AD8532 Analog Devices, AD8532 Datasheet
AD8532
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AD8532 Summary of contents
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... ASIC input or output amplifier Headphone driver GENERAL DESCRIPTION The AD8531, AD8532, and AD8534 are single, dual, and quad rail-to-rail input and output single-supply amplifiers featuring 250 mA output drive current. This high output current makes these amplifiers excellent for driving either resistive or capacitive loads. AC performance is very good with 3 MHz bandwidth, 5 V/µ ...
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... AD8531/AD8532/AD8534 TABLE OF CONTENTS Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Electrical Characteristics............................................................. 4 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 11 Short-Circuit Protection............................................................ 11 Power Dissipation....................................................................... 11 Power Calculations for Varying or Unknown Loads............. 12 Calculating Power by Measuring Ambient and Case Temperature ................................................................................ 12 Calculating Power by Measuring Supply Current.................. 13 REVISION HISTORY 04/05— ...
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... T ≤ +85° kΩ 0.01% S GBP ф kHz kΩ kHz kHz kHz n Rev Page AD8531/AD8532/AD8534 Min Typ Max Unit ...
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... AD8531/AD8532/AD8534 ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise noted Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift Bias Current Drift Offset Current Drift ...
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... JA 2.5 – 2.0 1.5 1.0 0 100 120 140 R (Ω) LOAD = ±2 Connected to GND ( Rev Page AD8531/AD8532/AD8534 θ Unit JC 126 °C/W 146 °C/W 43 °C/W 45 °C/W 43 °C/W 36 °C/W 43 °C/W 160 180 200 ...
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... AD8531/AD8532/AD8534 TYPICAL PERFORMANCE CHARACTERISTICS 500 400 300 200 100 –12 –10 –8 –6 –4 –2 INPUT OFFSET VOLTAGE (mV) Figure 6. Input Offset Voltage Distribution 500 400 300 200 100 –12 –10 –8 –6 –4 –2 INPUT OFFSET VOLTAGE (mV) Figure 7. Input Offset Voltage Distribution – ...
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... Figure 16. Closed-Loop Output Voltage Swing vs. Frequency 135 2 180 1 0 10M 100M 1k Figure 17. Closed-Loop Output Voltage Swing vs. Frequency Rev Page AD8531/AD8532/AD8534 LOAD 25°C A 10k 100k 1M 10M FREQUENCY (Hz 2. 25° 2kΩ ...
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... AD8531/AD8532/AD8534 200 180 T = 25°C A 160 140 120 100 10k 100k 1M LOAD CURRENT (mA) Figure 18. Closed-Loop Output Impedance vs. Frequency 100 MARKER 41µV/√Hz Figure 19. Voltage Noise Density vs. Frequency 100 MARKER 25.9µV/√Hz Figure 20. Voltage Noise Density vs. Frequency ...
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... Figure 27. Small Signal Overshoot vs. Load Capacitance 10000 10 Figure 28. Small Signal Overshoot vs. Load Capacitance 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50 10000 –40 Figure 29. Supply Current per Amplifier vs. Temperature Rev Page AD8531/AD8532/AD8534 25° 600Ω L –OS +OS 100 1000 CAPACITANCE (pF 2. 25° 600Ω ...
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... AD8531/AD8532/AD8534 0. 25°C A 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 0.75 1.00 1.50 2.00 SUPPLY VOLTAGE (±V) Figure 30. Supply Current per Amplifier vs. Supply Voltage V = 1.35V 50mV 1Ω 2kΩ 300pF 25°C A 500 ns/DIV Figure 31. Small Signal Transient Response 50mV 1Ω 2kΩ 300pF 25°C ...
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... As a result of the design of the output stage for maximum load current capability, the AD8531/AD8532/AD8534 do not have any internal short-circuit protection circuitry. Direct connection of the output of the AD8531/AD8532/AD8534 to the positive supply in single-supply applications destroys the device. In those applications where some protection is needed, ...
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... The quantity within the parentheses is the maximum voltage developed across either output transistor additional design aid in calculating available load current from the AD8531/AD8532/AD8534, Figure 5 illustrates the output voltage of the AD8531/AD8532/AD8534 as a function of load resistance. POWER CALCULATIONS FOR VARYING OR T MAX = 150°C ...
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... This input current is not inherently damaging to the device, as long limited less. For the AD8531/AD8532/ AD8534, once the input voltage exceeds the supply by more than 0.6 V, the input current quickly exceeds 5 mA. If this con- dition continues to exist, an external series resistor should be added ...
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... This value is reduced to the smallest value for acceptable performance (typically, 1 µF). For the case load capacitor on the AD8531/AD8532/AD8534, the optimal snubber network Ω in series with 1 µF. The benefit is immediately apparent, as seen in the scope photo in Figure 41. The top trace was taken with load, and the bottom trace was taken with the 5 Ω ...
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... This low dropout type of reference/regulator is readily implemented with a rail- to-rail output op amp, and is particularly useful when using a higher current device such as the AD8531/AD8532/AD8534. A typical example is the 3 4.5 V reference voltage developed from system source. Generating these voltages requires a three terminal reference, such as the REF196 (3 ...
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... Automotive Applications SINGLE-SUPPLY HEADPHONE AMPLIFIER Because of its speed and large output drive, the AD8531/ AD8532/AD8534 make an excellent headphone driver, as illustrated in Figure 44. Its low supply operation and rail-to-rail inputs and outputs give a maximum signal swing on a single 5 V supply. To ensure maximum signal swing available to drive the headphone, the amplifier inputs are biased to V+/2, which in this case is 2.5 V. The 100 kΩ ...
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... Because of the high 100k Ω output current drive and low dropout voltage of the AD8531/AD8532/AD8534, the largest signal available on a single 5 V supply is approximately 4.5 V p-p into a 600 Ω transmission system. Amplifier A3 is configured as a difference amplifier for two reasons: (1) It prevents the transmit signal ...
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... AD8531/AD8532/AD8534 OUTLINE DIMENSIONS 3.10 3.00 2. 4.50 4.40 6.40 BSC 4. PIN 1 0.65 BSC 0.15 1.20 0.05 MAX 0.30 SEATING COPLANARITY 0.20 0.19 PLANE 0.10 0.09 COMPLIANT TO JEDEC STANDARDS MO-153AA Figure 47. 8-Lead Thin Shrink Small Outline Package [TSSOP] (RU-8) Dimensions shown in millimeters 5.10 5.00 4. 4.50 6.40 4.40 BSC 4. PIN 1 0.65 1.05 BSC 1.00 0.20 1.20 0.80 0.09 MAX 0.15 0.30 0.05 SEATING 0.19 COPLANARITY PLANE 0.10 COMPLIANT TO JEDEC STANDARDS MO-153AB-1 Figure 48. 14-Lead Thin Shrink Small Outline Package [TSSOP] ...
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... AD8532ARM-R2 −40°C to +85°CC AD8532ARM-REEL −40°C to +85°CC 1 AD8532ARMZ-R2 −40°C to +85°CC AD8532ARMZ-REEL 1 −40°C to +85°CC AD8532ARU −40°C to +85°C AD8532ARU-REEL −40°C to +85°C 1 AD8532ARUZ −40°C to +85°C 1 AD8532ARUZ-REEL −40°C to +85°C AD8534AR − ...
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... AD8531/AD8532/AD8534 Model Temperature Range AD8534ARU −40°C to +85°C AD8534ARU-REEL −40°C to +85°C 1 AD8534ARUZ −40°C to +85°C 1 AD8534ARUZ-REEL −40°C to +85° Pb-free part. © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...