Low Power, Low Distortion, 5MHz to 27MHz, Pin Configurable Filter/ADC Driver

The LTC6601-2 is a low power, low distortion, very easy-to-use fully differential 2nd order active broadband RC filter and driver. On-chip resistors, capacitors, and amplifier bandwidth are trimmed to provide consistent and repeatable filter characteristics.

The filter characteristics are pin-strap configurable. Cutoff frequencies range from 5MHz to 27MHz. Gain is pin-strap programmable between –17dB and +17dB.

A three-state BIAS pin is provided to adjust amplifier power consumption. Select between low power (50% power reduction), high performance and standby modes with the BIAS pin.

The LTC6601 family comes in two options which trade off distortion and noise. The LTC6601-2 offers the lowest distortion at high frequencies. The LTC6601-1 is configured for lowest noise. Both are available in pin-compatible packages.

The LTC6601-2 is available in a compact 4mm × 4mm 20-pin leadless QFN package.

Applications

* Differential A/D Converter Driver

* Antialiasing/Reconstruction Filter

* Single-Ended to Differential Conversion/Amplification

* Low Voltage, Low Noise, Differential Signal Processing

* Common Mode Voltage Translation

* Portable Instrumentation

* Pin Configurable Gain and Filter Response Up to 27MHz

* Low Power: 16mA at 3V

* Low Distortion (2VP-P)

* 1MHz: –96dBc 2nd, –112dBc 3rd

* 10MHz: –65dBc 2nd, –78dBc 3rd

* Few External Components Required

* Resistors Trimmed to 0.5% Accuracy Typical

* Capacitors Trimmed to 0.5% Accuracy Typical

* Adjustable Output Common Mode Voltage

* Rail-to-Rail Output Swing

* Power Configurability and Low Power Shutdown

* Tiny 0.75mm 20-Lead (4mm × 4mm) QFN Package