Datasheet LTC6401-26 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 1.6GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz |
| Seiten / Seite | 16 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Single-Ended to … |
| Dateiformat / Größe | PDF / 238 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Single-Ended to Differential ADC Driver at 140MHz IF
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LTC6401-26 1.6GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz
FEATURES DESCRIPTION
■ 1.6GHz –3dB Bandwidth The LTC®6401-26 is a high-speed differential amplifi er ■ Fixed Gain of 20V/V (26dB) targeted at processing signals from DC to 140MHz. The ■ –85dBc IMD3 at 70MHz (Equivalent OIP3 = 46.5dBm) part has been specifi cally designed to drive 12-, 14- and ■ –72dBc IMD3 at 140MHz (Equivalent OIP3 = 40dBm) 16-bit ADCs with low noise and low distortion, but can also ■ 1nV/√⎯H⎯z Internal Op Amp Noise be used as a general-purpose broadband gain block. ■ 1.5nV/√⎯H⎯z Total Input Referred Noise The LTC6401-26 is easy to use, with minimal support ■ 6.8dB Noise Figure circuitry required. The output common mode voltage is ■ Differential Inputs and Outputs set using an external pin, independent of the inputs, which ■ 50Ω Input Impedance eliminates the need of transformers or AC-coupling ca- ■ 2.85V to 3.5V Supply Voltage pacitors in many applications. The gain is internally fi xed ■ 45mA Supply Current (135mW) at 26dB (20V/V). ■ 1V to 1.6V Output Common Mode, Adjustable ■ DC- or AC-Coupled Operation The LTC6401-26 saves space and power compared to ■ Max Differential Output Swing 4.7V alternative solutions using IF gain blocks and transform- P-P ■ Small 16-Lead 3mm × 3mm × 0.75mm QFN Package ers. The LTC6401-26 is packaged in a compact 16-lead 3mm × 3mm QFN package and operates over the –40°C
APPLICATIONS
to 85°C temperature range. ■ Differential ADC Driver , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ■ Differential Driver/Receiver ■ Single Ended to Differential Conversion ■ IF Sampling Receivers ■ SAW Filter Interfacing
TYPICAL APPLICATION Single-Ended to Differential ADC Driver at 140MHz IF Equivalent OIP3 vs Frequency
60 3.3V 3.3V DIFFERENTIAL INPUT (NOTE 7) 50 0.1μF 1000pF 33pF 40 V+ 0.1μF 15Ω 10Ω 30 VDD V AIN+ IN +IN +OUT 150Ω L1 LTC6401-26 LTC6401-26 33pF LTC2208 OUTPUT IP3 (dBm) 20 0.1μF 24nH 15Ω 10Ω –IN –OUT AIN– 10 VOCM V VCM OCM NO RL 37.4Ω COILCRAFT 33pF V– LTC2208 RL = 200Ω 0603CS 0 130Msps 0 50 100 150 200 16-BIT ADC 1.25V 640126 TA01a FREQUENCY (MHz) 100Ω 0.1 640126 TA01b μF 640126f 1
FEATURES DESCRIPTION
■ 1.6GHz –3dB Bandwidth The LTC®6401-26 is a high-speed differential amplifi er ■ Fixed Gain of 20V/V (26dB) targeted at processing signals from DC to 140MHz. The ■ –85dBc IMD3 at 70MHz (Equivalent OIP3 = 46.5dBm) part has been specifi cally designed to drive 12-, 14- and ■ –72dBc IMD3 at 140MHz (Equivalent OIP3 = 40dBm) 16-bit ADCs with low noise and low distortion, but can also ■ 1nV/√⎯H⎯z Internal Op Amp Noise be used as a general-purpose broadband gain block. ■ 1.5nV/√⎯H⎯z Total Input Referred Noise The LTC6401-26 is easy to use, with minimal support ■ 6.8dB Noise Figure circuitry required. The output common mode voltage is ■ Differential Inputs and Outputs set using an external pin, independent of the inputs, which ■ 50Ω Input Impedance eliminates the need of transformers or AC-coupling ca- ■ 2.85V to 3.5V Supply Voltage pacitors in many applications. The gain is internally fi xed ■ 45mA Supply Current (135mW) at 26dB (20V/V). ■ 1V to 1.6V Output Common Mode, Adjustable ■ DC- or AC-Coupled Operation The LTC6401-26 saves space and power compared to ■ Max Differential Output Swing 4.7V alternative solutions using IF gain blocks and transform- P-P ■ Small 16-Lead 3mm × 3mm × 0.75mm QFN Package ers. The LTC6401-26 is packaged in a compact 16-lead 3mm × 3mm QFN package and operates over the –40°C
APPLICATIONS
to 85°C temperature range. ■ Differential ADC Driver , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ■ Differential Driver/Receiver ■ Single Ended to Differential Conversion ■ IF Sampling Receivers ■ SAW Filter Interfacing
TYPICAL APPLICATION Single-Ended to Differential ADC Driver at 140MHz IF Equivalent OIP3 vs Frequency
60 3.3V 3.3V DIFFERENTIAL INPUT (NOTE 7) 50 0.1μF 1000pF 33pF 40 V+ 0.1μF 15Ω 10Ω 30 VDD V AIN+ IN +IN +OUT 150Ω L1 LTC6401-26 LTC6401-26 33pF LTC2208 OUTPUT IP3 (dBm) 20 0.1μF 24nH 15Ω 10Ω –IN –OUT AIN– 10 VOCM V VCM OCM NO RL 37.4Ω COILCRAFT 33pF V– LTC2208 RL = 200Ω 0603CS 0 130Msps 0 50 100 150 200 16-BIT ADC 1.25V 640126 TA01a FREQUENCY (MHz) 100Ω 0.1 640126 TA01b μF 640126f 1