Datasheet AD8432 (Analog Devices) - 7

Data Sheet AD8432 TYPICAL PERFORMANCE CHARACTERISTICS
VS = 5 V, TA = 25°C, RS = RIN = 50 Ω, RFB =150 Ω, CSH = 47 pF, RSH = 15 Ω, RL =500 Ω (per SE output), CL = 5 pF (per SE output), G = 12.04 dB (single-ended input to differential output), f = 1 MHz, unless otherwise specified.
30 24 24 18 18 12 12 ) 6 6 B ) d B ( d 0 ( IN 0 IN GA –6 GA –6 –12 –12 –18 G = 24.08dB RIN UNTERMINATED G = 21.58dB R –24 –18 IN = 200Ω G = 18.06dB RIN = 100Ω G = 12.04dB RIN = 50Ω –30 –24
3
1 10 100 1k
6 00
1 10 100 1k
05 1- 1- 34
FREQUENCY (MHz) FREQUENCY (MHz)
34 08 08 Figure 3. Small Signal Differential Gain vs. Frequency, RIN Unterminated Figure 6. Small Signal Frequency Response vs. RIN, G = 21.58 dB
24 30 21 24 18 18 15 12 12 ) B 9 ) d B 6 ( d ( IN 6 IN 0 GA 3 GA 0 –6 –3 –12 –6 RIN UNTERMINATED R R IN UNTERMINATED IN = 200Ω R –9 R –18 IN = 200Ω IN = 100Ω RIN = 100Ω RIN = 50Ω R –12 IN = 50Ω –24 1 10 100 500
04 7 0
1 10 100 1k
1- -05
FREQUENCY (MHz)
34 41
FREQUENCY (MHz)
08 83 0 Figure 4. Small Signal Frequency Response vs. RIN, G = 12.04 dB Figure 7. Small Signal Frequency Response vs. RIN, G = 24.08 dB
24 30 18 24 12 18 12 6 ) B ) d B 6 ( d 0 ( IN IN GA A 0 G –6 –6 –12 –12 RIN UNTERMINATED G = 24.08dB –18 RIN = 200Ω G = 21.58dB R –18 IN = 100Ω G = 18.06dB RIN = 50Ω G = 12.04dB –24 –24 1 10 100 1k
58 55
1 10 100 1k
0 -0 1-
FREQUENCY (MHz)
41 834 83
FREQUENCY (MHz)
0 0 Figure 5. Small Signal Frequency Response vs. RIN, G = 18.06 dB Figure 8. Differential Gain vs. Frequency, VOUT = 1 V p-p, RIN = 50 Ω Rev. D | Page 7 of 32 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION LOW NOISE AMPLIFIER (LNA) GAIN SETTING TECHNIQUE ACTIVE INPUT RESISTANCE MATCHING APPLICATIONS INFORMATION TYPICAL SETUP I/Q DEMODULATION FRONT END DIFFERENTIAL-TO-SINGLE-ENDED CONVERSION EVALUATION BOARD CONNECTION AND OPERATION Power Supply Input Termination Setting the Amplifier Gain Output SCHEMATIC OUTLINE DIMENSIONS ORDERING GUIDE NOTES NOTES NOTES