Datasheet AD8638, AD8639 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 16V Dual Auto-Zero, Rail-to-Rail Output, Precision Amplifier |
| Páginas / Página | 20 / 1 — 16 V Auto-Zero, Rail-to-Rail Output. Operational Amplifiers. … |
| Revisión | F |
| Formato / tamaño de archivo | PDF / 638 Kb |
| Idioma del documento | Inglés |
16 V Auto-Zero, Rail-to-Rail Output. Operational Amplifiers. AD8638/AD8639. FEATURES. PIN CONFIGURATIONS
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16 V Auto-Zero, Rail-to-Rail Output Operational Amplifiers AD8638/AD8639 FEATURES PIN CONFIGURATIONS Low offset voltage: 9 μV maximum OUT 1 5 V+ Offset drift: 0.04 μV/°C maximum AD8638 Rail-to-rail output swing V– 2 TOP VIEW (Not to Scale) 5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply
01
+IN
0
3 4 –IN
5-
operation
89 06
High gain: 136 dB typical
Figure 1. 5-Lead SOT-23 (RJ-5)
High CMRR: 133 dB typical High PSRR: 143 dB typical NC 1 8 NC –IN 2 AD8638 7 V+ Very low input bias current: 40 pA maximum +IN 3 TOP VIEW 6 OUT Low supply current: 1.3 mA maximum V– (Not to Scale) 4 5 NC
02
AD8639: qualified for automotive applications
0 5-
NC = NO CONNECT
89 06
APPLICATIONS
Figure 2. 8-Lead SOIC_N (R-8)
Pressure and position sensors OUT A 1 8 V+ Strain gage amplifiers –IN A AD8639 2 7 OUT B Medical instrumentation TOP VIEW +IN A 3 6 –IN B (Not to Scale)
03
Thermocouple amplifiers
2
V–
5-
4 5 +IN B
89
Automotive sensors
06 Figure 3. 8-Lead MSOP (RM-8)
Precision references
8-Lead SOIC_N (R-8)
Precision current sensing PIN 1 GENERAL DESCRIPTION OUT A 1 INDICATOR 8 V+ –IN A 2 AD8639 7 OUT B
The AD8638/AD8639 are single and dual wide bandwidth,
+IN A 3 6 –IN B TOP VIEW v– 4 (Not to Scale) 5 +IN B
auto-zero amplifiers featuring rail-to-rail output swing and low noise. These amplifiers have very low offset, drift, and bias current. Operation is fully specified from 5 V to 16 V single
NOTES
04 2
1. PIN 4 AND THE EXPOSED PAD
5- supply (±2.5 V to ±8 V dual supply).
MUST BE CONNECTED TO V–.
689 0 Figure 4. 8-Lead LFCSP_WD (CP-8-5) The AD8638/AD8639 provide benefits previously found only in expensive zero-drift or chopper-stabilized amplifiers. Using the Analog Devices, Inc., topology, these auto-zero amplifiers The AD8638/AD8639 are specified for the extended industrial combine low cost with high accuracy and low noise. No exter- temperature range (−40°C to +125°C). The single AD8638 is nal capacitors are required. In addition, the AD8638/AD8639 available in tiny 5-lead SOT-23 and 8-lead SOIC packages. greatly reduce the digital switching noise found in most chopper- The dual AD8639 is available in 8-lead MSOP, 8-lead SOIC, and stabilized amplifiers. 8-lead LFCSP packages. See the Ordering Guide for automotive With a typical offset voltage of only 3 μV, drift of 0.01 μV/°C, grades. and noise of 1.2 μV p-p (0.1 Hz to 10 Hz), the AD8638/AD8639 The AD8638/AD8639 are members of a growing series of auto- are suited for applications in which error sources cannot be zero op amps offered by Analog Devices (see Table 1). tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift
Table 1. Auto-Zero Op Amps
over their operating temperature ranges. Many systems can take
Supply 2.7 V to 5 V 2.7 V to 5 V Low Power 5 V to 16 V
advantage of the rail-to-rail output swing provided by the Single AD8628 AD8538 AD8638 AD8638/AD8639 to maximize signal-to-noise ratio (SNR). Dual AD8629 AD8539 AD8639 Quad AD8630
Rev. F 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2007–2010 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS—5 V OPERATION ELECTRICAL CHARACTERISTICS—16 V OPERATION ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION 1/f NOISE INPUT VOLTAGE RANGE OUTPUT PHASE REVERSAL OVERLOAD RECOVERY TIME INFRARED SENSORS PRECISION CURRENT SHUNT SENSOR OUTPUT AMPLIFIER FOR HIGH PRECISION DACS OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS
16 V Auto-Zero, Rail-to-Rail Output Operational Amplifiers AD8638/AD8639 FEATURES PIN CONFIGURATIONS Low offset voltage: 9 μV maximum OUT 1 5 V+ Offset drift: 0.04 μV/°C maximum AD8638 Rail-to-rail output swing V– 2 TOP VIEW (Not to Scale) 5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply
01
+IN
0
3 4 –IN
5-
operation
89 06
High gain: 136 dB typical
Figure 1. 5-Lead SOT-23 (RJ-5)
High CMRR: 133 dB typical High PSRR: 143 dB typical NC 1 8 NC –IN 2 AD8638 7 V+ Very low input bias current: 40 pA maximum +IN 3 TOP VIEW 6 OUT Low supply current: 1.3 mA maximum V– (Not to Scale) 4 5 NC
02
AD8639: qualified for automotive applications
0 5-
NC = NO CONNECT
89 06
APPLICATIONS
Figure 2. 8-Lead SOIC_N (R-8)
Pressure and position sensors OUT A 1 8 V+ Strain gage amplifiers –IN A AD8639 2 7 OUT B Medical instrumentation TOP VIEW +IN A 3 6 –IN B (Not to Scale)
03
Thermocouple amplifiers
2
V–
5-
4 5 +IN B
89
Automotive sensors
06 Figure 3. 8-Lead MSOP (RM-8)
Precision references
8-Lead SOIC_N (R-8)
Precision current sensing PIN 1 GENERAL DESCRIPTION OUT A 1 INDICATOR 8 V+ –IN A 2 AD8639 7 OUT B
The AD8638/AD8639 are single and dual wide bandwidth,
+IN A 3 6 –IN B TOP VIEW v– 4 (Not to Scale) 5 +IN B
auto-zero amplifiers featuring rail-to-rail output swing and low noise. These amplifiers have very low offset, drift, and bias current. Operation is fully specified from 5 V to 16 V single
NOTES
04 2
1. PIN 4 AND THE EXPOSED PAD
5- supply (±2.5 V to ±8 V dual supply).
MUST BE CONNECTED TO V–.
689 0 Figure 4. 8-Lead LFCSP_WD (CP-8-5) The AD8638/AD8639 provide benefits previously found only in expensive zero-drift or chopper-stabilized amplifiers. Using the Analog Devices, Inc., topology, these auto-zero amplifiers The AD8638/AD8639 are specified for the extended industrial combine low cost with high accuracy and low noise. No exter- temperature range (−40°C to +125°C). The single AD8638 is nal capacitors are required. In addition, the AD8638/AD8639 available in tiny 5-lead SOT-23 and 8-lead SOIC packages. greatly reduce the digital switching noise found in most chopper- The dual AD8639 is available in 8-lead MSOP, 8-lead SOIC, and stabilized amplifiers. 8-lead LFCSP packages. See the Ordering Guide for automotive With a typical offset voltage of only 3 μV, drift of 0.01 μV/°C, grades. and noise of 1.2 μV p-p (0.1 Hz to 10 Hz), the AD8638/AD8639 The AD8638/AD8639 are members of a growing series of auto- are suited for applications in which error sources cannot be zero op amps offered by Analog Devices (see Table 1). tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift
Table 1. Auto-Zero Op Amps
over their operating temperature ranges. Many systems can take
Supply 2.7 V to 5 V 2.7 V to 5 V Low Power 5 V to 16 V
advantage of the rail-to-rail output swing provided by the Single AD8628 AD8538 AD8638 AD8638/AD8639 to maximize signal-to-noise ratio (SNR). Dual AD8629 AD8539 AD8639 Quad AD8630
Rev. F 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2007–2010 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS—5 V OPERATION ELECTRICAL CHARACTERISTICS—16 V OPERATION ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION 1/f NOISE INPUT VOLTAGE RANGE OUTPUT PHASE REVERSAL OVERLOAD RECOVERY TIME INFRARED SENSORS PRECISION CURRENT SHUNT SENSOR OUTPUT AMPLIFIER FOR HIGH PRECISION DACS OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS