MAX2055

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

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


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.
MAX2055: Typical Application Circuit MAX2055: Typical Application Circuit Enlarge+

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
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 $5.04 @1k
See All RF and IF Variable Gain Amplifiers (17)
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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX2055EVKIT: Evaluation Kit for the MAX2055

Related Resources


MAX2175
RF to Bits Automotive Radio Tuner

  • RF to Bits Architecture with I2S Output
  • Single Supply Voltage of +3.3V
  • Integrated VHF Band-III Loop-Through

MAX2769C
Universal GNSS Receiver

  • GPS/GLONASS/Galileo/BeiDou Systems
  • Dual-Input Selectable LNA for Separate Passive and Active Antenna Inputs
  • 1.4dB Cascaded Noise Figure and 110dB of Cascaded Gain with Gain Control Range of 59dB From PGA