LT6604-2.5 Series

Dual Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter

Catalog

Dual Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter

Part	Package / Case	Applications	Type	Mounting Type	Supplier Device Package	Utilized IC / Part	Output Type	Amplifier Type	Contents	Channels per IC	Voltage - Supply, Single/Dual (±) [Max]	Voltage - Supply, Single/Dual (±) [Min]	Current - Supply (Main IC)
Analog Devices LT6604IUFF-5#PBF	34-WFQFN Exposed Pad	Driver	Differential	Surface Mount	34-QFN (4x7)
Analog Devices DC1418A-C						LT6604-10	Differential	Differential	Board(s)	2 - Dual	-1.5 V 5.5 V 11 V	-5.5 V 1.5 V 3 V	28 mA
Analog Devices LT6604IUFF-2.5#TRPBF	34-WFQFN Exposed Pad	Driver	Differential	Surface Mount	34-QFN (4x7)
Analog Devices LT6604CUFF-2.5#TRPBF	34-WFQFN Exposed Pad	Driver	Differential	Surface Mount	34-QFN (4x7)
Analog Devices LT6604IUFF-5#PBF	34-WFQFN Exposed Pad	Driver	Differential	Surface Mount	34-QFN (4x7)
Analog Devices LT6604CUFF-10#TRPBF	34-WFQFN Exposed Pad	Driver	Differential	Surface Mount	34-QFN (4x7)

Catalog

Dual Very Low Noise, Differential Amplifier and 10MHz Lowpass Filter

Key Features

• Dual Differential Ampliﬁer with 10MHz Lowpass Filters4th Order FiltersApproximates Chebyshev ResponseGuaranteed Phase and Gain MatchingResistor-Programmable Differential Gain

• 4th Order Filters

• Approximates Chebyshev Response

• Guaranteed Phase and Gain Matching

• Resistor-Programmable Differential Gain

• 82dB Signal-to-Noise (3V Supply, 2VP-POutput)

• Low Distortion, 2VP-P, 800Ω Load1MHz: 88dBc 2nd, 97dBc 3rd5MHz: 74dBc 2nd, 77dBc 3rd

• 1MHz: 88dBc 2nd, 97dBc 3rd

• 5MHz: 74dBc 2nd, 77dBc 3rd

• Speciﬁed for Operation with 3V, 5V and ±5V Supplies

• Fully Differential Inputs and Outputs

• Adjustable Output Common Mode Voltage

• Small 4mm × 7mm × 0.75mm QFN Package

Description

The LT6604-2.5 consists of two matched, fully differential amplifiers, each with a 4th order, 2.5MHz lowpass ﬁlter. The ﬁxed frequency lowpass ﬁlter approximates a Chebyshev response. By integrating a ﬁlter and a differential amplifier, distortion and noise are made exceptionally low. At unity gain, the measured in-band signal-to-noise ratio is an impressive 86dB. At higher gains, the input referred noise decreases, allowing the part to process smaller input differential signals without significantly degrading the signal-to-noise ratio.Gain and phase are well matched between the two channels. Gain for each channel is independently programmed using two external resistors. The LT6604-2.5 enables level shifting by providing an adjustable output common mode voltage, making it ideal for directly interfacing to ADCs. The LT6604-2.5 is fully specified for 3V operation. The differential design enables outstanding performance up to a 4VP-Psignal level for a single 3V supply.See the back page of this datasheet for a complete list of related single and dual differential amplifiers with integrated 2.5MHz to 20MHz lowpass ﬁlters.ApplicationsDual Differential ADC Driver and FilterSingle-Ended to Differential ConverterMatched, Dual, Differential Gain or Filter StageCommon Mode Translation of Differential SignalsHigh Speed ADC Antialiasing and DAC Smoothing in Wireless Infrastructure or Networking ApplicationsHigh Speed Test and Measurement EquipmentMedical Imaging