Datasheet AD8338 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | Low Power, 18 MHz Variable Gain Amplifier |
| Seiten / Seite | 20 / 6 — AD8338. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. GAIN = 600mV. … |
| Revision | B |
| Dateiformat / Größe | PDF / 483 Kb |
| Dokumentensprache | Englisch |
AD8338. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. GAIN = 600mV. MODE PIN LOW. MODE PIN HIGH. VGAIN = 350mV. VGAIN = 100mV. N (
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AD8338 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS
VBAT = 3.0 V, TA = 25°C, CL = 2 pF on OUTP and OUTM, RL = ∞, MODE pin high, RIN = 2 × 500 Ω, VGAIN = 0.6 V, differential operation; unless otherwise noted.
80 80 V 70 GAIN = 600mV 60 MODE PIN LOW MODE PIN HIGH 60 VGAIN = 350mV 40 50 VGAIN = 100mV B) B) 20 d d 40 N ( N ( AI AI G 0 G 30 –20 20 –40 10 0 –60 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
109 003
100k 1M 10M 100M V FREQUENCY (Hz)
1279-
GAIN (V)
1 11279- Figure 4. Gain vs. VGAIN Figure 7. Gain vs. Frequency, RIN = 50 Ω, 20 dB Steps
80 80 N = 962 VGAIN = 1100mV 70 60 VGAIN = 850mV 60 40 S T VGAIN = 600mV 50 20 HI F B) d VGAIN = 350mV R O 40 0 N ( BE AI G VGAIN = 100mV 30 –20 NUM 20 –40 10 –60 0 –80 78.0 78.3 78.6 78.9 79.2 79.5 79.8 80.1 80.4
105
100k 1M 10M 100M
107
GAIN SLOPE (dB/V)
11279-
FREQUENCY (Hz)
1279- 1 Figure 5. Gain Slope Histogram Figure 8. Gain vs. Frequency, RIN = 5 kΩ, 20 dB Steps
100 5 VS = 3V f = 1MHz V 4 80 GAIN = 1.1V VGAIN = 1.0V 3 VGAIN = 0.9V 60 VGAIN = 0.8V 2 VGAIN = 0.7V B) d VGAIN = 0.6V 1 B) 40 R ( d V –40°C GAIN = 0.5V N ( V 0 GAIN = 0.4V RRO AI +25°C 20 V G GAIN = 0.3V N E –1 VGAIN = 0.2V AI VGAIN = 0.1V G 0 –2 –3 +85°C –20 +105°C –4 –40 –5 10k 100k 1M 10M 100M
106
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
006
FREQUENCY (Hz)
1279- 1
VGAIN (V)
1279- 1 Figure 6. Gain vs. Frequency, 8 dB Steps Figure 9. Gain Error vs. VGAIN over Temperature Rev. A | Page 6 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
VBAT = 3.0 V, TA = 25°C, CL = 2 pF on OUTP and OUTM, RL = ∞, MODE pin high, RIN = 2 × 500 Ω, VGAIN = 0.6 V, differential operation; unless otherwise noted.
80 80 V 70 GAIN = 600mV 60 MODE PIN LOW MODE PIN HIGH 60 VGAIN = 350mV 40 50 VGAIN = 100mV B) B) 20 d d 40 N ( N ( AI AI G 0 G 30 –20 20 –40 10 0 –60 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
109 003
100k 1M 10M 100M V FREQUENCY (Hz)
1279-
GAIN (V)
1 11279- Figure 4. Gain vs. VGAIN Figure 7. Gain vs. Frequency, RIN = 50 Ω, 20 dB Steps
80 80 N = 962 VGAIN = 1100mV 70 60 VGAIN = 850mV 60 40 S T VGAIN = 600mV 50 20 HI F B) d VGAIN = 350mV R O 40 0 N ( BE AI G VGAIN = 100mV 30 –20 NUM 20 –40 10 –60 0 –80 78.0 78.3 78.6 78.9 79.2 79.5 79.8 80.1 80.4
105
100k 1M 10M 100M
107
GAIN SLOPE (dB/V)
11279-
FREQUENCY (Hz)
1279- 1 Figure 5. Gain Slope Histogram Figure 8. Gain vs. Frequency, RIN = 5 kΩ, 20 dB Steps
100 5 VS = 3V f = 1MHz V 4 80 GAIN = 1.1V VGAIN = 1.0V 3 VGAIN = 0.9V 60 VGAIN = 0.8V 2 VGAIN = 0.7V B) d VGAIN = 0.6V 1 B) 40 R ( d V –40°C GAIN = 0.5V N ( V 0 GAIN = 0.4V RRO AI +25°C 20 V G GAIN = 0.3V N E –1 VGAIN = 0.2V AI VGAIN = 0.1V G 0 –2 –3 +85°C –20 +105°C –4 –40 –5 10k 100k 1M 10M 100M
106
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
006
FREQUENCY (Hz)
1279- 1
VGAIN (V)
1279- 1 Figure 6. Gain vs. Frequency, 8 dB Steps Figure 9. Gain Error vs. VGAIN over Temperature Rev. A | Page 6 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