LTC2288 LINER [Linear Technology], LTC2288 Datasheet
LTC2288
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LTC2288 Summary of contents
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... A/D converters de- signed for digitizing high frequency, wide dynamic range signals. The LTC2288/LTC2287/LTC2286 are perfect for demanding imaging and communications applications with AC performance that includes 61.6dB SNR and 85dB SFDR for signals well beyond the Nyquist frequency. ...
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... Digital Input Voltage .................... –0. Digital Output Voltage ................ –0.3V to (OV Power Dissipation ............................................ 1500mW Operating Temperature Range LTC2288C, LTC2287C, LTC2286C ........... 0°C to 70°C LTC2288I, LTC2287I, LTC2286I ..........–40°C to 85°C Storage Temperature Range ..................–65°C to 125°C Lead Temperature (Soldering, 10 sec).................. 300°C ...
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... < < SENSEA, SENSEB < < MODE < Figure 8 Test Circuit The ● denotes the specifications which apply over the full operating temperature range, = –1dBFS. (Note 4) IN LTC2288 MIN TYP MAX 61.8 ● ● ● 60 61.8 61.7 61.6 85 ● ● ● ...
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... LTC2288/LTC2287/LTC2286 TER AL REFERE CE CHARACTERISTICS PARAMETER V Output Voltage CM 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 3: When these pin voltages are taken below GND or above V will be clamped by internal diodes. This product can handle input currents of greater than 100mA below GND or above V Note 3V 65MHz (LTC2288), 40MHz (LTC2287 SAMPLE 25MHz (LTC2286), input range = 2V with differential drive, unless P-P otherwise noted ...
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... FREQUENCY (MHz) 228876 G05 LTC2288: 8192 Point 2-Tone FFT 28.2MHz and 26.8MHz, IN –1dB, 2V Range 65Msps 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 0 5 ...
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... G13 RANGE 228876 G15 LTC2288: SNR and SFDR vs Sample Rate, 2V Range 5MHz, –1dB IN 100 SFDR SNR 60 50 200 SAMPLE RATE (Msps) 228876 G11 LTC2288: SFDR vs Input Level, ...
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... LTC2288/LTC2287/LTC2286 W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2287: Typical INL, 2V Range, 40Msps 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 256 512 768 1024 CODE 228876 G17 LTC2287: 8192 Point FFT 30MHz, –1dB, 2V Range, IN 40Msps 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 – ...
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... INPUT LEVEL (dBFS) 228876 G29 LTC2286: Typical INL, 2V Range, 25Msps 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 512 0 256 768 1024 CODE 228876 G32 LTC2288/LTC2287/LTC2286 LTC2287: SNR and SFDR vs Sample Rate, 2V Range 5MHz, –1dB IN 100 SFDR SNR SAMPLE RATE (Msps) ...
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... LTC2288/LTC2287/LTC2286 W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2286: 8192 Point FFT 30MHz, –1dB, 2V Range, IN 25Msps 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 FREQUENCY (MHz) 228876 G35 LTC2286: 8192 Point 2-Tone FFT 10.9MHz and 13.8MHz, IN – ...
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... CLKB (Pin 9): Channel B Clock Input. The input sample starts on the positive edge. REFLB (Pins 11, 12): Channel B Low Reference. Short together and bypass to Pins 13, 14 with a 0.1µF ceramic LTC2288/LTC2287/LTC2286 LTC2286 Sample Rate, VDD 5MHz Sine Wave Input, –1dB ...
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... LTC2288/LTC2287/LTC2286 CTIO S MUX (Pin 21): Digital Output Multiplexer Control. If MUX is High, Channel A comes out on DA0-DA13, OFA; Channel B comes out on DB0-DB13, OFB. If MUX is Low, the output busses are swapped and Channel A comes out on DB0- DB13, OFB; Channel B comes out on DA0-DA13, OFA. To multiplex both channels onto a single output bus, connect MUX, CLKA and CLKB together ...
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... ADC STAGE – 1.5V CM REFERENCE 2.2µF RANGE SELECT REF BUF SENSE Figure 1. Functional Block Diagram (Only One Channel is Shown) LTC2288/LTC2287/LTC2286 W SECOND PIPELINED THIRD PIPELINED FOURTH PIPELINED ADC STAGE ADC STAGE ADC STAGE REFH REFL INTERNAL CLOCK SIGNALS CLOCK/DUTY DIFF CYCLE REF ...
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... LTC2288/LTC2287/LTC2286 DIAGRA ANALOG N INPUT t H CLK – 6 D0-D9, OF ANALOG A INPUT A ANALOG B INPUT B t CLKA = CLKB = MUX A – 6 D0A-D9A, OFA D0B-D9B, OFB B – Dual Digital Output Bus Timing (Only One Channel is Shown – – ...
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... CONVERTER OPERATION As shown in Figure 1, the LTC2288/LTC2287/LTC2286 are dual CMOS pipelined multistep converters. The convert- ers have six pipelined ADC stages; a sampled analog input will result in a digitized value six 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 LTC2288/ LTC2287/LTC2286 CMOS differential sample-and-hold. The analog inputs are connected to the sampling capaci- tors (C ...
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... Poor matching will result in higher even order harmonics, especially the second. Input Drive Circuits Figure 3 shows the LTC2288/LTC2287/LTC2286 being driven transformer with a center tapped second- ary. The secondary center tap is DC biased with V setting the ADC input signal at its optimum DC level. ...
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... ARE 0402 PACKAGE SIZE 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 LTC2288 LTC2287 LTC2286 228876 F06 LTC2288 LTC2287 LTC2286 228876 F07 LTC2288 LTC2287 LTC2286 228876 F08 228876f ...
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... U U APPLICATIO S I FOR ATIO Reference Operation Figure 9 shows the LTC2288/LTC2287/LTC2286 refer- ence circuitry consisting of a 1.5V bandgap reference, a difference amplifier and switching and control circuit. The internal voltage reference can be configured for two pin selectable input ranges of 2V (±1V differential (± ...
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... For the ADC to operate properly, the CLK signal should have a 50% (±5%) duty cycle. Each half cycle must have at least 7.3ns (LTC2288), 11.8ns (LTC2287), and 18.9ns (LTC2286) for the ADC internal circuitry to have enough settling time for proper operation. ...
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... DD from the digital outputs. Data Format Using the MODE pin, the LTC2288/LTC2287/LTC2286 parallel digital output can be selected for offset binary or 2’s complement format. Note that MODE controls both Channel A and Channel B. Connecting MODE to GND or 1/3V selects straight binary output format ...
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... Heat Transfer Most of the heat generated by the LTC2288/LTC2287/ LTC2286 is transferred from the die through the bottom- side exposed pad and package leads onto the printed circuit board. For good electrical and thermal perfor- mance, the exposed pad should be soldered to a large grounded pad on the PC board ...
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... U U APPLICATIO S I FOR ATIO LTC2288/LTC2287/LTC2286 W U 228876f 23 ...
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... LTC2288/LTC2287/LTC2286 U U APPLICATIO S I FOR ATIO Silkscreen Top Top Side 228876f ...
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... U U APPLICATIO S I FOR ATIO LTC2288/LTC2287/LTC2286 W U Inner Layer 2 GND Inner Layer 3 Power 228876f 25 ...
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... LTC2288/LTC2287/LTC2286 U U APPLICATIO S I FOR ATIO Bottom Side 228876f ...
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... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC2288/LTC2287/LTC2286 U UP Package 64-Lead Plastic QFN (9mm × 9mm) (Reference LTC DWG # 05-08-1705) 0.70 ± ...
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... LTC2288/LTC2287/LTC2286 RELATED PARTS PART NUMBER DESCRIPTION LTC1403A/LTC1403 14-Bit/12-Bit 2.8Msps Serial ADC LTC1407A/LTC1407 14-Bit/12-Bit 3Msps, Simultaneous Sampling Serial ADC LTC1749 12-Bit, 80Msps Wideband ADC LTC1750 14-Bit, 80Msps Wideband ADC LTC2225 12-Bit, 10Msps ADC LTC2226 12-Bit, 25Msps ADC LTC2227 12-Bit, 40Msps ADC ...