Datasheet LTC6400-8 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz |
| Pages / Page | 16 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Equivalent … |
| File Format / Size | PDF / 224 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Equivalent Output IP3 vs Frequency
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LTC6400-8 2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz
FEATURES DESCRIPTION
n 2.2GHz –3dB Bandwidth The LTC®6400-8 is a high-speed differential amplifi er tar- n Fixed Gain of 2.5V/V (8dB) geted at processing signals from DC to 300MHz. The part n –99dBc IMD3 at 70MHz (Equivalent OIP3 = 53.4dBm) has been specifi cally designed to drive 12-, 14- and 16-bit n –61dBc IMD3 at 300MHz (Equivalent OIP3 = 34.8dBm) ADCs with low noise and low distortion, but can also be n 1nV/√Hz Internal Op Amp Noise used as a general-purpose broadband gain block. n 7.6dB Noise Figure The LTC6400-8 is easy to use, with minimal support cir- n Differential Inputs and Outputs cuitry required. The output common mode voltage is set n 400Ω Input Impedance using an external pin, independent of the inputs, which n 2.85V to 3.5V Supply Voltage eliminates the need for transformers or AC-coupling ca- n 85mA Supply Current (255mW) pacitors in many applications. The gain is internally fi xed n 1V to 1.6V Output Common Mode, Adjustable at 8dB (2.5V/V). n DC- or AC-Coupled Operation n Max Differential Output Swing 4.8V The LTC6400-8 saves space and power compared to al- P-P n Small 16-Lead 3mm × 3mm × 0.75mm QFN Package ternative solutions using IF gain blocks and transformers. The LTC6400-8 is packaged in a compact 16-lead 3mm ×
APPLICATIONS
3mm QFN package and operates over the –40°C to 85°C temperature range. n Differential ADC Driver L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Differential Driver/Receiver n Single Ended to Differential Conversion n IF Sampling Receivers n SAW Filter Interfacing
TYPICAL APPLICATION
3.3V 3.3V
Equivalent Output IP3 vs Frequency
70 (NOTE 7) C2 C1 CF2 0.1μF 1000pF 33pF 60 C3 V+ R R 50 S1 S3 0.1μF 15Ω 10Ω VDD V AIN+ IN +IN +OUT 40 R1 C4 L1 C 59.0Ω LTC6400-8 F1 LTC2208 R 24nH 33pF R 30 0.1μF S2 S4 15Ω 10Ω –IN –OUT OUTPUT IP3 (dBm) AIN– V 20 V CM R2 OCM CF3 27.4Ω COILCRAFT V– 33pF LTC2208 10 0603CS 130Msps 1.25V 16-Bit ADC 64008 TA01a 0 C5 R3 0 50 100 150 200 250 300 0.1μF 100Ω FREQUENCY (MHz) 64008 TA01b 64008f 1
FEATURES DESCRIPTION
n 2.2GHz –3dB Bandwidth The LTC®6400-8 is a high-speed differential amplifi er tar- n Fixed Gain of 2.5V/V (8dB) geted at processing signals from DC to 300MHz. The part n –99dBc IMD3 at 70MHz (Equivalent OIP3 = 53.4dBm) has been specifi cally designed to drive 12-, 14- and 16-bit n –61dBc IMD3 at 300MHz (Equivalent OIP3 = 34.8dBm) ADCs with low noise and low distortion, but can also be n 1nV/√Hz Internal Op Amp Noise used as a general-purpose broadband gain block. n 7.6dB Noise Figure The LTC6400-8 is easy to use, with minimal support cir- n Differential Inputs and Outputs cuitry required. The output common mode voltage is set n 400Ω Input Impedance using an external pin, independent of the inputs, which n 2.85V to 3.5V Supply Voltage eliminates the need for transformers or AC-coupling ca- n 85mA Supply Current (255mW) pacitors in many applications. The gain is internally fi xed n 1V to 1.6V Output Common Mode, Adjustable at 8dB (2.5V/V). n DC- or AC-Coupled Operation n Max Differential Output Swing 4.8V The LTC6400-8 saves space and power compared to al- P-P n Small 16-Lead 3mm × 3mm × 0.75mm QFN Package ternative solutions using IF gain blocks and transformers. The LTC6400-8 is packaged in a compact 16-lead 3mm ×
APPLICATIONS
3mm QFN package and operates over the –40°C to 85°C temperature range. n Differential ADC Driver L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Differential Driver/Receiver n Single Ended to Differential Conversion n IF Sampling Receivers n SAW Filter Interfacing
TYPICAL APPLICATION
3.3V 3.3V
Equivalent Output IP3 vs Frequency
70 (NOTE 7) C2 C1 CF2 0.1μF 1000pF 33pF 60 C3 V+ R R 50 S1 S3 0.1μF 15Ω 10Ω VDD V AIN+ IN +IN +OUT 40 R1 C4 L1 C 59.0Ω LTC6400-8 F1 LTC2208 R 24nH 33pF R 30 0.1μF S2 S4 15Ω 10Ω –IN –OUT OUTPUT IP3 (dBm) AIN– V 20 V CM R2 OCM CF3 27.4Ω COILCRAFT V– 33pF LTC2208 10 0603CS 130Msps 1.25V 16-Bit ADC 64008 TA01a 0 C5 R3 0 50 100 150 200 250 300 0.1μF 100Ω FREQUENCY (MHz) 64008 TA01b 64008f 1
