LTC1066-1 Datasheet | Linear Technology

14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter Features - DC Gain Linearity: 14 Bits - Maximum DC Offset: ±1.5m V - DC Offset Temp Co: 7µV/°C - Device Fully Tested at f CUTOFF = 80k Hz - Maximum Cutoff Frequency: 120k Hz (VS = ±8V) - Drives 1kΩ Load with 0.02% THD or Better - Signal-to-Noise Ratio: 90d B - Input Impedance: 500MΩ - Selectable Elliptic or Linear Phase Response - Operates from Single 5V up to ±8V Power Supplies - Available in an 18-Pin SO Wide Package U APPLICATIO S - Instrumentation - Data Acquisition Systems - Anti-Aliasing Filters - Smoothing Filters - Audio Signal Processing , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. DESCRIPTIO The LTC®1066-1 is an 8th order elliptic lowpass filter which simultaneously provides clock-tunability and DC accuracy. The unique and proprietary architecture of the filter allows 14 bits of DC gain linearity and a maximum of 1.5m V DC offset. An external RC is required for DC accurate operation. With ±7.5V supplies, a 20k resistor and a 1µF capacitor, the cutoff frequency can be tuned from 800Hz to 100k Hz. A clock-tunable 10Hz to 100k Hz operation can also be achieved (see Typical Application section). The filter does not require any external active ponents such as input/output buffers. The input/output impedance is 500MΩ/0.1Ω and the output of the filter can source or sink 40m A. When pin 8 is connected to V +, the clock-tocutoff frequency ratio is 50:1 and the input signal is sampled twice per clock cycle to lower the risk of aliasing. For frequencies up to 0.75f CUTOFF, the passband ripple is ±0.15d B. The gain at f CUTOFF is - 1d B and the filter’s stopband attenuation is 80d B at 2.3f CUTOFF. Linear phase operation is also available with a clock-to-cutoff frequency ratio of 100:1 when pin 8 is connected to ground. The LTC1066-1 is available in an 18-pin SO Wide package. TYPICAL...