LTC6405 Linear Technology, LTC6405 Datasheet
LTC6405
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LTC6405 Summary of contents
Page 1
... The LTC6405 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 400μA. The LTC6405 is available in a compact 3mm × 3mm 16-pin leadless QFN package, as well as an 8-lead MSOP package, and operates over a –40°C to 85°C temperature range. ...
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... For more information on lead free part marking, go to: This product is only offered in trays. For more information go to: 2 (Note 1) Specifi ed Temperature Range (Note 5) LTC6405I.............................................. –40°C to 85°C ) (Note 2) ............±10mA LTC6405C ................................................ 0°C to 70°C Junction Temperature ........................................... 150°C Storage Temperature Range ................... –65°C to 150°C 8 +IN SHDN 7 – ...
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... Differential Input – OUTCM OCM Pin) OCM Pin Pin V = Open OCM OCM –5mA 5mA L LTC6405 – 2.5V, V SHDN CM OCM ICM + – – defi ned as (V OUTCM +OUT MIN TYP MAX l ±1 ±7 l ±0.5 ±3.5 l ± ...
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... LTC6405 www.DataSheet4U.com DC ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifi cations are at T circuit component values in Figure 1 used, unless otherwise noted defi ned )/2. V ICM +IN –IN OUTDIFF SYMBOL PARAMETER A Large-Signal Open Loop Voltage Gain VOL V Supply Voltage Range ...
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... Note 10: Extended operation with the output shorted may cause the junction temperature to exceed the 150°C limit. Note 11: Because the LTC6405 is a feedback amplifi er with low output impedance, a resistive load is not required when driving an ADC. Therefore, typical output power can be very small in many applications. In order to compare the LTC6405 with “ ...
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... LTC6405 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS Differential Input Referred Offset Voltage vs Temperature 1 0 2.5V OCM 0 2.5V ICM 200Ω 0.4 FIVE REPRESENTATIVE UNITS 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 –50 – TEMPERATURE (°C) Supply Current vs Supply Voltage OPEN SHDN T = –40°C ...
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... 2.5V OCM 200 , C = 1.8pF 0.1% FEEDBACK NETWORK RESISTORS 100 FREQUENCY (MHz) 6405 G10 LTC6405 Differential Slew Rate vs Temperature 4 720 700 3 680 2 660 640 1 620 600 0 4 4.5 5 –50 – TEMPERATURE (°C) 6405 G08 Differential PSRR vs Frequency ...
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... LTC6405 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS Small Signal Step Response +OUT –OUT 10ns/DIV 200 2. 1.8pF OCM ICM 400 C = 0pF LOAD L Frequency Response vs Closed Loop Gain 100 ...
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... R = 800 LOAD 200 I F –90 2TONES,1MHz TONE SPACING, 2V COMPOSITE P-P DIFFERENTIAL INPUTS –100 100 0 0.5 1 1.5 2 2.5 3 INPUT COMMON MODE VOLTAGE (V) 6405 G25 LTC6405 (QFN Package) Harmonic Distortion vs Input Amplitude – 2. P-P OCM ICM V = OPEN (2.8V) –50 TIP f = 50MHz IN = 200 800 LOAD – ...
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... LTC6405 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS Frequency Response vs Load Capacitance 10pF 0pF L – – 2.5V OCM ICM R = 400 LOAD – 300 , C = 1pF CAPACITOR VALUES ARE FROM EACH –40 OUTPUT TO GROUND. NO SERIES RESISTORS ARE USED. – ...
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... See the Applications Information section for more details. SHDN (Pin 7/Pin 1): When SHDN is fl oating or directly tied to V ing mode. When the SHDN pin is connected to V LTC6405 enters into a low power shutdown state with Hi-Z outputs. + – and V with +IN, – ...
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... LTC6405 Block Diagram/Pinout in MSOP Package – SHDN +IN V – 37k + – 37k – – – OCM LTC6405 Block Diagram/Pinout in QFN Package +IN –OUT + + 37k + + V – – 37k V 30k – – 38k – –IN +OUT ...
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... RESISTORS *TO OPTIMIZE THE HIGH FREQUENCY PERFORMANCE FOR THE PIN CONFIGURATION OF THE LTC6405 IN THE SMALL MSOP PACKAGE, A FEEDBACK RESISTANCE OF AT LEAST 300Ω IS RECOMMENDED. mode noise (like power supply noise). The LTC6405 can be used as a single ended input to differential output amplifi er differential input to differential output amplifi ...
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... R : 0.1% RESISTORS *TO OPTIMIZE THE HIGH FREQUENCY PERFORMANCE FOR THE PIN CONFIGURATION OF THE LTC6405 IN THE SMALL MSOP PACKAGE, A FEEDBACK RESISTANCE OF AT LEAST 300Ω IS RECOMMENDED. 14 IC. The LTC6405 also has clamping diodes to either power supply on the V voltages which exceed either supply, they too, should be current limited to under 10mA ...
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... These ADCs are typically supplied from a single supply voltage which can be as low as 3V, and will have an optimal common mode input range of 1.25V or 1.5V. The LTC6405 makes interfac- ing to these ADCs easy, by providing both single-ended to differential conversion as well as common mode level shifting ...
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... V ≈ (V – V OSDIFF(APPARENT) ICM Using the LTC6405 in a single supply application on a single 5V supply with 1% resistors, and the input com- mon mode grounded, with the V worst case DC offset can induce 25mV of apparent offset voltage. With 0.1% resistors, the worst case apparent offset reduces to 2.5mV. ...
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... Use the equations above to check that the V – amp inputs is within range (V Manipulating the Rail-to-Rail Input Stage with achieve rail-to-rail input operation, the LTC6405 features ICM , and an NPN input stage in parallel with a PNP input stage. When +IN the input common mode voltage is near V active while the PNPs are off ...
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... Output Filter Considerations and Use Filtering at the output of the LTC6405 is often desired to provide anti-aliasing or to improve signal to noise ratio. To simplify this fi ltering, the LTC6405 in the QFN package –OUT includes an additional pair of differential outputs (+OUTF and –OUTF) which incorporate an internal lowpass RC network with a – ...
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... APPLICATIONS INFORMATION The outputs of the LTC6405 are designed to drive 5pF to ground, so care should be taken to not lower the effec- tive impedance between +OUT and +OUTF or –OUT and –OUTF below 15Ω. To decrease fi lter bandwidth, add two external capacitors, one from +OUTF to ground, and the other from –OUTF to ground. A single differential capacitor connected between +OUTF and – ...
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... Layout Considerations Because the LTC6405 is a very high speed amplifi er sensitive to both stray capacitance and stray inductance. In the QFN package, three pairs of power supply pins are provided to keep the power supply inductance as low as possible to prevent any degradation of amplifi ...
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... In general, the LTC6405 will settle much more quickly from these periodic load impulses than from a 2V input step, but good idea to place an R-C fi lter ...
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... Attenuating and Level Shifting a Single-Ended ±5V Signal to a Differential 2V Signal at a 1.25V Common Mode P-P C1, 2.7pF 2V LEVEL-SHIFTED TO 1.25V R3, 100 5V R5 511 – LTC6405 ) V 511 P – R4, 100 C2, 2.7pF MS8E Package 8-Lead Plastic MSOP , Exposed Die Pad (Reference LTC DWG # 05-08-1662 Rev D) BOTTOM VIEW OF EXPOSED PAD OPTION 0.889 ± ...
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... LTC DWG # 05-08-1691) 0.70 ±0.05 PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 0.75 ± 0.05 3.00 ± 0.10 (4 SIDES) PIN 1 TOP MARK (NOTE 6) 1.45 ± 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LTC6405 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH R = 0.20 TYP R = 0.115 OR 0.25 × 45° CHAMFER TYP 15 16 0.40 ± 0. (UD16) QFN 0904 0.25 ± 0.05 0.50 BSC 6405fa 23 ...
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... FAX: (408) 434-0507 ● DC-Coupled Level Shifting of Demodulator Output C5, 10pF DIFF OUTPUT Z 130 2.5pF 5V R5, 324 5pF DC LEVEL 5V 3.8V 65 15nH + LTC6405 15nH – 4.7pF 4.7pF 5pF 65 R6, 324 IDENTICAL C4, 10pF Q CHANNEL GAIN: 14dB GAIN: 3dB INPUT NF: 11dB INPUT NF: 13dB ...