Datasheet LT6604-15 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Dual Very Low Noise, Differential Amplifier and 15MHz Lowpass Filter |
| Pages / Page | 16 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Channel to … |
| File Format / Size | PDF / 213 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Channel to Channel Gain Matching
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LT6604-15 Dual Very Low Noise, Differential Amplifi er and 15MHz Lowpass Filter
FEATURES DESCRIPTION
n Dual Differential Amplifi er with 15MHz Lowpass The LT®6604-15 consists of two matched, fully differential Filters amplifi ers, each with a 4th order, 15MHz lowpass fi lter. The 4th Order Filters fi xed frequency lowpass fi lter approximates a Chebyshev Approximates Chebyshev Response response. By integrating a fi lter and a differential ampli- Guaranteed Phase and Gain Matching fi er, distortion and noise are made exceptionally low. At Resistor-Programmable Differential Gain unity gain, the measured in band signal-to-noise ratio is n 76dB Signal-to-Noise (3V Supply, 2VP-P Output) an impressive 76dB. At higher gains, the input referred n Low Distortion, 2VP-P, 800Ω Load, VS = 3V noise decreases, allowing the part to process smaller 1MHz: 86dBc 2nd, 90dBc 3rd input differential signals without signifi cantly degrading 10MHz: 63dBc 2nd, 69dBc 3rd the signal-to-noise ratio. n Specifi ed for Operation with 3V, 5V and ±5V Supplies Gain and phase are highly matched between the two chan- n Fully Differential Inputs and Outputs nels. Gain for each channel is independently programmed n Adjustable Output Common Mode Voltage using two external resistors. The LT6604-15 enables level n Small 4mm × 7mm × 0.75mm QFN Package shifting by providing an adjustable output common mode voltage, making it ideal for directly interfacing to ADCs.
APPLICATIONS
The LT6604-15 is fully specifi ed for 3V operation. The n differential design enables outstanding performance at Dual Differential ADC Driver Plus Filter n a 2V Single-Ended to Differential Converter P-P signal level for a single 3V supply. See the back n page of this datasheet for a complete list of related single Matched, Dual, Differential Filter Stage n and dual differential amplifi ers with integrated 2.5MHz to Common Mode Translation of Differential Signals n 20MHz lowpass fi lters. High Speed ADC Antialiasing and DAC Smoothing in Wireless Infrastructure or Networking Applications L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n High Speed Test and Measurement Equipment All other trademarks are the property of their respective owners. n Medical Imaging
TYPICAL APPLICATION
3V
Channel to Channel Gain Matching
16 50 TYPICAL UNITS LT6604-15 LTC22xx DUAL ADC V+A 3V TA = 25°C 536Ω 14 GAIN = 1 0.01μF + +INA + –OUTA 50Ω f V IN = 15MHz MIDA – + 12 V 18pF AIN DOUT OCMA +OUTA 50Ω 10 536Ω –INA + – – – 8 V+ V B + 3V 536Ω +INB 6 0.01μF + + –OUTB 50Ω VMIDB – + 4 VOCMB 18pF AIN DOUT +OUTB 50Ω 2 536Ω –INB + – – – 0 V– –0.25–0.2–0.15 –0.1–0.05 0 0.05 0.1 0.15 0.2 0.25 660415 TA01 GAIN MATCH (dB) 660415 TA01b 660415fb 1
FEATURES DESCRIPTION
n Dual Differential Amplifi er with 15MHz Lowpass The LT®6604-15 consists of two matched, fully differential Filters amplifi ers, each with a 4th order, 15MHz lowpass fi lter. The 4th Order Filters fi xed frequency lowpass fi lter approximates a Chebyshev Approximates Chebyshev Response response. By integrating a fi lter and a differential ampli- Guaranteed Phase and Gain Matching fi er, distortion and noise are made exceptionally low. At Resistor-Programmable Differential Gain unity gain, the measured in band signal-to-noise ratio is n 76dB Signal-to-Noise (3V Supply, 2VP-P Output) an impressive 76dB. At higher gains, the input referred n Low Distortion, 2VP-P, 800Ω Load, VS = 3V noise decreases, allowing the part to process smaller 1MHz: 86dBc 2nd, 90dBc 3rd input differential signals without signifi cantly degrading 10MHz: 63dBc 2nd, 69dBc 3rd the signal-to-noise ratio. n Specifi ed for Operation with 3V, 5V and ±5V Supplies Gain and phase are highly matched between the two chan- n Fully Differential Inputs and Outputs nels. Gain for each channel is independently programmed n Adjustable Output Common Mode Voltage using two external resistors. The LT6604-15 enables level n Small 4mm × 7mm × 0.75mm QFN Package shifting by providing an adjustable output common mode voltage, making it ideal for directly interfacing to ADCs.
APPLICATIONS
The LT6604-15 is fully specifi ed for 3V operation. The n differential design enables outstanding performance at Dual Differential ADC Driver Plus Filter n a 2V Single-Ended to Differential Converter P-P signal level for a single 3V supply. See the back n page of this datasheet for a complete list of related single Matched, Dual, Differential Filter Stage n and dual differential amplifi ers with integrated 2.5MHz to Common Mode Translation of Differential Signals n 20MHz lowpass fi lters. High Speed ADC Antialiasing and DAC Smoothing in Wireless Infrastructure or Networking Applications L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n High Speed Test and Measurement Equipment All other trademarks are the property of their respective owners. n Medical Imaging
TYPICAL APPLICATION
3V
Channel to Channel Gain Matching
16 50 TYPICAL UNITS LT6604-15 LTC22xx DUAL ADC V+A 3V TA = 25°C 536Ω 14 GAIN = 1 0.01μF + +INA + –OUTA 50Ω f V IN = 15MHz MIDA – + 12 V 18pF AIN DOUT OCMA +OUTA 50Ω 10 536Ω –INA + – – – 8 V+ V B + 3V 536Ω +INB 6 0.01μF + + –OUTB 50Ω VMIDB – + 4 VOCMB 18pF AIN DOUT +OUTB 50Ω 2 536Ω –INB + – – – 0 V– –0.25–0.2–0.15 –0.1–0.05 0 0.05 0.1 0.15 0.2 0.25 660415 TA01 GAIN MATCH (dB) 660415 TA01b 660415fb 1
