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Features
- 10GHz Gain-Bandwidth Product
- 88dB SFDR at 100MHz, 2VP-P
- 1.1nV/√Hz Input Noise Density
- Input Range Includes Ground
- External Resistors Set Gain (Min 1V/V)
- 3300V/μs Differential Slew Rate
- 52mA Supply Current
- 2.7V to 5.25V Supply Voltage Range
- Fully Differential Input and Output
- Adjustable Output Common Mode Voltage
- Low Power Shutdown
- Small 10-Lead 3mm × 2mm × 0.75mm QFN Package
Typical Application
Description
The LTC6409 is a very high speed, low distortion, differential amplifier. Its input common mode range includes ground, so that a ground-referenced input signal can be DC-coupled, level-shifted, and converted to drive an ADC differentially.
The gain and feedback resistors are external, so that the exact gain and frequency response can be tailored to each application. For example, the amplifier could be externally compensated in a no-overshoot configuration, which is desired in certain time-domain applications.
The LTC6409 is stable in a differential gain of 1. This allows for a low output noise in applications where gain is not desired. It draws 52mA of supply current and has a hardware shutdown feature which reduces current consumption to 100μA.
The LTC6409 is available in a compact 3mm × 2mm 10‑pin leadless QFN package and operates over a –40°C to 125°C temperature range.
3x2 QFN-10
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC6409CUDB#PBF | QFN | 10 | C | $6.39 | |
| LTC6409CUDB#TRMPBF | QFN | 10 | C | $6.34 | $4.55 |
| LTC6409CUDB#TRPBF | QFN | 10 | C | $4.50 | |
| LTC6409HUDB#PBF | QFN | 10 | H | $7.96 | |
| LTC6409HUDB#TRMPBF | QFN | 10 | H | $7.91 | $5.68 |
| LTC6409HUDB#TRPBF | QFN | 10 | H | $5.63 | |
| LTC6409IUDB#PBF | QFN | 10 | I | $7.02 | |
| LTC6409IUDB#TRMPBF | QFN | 10 | I | $6.97 | $5.00 |
| LTC6409IUDB#TRPBF | QFN | 10 | I | $4.95 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1591A | LTC6409 | 10GHz, 1nV/rt(Hz) Differential Amplifier/ADC Driver | $150.00 | |
| DC1760A | LTC2261-14 + LTC6409 ADC and Driver Combo Board,DC-100MHz, CMOS Outputs, req DC890 and DC1075 | $200.00 | |
| DC1945A | LTC2185 and LTC6409 Combo Board with differential inputs, req DC890, LVDS_XFMR and DC1075 | $200.00 | |
| DC2266A | LTC2107 + LTC6409 Demo Board | 16-Bit, 210Msps ADC and Driver Combo Board, DC-100MHz Input, DDR LVDS Outputs, (req DC1371 and DC2219) | $200.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1075A | Clock Divider board | $50.00 | |
| DC890B | USB Data Acquisition Controller, for PScope Evaluation Kits (up to 250Mbps, CMOS/LVDS) | $300.00 | |
| DC1371B | FMC High-Speed Data Acquisition Board | $1,950.00 | |
| DC2219A | Single-Ended to Differential Adaptor Board for High-Speed ADC Demoboards | $50.00 |