Features and Benefits
- Fully Differential Input and Output
- Low Noise: 1.5nV/√Hz RTI
- Very Low Distortion:
- LTC6404-1 (2VP-P , 10MHz): –91dBc
- LTC6404-2 (2VP-P , 10MHz): –96dBc
- LTC6404-4 (2VP-P , 10MHz): –101dBc
- Closed-Loop –3dB Bandwidth: 600MHz
- Slew Rate: 1200V/μs (LTC6404-4)
- Adjustable Output Common Mode Voltage
- Rail-to-Rail Output Swing
- Input Range Extends to Ground
- Large Output Current: 85mA (Typ)
- DC Voltage Offset < 2mV (Max)
- Low Power Shutdown
- Tiny 3mm × 3mm × 0.75mm 16-Pin QFN Package
The LTC6404 is a family of AC precision, very low noise, low distortion, fully differential input/output amplifiers optimized for 3V, single supply operation.
The LTC6404-1 is unity-gain stable. The LTC6404-2 is designed for closed-loop gains greater than or equal to 2V/V. The LTC6404-4 is designed for closed-loop gains greater than or equal to 4V/V. The LTC6404 closed-loop bandwidth extends from DC to 600MHz. In addition to the normal unﬁltered outputs (OUT+ and OUT–), the LTC6404 has a built-in 88.5MHz differential single-pole lowpass ﬁlter and an additional pair of ﬁltered outputs (OUTF+, OUTF–). An input referred voltage noise of 1.5nV/√Hz make the LTC6404 able to drive state-of-the-art 16-/18-bit ADCs while operating on the same supply voltage, saving system cost and power. The LTC6404 is characterized, and maintains its performance for supplies as low as 2.7V and can operate on supplies up to 5.25V. It draws only 27.3mA, and has a hardware shutdown feature which reduces cur- rent consumption to 250μA.
The LTC6404 family is available in a compact 3mm × 3mm 16-pin leadless QFN package and operates over a –40°C to 125°C temperature range.
- Differential Input A/D Converter Driver
- Single-Ended to Differential Conversion/Amplification
- Common Mode Level Translation
- Low Voltage, Low Noise, Signal Processing
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (7)
DC1058A-D: Demo Board for the LTC2207 16-Bit, 105Msps ADC and LTC6404 600MHz, Low Noise, High Precision Fully Differential Input/Output Ampliﬁer/Driver.
DC1058A-C: Demo Board for LTC2207 16-Bit, 105Msps ADC and LTC6404 600MHz, Low Noise, High Precision Fully Differential Input/Output Ampliﬁer/Driver.
DC1058A-B: Demo Board for the LTC2207 16-Bit, 105Msps ADC and LTC6404 600MHz, Low Noise, High Precision Fully Differential Input/Output Ampliﬁer/Driver.
Demonstration circuit 2623A features the LTC6404-1 amplifier. The DC2623A includes two of these amplifiers and is designed to drive the inputs of the DC2290 demo board. The DC2290 features the LTC2387 18-bit, 15Msps high speed SAR ADC. The linearity and low noise of the LTC6404-1 make it an ideal candidate to drive the LTC2387 at frequencies above 1MHz.
Note: The DC2623A is configured to provide a voltage gain of 4 from either a single-ended source or a differential one.
Tools & Simulations
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LTC6404 Companion Parts
Recommended Related Parts
Product Selector Card (1)
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.