Datasheet AD8338 (Analog Devices) - 10
| Fabricante | Analog Devices |
| Descripción | Low Power, 18 MHz Variable Gain Amplifier |
| Páginas / Página | 20 / 10 — AD8338. Data Sheet. 2.0. 1.5. f = 100kHz. OUT = 2V p-p. f = 1MHz. VIN LOW … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 483 Kb |
| Idioma del documento | Inglés |
AD8338. Data Sheet. 2.0. 1.5. f = 100kHz. OUT = 2V p-p. f = 1MHz. VIN LOW = 2mV. GAIN = 40dB. VIN HIGH = 20mV. 1.0 GAIN = 40dB. 1.0. ) V (. 0.5
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AD8338 Data Sheet 2.0 1.5 V f = 100kHz OUT = 2V p-p f = 1MHz VIN LOW = 2mV 1.5 GAIN = 40dB VIN HIGH = 20mV 1.0 GAIN = 40dB 1.0 ) V ( 0.5 0.5 GE (V) 0 OLTA 0 UT OV T V U –0.5 TP –0.5 OU –1.0 –1.0 –1.5 –2.0 –1.5 0 0.2 0.4 0.6 0.8
030
0 20 40 60 80 100 120 140 160 180 200
018
TIME (µs)
1279- 1
TIME (µs)
11279- Figure 28. Large Signal Pulse Response vs. Time, VGAIN = 0.6 V Figure 31. Overdrive Recovery vs. Time
100 12 CL = 0pF –40°C, MODE PIN HIGH C 80 L = 10pF +25°C, MODE PIN HIGH CL = 20pF C 10 +85°C, MODE PIN HIGH 60 L = 47pF –40°C, MODE PIN LOW +25°C, MODE PIN LOW 40 8 +85°C, MODE PIN LOW 20 V) (m 0 mA) 6 ( UT O I DD V –20 4 –40 –60 2 VOUT = 100mV p-p –80 f = 1.5MHz GAIN = 1 –100 0 0 0.2 0.4 0.6 0.8
031
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
131
TIME (µs)
1279-
V
1
GAIN (V)
1279- 1 Figure 29. Small Signal Pulse Response vs. Time (Varying Capacitive Loads) Figure 32. Supply Current vs. VGAIN
50 OFFSET NULL OFF 40 VGAIN 0.6 30 10µF 1µF 20 0.1µF 0.1 EP (V) B) 10 d ST V N ( 0.01µF IN OUT AI 0 A G G 1.0 –10 0 –20 –1.0 –30 GAIN = 100 –40 0 1 2 3 4 5 6 7 8 9 10
127
20 100 1k 10k 100k 1M 10M 100M
134
TIME (µs)
11279-
FREQUENCY (Hz)
11279- Figure 30. Gain Step Response vs. Time Figure 33. Offset Null Bandwidth vs. Offset Null Capacitor Rev. A | Page 10 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
030
0 20 40 60 80 100 120 140 160 180 200
018
TIME (µs)
1279- 1
TIME (µs)
11279- Figure 28. Large Signal Pulse Response vs. Time, VGAIN = 0.6 V Figure 31. Overdrive Recovery vs. Time
100 12 CL = 0pF –40°C, MODE PIN HIGH C 80 L = 10pF +25°C, MODE PIN HIGH CL = 20pF C 10 +85°C, MODE PIN HIGH 60 L = 47pF –40°C, MODE PIN LOW +25°C, MODE PIN LOW 40 8 +85°C, MODE PIN LOW 20 V) (m 0 mA) 6 ( UT O I DD V –20 4 –40 –60 2 VOUT = 100mV p-p –80 f = 1.5MHz GAIN = 1 –100 0 0 0.2 0.4 0.6 0.8
031
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
131
TIME (µs)
1279-
V
1
GAIN (V)
1279- 1 Figure 29. Small Signal Pulse Response vs. Time (Varying Capacitive Loads) Figure 32. Supply Current vs. VGAIN
50 OFFSET NULL OFF 40 VGAIN 0.6 30 10µF 1µF 20 0.1µF 0.1 EP (V) B) 10 d ST V N ( 0.01µF IN OUT AI 0 A G G 1.0 –10 0 –20 –1.0 –30 GAIN = 100 –40 0 1 2 3 4 5 6 7 8 9 10
127
20 100 1k 10k 100k 1M 10M 100M
134
TIME (µs)
11279-
FREQUENCY (Hz)
11279- Figure 30. Gain Step Response vs. Time Figure 33. Offset Null Bandwidth vs. Offset Null Capacitor Rev. A | Page 10 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