MAX2055

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

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

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Status Explanations for product status codes

Active: In Production.

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.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 636kB)
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An evaluation kit is available: MAX2055EVKIT

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
   

Key Specifications:

RF and IF Variable Gain Amplifiers
Part Number Gain Cntl. Channels RF Freq.
(MHz)
RF Freq.
(MHz)
Digital Attenuation Range
(dB)
Digital Attenuator Step Size
(dB)
Gain
(dB)
Noise Figure
(dB)
OIP3
(dBm)
OIP2
(dBm)
HD2
(dBc)
HD3
(dBc)
VCC
(V)
ISUPPLY
(mA)
Footprint
(mm x mm)
Package/Pins Oper. Temp.
(°C)
Budgetary Price
min max max See Notes
MAX2055  Digital 1 30 300 23 1 20 5.8 40 75 -76 -69 4.75 to 5.25 240 6.4 x 6.5
TSSOP-EP/20
-40 to +85 $4.97 @1k
See All RF and IF Variable Gain Amplifiers (14)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Diagram

MAX2055: Typical Application Circuit
Typical Application Circuit

More Information

New Product Press Release 2003-06-24 ]

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Information Index

Document Ref.: 19-2799 Rev 0; 2003-05-19
This page last modified: 2009-10-13




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