AD8644 Analog Devices, AD8644 Datasheet
AD8644
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AD8644 Summary of contents
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... AD8614/AD8644 an ideal choice for LCD applications. The AD8614 and AD8644 are specified over the temperature range of –20°C to +85°C. They are available in 5-lead SOT-23, 14-lead TSSOP, and 14-lead SOIC surface-mount packages in tape and reel ...
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... AD8614/AD8644 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution.................................................................................. 4 Typical Performance Characteristics ............................................. 5 Theory of Operation ........................................................................ 9 REVISION HISTORY 9/07—Rev Rev B Change to Current Noise Density in Table 1 ................................ 3 12/06—Rev Rev. A Updated Format..................................................................Universal Deleted SPICE Model Availability Section ...
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... V to ±9. −20°C ≤ T ≤ +85° 200 pF L GBP Φo t 0.01 step kHz kHz kHz n Rev Page AD8614/AD8644 Min Typ Max Unit 1.0 2 400 nA 500 nA 5 100 nA 200 ...
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... AD8614/AD8644 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Input Voltage Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range (Soldering, 60 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...
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... 40pF 25° 10k 100k 1M FREQUENCY (Hz) Figure 6. Open-Loop Gain and Phase Shift vs. Frequency 1k 10k 0.01% 0.01% 2.5 3.0 3 135 180 10M 100M Rev Page AD8614/AD8644 7 2kΩ 6 200pF 5 25°C A 4.5 3.5 2.5 1.5 0.5 –0.5 –1.5 –2.5 TIME (1µs/DIV) Figure 7. Large Signal Transient Response, V ...
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... AD8614/AD8644 10k 5V ≤ V ≤ 18V 25° 100 SINK 10 1 0.001 0.01 0.1 1 LOAD CURRENT (mA) Figure 10. Output Voltage to Supply Rail vs. Load Current 1000 T = 25°C A 900 800 700 600 500 400 300 200 100 SUPPLY VOLTAGE (±V) Figure 11. Supply Current vs. Supply Voltage ...
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... V Figure 20. Common-Mode Rejection vs. Frequency S 100 10M 100 Figure 21. Power Supply Rejection vs. Frequency Rev Page AD8614/AD8644 ≤ 18V S = 25°C 10k 100k 1M 10M FREQUENCY (Hz) Figure 19. Closed-Loop Gain vs. Frequency ≤ 18V S = 25°C 1k 10k 100k 1M FREQUENCY (Hz) ...
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... AD8614/AD8644 2kΩ 200pF 25° SUPPLY VOLTAGE (V) Figure 22. Slew Rate vs. Supply Voltage 100 100 FREQUENCY (Hz) Figure 23. Voltage Noise Density vs. Frequency, V SR+ SR– 25° 10k ...
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... XFCB) process. This process includes trench-isolated transistors that lower parasitic capacitance. Figure 26 shows a simplified schematic of the AD8614/AD8644. The input stage is rail-to-rail, consisting of two complementary differential pairs, one NPN pair and one PNP pair. The input stage is protected against avalanche breakdown by two back-to- back diodes. Each input has a 1.5 kΩ ...
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... This resistance should be placed in series with either or both inputs if they are subjected to the overvoltages. OUTPUT PHASE REVERSAL The AD8614/AD8644 are immune to phase reversal as long as the input voltage is limited to within the supply rails. Although the device’s output does not change phase, large currents due to input overvoltage can result, damaging the device ...
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... V OUT A ONE-CHIP HEADPHONE/MICROPHONE C L PREAMPLIFIER SOLUTION Because of its high output current performance, the AD8644 makes an excellent amplifier for driving an audio output jack in a computer application. Figure 30 shows how the AD8644 can be interfaced with an ac codec to drive headphones or speakers. AV VREFOUT , LINE_OUT_L ...
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... Input coupling capacitors are not required for either circuit as the reference voltage is supplied from the AD1881A. The resistors R4 and R5 help protect the AD8644 output in case the output jack or headphone wires are accidentally shorted to ground. The output coupling capacitors C1 and C2 block dc current from the headphones and create a high-pass filter with a ...
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... BSC 1.75 (0.0689) 8° 1.35 (0.0531) 0° SEATING 0.51 (0.0201) 0.25 (0.0098) PLANE 0.31 (0.0122) 0.17 (0.0067) COMPLIANT TO JEDEC STANDARDS MS-012-AB Figure 35. 14-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-14) Dimensions shown in millimeters and (inches) Rev Page AD8614/AD8644 5.10 5.00 4.90 8 6.40 BSC 1 7 0.65 BSC 0.20 1.20 0.09 MAX 8° 0.30 0° SEATING ...
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... AD8644AR-REEL7 –20°C to +85°C AD8644ARZ 1 –20°C to +85°C 1 AD8644ARZ-REEL –20°C to +85°C 1 AD8644ARZ-REEL7 –20°C to +85°C AD8644ARU –20°C to +85°C AD8644ARU-REEL –20°C to +85°C 1 AD8644ARUZ –20°C to +85°C 1 AD8644ARUZ-REEL –20°C to +85° RoHS Compliant Part. ...
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... NOTES Rev Page AD8614/AD8644 ...
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... AD8614/AD8644 NOTES ©1999–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06485-0-9/07(B) Rev Page ...