lt5570 Linear Technology Corporation, lt5570 Datasheet
lt5570
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lt5570 Summary of contents
Page 1
... AC signal in an equivalent decibel-scaled value is precisely converted into DC voltage on a linear scale, independent of the crest factor of the waveforms. The LT5570 is suitable for precision RF power measurement and level control for a wide variety of RF standards, including CDMA, W-CDMA, CDMA2000, TD-SCDMA and WiMAX. ...
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... Operating Temperature Range.................. –40°C to 85°C Storage Temperature Range ................... –65°C to 125°C CAUTION: This part is sensitive to electrostatic discharge very important that proper ESD precautions be observed when handling the LT5570. ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT5570IDD#PBF LT5570IDD#TRPBF Consult LTC Marketing for parts specifi ...
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... 10dBm IN = 10dBm IN = –40°C to 85°C A < 85° –36dBm to 13dBm –40°C to 85°C A < 85° –31dBm to 13dBm 2140MHz RF = 2140MHz RF LT5570 MIN TYP MAX UNITS – dBm 61 dB 37.7 mV/dB –51.9 dBm ±0.4 dB 0.3 dB 0.2 60 dBc 61 dBc – ...
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... LT5570 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T Figures 1 and 3. (Notes 2 and 3). PARAMETER CONDITIONS Enable (EN) Low = Off, High = On EN Input High Voltage (On) EN Input Low Voltage (Off) Enable Pin Input Current Turn ON Time V OUT Turn OFF Time ...
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... T = –40° 25° 85°C A –3 –15 – 5570 G05 LT5570 (Test Circuits Shown in Figures 1 and 3) Linearity Error vs Frequency 25° –1 500MHz –2 880MHz 2140MHz 2700MHz –3 –55 –45 –35 –25 –15 – ...
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... LT5570 TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage, Linearity Error vs RF Input Power, 2140MHz 2.4 2.0 1.6 1.2 0.8 0.4 0 –45 –25 –15 –35 RF INPUT POWER (dBm) Output Voltage, Linearity Error vs RF Input Power, 2700MHz 2.4 2.0 1.6 1.2 0.8 0.4 0 –45 –35 –25 –15 RF INPUT POWER (dBm) Slope vs Frequency 25° ...
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... Input Return Loss vs Frequency Reference in Figure 3 0 –5 –10 –15 –20 –25 –30 0 100 200 300 400 500 600 700 800 FREQUENCY (MHz) LT5570 (Test Circuits Shown in Figures 1 and PULSE ON PULSE 2 OFF OFF – 10dBm 0dBm IN – –10dBm IN – ...
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... LT5570 PIN FUNCTIONS V (Pin 1): Power Supply Pin for the Bias Circuits. Typi- CC cal current consumption is 26.5mA. This pin should be externally bypassed with 1nF and 1μF chip capacitors. + – (Pins 2, 4): Differential Input Signal Pins. These pins are preferably driven with a differential signal for optimum performance ...
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... LT5570 DEC 4 4 – GND 1nF EXPOSED PAD PART NUMBER L1 L1 P/N 8.2nH TOKO LL1005-FH8N25 3.3nH TOKO LL1005-FH3N35 1.2nH TOKO LL1005-FH1N25 LT5570 22nF 1nF FLTR 9 EN ENABLE DNC 100k 7 DNC NC 6 OUT OUT C6 (OPT) C7 2.7pF MURATA GRM1555C1H2R7DZ01 0 ...
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... Taiyo Yuden LMK107BJ105MA Figure 3. Test Schematic for 40MHz to 860MHz Applications Figure 4. Top Side of Evaluation Board for 40MHz to 860MHz Applications ETC4-1 LT5570 DEC – GND 1nF EXPOSED PAD PART NUMBER REF DES C9, L1 ...
Page 11
... W-CDMA waveform. However the minimum detectable RF power level degrades as the input RF frequency increases. Due to the high RF input impedance of the LT5570, a narrow band L-C matching network can be used for the S11 conversion of a single-ended to balanced signal as well. ...
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... CC from voltage supply assure stable operation of the CC LT5570, an external capacitor C1 with a value of 22nF or higher is required to connect the FLTR Pin to V connect this fi ltering capacitor to ground or any other low voltage reference at any time to avoid an abnormal start-up condition. ...
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... RF input port. The total rise time of the LT5570 is about 0.5μs and the total fall time is 8μs, respectively, for full-scale pulsed RF input power. The speed of the output transient response is dictated mainly by the fi ...
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... LOAD A simplifi ed schematic of the EN Pin interface is shown in Figure 11. The enable voltage necessary to turn on the LT5570 is 2V. To disable or turn off the chip, this voltage should be below 1V important that the voltage applied to the EN pin should never exceed V Otherwise, the supply current may be sourced through the upper ESD protection diode connected at the EN pin ...
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... DD Package 10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1699) 0.675 0.05 PIN 1 PACKAGE TOP MARK OUTLINE (SEE NOTE 6) 0.200 REF LT5570 R = 0.115 0.38 0.10 TYP 6 10 1.65 0.10 3.00 0.10 (4 SIDES) (2 SIDES ...
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... LT5570 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5514 Ultralow Distortion, IF Amplifi er/ADC Driver with Digitally Controlled Gain LT5515 1.5GHz to 2.5GHz Direct Conversion Quadrature Demodulator LT5516 0.8GHz to 1.5GHz Direct Conversion Quadrature Demodulator LT5517 40MHz to 900MHz Quadrature Demodulator LT5518 1.5GHz to 2.4GHz High Linearity Direct ...