Datasheet AD8338 (Analog Devices) - 9

Data Sheet AD8338 0 0 VOUT = 0.5V p-p –10 –10 Bc) –20 d ) –20 c N ( dB IO –30 ( –30 RT O TION T –40 S –40 HD3, MODE PIN LOW TOR C DI IS –50 NI D –50 3 O D HD3, MODE PIN HIGH IM –60 HD2, MODE PIN LOW –60 HARM –70 –70 HD2, MODE PIN HIGH –80 –80 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
123
20k 200k 2M 20M
124
V FREQUENCY (Hz) GAIN (V)
11279- 11279- Figure 22. Harmonic Distortion vs. VGAIN Figure 25. IMD3 Distortion vs. Frequency
20 2.0 OUTPUT VOUT = 2V p-p f = 1MHz 10 1.5 GAIN = 0dB 0 1.0 Bm) d –10 N ( 0.5 IO S –20 S (V) 0 RE UT P –30 OV M –0.5 –40 B CO 1d INPUT –1.0 P –50 –60 –1.5 –70 –2.0 0.1 0.3 0.5 0.7 0.9 1.1
122
0 100 200 300 400 500 600 700 800
027
VGAIN (V) TIME (ns)
1279- 11279- 1 Figure 23. Input and Output 1 dB Compression vs. VGAIN Figure 26. Large Signal Pulse Response vs. Time, VGAIN = 0 V
25 2.0 VOUT = 2V p-p f = 1MHz 1.5 GAIN = 80dB 20 1.0 100kHz 0.5 15 Bm) d (V) 0 3 ( UT O IP V O 10 –0.5 1MHz –1.0 5 –1.5 0 –2.0 0.1 0.3 0.5 0.7 0.9 1.1
028 125
0 0.2 0.4 0.6 0.8 V TIME (µs)
1279-
GAIN (V)
1 11279- Figure 24. OIP3 vs. VGAIN Figure 27. Large Signal Pulse Response vs. Time, VGAIN = 1.0 V Rev. A | Page 9 of 20 Document Outline Features Applications General Description Functional Block Diagram Revision History Specifications AC Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Introduction Overall Structure of the AD8338 VGA Core Normal Operating Conditions INPR, INMR, INPD, and INMD Pins FBKP, FBKM, OUTP, and OUTM Pins Linear-in-dB Gain Control, GAIN Pin Inversion of the Gain Slope, MODE Pin Offset Correction Circuit, OFSN Pin AGC Circuit, VAGC Pin Internal Reference, Pin VREF Explanation of the Gain Function Effects of Using External Resistors Adjusting The Output Common-Mode Voltage Applications Information Simple On-Off Keyed (OOK) Receiver Interfacing the AD8338 to an ADC Outline Dimensions Ordering Guide