Datasheet AD641 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 250 MHz Demodulating Logarithmic Amplifier |
| Pages / Page | 18 / 6 — Typical AC Performance Characteristics–AD641. –2.25. –2.00. 50MHz. –1.75. … |
| Revision | D |
| File Format / Size | PDF / 426 Kb |
| Document Language | English |
Typical AC Performance Characteristics–AD641. –2.25. –2.00. 50MHz. –1.75. +125. 150MHz. +25. 190MHz. –1.50. 210MHz. 250MHz. –1.25. –55. –1.00. ERROR
Model Line for this Datasheet
Text Version of Document
Typical AC Performance Characteristics–AD641 –2.25 –2.00 5 50MHz –2.00 –1.75 +125
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C 4 150MHz +125
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C +25
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C –1.75 190MHz –1.50 3 210MHz –1.50 250MHz –1.25 +25
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C –55
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C 2 –1.25 –1.00 ERROR 1 –55
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C –1.00 –0.75 0 +125
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C –0.75 –0.50 –1 OUTPUT – mA ERROR IN – dB +25
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C –0.50 –0.25 –2 +125
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C –55
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C OUTPUT CURRENT – mA OUTPUT –0.25 –0.00 –3 +25
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C 0.00 0.25 –4 –55
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C 0.25 0.50 –5 –52 –48 –44 –40 –36 –32 –28 –24 –20 –16 –12 –8 –4 0 2 –52 –48 –44 –40 –36 –32 –28 –24 –20 –16 –12 –8 –4 0 2 INPUT LEVEL – dBm INPUT LEVEL – dBm
Figure 10. AC Response at 50 MHz, 150 MHz, 190 MHz, Figure 13. Logarithmic Response and Linearity at 210 MHz at 250 MHz, vs. dBm Input (Sinusoidal Input) 200 MHz, TA for TA = –55°C, +25°C, +125°C
87.5 1.0 85.0 0.95 82.5 0.90 80.0 77.5 0.85 75.0 SLOPE CURRENT – mA INTERCEPT LEVEL – dBm 0.80 72.5 70.0 0.75 50 100 150 170 190 210 230 250 50 150 190 210 250 INPUT FREQUENCY – MHz INPUT FREQUENCY – MHz
Figure 11. Intercept Level (dBm) vs. Frequency (Cascaded Figure 14. Slope Current, IY, vs. Input Frequency AD641s—Sinusoidal Input)
5µs 5µs 100 90 10 0% 20mV 20mV
Figure 12. Baseband Pulse Response of Single AD641, Figure 15. Baseband Pulse Response of Cascaded AD641s Inputs of 1 mV, 10 mV and 100 mV at Inputs of 0.2 mV, 2 mV, 20 mV and 200 mV REV. D –5– Document Outline FEATURES PRODUCT DESCRIPTION PIN CONFIGURATIONS AD641--SPECIFICATIONS ELECTRICAL CHARACTERISTICS THERMAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION REVISION HISTORY AD641--TYPICAL DC PERFORMANCE CHARACTERISTICS TYPICAL AC PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION CIRCUIT OPERATION FUNDAMENTALS OF LOGARITHMIC CONVERSION INTERCEPT STABILIZATION CONVERSION RANGE EFFECT OF WAVEFORM ON INTERCEPT LOGARITHMIC CONFORMANCE AND WAVEFORM SIGNAL MAGNITUDE INTERCEPT AND LOGARITHMIC OFFSET OPERATION OF A SINGLE AD641 ACTIVE CURENT-TO-VOLTAGE CONVERSION EFFECT OF FREQUENCY ON CALIBRATION SOURCE RESISTANCE AND INPUT OFFSET USING HIGHER SUPPLY VOLTAGES USING THE ATTENUATOR OPERATION OF CASCADED AD641s ELIMINATING THE EFFECT OF FIRST STAGE OFFSET PRACTICAL APPLICATIONS RSSI APPLICATIONS 250 MHz RSSI CONVERTER WITH 58 dB DYNAMIC RANGE OUTLINE DIMENSIONS ORDERING GUIDE
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C 4 150MHz +125
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C +25
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C –1.75 190MHz –1.50 3 210MHz –1.50 250MHz –1.25 +25
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C –55
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C 2 –1.25 –1.00 ERROR 1 –55
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C –1.00 –0.75 0 +125
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C –0.75 –0.50 –1 OUTPUT – mA ERROR IN – dB +25
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C –0.50 –0.25 –2 +125
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C –55
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C OUTPUT CURRENT – mA OUTPUT –0.25 –0.00 –3 +25
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C 0.00 0.25 –4 –55
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C 0.25 0.50 –5 –52 –48 –44 –40 –36 –32 –28 –24 –20 –16 –12 –8 –4 0 2 –52 –48 –44 –40 –36 –32 –28 –24 –20 –16 –12 –8 –4 0 2 INPUT LEVEL – dBm INPUT LEVEL – dBm
Figure 10. AC Response at 50 MHz, 150 MHz, 190 MHz, Figure 13. Logarithmic Response and Linearity at 210 MHz at 250 MHz, vs. dBm Input (Sinusoidal Input) 200 MHz, TA for TA = –55°C, +25°C, +125°C
87.5 1.0 85.0 0.95 82.5 0.90 80.0 77.5 0.85 75.0 SLOPE CURRENT – mA INTERCEPT LEVEL – dBm 0.80 72.5 70.0 0.75 50 100 150 170 190 210 230 250 50 150 190 210 250 INPUT FREQUENCY – MHz INPUT FREQUENCY – MHz
Figure 11. Intercept Level (dBm) vs. Frequency (Cascaded Figure 14. Slope Current, IY, vs. Input Frequency AD641s—Sinusoidal Input)
5µs 5µs 100 90 10 0% 20mV 20mV
Figure 12. Baseband Pulse Response of Single AD641, Figure 15. Baseband Pulse Response of Cascaded AD641s Inputs of 1 mV, 10 mV and 100 mV at Inputs of 0.2 mV, 2 mV, 20 mV and 200 mV REV. D –5– Document Outline FEATURES PRODUCT DESCRIPTION PIN CONFIGURATIONS AD641--SPECIFICATIONS ELECTRICAL CHARACTERISTICS THERMAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION REVISION HISTORY AD641--TYPICAL DC PERFORMANCE CHARACTERISTICS TYPICAL AC PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION CIRCUIT OPERATION FUNDAMENTALS OF LOGARITHMIC CONVERSION INTERCEPT STABILIZATION CONVERSION RANGE EFFECT OF WAVEFORM ON INTERCEPT LOGARITHMIC CONFORMANCE AND WAVEFORM SIGNAL MAGNITUDE INTERCEPT AND LOGARITHMIC OFFSET OPERATION OF A SINGLE AD641 ACTIVE CURENT-TO-VOLTAGE CONVERSION EFFECT OF FREQUENCY ON CALIBRATION SOURCE RESISTANCE AND INPUT OFFSET USING HIGHER SUPPLY VOLTAGES USING THE ATTENUATOR OPERATION OF CASCADED AD641s ELIMINATING THE EFFECT OF FIRST STAGE OFFSET PRACTICAL APPLICATIONS RSSI APPLICATIONS 250 MHz RSSI CONVERTER WITH 58 dB DYNAMIC RANGE OUTLINE DIMENSIONS ORDERING GUIDE
