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Digitally Controlled, Variable-Gain, Differential ADC Driver/Amplifier

Industry's First Low-Distortion, IF Differential ADC Driver with Digitally Selectable Gain

Product Details

Key Features

Parametric specs for RF and IF Variable Gain Amplifiers
Gain Control Digital
# Channels 1
RF Freq. (MHz) (min) 30
RF Freq. (MHz) (max) 300
Digital Attenuation Range (dB) 23
Digital Attenuator Step Size (dB) 1
Gain (dB) (max) 20
Noise Figure (dB) 5.8
OIP3 (dBm) 40
OIP2 (dBm) 75
HD2 (dBc) -76
HD3 (dBc) -69
VCC (V) 4.75 to 5.25
ISUPPLY (mA) 240
Footprint (mm x mm) 6.4 x 6.5
Package/Pins TSSOP/20
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
7.2
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Simplified Block Diagram

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Parameters

Parametric specs for RF and IF Variable Gain Amplifiers
Gain Control Digital
# Channels 1
RF Freq. (MHz) (min) 30
RF Freq. (MHz) (max) 300
Digital Attenuation Range (dB) 23
Digital Attenuator Step Size (dB) 1
Gain (dB) (max) 20
Noise Figure (dB) 5.8
OIP3 (dBm) 40
OIP2 (dBm) 75
HD2 (dBc) -76
HD3 (dBc) -69
VCC (V) 4.75 to 5.25
ISUPPLY (mA) 240
Footprint (mm x mm) 6.4 x 6.5
Package/Pins TSSOP/20
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
7.2

Key Features

  • 30MHz to 300MHz Frequency Range
  • Single-Ended-to-Differential Conversion
  • -3dB to +20dB Variable Gain
  • 40dBm Output IP3 (at All Gain States and 70MHz)
  • 2nd Harmonic -76dBc
  • 3rd Harmonic -69dBc
  • Noise Figure: 5.8dB at Maximum Gain
  • Digitally Controlled Gain with 1dB Resolution and ±0.2dB Accuracy
  • Adjustable Bias Current

Applications/Uses

  • Automated Test Equipment (ATE)
  • Broadband Systems
  • Cell Phone Base Stations
  • High-Performance ADC Drivers
  • PHS/PAS Infrastructure
  • Receiver Gain Control
  • Terrestrial Links

Description

The MAX2055 high-performance, digitally controlled, variable-gain, differential analog-to-digital converter (ADC) driver/amplifier (DVGA) is designed for use from 30MHz to 300MHz in base-station receivers.

The device integrates a digitally controlled attenuator and a high-linearity single-ended-to-differential output amplifier, which can either eliminate an external transformer, or can improve the even-order distortion performance of a transformer-coupled circuit, thus relaxing the requirements of the anti-alias filter preceding an ADC. Targeted for ADC driver applications to adjust gain either dynamically or as a one-time channel gain setting, the MAX2055 is ideal for applications requiring high performance. The attenuator provides 23dB of attenuation range with ±0.2dB accuracy.

The MAX2055 is available in a thermally enhanced 20-pin TSSOP-EP package and operates over the -40°C to +85°C temperature range.

Simplified Block Diagram

MAX2055: Typical Application Circuit MAX2055: Typical Application Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.