LTC2280 Linear Technology, LTC2280 Datasheet
LTC2280
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LTC2280 Summary of contents
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... ADC CORE – DESCRIPTIO The LTC A/D converter designed for digitizing high frequency, wide dynamic range signals. The LTC2280 is perfect for demanding imaging and communications applications with AC performance that includes 61.6dB SNR and 85dB SFDR for signals at the Nyquist frequency. Range DC specs include ±0.1LSB INL (typ), ±0.1LSB DNL (typ) and ± ...
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... Analog Input Voltage (Note 3) ..... –0. Digital Input Voltage .................... –0. Digital Output Voltage ................ –0.3V to (OV Power Dissipation ............................................ 1500mW Operating Temperature Range LTC2280C ............................................... 0°C to 70°C LTC2280I .............................................–40°C to 85°C Storage Temperature Range ..................–65°C to 125° VERTER CHARACTERISTICS ...
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... Input 30MHz Input 70MHz Input 140MHz Input 5MHz Input 30MHz Input 70MHz Input 140MHz Input 5MHz Input 30MHz Input 70MHz Input 140MHz Input f = 40MHz, 41MHz 100MHz IN LTC2280 MIN TYP ±0.5V to ±1V ● ● 1 1.5 ● 0.5 1.5 ● –1 DD ● –3 ● – ...
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... LTC2280 TER AL REFERE CE CHARACTERISTICS PARAMETER V Output Voltage CM www.datasheet4u.com V Output Tempco CM V Line Regulation CM V Output Resistance DIGITAL I PUTS A D DIGITAL OUTPUTS full operating temperature range, otherwise specifications are at T SYMBOL PARAMETER LOGIC INPUTS (CLK, OE, SHDN, MUX) V High Level Input Voltage ...
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... Note 7: Guaranteed by design, not subject to test. , they Note drive. The supply current and power dissipation are the sum total for both without latchup. channels with both channels active. DD with differential Note 9: Recommended operating conditions. P-P LTC2280 MIN TYP MAX ● 2.85 3 ● 0.5 3 ● 180 ● ...
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... LTC2280 W TYPICAL PERFOR A CE CHARACTERISTICS Crosstalk vs Input Frequency –100 www.datasheet4u.com –105 –110 –115 –120 –125 –130 INPUT FREQUENCY (MHz) 8192 Point FFT 5MHz, –1dB Range, 105Msps 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 ...
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... INPUT LEVEL (dBFS) 2280 G13 = 1. 100 120 2280 G16 LTC2280 SNR and SFDR vs Sample Rate, 2V Range 5MHz, –1dB IN 90 SFDR 80 70 SNR 60 50 300 350 SAMPLE RATE (Msps) 2280 G11 I ...
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... LTC2280 CTIO (Pin 1): Channel A Positive Differential Analog INA Input. www.datasheet4u.com – A (Pin 2): Channel A Negative Differential Analog INA Input. REFHA (Pins 3, 4): Channel A High Reference. Short together and bypass to Pins 5, 6 with a 0.1µF ceramic chip capacitor as close to the pin as possible. Also bypass to Pins 5, 6 with an additional 2.2µ ...
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... DIFF CLOCK/DUTY CYCLE REF AMP CONTROL REFH REFL 0.1µF CLK 2.2µF 1µF 1µF LTC2280 selects 2’s complement output format DD . CMB selects the internal reference CMA selects the internal reference DD . ±1V is the largest valid input range. SENSEA FIFTH PIPELINED SIXTH PIPELINED ADC STAGE ...
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... LTC2280 DIAGRA S www.datasheet4u.com ANALOG N INPUT t H CLK D0-D9, OF ANALOG INPUT A ANALOG INPUT B CLKA = CLKB = MUX D0A-D9A, OFA D0B-D9B, OFB 10 Dual Digital Output Bus Timing (Only One Channel is Shown – – – 3 ...
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... CONVERTER OPERATION As shown in Figure 1, the LTC2280 is a dual CMOS pipelined multistep converter. The converter has six pipelined ADC stages; a sampled analog input will result in a digitized value five cycles later (see the Timing Diagram section) ...
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... SAMPLE/HOLD OPERATION AND INPUT DRIVE Sample/Hold Operation Figure 2 shows an equivalent circuit for the LTC2280 CMOS differential sample-and-hold. The analog inputs are connected to the sampling capacitors (C NMOS transistors. The capacitors shown attached to each input (C tance associated with each input ...
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... Poor matching will result in higher even order harmonics, especially the second. Input Drive Circuits Figure 3 shows the LTC2280 being driven transformer with a center tapped secondary. The second- ary center tap is DC biased with V signal at its optimum DC level. Terminating on the trans- ...
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... V CM 2.2µF 0.1µF 6.8nH + A IN 0.1µF 25Ω T1 0.1µF 25Ω 6.8nH – MA/COM, ETC 1-1-13 RESISTORS, CAPACITORS, INDUCTORS ARE 0402 PACKAGE SIZE Figure 8. Recommended Front End Circuit for Input Frequencies Above 300MHz LTC2280 2280 F06 LTC2280 2280 F07 LTC2280 2280 F08 2280fa ...
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... U U APPLICATIO S I FOR ATIO Reference Operation Figure 9 shows the LTC2280 reference circuitry consisting www.datasheet4u.com of a 1.5V bandgap reference, a difference amplifier and switching and control circuit. The internal voltage refer- ence can be configured for two pin selectable input ranges of 2V (±1V differential (±0.5V differential). Tying the SENSE pin to V selects the 2V range ...
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... NC7SVU04 Figure 11. Sinusoidal Single-Ended CLK Drive The noise performance of the LTC2280 can depend on the clock signal quality as much as on the analog input. Any noise present on the clock signal will result in additional aperture jitter that will be RMS summed with the inherent ADC aperture jitter ...
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... As with all high speed/high resolution converters, the or DD digital output loading can affect the performance. The digital outputs of the LTC2280 should drive a minimal capacitive load to avoid possible interaction between the digital outputs and sensitive input circuitry. LTC2280 DATA PREDRIVER ...
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... OE pin. Grounding and Bypassing The LTC2280 requires a printed circuit board with a clean, unbroken ground plane. A multilayer board with an inter- nal ground plane is recommended. Layout for the printed circuit board should ensure that digital and analog signal lines are separated as much as possible ...
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... Heat Transfer Most of the heat generated by the LTC2280 is transferred from the die through the bottom-side exposed pad and package leads onto the printed circuit board. For good electrical and thermal performance, the exposed pad should be soldered to a large grounded pad on the PC board ...
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... LTC2280 U U APPLICATIO S I FOR ATIO www.datasheet4u.com 2280fa ...
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... U U APPLICATIO S I FOR ATIO www.datasheet4u.com W U Silkscreen Top Top Side LTC2280 2280fa 21 ...
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... LTC2280 U U APPLICATIO S I FOR ATIO Inner Layer 2 GND www.datasheet4u.com Bottom Side Inner Layer 3 Power 2280fa ...
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... Plastic QFN (9mm × 9mm) (Reference LTC DWG # 05-08-1705) 0.70 ±0.05 7.15 ±0.05 8.10 ±0.05 9.50 ±0.05 (4 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 0.75 ± 0.05 7.15 ± 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LTC2280 R = 0.115 TYP 63 64 0.40 ± 0. PIN 1 CHAMFER (UP64) QFN 1003 0.25 ± 0.05 0.50 BSC BOTTOM VIEW—EXPOSED PAD ...
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... LTC2280 RELATED PARTS PART NUMBER DESCRIPTION LTC2220 12-Bit, 170Msps ADC LTC2221 12-Bit, 135Msps ADC www.datasheet4u.com LTC2222 12-Bit, 105Msps ADC LTC2223 12-Bit, 80Msps ADC LTC2224 12-Bit, 135Msps ADC LTC2225 12-Bit, 10Msps ADC LTC2226 12-Bit, 25Msps ADC LTC2227 12-Bit, 40Msps ADC LTC2228 12-Bit, 65Msps ADC ...