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LTC6605-14 Dataheets PDF



Part Number LTC6605-14
Manufacturers Linear Technology
Logo Linear Technology
Description Dual Matched 14MHz Filter
Datasheet LTC6605-14 DatasheetLTC6605-14 Datasheet (PDF)

FEATURES n LTC6605-14 Dual Matched 14MHz Filter with Low Noise, Low Distortion Differential Amplifier DESCRIPTION www.DataSheet4U.com n n n n n n n Two Matched 14MHz 2nd Order Lowpass Filters with Differential Amplifiers Gain Match: ±0.25dB Max, Passband Phase Match: ±1.1° Max, Passband Single-Ended or Differential Inputs < –84dBc Distortion in Passband 2.1nV/√Hz Op Amp Noise Density Pin-Selectable Gain (0dB/6dB/9.5dB) Pin-Selectable Power Consumption (0.35mA/ 16.2mA/33.1mA) Rail-to-Rail Outpu.

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FEATURES n LTC6605-14 Dual Matched 14MHz Filter with Low Noise, Low Distortion Differential Amplifier DESCRIPTION www.DataSheet4U.com n n n n n n n Two Matched 14MHz 2nd Order Lowpass Filters with Differential Amplifiers Gain Match: ±0.25dB Max, Passband Phase Match: ±1.1° Max, Passband Single-Ended or Differential Inputs < –84dBc Distortion in Passband 2.1nV/√Hz Op Amp Noise Density Pin-Selectable Gain (0dB/6dB/9.5dB) Pin-Selectable Power Consumption (0.35mA/ 16.2mA/33.1mA) Rail-to-Rail Output Swing Adjustable Output Common Mode Voltage Control Buffered, Low Impedance Outputs 2.7V to 5.25V Supply Voltage Small 22-Pin 6mm × 3mm × 0.75mm DFN Package The LTC®6605-14 contains two independent, fully differential amplifiers configured as matched 2nd order 14MHz lowpass filters. The f–3dB of the filters is adjustable in the range of 12.4MHz to 20MHz and 25MHz. The internal op amps are fully differential, feature very low noise and distortion, and are compatible with 16-bit dynamic range systems. The inputs can accept singleended or differential signals. An input pin is provided for each amplifier to set the common mode level of the differential outputs. Internal laser-trimmed resistors and capacitors determine a precise, very well matched (in gain and phase) 14MHz 2nd order filter response. A single optional external resistor per channel can tailor the frequency response for each amplifier. Three-state BIAS pins determine each amplifier’s power consumption, allowing a choice between shutdown, medium power or full power. The LTC6605-14 is available in a compact 6mm × 3mm 22-pin leadless DFN package and operates over a –40°C to 85°C temperature range. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. APPLICATIONS n n n n n Broadband Wireless ADC Driver/Filter Antialiasing Filter Single-Ended to Differential Conversion DAC Smoothing Filter Zero-IF Direct Conversion Receivers TYPICAL APPLICATION Dual, Matched 12.4MHz Lowpass Filter + VINA 3V 1 2 3 4 22 Channel to Channel Phase Matching 160 354 TYPICAL UNITS TA = 25° fIN = 14MHz + – LTC6605-14 21 20 19 18 17 16 0.1μF 0.1μF 3V – + NUMBER OF UNITS VOUTA 140 120 100 80 60 40 20 0 – + VINB 3V 5 6 7 8 9 10 + – 15 0.1μF 14 13 12 660514 TA01 3V – VOUTB 0.1μF + – 11 –1.0 –0.6 0.6 –0.2 0 0.2 PHASE MATCH (DEG) 1.0 66057 TA01b 660514f 1 LTC6605-14 ABSOLUTE MAXIMUM RATINGS (Note 1) www.DataSheet4U.com PIN CONFIGURATION TOP VIEW +IN2 A +IN1 A BIAS A –IN1 A –IN2 A V– +IN2 B +IN1 B BIAS B 1 2 3 4 5 6 7 8 9 23 22 –OUT A 21 V+ A 20 V– 19 VOCMA 18 +OUT A 17 V– 16 –OUT B 15 V+ B 14 V– 13 VOCMB 12 +OUT B Total Supply Voltage (V+ to V–) ................................5.5V Input Current (Note 2)..........................................±10mA Output Short-Circuit Duration (Note 3) ............ Indefinite Operating Temperature Range (Note 4).... –40°C to 85°C Specified Temperature Range (Note 5) .... –40°C to 85°C Junction Temperature ........................................... 150°C Storage Temperature Range................... –65°C to 150°C –IN1 B 10 –IN2 B 11 DJC PACKAGE 22-LEAD (6mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 46.5°C/W , MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 23) IS V – ORDER INFORMATION LEAD FREE FINISH LTC6605CDJC-14#PBF LTC6605IDJC-14#PBF TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION 22-Lead (6mm × 3mm) Plastic DFN 22-Lead (6mm × 3mm) Plastic DFN TEMPERATURE RANGE 0°C to 70°C –40°C to 85°C LTC6605CDJC-14#TRPBF 660514 LTC6605IDJC-14#TRPBF 660514 Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ DC ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V – = 0V, VINCM = VOCM = mid-supply, BIAS tied to V +, RL = Open, RBAL = 10k. The filter is configured for a gain of 1, unless otherwise noted. VS is defined as (V + – V – ). VOUTCM is defined as (V+OUT + V–OUT )/2. VINCM is defined as (VINP + VINM)/2. VOUTDIFF is defined as (V+OUT – V–OUT ). VINDIFF is defined as (VINP – VINM). See Figure 1. PARAMETER Differential Offset Voltage (at Op Amp Inputs) (Note 6) Differential Offset Voltage Drift (at Op Amp Inputs) Input Bias Current (at Op Amp Inputs) (Note 7) Input Offset Current (at Op Amp Inputs) (Note 7) CONDITIONS VS = 2.7V to 5V BIAS = V+ BIAS = Floating BIAS = V+ BIAS = Floating l l l l l SYMBOL VOS ΔVOS /ΔT IB IOS MIN TYP ±0.25 ±1 ±1 MAX ±1 UNITS mV μV/°C μV/°C –60 –30 –25 –12.5 ±1 0 0 μA μA μA 660514f 2 www.DataSheet4U.com LTC6605-14 DC ELECTRICAL CHARACTERISTICS The l den.


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