Datasheet AD829 (Analog Devices) - 17
| Manufacturer | Analog Devices |
| Description | High Speed, Low Noise Video Op Amp |
| Pages / Page | 21 / 17 — AD829. Data Sheet. HIGH GAIN VIDEO BANDWIDTH, 3-OP-AMP. INSTRUMENTATION … |
| Revision | I |
| File Format / Size | PDF / 397 Kb |
| Document Language | English |
AD829. Data Sheet. HIGH GAIN VIDEO BANDWIDTH, 3-OP-AMP. INSTRUMENTATION AMPLIFIER. 3pF. (G = 20). 2pF TO 8pF. +VIN. SETTLING TIME
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AD829 Data Sheet HIGH GAIN VIDEO BANDWIDTH, 3-OP-AMP
The input amplifiers operate at a gain of 20, while the output
INSTRUMENTATION AMPLIFIER
op amp runs at a gain of 5. In this circuit, the main bandwidth Figure 48 shows a 3-op-amp instrumentation amplifier circuit limitation is the gain/bandwidth product of the output amplifier. that provides a gain of 100 at video bandwidths. At a circuit gain of Extra care should be taken while breadboarding this circuit 100, the small signal bandwidth equals 18 MHz into a FET probe. because even a couple of extra picofarads of stray capacitance at the Small signal bandwidth equals 6.6 MHz with a 50 Ω load. The compensation pins of A1 and A2 wil degrade circuit bandwidth. 0.1% settling time is 300 ns.
3pF 5 (G = 20) 2pF TO 8pF +VIN 3 SETTLING TIME A1 AC CMR ADJUST AD829 6 2 1kΩ 2kΩ 1pF 200Ω 2 RG A3 210Ω 1pF 6 200Ω AD848 3 2kΩ (G = 5) INPUT 2kΩ 5 FREQUENCY CMRR 3pF 100Hz 64.6dB 970Ω 1MHz 44.7dB 10MHz 23.9dB 2 DC CMR A2 ADJUST 6 +15V +V AD829 50Ω S PIN 7 +V 3 10µF 0.1µF 1µF 0.1µF IN 5 (G = 20) COMM EACH 3pF AMPLIFIER 10µF 0.1µF 1µF 0.1µF 4000Ω
048
CIRCUIT GAIN = + 1 5 R –15V –V G S PIN 4
00880- Figure 48. High Gain Video Bandwidth, 3-Op-Amp In-Amp Circuit Rev. I | Page 16 of 20 Document Outline Features General Description Connection Diagram Product Highlights Revision History Specifications Absolute Maximum Ratings Thermal Characteristics Metallization Photo ESD Caution Typical Performance Characteristics Test Circuits Theory of Operation Externally Compensating the AD829 Shunt Compensation Current Feedback Compensation Low Error Video Line Driver High Gain Video Bandwidth, 3-Op-Amp Instrumentation Amplifier Outline Dimensions Ordering Guide
AD829 Data Sheet HIGH GAIN VIDEO BANDWIDTH, 3-OP-AMP
The input amplifiers operate at a gain of 20, while the output
INSTRUMENTATION AMPLIFIER
op amp runs at a gain of 5. In this circuit, the main bandwidth Figure 48 shows a 3-op-amp instrumentation amplifier circuit limitation is the gain/bandwidth product of the output amplifier. that provides a gain of 100 at video bandwidths. At a circuit gain of Extra care should be taken while breadboarding this circuit 100, the small signal bandwidth equals 18 MHz into a FET probe. because even a couple of extra picofarads of stray capacitance at the Small signal bandwidth equals 6.6 MHz with a 50 Ω load. The compensation pins of A1 and A2 wil degrade circuit bandwidth. 0.1% settling time is 300 ns.
3pF 5 (G = 20) 2pF TO 8pF +VIN 3 SETTLING TIME A1 AC CMR ADJUST AD829 6 2 1kΩ 2kΩ 1pF 200Ω 2 RG A3 210Ω 1pF 6 200Ω AD848 3 2kΩ (G = 5) INPUT 2kΩ 5 FREQUENCY CMRR 3pF 100Hz 64.6dB 970Ω 1MHz 44.7dB 10MHz 23.9dB 2 DC CMR A2 ADJUST 6 +15V +V AD829 50Ω S PIN 7 +V 3 10µF 0.1µF 1µF 0.1µF IN 5 (G = 20) COMM EACH 3pF AMPLIFIER 10µF 0.1µF 1µF 0.1µF 4000Ω
048
CIRCUIT GAIN = + 1 5 R –15V –V G S PIN 4
00880- Figure 48. High Gain Video Bandwidth, 3-Op-Amp In-Amp Circuit Rev. I | Page 16 of 20 Document Outline Features General Description Connection Diagram Product Highlights Revision History Specifications Absolute Maximum Ratings Thermal Characteristics Metallization Photo ESD Caution Typical Performance Characteristics Test Circuits Theory of Operation Externally Compensating the AD829 Shunt Compensation Current Feedback Compensation Low Error Video Line Driver High Gain Video Bandwidth, 3-Op-Amp Instrumentation Amplifier Outline Dimensions Ordering Guide