLP LMH6522SQ www.national.com , θ . The maximum allowable power dissipation at any ambient temperature is ...

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Pin Descriptions Pin Number Symbol Analog I INA+, INA - 44, 43 OUTA+, OUTA INB+, INB - 39, 38 OUTB+, OUTB- 11, 12 INC+, INC - 35, 34 OUTC+, OUTC- 16, 17 IND+, IND - 30, ...

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Pin List Pin Description 1 GND 2 INA+ 3 INA− 4 GND 5 MODE 6 GND 7 INB+ 8 INB− 9 GND 10 GND 11 INC+ 12 INC− 13 GND 14 GND 15 GND 16 IND+ 17 IND− 18 GND ...

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Typical Performance Characteristics 200MHz; Unless Specified). Frequency Response, 2dB Steps OIP3 vs Output Power OUTPUT POWER, EACH TONE (dBm) OIP3 vs Frequency 56 P OUT =4dBm / Tone 52 ...

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OIP3 vs Temperature High Power Mode Low Power Mode 40 -45 -30 - TEMPERATURE (Degrees C) Supply Current vs Temperature 500 High Power Mode Low Power Mode 475 450 ...

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HD2 vs Frequency, Low Power Mode - OUT = 10dBm - -50 -60 -70 -80 -90 -100 0 100 200 300 400 FREQUENCY (MHz) HD2 vs Attenuation -40 High Power Mode ...

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Isolation, Adjacent Channels - OUT OUT A - OUT OUT OUT D - OUT C -50 -60 -70 -80 -90 10 100 FREQUENCY (MHz) Channel ...

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Cumulative Amplitude Error 2.0 50 MHz 200 MHz 300 MHz 1.5 1.0 0.5 0.0 -0.5 -1 ATTENUATION (dB) Noise Figure vs Attenuation ...

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Gain Step Timing, 16dB Step 3 Output A4 Pin TIME (ns) Gain Step Timing, 4dB Step 3 Output A2 Pin ...

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Input Impedance 300 250 |Z| 200 150 100 50 0 -50 -100 0 100 200 300 400 FREQUENCY (MHz) Output Impedance 150 R jX 125 |Z| 100 -25 -50 ...

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Application Information INTRODUCTION The LMH6522 is a fully differential amplifier optimized for sig- nal path applications up to 400 MHz. The LMH6522 has a 100Ω input and a low impedance output. The gain is digitally controlled over ...

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FIGURE 2. LMH6522 Block Diagram 17 30127332 www.national.com ...

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BASIC CONNECTIONS A voltage between 4.75 V and 5.25 V should be applied to the supply pin labeled +5V. Each supply pin should be decoupled with a low inductance, surface-mount ceramic capacitor of 0.01uF as close to the device as ...

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FIGURE 4. Differential LC Conversion Circuit OUTPUT CHARACTERISTICS The LMH6522 has a low impedance output very similar to a traditional Op-amp output. This means that a wild range of loads can be driven with good performance. Matching load impedance for ...

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OIP3 and Gain Measured at Amplifier Output, Filter Back Terminated Printed circuit board (PCB) design is critical to high frequency performance. In order to ensure output stability the load matching resistors should be placed as close to the amplifier CASCADE ...

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DIGITAL CONTROL The LMH6522 will support two modes of control, parallel mode and serial mode (SPI compatible). Parallel mode is fastest and requires the most board space for logic line rout- ing. Serial mode is compatible with existing SPI compatible ...

Page 22

See Figure 12 external bias resistor. Because the SDO pin is a high impedance pin, the board capacitance present at the pin will restrict data out speed that can be achieved. For a RC limited circuit the ...

Page 23

R/Wb Read / Write bit. A value of 1 indicates a read operation, while a value of 0 indicates a write operation. Reserved Not used. Must be set to 0. ADDR: Address of register to be read or written. DATA ...

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Write Timing Data Input on SDI Pin 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 Serial ...

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POWER SUPPLIES The LMH6522 was designed primarily to be operated on 5V power supplies. The voltage range for V+ is 4.75V to 5.25V. Power supply accuracy of 2.5% or better is advised. When operated on a board with high speed ...

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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 inches (millimeters) unless otherwise noted 54-Pin Package NS Package Number SQA54A 27 www.national.com ...

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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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