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AD8376:  Ultralow Distortion IF Dual VGA

The AD8376 is a dual channel, digitally controlled, variable gain wide bandwidth amplifier that provides precise gain control, high IP3, and low noise figure. The excellent distortion performance and high signal bandwidth make the AD8376 an excellent gain control device for a variety of receiver applications.

Using an advanced high speed SiGe process and incorporating proprietary ...More

AD8376:  Ultralow Distortion IF Dual VGA

Product Description

The AD8376 is a dual channel, digitally controlled, variable gain wide bandwidth amplifier that provides precise gain control, high IP3, and low noise figure. The excellent distortion performance and high signal bandwidth make the AD8376 an excellent gain control device for a variety of receiver applications.

Using an advanced high speed SiGe process and incorporating proprietary distortion cancellation techniques, the AD8376 achieves 50 dBm output IP3 at 200 MHz.

The AD8376 provides a broad 24 dB gain range with 1 dB resolution. The gain of each channel is adjusted through dedicated 5-pin control interfaces and can be driven using standard TTL levels. The open-collector outputs provide a flexible interface, allowing the overall signal gain to be set by the loading impedance. Thus, the signal voltage gain is directly proportional to the load.

Each channel of the AD8376 can be individually powered on by applying the appropriate logic level to the ENBA and ENBB power enable pins. The quiescent current of the AD8376 is typically 130 mA per channel. When powered down, the AD8376 consumes less than 5 mA and offers excellent input-to-output isolation, lower than −50 dB at 200 MHz.

Fabricated on an Analog Devices, Inc., high speed SiGe process, the AD8376 is supplied in a compact, thermally enhanced, 5 mm × 5mm 32-lead LFCSP package and operates over the temperature range of −40°C to +85°C.

Applications
  • Differential ADC drivers
  • Main and diversity IF sampling receivers
  • Wideband multichannel receivers
  • Instrumentation

    • Data Sheet, Rev. 0, 8/07

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    • Dual independent digitally controlled VGAs
    • Bandwidth of 700 MHz (−3 dB)
    • Gain range: −4 dB to +20 dB
    • Step size: 1 dB ± 0.2 dB
    • Differential input and output
    • Noise figure: 8.7 dB @ maximum gain
    • Output IP3 of ~50 dBm at 200 MHz
    • Output P1dB of 20 dBm at 200 MHz
    • Dual parallel 5-bit control interface
    • Provides constant SFDR vs. gain
    • Power-down control
    • Single 5 V supply operation
    • -3 dB BW (MHz): 700MHz
    • Gain Low End (dB): -4dB
    • Gain High End (dB): +20dB
    • Voltage Supply (V): 5
    • Package: 32-Lead CSP

    Functional Block Diagram for AD8376

    Circuits from the Lab

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    Part# Function -3 dB BW (MHz) Gain (dB) Gain Low End (dB) Gain High End (dB) Gain Control Step (dB) Distortion (2nd) (dBc) Distortion (3rd) (dBc) Voltage Supply (V) CSO (dBc) CTB (dBc) Package Price* (1000-4999)
    AD8123 Equalizer 120 55 - - - - - - - - 40-Lead LFCSP $7.88
    AD8128 Equalizer 120 20 - - - - - - - - 8-Lead LFCSP $2.62
    AD8134 Driver 450 - - - - - - - - - 24-Lead LFCSP $2.62
    AD8143 Receiver 260 - - - - - - - - - 32-Lead CSP $2.58
    AD8145 Receiver 500 - - - - -67 -88 - - - 32-Lead CSP $3.03
    AD8146 Driver 700 - - - - - - - - - 24-Lead LFCSP $2.92
    AD8147 Driver 600 - - - - - - - - - 24-Lead LFCSP $3.03
    AD8148 Driver 700 - - - - - - - - - 24-Lead LFCSP $3.13
    AD8260 Powerline Driver/Receiver 180 30 -6 +24 - -70 -58 +/- 5 - - - $3.84
    AD8264 - 235 24 0 +24 - -60 -53 +/- 5 - - 40-Lead LFCSP $11.95
    AD8320 CATV Line Driver 150 n/a -10 +26 - n/a n/a 5 to 12 - - 20-Lead SOIC -
    AD8321 CATV Line Driver 120 53 -27.4 +26 0.75 -51 -51 9 - - 20-Lead SOIC $4.40
    AD8322 CATV Line Driver 180 42 -12.6 +29.5 6 -52 -53 5 - - 28-Lead TSSOP $3.19
    AD8323 CATV Line Driver 100 53.5 -26 +27.5 0.75 -71 -55 5 - - 28-Lead TSSOP $3.34
    AD8324 CATV Line Driver 100 59 -25.5 +33.5 1 -58 -54 3.3 - - 20-Lead LFCSP, 20-Lead QSOP $1.73
    AD8325 CATV Line Driver 100 59 -29.5 +30 0.75 -60 -54 5 - - 28-Lead TSSOP $3.34
    AD8326 CATV Line Driver 100 54 -26 +27.5 0.75 -55 - 7 to 12 - - 28-Lead PSOP, 28-Lead TSSOP $3.95
    AD8327 CATV Line Driver 160 48 -18 +30 6.02 -54 -57 5 - - 20-Lead TSSOP $3.80
    AD8328 CATV Line Driver 107 59 -27.5 +31.5 1 -59 -52 5 - - 20-Lead LFCSP, 20-Lead QSOP $1.92
    AD8336 - 115 - -14 +46 - - - - - - 16-Lead LFCSP $4.59
    AD8366 - 1000 16 +4.5 +20.5 0.25 - - 4.5 to 5.5 - - 32-Lead CSP -
    AD8368 - 800 34 -12 +22 - - - 4.5 to 5.5 - - 24-Lead LFCSP $4.60
    AD8372 - 130 41 -9 +32 1 - - 4.5 to 5.5 - - 32-Lead CSP $6.58
    AD8375 - 630 - -4 +20 - - - 5 - - 24-Lead LFCSP $4.54
    AD8376 - 700 - -4 +20 - - - 5 - - 32-Lead CSP $6.57
    AD8398 Driver 165 - - - - - - - - - - $1.77
    ADA4302-4 Active RF Splitter 1300 4.6 n/a n/a - - - 5 -73 -66 20-Lead LFCSP $2.63
    ADA4310-1 Driver 190 - - - - - - - - - 10-Lead uSOIC, 16-Lead LFCSP $1.05
    ADA4932-1 ADC Driver 560 - - - - -72 -80 3 to 11 - - 16-Lead LFCSP $2.95
    ADA4932-2 ADC Driver 560 - - - - -72 -80 3 to 11 - - 24-Lead LFCSP $5.29
    ADA4938-1 ADC Driver 1000 - - - - -82 -82 4.5 to 11 - - 16-Lead LFCSP, 24-Lead LFCSP $3.79
    ADA4938-2 ADC Driver 1000 - - - - -82 -82 4.5 to 11 - - 16-Lead LFCSP, 24-Lead LFCSP $5.69
    ADA4950-1 ADC Driver 750 - - - - -80 -84 3 to 11 - - 16-Lead LFCSP, 24-Lead LFCSP $2.99
    ADA4950-2 ADC Driver 750 - - - - -80 -84 3 to 11 - - 16-Lead LFCSP, 24-Lead LFCSP $5.29
    ADL5530 IFA 1000 16.8 - - - - - - - - 8-Lead LFCSP $1.58
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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.