LT6604-15

Features:

` Dual Differential Amplifi er with 15MHz Lowpass Filters
           4th Order Filters
           Approximates Chebyshev Response
           Guaranteed Phase and Gain Matching
           Resistor-Programmable Differential Gain
` 76dB Signal-to-Noise (3V Supply, 2V_P-P Output)
` Low Distortion, 2V<sub>P-P</sub>, 800 Load, V<sub>S</sub> = 3V
          1MHz: 86dBc 2nd, 90dBc 3rd
          10MHz: 63dBc 2nd, 69dBc 3rd
` Specifi ed 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

Application

· Dual Differential ADC Driver Plus Filter
· Single-Ended to Differential Converter
· Matched, Dual, Differential Filter Stage
· Common Mode Translation of Differential Signals
· High Speed ADC Antialiasing and DAC Smoothing in Wireless Infrastructure or Networking Applications
· High Speed Test and Measurement Equipment
· Medical Imaging

Pinout




Specifications

`Total Supply Voltage.....................................................11V
`Operating Temperature Range (Note 6)..........................40 to 85
`Specifi ed Temperature Range (Note 7) ..........................40 to 85
`Junction Temperature ................................................ 150
`Storage Temperature Range ....................................65 to 150
`Input Voltage
+IN, IN, V_OCM, V_MID (Note 8) ............................................±VS
`Input Current
+IN, IN, V<sub>OCM</sub>, V<sub>MID</sub> (Note 8) .........................................±10mA
`Lead Temperature (Soldering, 10 sec) ................................. 300


Description

The LT^®6604-15 consists of two matched, fully differential amplifi ers, each with a 4th order, 15MHz lowpass filter. The fixed frequency lowpass fi lter approximates a Chebyshev
response. By integrating a fi lter 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 76dB. At higher gains, the input referred noise decreases, allowing the part to process smaller input differential signals without signifi cantly degrading the signal-to-noise ratio.

Gain and phase are highly matched between the two channels. Gain for each channel is independently programmed using two external resistors. The LT6604-15 enables level shifting by providing an adjustable output common mode voltage, making it ideal for directly interfacing to ADCs.

The LT6604-15 is fully specifi ed for 3V operation. The differential design enables outstanding performance at a 2V_P-P signal level for a single 3V supply. See the back page of this datasheet for a complete list of related single and duaAl differential amplifi ers with integrated 2.5MHz to 20MHz lowpass fi lters.