LT1994 - Low Noise, Low Distortion Fully Differential Input/Output Amplifier/Driver

The LT1994 is a high precision, very low noise, low distortion, fully differential input/output amplifier optimized for 3V, single supply operation. The LT1994’s output common mode voltage is independent of the input common mode voltage, and is adjustable by applying a voltage on the VOCM pin. A separate internal common mode feedback path provides accurate output phase balancing and reduced even-order harmonics. This makes the LT1994 ideal for level shifting ground referenced signals for driving differential input, single supply ADCs.

The LT1994 output can swing rail-to-rail and is capable of sourcing and sinking up to 85mA. In addition to the low distortion characteristics, the LT1994 has a low input referred voltage noise of 3nV/√Hz. This part maintains its performance for supply voltages as low as 2.375V. It draws only 13.3mA of supply current and has a hardware shutdown feature that reduces current consumption to 225μA.

The LT1994 is available in an 8-pin MSOP or 8-pin DFN package.

  • Fully Differential Input and Output
  • Wide Supply Range: 2.375V to 12.6V
  • Rail-to-Rail Output Swing
  • Low Noise: 3nV/√Hz
  • Low Distortion, 2VP-P, 1MHz: –94dBc
  • Adjustable Output Common Mode Voltage
  • Unity Gain Stable
  • Gain-Bandwidth: 70MHz
  • Slew Rate: 65V/μs
  • Large Output Current: 85mA
  • DC Voltage Offset <2mV MAX
  • Open-Loop Gain: 100V/mV
  • Low Power Shutdown
  • 8-Pin MSOP or 3mm × 3mm DFN Package
Typical Application
LT1994 Typical Application
LT1994 Typical Application
  • Differential Input A/D Converter Driver
  • Single-Ended to Differential Conversion
  • Differential Amplifier cation with Common Mode Translation
  • Rail-to-Rail Differential Line Driver/Receiver
  • Low Voltage, Low Noise, Differential Signal Processing
LT1994 Package Drawing
LT1994 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT1994CDD#PBF3x3 DFN-8C$2.35$1.65
LT1994CDD#TRPBF3x3 DFN-8C$1.71
LT1994HDD#PBF3x3 DFN-8H$2.70$1.90
LT1994HDD#TRPBF3x3 DFN-8H$1.96
LT1994IDD#PBF3x3 DFN-8I$2.70$1.90
LT1994IDD#TRPBF3x3 DFN-8I$1.96
LT1994MPDD#PBF3x3 DFN-8MP$6.75$4.84
LT1994MPDD#TRPBF3x3 DFN-8MP$4.90
Demo Boards
Part NumberDescriptionPrice
DC1058A-ACombo Demoboard for LTC2203 and LT1994, req. DC718$200.00
DC961ALT1994 70MHz Fully Differential Amplifier/Driver$50.00
Companion Boards
Part NumberDescriptionPrice
DC718CUSB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps)$300.00
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
Related Products
LT1994 - 低噪声、低失真全差分输入/输出放大器/驱动器
LT1994 - Low Noise, Low Distortion Fully Differential Input/Output Amplifier/Driver
LT1994 - 全差分 16 位 ADC 驱动器在电压低至 2.375V 时保证工作
R421 Reliability Data
R447 Reliability Data
High Speed Amplifiers/ADC Drivers
Dec 2005 Fully Differential Amplifier with Rail-to-Rail Outputs Offers 16-Bit Performance at 1MHz on a Single 2.5V Supply
Fully Differential 16-bit ADC Driver Guarantees Operation Down to 2.375V
LT1994 Footprints and Symbols