Datasheet AD8338 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Low Power, 18 MHz Variable Gain Amplifier |
| Pages / Page | 20 / 8 — AD8338. Data Sheet. –10. GAIN = 1, OFSN DISABLED. –20. 100. –30. GAIN = … |
| Revision | B |
| File Format / Size | PDF / 483 Kb |
| Document Language | English |
AD8338. Data Sheet. –10. GAIN = 1, OFSN DISABLED. –20. 100. –30. GAIN = 10, OFSN DISABLED. –40. GAIN = 100, OFSN DISABLED. –50. RR (
Model Line for this Datasheet
Text Version of Document
AD8338 Data Sheet 0 1k –10 GAIN = 1, OFSN DISABLED –20 100 –30 GAIN = 10, OFSN DISABLED z) –40 B) H GAIN = 100, OFSN DISABLED d V/ –50 10 RR ( GAIN = 1000, OFSN ENABLED CM –60 ISE (n O N GAIN = 10000, OFSN ENABLED –70 0dB 1 –80 20dB 40dB –90 60dB 80dB –100 0.1 10k 100k 1M 10M
15 1
10k 100k 1M 10M 100M
117
FREQUENCY (Hz)
1279- 1
FREQUENCY (Hz)
11279- Figure 16. CMRR vs. Frequency over Gain, Offset Null On, Figure 19. Input Referred Noise vs. Frequency Referred to Input
100k 0 HD2, 1kΩ VOUT = 0.5V p-p HD3, 1kΩ –10 HD2, 10kΩ HD3, 10kΩ –20 Bc) +85°C d 10k N ( z) –30 IO H V/ RT –40 O T S ISE (n –50 O +25°C C DI N 1k NI O –60 –70 –40°C HARM –80 100 –90 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
017
50k 500k 5M
118
VGAIN (V)
11279-
FREQUENCY (Hz)
11279- Figure 17. Output Referred Noise vs. VGAIN Figure 20. Harmonic Distortion vs. Frequency
1k 0 –10 Bc) –20 d 100 N ( z) IO –30 H RT V/ O T –40 S HD3 ISE (n O C DI +25°C N +85°C –50 NI 10 HD2 O –60 HARM –70 –40°C 1 –80 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
119
0.5 1.0 1.5 2.0 2.5 3.0
120
VGAIN (V) V
11279-
OUT (V p-p)
11279- Figure 18. Input Referred Noise vs. VGAIN Figure 21. Harmonic Distortion vs. Output Amplitude Rev. A | Page 8 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
15 1
10k 100k 1M 10M 100M
117
FREQUENCY (Hz)
1279- 1
FREQUENCY (Hz)
11279- Figure 16. CMRR vs. Frequency over Gain, Offset Null On, Figure 19. Input Referred Noise vs. Frequency Referred to Input
100k 0 HD2, 1kΩ VOUT = 0.5V p-p HD3, 1kΩ –10 HD2, 10kΩ HD3, 10kΩ –20 Bc) +85°C d 10k N ( z) –30 IO H V/ RT –40 O T S ISE (n –50 O +25°C C DI N 1k NI O –60 –70 –40°C HARM –80 100 –90 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
017
50k 500k 5M
118
VGAIN (V)
11279-
FREQUENCY (Hz)
11279- Figure 17. Output Referred Noise vs. VGAIN Figure 20. Harmonic Distortion vs. Frequency
1k 0 –10 Bc) –20 d 100 N ( z) IO –30 H RT V/ O T –40 S HD3 ISE (n O C DI +25°C N +85°C –50 NI 10 HD2 O –60 HARM –70 –40°C 1 –80 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
119
0.5 1.0 1.5 2.0 2.5 3.0
120
VGAIN (V) V
11279-
OUT (V p-p)
11279- Figure 18. Input Referred Noise vs. VGAIN Figure 21. Harmonic Distortion vs. Output Amplitude Rev. A | Page 8 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
