Datasheet LT6411 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 650MHz Differential ADC Driver/Dual Selectable Gain Amplifier |
| Pages / Page | 16 / 1 — FEATURES. DESCRIPTION. 650MHz –3dB Small-Signal Bandwidth. 600MHz –3dB … |
| File Format / Size | PDF / 371 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. 650MHz –3dB Small-Signal Bandwidth. 600MHz –3dB Large-Signal Bandwidth. High Slew Rate: 3300V/µs
Model Line for this Datasheet
Text Version of Document
LT6411 650MHz Differential ADC Driver/Dual Selectable Gain Amplifi er
FEATURES DESCRIPTION
■
650MHz –3dB Small-Signal Bandwidth
The LT®6411 is a dual amplifi er with individually selectable ■
600MHz –3dB Large-Signal Bandwidth
gains of +1, +2 and –1. The amplifi ers have excellent dis- ■
High Slew Rate: 3300V/µs
tortion performance for driving ADCs as well as excellent ■
Easily Confi gured for Single-Ended to Differential
bandwidth and slew rate for video, data transmission and
Conversion
other high speed applications. Single-ended to differential ■ 200MHz ±0.1dB Bandwidth conversion with a system gain of 2 is particularly straight- ■ User Selectable Gain of +1, +2 and –1 forward by confi guring one amplifi er with a gain of +1 ■ No External Resistors Required and the other amplifi er with a gain of –1. The LT6411 can ■ 46.5dBm Equivalent OIP3 at 30MHz When Driving an be used on split supplies as large as ±6V and on a single ADC supply as low as 4.5V. ■ IM3 with 2VP-P Composite, Differential Output: Each amplifi er draws only 8mA of quiescent current when –87dBc at 30MHz, –83dBc at 70MHz enabled. When disabled, the output pins become high ■ –77dB SFDR at 30MHz, 2VP-P Differential Output impedance and each amplifi er draws less than 350µA. ■ 6ns 0.1% Settling Time for 2V Step ■ Low Supply Current: 8mA per Ampifi er The LT6411 is manufactured on Linear Technology’s ■ Differential Gain of 0.02%, Differential Phase of 0.01° proprietary, low voltage, complimentary, bipolar process ■ 50dB Channel Separation at 100MHz and is available in the ultra-compact, 3mm × 3mm, 16pin ■ Wide Supply Range: ±2.25V (4.5V) to ±6.3V (12.6V) QFN package. ■ 3mm × 3mm 16-Pin QFN Package , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIONS
■ Differential ADC Driver ■ Single-Ended to Differential Conversion ■ Differential Video Line Driver
TYPICAL APPLICATION 30MHz 2-Tone 32768 Point FFT, LT6411 Differential ADC Driver Driving an LTC
®
2249 14-Bit ADC
5V 0 –10 32768 POINT FFT TONE 1 AT 29.5MHz, –7dBFS VCC –20 TONE 2 AT 30.5MHz, –7dBFS –30 LT6411 IM3 = –87dBc –40 + 24Ω –50 1.9VDC – –60 370Ω 370Ω A – –70 IN LTC2249 –80 30MHz 14-BIT ADC INPUT 370Ω 370Ω –90 80Msps AMPLITUDE (dBFS) A + –100 IN –110 1.9V 24Ω DC – –120 6411 TA01a + –130 –140 VEE 0 5 10 15 20 25 30 35 40 DGND FREQUENCY (MHz) 6411 TA01b EN 6411f 1
FEATURES DESCRIPTION
■
650MHz –3dB Small-Signal Bandwidth
The LT®6411 is a dual amplifi er with individually selectable ■
600MHz –3dB Large-Signal Bandwidth
gains of +1, +2 and –1. The amplifi ers have excellent dis- ■
High Slew Rate: 3300V/µs
tortion performance for driving ADCs as well as excellent ■
Easily Confi gured for Single-Ended to Differential
bandwidth and slew rate for video, data transmission and
Conversion
other high speed applications. Single-ended to differential ■ 200MHz ±0.1dB Bandwidth conversion with a system gain of 2 is particularly straight- ■ User Selectable Gain of +1, +2 and –1 forward by confi guring one amplifi er with a gain of +1 ■ No External Resistors Required and the other amplifi er with a gain of –1. The LT6411 can ■ 46.5dBm Equivalent OIP3 at 30MHz When Driving an be used on split supplies as large as ±6V and on a single ADC supply as low as 4.5V. ■ IM3 with 2VP-P Composite, Differential Output: Each amplifi er draws only 8mA of quiescent current when –87dBc at 30MHz, –83dBc at 70MHz enabled. When disabled, the output pins become high ■ –77dB SFDR at 30MHz, 2VP-P Differential Output impedance and each amplifi er draws less than 350µA. ■ 6ns 0.1% Settling Time for 2V Step ■ Low Supply Current: 8mA per Ampifi er The LT6411 is manufactured on Linear Technology’s ■ Differential Gain of 0.02%, Differential Phase of 0.01° proprietary, low voltage, complimentary, bipolar process ■ 50dB Channel Separation at 100MHz and is available in the ultra-compact, 3mm × 3mm, 16pin ■ Wide Supply Range: ±2.25V (4.5V) to ±6.3V (12.6V) QFN package. ■ 3mm × 3mm 16-Pin QFN Package , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIONS
■ Differential ADC Driver ■ Single-Ended to Differential Conversion ■ Differential Video Line Driver
TYPICAL APPLICATION 30MHz 2-Tone 32768 Point FFT, LT6411 Differential ADC Driver Driving an LTC
®
2249 14-Bit ADC
5V 0 –10 32768 POINT FFT TONE 1 AT 29.5MHz, –7dBFS VCC –20 TONE 2 AT 30.5MHz, –7dBFS –30 LT6411 IM3 = –87dBc –40 + 24Ω –50 1.9VDC – –60 370Ω 370Ω A – –70 IN LTC2249 –80 30MHz 14-BIT ADC INPUT 370Ω 370Ω –90 80Msps AMPLITUDE (dBFS) A + –100 IN –110 1.9V 24Ω DC – –120 6411 TA01a + –130 –140 VEE 0 5 10 15 20 25 30 35 40 DGND FREQUENCY (MHz) 6411 TA01b EN 6411f 1
