Datasheet AD829 (Analog Devices)

High Speed, Low Noise Video Op Amp Data Sheet AD829 FEATURES CONNECTION DIAGRAM High speed OFFSET NULL 1 AD829 8 OFFSET NULL 120 MHz bandwidth, gain = −1 –IN 2 7 +VS 230 V/µs slew rate +IN 3 6 OUTPUT –V TOP VIEW 5 C 90 ns settling time to 0.1% S 4 COMP (Not to Scale) Ideal for video applications
00880-001
0.02% differential gain
Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R)
0.04° differential phase Low noise NC OFFSET NULL NC OFFSET NULL NC 3 2 1 20 19 1.7 nV/√Hz input voltage noise 1.5 pA/√Hz input current noise NC 4 18 NC +V Excellent dc precision –IN 5 17 AD829 NC 6 16 NC TOP VIEW 1 mV maximum input offset voltage (over temperature) +IN 7 (Not to Scale) 15 OUTPUT 0.3 µV/°C input offset drift NC 8 14 NC Flexible operation 9 10 11 12 13 Specified for ±5 V to ±15 V operation –V NC NC NC COMP NC = NO CONNECT C ±3 V output swing into a 150 Ω load
00880-002 Figure 2. 20-Terminal LCC
External compensation for gains 1 to 20 5 mA supply current
Operating as a traditional voltage feedback amplifier, the AD829
Available in tape and reel in accordance with EIA-481A standard
provides many of the advantages that a transimpedance amplifier 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 Ω or 75 Ω 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/µs uncompensated slew rate and 750 MHz gain bandwidth while requiring only 5 mA of current from 1. The input voltage noise of 2 nV/√Hz, current noise of power supplies. 1.5 pA/√Hz, and 50 MHz bandwidth for gains of 1 to 20 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 Ω and 75 Ω cables to ±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 excel ent 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 Ω, 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 This op amp is also useful in multichannel, high speed data range (−40°C to +125°C). 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.
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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