AD8542 Analog Devices, AD8542 Datasheet

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AD8542

Manufacturer Part Number
AD8542
Description
Dual Rail-to-Rail Input and Output, Single Supply Amplifier Featuring Very Low Supply Current
Manufacturer
Analog Devices
Datasheet

Specifications of AD8542

Vcc-vee
2.7V to 5.5V
Isy Per Amplifier
65µA
Packages
SOIC,SOP
-3db Bandwidth
1MHz
Slew Rate
0.92V/µs
Vos
1mV
Ib
4pA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
40nV/rtHz
Case
SOP-8L

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FEATURES
Single-supply operation: 2.7 V to 5.5 V
Low supply current: 45 μA/amplifier
Wide bandwidth: 1 MHz
No phase reversal
Low input currents: 4 pA
Unity gain stable
Rail-to-rail input and output
APPLICATIONS
ASIC input or output amplifiers
Sensor interfaces
Piezoelectric transducer amplifiers
Medical instrumentations
Mobile communications
Audio outputs
Portable systems
GENERAL DESCRIPTION
The AD8541/AD8542/AD8544 are single, dual, and quad rail-
to-rail input and output single-supply amplifiers featuring very
low supply current and 1 MHz bandwidth. All are guaranteed to
operate from a 2.7 V single supply as well as a 5 V supply. These
parts provide 1 MHz bandwidth at a low current consumption
of 45 μA per amplifier.
Very low input bias currents enable the AD8541/AD8542/AD8544
to be used for integrators, photodiode amplifiers, piezoelectric
sensors, and other applications with high source impedance.
The supply current is only 45 μA per amplifier, ideal for battery
operation.
Rail-to-rail inputs and outputs are useful to designers buffering
ASICs in single-supply systems. The AD8541/AD8542/AD8544
are optimized to maintain high gains at lower supply voltages,
making them useful for active filters and gain stages.
The AD8541/AD8542/AD8544 are specified over the extended
industrial temperature range (–40°C to +125°C). The AD8541
is available in 8-lead SOIC, 5-lead SC70, and 5-lead SOT-23
packages. The AD8542 is available in 8-lead SOIC, 8-lead
MSOP, and 8-lead TSSOP surface-mount packages. The
AD8544 is available in 14-lead narrow SOIC and 14-lead
TSSOP surface-mount packages. All MSOP, SC70, and SOT
versions are available in tape and reel only.
Rev. E
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
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Figure 3. 8-Lead SOIC, 8-Lead MSOP, and 8-Lead TSSOP
AD8541/AD8542/AD8544
General-Purpose CMOS
Figure 4. 14-Lead SOIC and 14-Lead TSSOP
Figure 1. 5-Lead SC70 and 5-Lead SOT-23
OUT A
OUT B
OUT A
–IN A
+IN A
+IN B
–IN B
Rail-to-Rail Amplifiers
–IN A
+IN A
PIN CONFIGURATIONS
–IN A
+IN A
V+
V–
OUT A
NC
+IN A
V–
1
2
3
4
5
6
7
(R, RM, and RU Suffixes)
V–
1
2
3
4
NC = NO CONNECT
Figure 2. 8-Lead SOIC
1
©2007 Analog Devices, Inc. All rights reserved.
2
3
4
(KS and RJ Suffixes)
(R and RU Suffixes)
1
2
3
AD8541
AD8544
AD8541
(R Suffix)
AD8542
8
7
6
5
5
4 –IN A
V+
8
7
6
5
14
13
12
11
10
NC
V+
OUT A
NC
9
8
V+
OUT B
–IN B
+IN B
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
www.analog.com

Related parts for AD8542

AD8542 Summary of contents

Page 1

... The AD8541/AD8542/AD8544 are specified over the extended industrial temperature range (–40°C to +125°C). The AD8541 is available in 8-lead SOIC, 5-lead SC70, and 5-lead SOT-23 packages. The AD8542 is available in 8-lead SOIC, 8-lead MSOP, and 8-lead TSSOP surface-mount packages. The AD8544 is available in 14-lead narrow SOIC and 14-lead TSSOP surface-mount packages ...

Page 2

... AD8541/AD8542/AD8544 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution.................................................................................. 6 REVISION HISTORY 1/07—Rev Rev. E Updated Format..................................................................Universal Changes to Photodiode Application Section .............................. 14 Changes to Ordering Guide .......................................................... 17 8/04—Rev Rev. D Changes to Ordering Guide ............................................................ 5 Changes to Figure 3 ...

Page 3

... OUT V PSRR –40°C ≤ T ≤ +125° –40°C ≤ T ≤ +125° 100 kΩ 0. step) S GBP Φ kHz kHz Rev Page AD8541/AD8542/AD8544 Min Typ Max Unit 100 pA 1000 pA 0 500 100 500 V/mV 50 V/mV 2 V/mV 4 μ ...

Page 4

... AD8541/AD8542/AD8544 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 OUTPUT CHARACTERISTICS Output Voltage High ...

Page 5

... OUT V PSRR –40°C ≤ T ≤ +125° –40°C ≤ T ≤ +125° 100 kΩ 200 distortion 0. step) S GBP Φ kHz kHz Rev Page AD8541/AD8542/AD8544 Min Typ Max Unit 100 pA 1000 pA 0 500 V/mV 10 V/mV 2 V/mV 4 μV/°C 100 fA/° ...

Page 6

... AD8541/AD8542/AD8544 ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage ( Input Voltage 1 Differential Input Voltage Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) 1 For supplies less than 6 V, the differential input voltage is equal to ±V Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...

Page 7

... COMMON-MODE VOLTAGE (V) Figure 7. Input Bias Current vs. Common-Mode Voltage 2. 25°C A 1.5 2.5 3.5 4.5 85 105 125 145 3.5 4.5 5.5 Rev Page AD8541/AD8542/AD8544 400 V = 2.7V AND 350 CM S 300 250 200 150 100 50 0 –40 – TEMPERATURE (°C) Figure 8 ...

Page 8

... AD8541/AD8542/AD8544 10k 25° 100 SOURCE 10 SINK 1 0.1 0.01 0.001 0.01 0.1 1 LOAD CURRENT (mA) Figure 11. Output Voltage to Supply Rail vs. Load Current 3.0 2.5 2.0 1.5 1.0 0 10k 100k FREQUENCY (Hz) Figure 12. Closed-Loop Output Voltage Swing vs. Frequency 2.7V S ∞ 25° 100 CAPACITANCE (pF) Figure 13 ...

Page 9

... Figure 21. Output Voltage to Supply Rail vs. Frequency 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 10M 1k Figure 22. Closed-Loop Output Voltage Swing vs. Frequency Rev Page AD8541/AD8542/AD8544 = 25°C A 10k 100k 1M FREQUENCY (Hz 25°C A SOURCE SINK 0.01 0 LOAD CURRENT (mA ...

Page 10

... AD8541/AD8542/AD8544 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 10k 100k FREQUENCY (Hz) Figure 23. Closed-Loop Output Voltage Swing vs. Frequency 10kΩ 25° 100 CAPACITANCE (pF) Figure 24. Small Signal Overshoot vs. Load Capacitance 2kΩ 25° 100 CAPACITANCE (pF) Figure 25. Small Signal Overshoot vs. Load Capacitance 4.9V p-p ...

Page 11

... Figure 32. Supply Current per Amplifier vs. Temperature 1000 10kΩ L 900 25°C 800 A 700 600 500 400 300 200 100 20µ Figure 33. Closed-Loop Output Impedance vs. Frequency Rev Page AD8541/AD8542/AD8544 2.7V S –35 – 105 125 TEMPERATURE (° 2.7V AND 25°C A 10k 100k 1M 10M FREQUENCY (Hz) ...

Page 12

... AD8541/AD8542/AD8544 THEORY OF OPERATION NOTES ON THE AD854x AMPLIFIERS The AD8541/AD8542/AD8544 amplifiers are improved performance, general-purpose operational amplifiers. Performance has been improved over previous amplifiers in several ways. Lower Supply Current for 1 MHz Gain Bandwidth The AD854x series typically uses 45 μA of current per amplifier. ...

Page 13

... The AD854x have very high open-loop gain (especially with a supply voltage below 4 V), which makes it useful for active filters of all types. For example, Figure 35 illustrates the AD8542 in the classic twin-T notch filter design. The twin-T notch is desired for simplicity, low output impedance, and minimal use of op amps ...

Page 14

... AD8541/AD8542/AD8544 PHOTODIODE APPLICATION The AD854x family has very high impedance with an input bias current typically around 4 pA. This characteristic allows the AD854x op amps to be used in photodiode applications and other applications that require high input impedance. Note that the AD854x has significant voltage offset that can be removed by capacitive coupling or software calibration ...

Page 15

... COMPLIANT TO JEDEC STANDARDS MS-012-AB CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 43. 14-Lead Standard Small Outline Package [SOIC_N] Rev Page AD8541/AD8542/AD8544 5.10 5.00 4.90 8 6.40 BSC 7 0 ...

Page 16

... AD8541/AD8542/AD8544 3.20 3.00 2.80 5. 3.20 4.90 3.00 4.65 2. PIN 1 0.65 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.38 0.23 0.00 0.22 0.08 SEATING COPLANARITY PLANE 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 44. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters ...

Page 17

... AD8541ART-REEL AD8541ART-REEL7 1 AD8541ARTZ-R2 1 AD8541ARTZ-REEL 1 AD8541ARTZ-REEL7 AD8542AR AD8542AR-REEL AD8542AR-REEL7 1 AD8542ARZ 1 AD8542ARZ-REEL 1 AD8542ARZ-REEL7 AD8542ARM-R2 AD8542ARM-REEL 1 AD8542ARMZ-R2 AD8542ARMZ-REEL 1 AD8542ARU AD8542ARU-REEL 1 AD8542ARUZ 1 AD8542ARUZ-REEL AD8544AR AD8544AR-REEL AD8544AR-REEL7 1 AD8544ARZ 1 AD8544ARZ-REEL 1 AD8544ARZ-REEL7 AD8544ARU AD8544ARU-REEL AD8544ARUZ 1 1 AD8544ARUZ-REEL Pb-free part; # denotes lead-free product, may be top or bottom marked. Temperature Range Package Description – ...

Page 18

... AD8541/AD8542/AD8544 NOTES Rev Page ...

Page 19

... NOTES AD8541/AD8542/AD8544 Rev Page ...

Page 20

... AD8541/AD8542/AD8544 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00935-0-1/07(E) Rev Page ...

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