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LT1993-2

NOT RECOMMENDED FOR NEW DESIGNS

800MHz Low Distortion, Low Noise Differential Amplifier ADC Driver (Av = 2V/V)

Data Sheet (Rev. B) Product Selection Table
Viewing:

Overview

  • 800MHz −3dB Bandwidth
  • Fixed Gain of 2V/V (6dB)
  • Low Distortion:
    • 38dBm OIP3, –70dBc HD3 (70MHz, 2VP-P)
    • 51dBm OIP3, –94dBc HD3 (10MHz, 2VP-P)
  • Low Noise: 12.3dB NF, en = 3.8nV/√Hz (70MHz)
  • Differential Inputs and Outputs
  • Additional Filtered Outputs
  • Adjustable Output Common Mode Voltage
  • DC- or AC-Coupled Operation
  • Minimal Support Circuitry Required
  • Small 0.75mm Tall 16-Lead 3 × 3 QFN Package

The LT1993-2 is a low distortion, low noise Differential Amplifier/ADC driver for use in applications from DC to 800MHz. The LT1993-2 has been designed for ease of use, with minimal support circuitry required. Exceptionally low input-referred noise and low distortion products (with either single-ended or differential inputs) make the LT1993-2 an excellent solution for driving high speed 12-bit and 14-bit ADCs. In addition to the normal unfi ltered outputs (+OUT and –OUT), the LT1993-2 has a built-in 175MHz differential low pass filter and an additional pair of filtered outputs (+OUTFILTERED, –OUTFILTERED) to reduce external filtering components when driving high speed ADCs. The output common mode voltage is easily set via the VOCM pin, eliminating either an output transformer or AC-coupling capacitors in many applications.

The LT1993-2 is designed to meet the demanding requirements of communications transceiver applications. It can be used as a differential ADC driver, a general-purpose differential gain block, or in any other application requiring differential drive. The LT1993-2 can be used in data acquisition systems required to function at frequencies down to DC.

The LT1993-2 operates on a 5V supply and consumes 100mA. It comes in a compact 16-lead 3 × 3 QFN package and operates over a –40°C to 85°C temperature range.

Applications

  • Differential ADC Driver for:
    • Imaging
    • Communications
  • Differential Driver/Receiver
  • Single Ended to Differential Conversion
  • Differential to Single Ended Conversion
  • Level Shifting
  • IF Sampling Receivers
  • SAW Filter Interfacing/Buffering
LT1993-2
800MHz Low Distortion, Low Noise Differential Amplifier ADC Driver (Av = 2V/V)
LT1993-2 Application Circuit LT1993-2 Pin Configuration LT1993-2 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 2

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Software Resources

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT1993-10
  • LT1993-2
  • LT1993-4

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

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Sys-Parameter Models for Keysight Genesys

Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.

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LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC900A-01U

Combo Demo Board for LTC2254 and LT1993-2 (6dB) Requires DC718

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Product Details

DC900A-01U Demo Board for:
LT1993-2 800MHz Low Distortion, Low Noise Differential Amplifier ADC Driver (Av = 2V/V)
LTC2254 14-Bit, 105Msps Low Power 3V ADCs

eval board
schematic 2
DC800A-A

LT1993CUD-2 | 800MHz Diff In/Out ADC Driver

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Product Details

DC800A-A: Demo Board for the LT1993-2 800MHz Low Distortion, Low Noise Differential Amplifier ADC Driver (AV = 2V/V)

eval board
schematic 3
DC900A-01V

Combo Demo Board for LTC2255 and LT1993-2 (6dB) Requires DC718

Buy Now View Details

Product Details

DC900A-01V Demo Board for:
LT1993-2 800MHz Low Distortion, Low Noise Differential Amplifier ADC Driver (Av = 2V/V)
LTC2255 14-Bit, 125Msps Low Power 3V ADCs

eval board
schematic 4
DC900A-01E

Combo Demo Board for LTC2249 and LT1993-2 (6dB) Requires DC718

Buy Now View Details

Product Details

DC900A-01E Demo Board for:
LTC2249 14-Bit, 80Msps Low Power 3V ADC
LT1993-2 800MHz Low Distortion, Low Noise Differential Amplifier ADC Driver (Av = 2V/V)


 
DC900A-01U
Combo Demo Board for LTC2254 and LT1993-2 (6dB) Requires DC718
DC900A-01E - Schematic
DC800A-A
LT1993CUD-2 | 800MHz Diff In/Out ADC Driver
DC800A-A - Schematic
DC900A-01V
Combo Demo Board for LTC2255 and LT1993-2 (6dB) Requires DC718
DC900A-01E - Schematic
DC900A-01E
Combo Demo Board for LTC2249 and LT1993-2 (6dB) Requires DC718
DC900A-01E - Schematic

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