AD712 Analog Devices, AD712 Datasheet
AD712
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AD712 Summary of contents
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... The superior ac and dc performance of this op amp makes it suitable for active filter applications. With a slew rate of 16 V/μs and a settling time of 1 μs to ±0.01%, the AD712 is ideal as a buffer for 12-bit digital-to-analog converters (DACs) and analog- to-digital converters (ADCs) and as a high speed integrator. ...
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... AD712 TABLE OF CONTENTS Features .............................................................................................. 1 Connection Diagram ....................................................................... 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Typical Performance Characteristics ............................................. 6 Settling Time ................................................................................... 11 Optimizing Settling Time .......................................................... 11 Op Amp Settling Time—A Mathematical Model .................. 12 REVISION HISTORY 7/10—Rev Rev. H Changes to Product Title ................................................................. 1 Added Input Voltage Noise Parameter, Input Current Noise Parameter, and Open-Loop Gain Parameter, Table 1 ...
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... AD712 Unit mV mV μV/° μV/month μV/° MHz kHz V/μs μs % Ω||pF Ω|| ...
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... A = 25°C. For higher temperatures, the current doubles every 10°C. A Rev Page AD712K Typ Max Unit 2 μV p-p 45 nV/√Hz 22 nV/√Hz 18 nV/√Hz 16 nV/√Hz 0.01 pA/√Hz 400 V/mV V/mV +13.9, −13.3 V +13.8, − ...
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... S S ESD CAUTION −65°C to +150°C −65°C to +125°C 0°C to 70°C −40°C to +85°C −55°C to +125°C 300°C = 110°C/W JA Rev Page AD712 ...
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... AD712 TYPICAL PERFORMANCE CHARACTERISTICS 2kΩ L 25° SUPPLY VOLTAGE ± V Figure 2. Input Voltage Swing vs. Supply Voltage 2kΩ L 25° SUPPLY VOLTAGE ± V Figure 3. Output Voltage Swing vs. Supply Voltage ±15V SUPPLIES 15 10 ...
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... FREQUENCY (Hz 2kΩ L 25° SUPPLY VOLTAGE ± V Figure 12. Open-Loop Gain vs. Supply Voltage + SUPPLY – SUPPLY V = ±15V SUPPLIES S WITH 1V p-p SINEWAVE 25°C 100 1k 10k 100k SUPPLY MODULATION FREQUENCY (Hz) Figure 13. Power Supply Rejection vs. Frequency AD712 100 –20 10M 20 1M ...
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... AD712 100 100 1k 10k FREQUENCY (Hz) Figure 14. Common-Mode Rejection vs. Frequency 100k 1M FREQUENCY (Hz) Figure 15. Large Signal Frequency Response 0.1% 0.01% 0 ERROR 1% 0.1% 0.01% –2 –4 –6 –8 –10 0.5 0.6 0.7 0.8 SETTLING TIME (µs) Figure 16. Output Swing and Error vs. Settling Time – ...
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... Figure 24. Unity-Gain Follower Pulse Response (Large Signal) 100 90 2.2kΩ 6 – Figure 25. Unity-Gain Follower Pulse Response (Small Signal) Rev Page 0.1µF – 1/2 OUT AD712 2kΩ 100pF 0.1µF SQUARE WAVE –V S INPUT Figure 23. Unity-Gain Follower 1µs 5V 50mV 100ns AD712 ...
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... AD712 5kΩ 0.1µF 5kΩ – 1/2 AD712 SQUARE + 4 WAVE 0.1µF INPUT –V S Figure 26. Unity-Gain Inverter 100 Figure 27. Unity-Gain Inverter Pulse Response (Large Signal) V OUT 2kΩ 100pF 1µs Rev Page 100 50mV 200ns Figure 28. Unity-Gain Inverter Pulse Response (Small Signal) ...
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... AD71x family assure 12-bit accuracy over the full operating temperature range. The excellent high speed performance of the AD712 is shown in the oscilloscope photos in Figure 29 and Figure 30. Measurements were taken using a low input capacitance amplifier connected directly to the summing junction of the AD712, and both figures show a worst-case situation: full-scale input transition. The 4 kΩ ...
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... V/μs) were chosen to be high enough to provide very fast settling time but not too high to cause a significant reduction in phase margin (and therefore, stability). Thus designed, the AD712 settles to ±0.01%, with output step, in under 1 μs, while retaining the ability to drive a 250 pF load capacitance when operating as a unity-gain follower. ...
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... The photos of Figure 35 and Figure 36 show the dynamic response of the AD712 in the settling test circuit of Figure 37. 5V 100 5mV Figure 35. Settling Characteristics +10 V Step Upper Trace: Output of AD712 Under Test (5 V/Div) Lower Trace: Amplified Error Voltage (0.01%/Div) DATA DYNAMICS ...
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... Figure 38. Board Layout for Guarding Inputs DAC CONVERTER APPLICATIONS The AD712 is an excellent output amplifier for CMOS DACs. It can be used to perform both 2-quadrant and 4-quadrant operations. The output impedance of a DAC using an inverted R-2R ladder approaches R for codes containing many 1s, and 3R for codes containing a single 1 ...
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... Figure 41 and Figure 42 show the settling time characteristics of the AD712 when used as a DAC output buffer for the AD7545. 1mV 100 Figure 41. Positive Settling Characteristics for AD712 with AD7545 1mV 100 Figure 42. Negative Settling Characteristics for AD712 with AD7545 ...
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... Load Capacitance C Figure 47 shows a typical transient response for this connection. 4.99kΩ 30pF +V IN 0.1µF + – 4.99kΩ – 1/2 INPUT AD712 TYPICAL CAPACITANCE + LIMIT FOR VARIOUS 0.1µF LOAD RESISTORS + – –V 2kΩ ...
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... The amplifier bandwidth in conjunction with the filter gain dictates the frequency response of the filter. The use of a high performance amplifier such as the AD712 minimizes both dc and ac errors in all active filter applications. SECOND-ORDER LOW-PASS FILTER Figure 48 depicts the AD712 configured as a second-order, Butterworth low-pass filter. With the values as shown, the corner frequency is 20 kHz ...
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... CHEBYCHEV FILTER Figure 50 and Figure 51 show the AD712 and its dual counterpart, the AD711 9-pole Chebychev filter using active frequency dependent negative resistors (FDNRs). With a cutoff frequency of 50 kHz and better than 90 dB rejection, it can be used as an antialiasing filter for a 12-bit data acquisition system with 100 kHz throughput ...
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... REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 54. 8-Lead Ceramic Dual In-Line Package [CERDIP] (Q-8) Dimensions shown in inches and (millimeters) Rev Page 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.430 (10.92) MAX 0.320 (8.13) 0.290 (7.37) 0.015 (0.38) 15° 0.008 (0.20) 0° AD712 ...
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... AD712JR-REEL 0°C to 70°C AD712JR-REEL7 0°C to 70°C AD712JRZ 0°C to 70°C AD712JRZ-REEL 0°C to 70°C AD712JRZ-REEL7 0°C to 70°C AD712KNZ 0°C to 70°C AD712KRZ 0°C to 70°C AD712KRZ-REEL 0°C to 70°C AD712KRZ-REEL7 0°C to 70°C AD712SQ/883B −55°C to +125° RoHS Compliant Part ...