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LT1568 Datasheet(PDF) 5 Page - Linear Technology |
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LT1568 Datasheet(HTML) 5 Page - Linear Technology |
5 / 16 page LT1568 5 1568f SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Filter Gain, fC = 10MHz, Test Frequency = 1MHz (0.1 • fC) q –0.3 0.15 0.5 dB VS = 5V, RFIL = 128Ω Test Frequency = 7.5MHz (0.75 • fC) q –1.2 –0.50 0.0 dB (Measured with Respect to DC Gain) Test Frequency = 10MHz (1 • fC) q –3.1 –2.30 –1.5 dB Test Frequency = 20MHz (2 • fC) q –12.2 –11.2 –10.2 dB Test Frequency = 40MHz (4 • fC) –19.1 dB Filter Gain Mismatch fC = 1MHz, fIN = fC q –0.4 ±0.02 0.4 dB ( VOUTA – VOUTB)fC = 10MHz, fIN = fC q –0.5 ±0.02 0.5 dB Wideband Output Noise fC = 1MHz, RFIL = 1.28k, BW = 2MHz 22 µVRMS fC = 10MHz, RFIL = 128Ω, BW = 20MHz 60 µVRMS THD Total Harmonic Distortion fC = 1MHz, RFIL = 1.28k, – 84 dB fIN = 200kHz, VIN = 1VP-P fC = 10MHz, RFIL = 128Ω,– 75 dB fIN = 2MHz, VIN = 1VP-P Specifications are for the OUTA or OUTB of a single 2nd order section (A or B) with respect to VGND = VGNDA = VGNDB, gain = 1, RFIL = R11 = R21 = R31 = R12 = R22 = R32, (see Block Diagram) The q denotes the specifications which apply over the full operating temperature range, otherwise specifications and typcial values are at TA = 25°C. VS = single 5V, EN pin to logic “low,” RL = 400Ω connected to midsupply, unless otherwise noted. Specifications are for the differential output (OUTA – OUTA or OUTB – OUTB) of a single 2nd order section (A or B), gain = –2, RFIL = R11 = R21 = R31 = R12 = R22 = R32. All voltages are with respect to VGND = VGNDA = VGNDB. The q denotes the specifications which apply over the full operating temperature range, otherwise specifications and typical values are at TA = 25°C. VS = single 5V, EN pin to logic “low,” RLDIFF = 800Ω connected at midsupply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ADC DC Gain q –2 V/V VOS(OUT) DC Offset Voltage VS = 3V, fC = 1MHz, RFIL = 1.28k q –4 6 16 mV (OUTA – OUTA) or (OUTB – OUTB) VS = 5V, fC = 1MHz, RFIL = 1.28k q –12 2 15 mV VS = ±5V, fC = 1MHz, RFIL = 1.28k q –20 –5 10 mV ∆VOS(OUT) DC Offset Voltage Mismatch VS = 3V, fC = 1MHz, RFIL = 1.28k q –8 2 8 mV (OUTA – OUTA) – (OUTB – OUTB) VS = 5V, fC = 1MHz, RFIL = 1.28k q –12 –2 12 mV VS = ±5V, fC = 1MHz, RFIL = 1.28k q –15 2 15 mV Transfer Function Characteristics for Each Section (A or B) to Differential Output (OUTA – OUTA or OUTB – OUTB) fC Cutoff Frequency Range (Note 7) VS = 3V, VS = 5V, VS = ±5V q 0.2 10 MHz TC Cutoff Frequency Temperature Coefficient q ±1 ppm/ °C Filter Gain, fC = 1MHz, Test Frequency = 300kHz (0.3 • fC) q –0.05 0.10 0.25 dB VS = 5V, RFIL = 1.28k (Note 8) Test Frequency = 750kHz (0.75 • fC) q –1.40 –1.10 –0.80 dB (Measured with Respect to DC Gain) Test Frequency = 1MHz (1 • fC) q –3.60 –3.20 –2.70 dB Test Frequency = 2MHz (2 • fC) q –13.7 –13.1 –12.5 dB Test Frequency = 4MHz (4 • fC) –25.0 dB Filter Gain, fC = 10MHz, Test Frequency = 1MHz (0.1 • fC) q –0.20 0.1 0.30 dB VS = 5V, RFL = 128Ω (Note 8) Test Frequency = 7.5MHz (0.75 • fC) q –1.30 –0.8 –0.20 dB (Measured with Respect to DC Gain) Test Frequency = 10MHz (1 • fC) q –3.30 –2.6 –1.90 dB Test Frequency = 20MHz (2 • fC) q –13.1 –12.1 –11.1 dB Test Frequency = 40MHz (4 • fC) –24.3 dB FILTER ELECTRICAL CHARACTERISTICS |
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