High Speed, Low Noise Video Op Amp Data Sheet AD829 FEATURES CONNECTION DIAGRAM High speed OFFSET NULL 1 8 OFFSET NULL AD829 IN 2 7 +V S 120 MHz bandwidth, gain = 1 +IN 3 6 OUTPUT 230 V/s slew rate V 4 TOP VIEW 5 C S COMP (Not to Scale) 90 ns settling time to 0.1% Ideal for video applications Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R) 0.02% differential gain 0.04 differential phase Low noise 3 2 1 20 19 1.7 nV/Hz input voltage noise 4 18 NC NC 1.5 pA/Hz input current noise 17 +V IN 5 AD829 Excellent dc precision NC 6 16 NC TOP VIEW (Not to Scale) OUTPUT 7 15 +IN 1 mV maximum input offset voltage (over temperature) 8 14 NC NC 0.3 V/C input offset drift 9 10 11 12 13 Flexible operation Specified for 5 V to 15 V operation NC = NO CONNECT 3 V output swing into a 150 load Figure 2. 20-Terminal LCC External compensation for gains 1 to 20 Operating as a traditional voltage feedback amplifier, the AD829 5 mA supply current provides many of the advantages that a transimpedance amplifier Available in tape and reel in accordance with EIA-481A standard offer. A bandwidth >50 MHz can be maintained for a range of GENERAL DESCRIPTION gains through the replacement of the external compensation The is a low noise (1.7 nV/Hz), high speed op amp with capacitor. The AD829 and the transimpedance amplifier are both custom compensation that provides the user with gains of 1 to 20 unity-gain stable and provide similar voltage noise performance while maintaining a bandwidth >50 MHz. Its 0.04 differential (1.7 nV/Hz) however, the current noise of the AD829 phase and 0.02% differential gain performance at 3.58 MHz and (1.5 pA/Hz) is less than 10% of the noise of transimpedance 4.43 MHz, driving reverse-terminated 50 or 75 cables, makes amplifiers. The inputs of the AD829 are symmetrical. it ideally suited for professional video applications. The AD829 PRODUCT HIGHLIGHTS achieves its 230 V/s uncompensated slew rate and 750 MHz 1. The input voltage noise of 2 nV/Hz, current noise of gain bandwidth while requiring only 5 mA of current from 1.5 pA/Hz, and 50 MHz bandwidth for gains of 1 to 20 power supplies. make the AD829 an ideal preamp. The external compensation pin of the AD829 gives it 2. A differential phase error of 0.04 and a 0.02% differential exceptional versatility. For example, compensation can be gain error, at the 3.58 MHz NTSC, 4.43 MHz PAL, and selected to optimize the bandwidth for a given load and power SECAM color subcarrier frequencies, make the op amp an supply voltage. As a gain-of-2 line driver, the 3 dB bandwidth outstanding video performer for driving reverse-terminated can be increased to 95 MHz at the expense of 1 dB of peaking. 50 and 75 cables t o 1 V (at their terminated end). Its output can also be clamped at its external compensation pin. 3. The AD829 can drive heavy capacitive loads. The AD829 exhibits excellent dc performance. It offers a minimum 4. Performance is fully specified for operation from 5 V open-loop gain of 30 V/mV into loads as low as 500 , a low input to 15 V supplies. voltage noise of 1.7 nV/Hz, and a low input offset voltage of 1 mV 5. The AD829 is available in PDIP, CERDIP, and small outline maximum. Common-mode rejection and power supply rejection packages. Chips and MIL-STD-883B parts are also available. ratios are both 120 dB. The 8-lead SOIC is available for the extended temperature range (40C to +125C). This op amp is also useful in multichannel, high speed data conversion where its fast (90 ns to 0.1%) settling time is important. In such applications, the AD829 serves as an input buffer for 8-bit to 10-bit ADCs and as an output I/V converter for high speed DACs. Rev. I Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. NC NC OFFSET V NULL NC NC OFFSET C COMP NULL NC NC 00880-002 00880-001 % AD829 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Test Circuits ..................................................................................... 11 General Description ......................................................................... 1 Theory of Operation ...................................................................... 12 Connection Diagram ....................................................................... 1 Externally Compensating the AD829 ...................................... 12 Product Highlights ........................................................................... 1 Shunt Compensation ................................................................. 12 Revision History ............................................................................... 2 Current Feedback Compensation ............................................ 13 Specifications ..................................................................................... 3 Low Error Video Line Driver ................................................... 15 Absolute Maximum Ratings ............................................................ 5 High Gain Video Bandwidth, 3-Op-Amp Instrumentation Amplifier ..................................................................................... 16 Thermal Characteristics .............................................................. 5 Outline Dimensions ....................................................................... 17 Metallization Photo ...................................................................... 5 Ordering Guide .......................................................................... 19 ESD Caution .................................................................................. 5 Typical Performance Characteristics ............................................. 6 REVISION HISTORY 10/11Rev. H to Rev. I 2/03Rev. E to Rev. F Change to Table 2 ............................................................................. 5 Renumbered Figures ......................................................... Universal Changes to Product Highlights ....................................................... 1 4/09Rev. G to Rev. H Changes to Specifications ................................................................. 2 C hanges to Features .......................................................................... 1 Changes to Absolute Maximum Ratings ........................................ 4 Changes to Quiescent Current Parameter, Table 1 ...................... 4 Changes to Ordering Guide ............................................................. 4 C hanges to Table 2 ............................................................................ 5 Updated Outline Dimensions ....................................................... 13 A dded Thermal Characteristics Section and Table 3 .................. 5 Updated Outline Dimensions ....................................................... 17 C hanges to Ordering Guide .......................................................... 19 4/ 04Rev. F to Rev. G Added Figure 1 Renumbered Sequentially .................................. 4 C hanges to Ordering Guide ............................................................ 5 Updated Table I ............................................................................... 11 U pdated Figure 15 .......................................................................... 12 U pdated Figure 16 .......................................................................... 13 Updated Outline Dimensions ....................................................... 14 Rev. I Page 2 of 20