AD8631ART Analog Devices Inc, AD8631ART Datasheet

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AD8631ART

Manufacturer Part Number
AD8631ART
Description
Manufacturer
Analog Devices Inc
Datasheet

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GENERAL DESCRIPTION
The AD8631 brings precision and bandwidth to the SOT-23-5
package at single supply voltages as low as 1.8 V and low supply
current. The small package makes it possible to place the AD8631
next to sensors, reducing external noise pickup.
The AD8631 and AD8632 are rail-to-rail input and output bipolar
amplifiers with a gain bandwidth of 4 MHz and typical voltage
offset of 0.8 mV from a 1.8 V supply. The low supply current and
the low supply voltage makes these parts ideal for battery-powered
applications. The 3 V/µs slew rate makes the AD8631/AD8632 a
good match for driving ASIC inputs, such as voice codecs.
The AD8631/AD8632 is specified over the extended industrial
(–40 C to +125 C) temperature range. The AD8631 single is
available in 5-lead SOT-23 surface-mount packages. The dual
AD8632 is available in 8-lead SOIC and µSOIC packages.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
APPLICATIONS
FEATURES
Single Supply Operation: 1.8 V to 6 V
Space-Saving SOT-23, SOIC Packaging
Wide Bandwidth: 5 MHz @ 5 V, 4 MHz @ 1.8 V
Low Offset Voltage: 4 mV Max, 0.8 mV typ
Rail-to-Rail Input and Output Swing
2 V/ s Slew Rate @ 1.8 V
Only 225 A Supply Current @ 1.8 V
Portable Communications
Portable Phones
Sensor Interface
Active Filters
PCMCIA Cards
ASIC Input Drivers
Wearable Computers
Battery-Powered Devices
New Generation Phones
Personal Digital Assistants
Low Power Operational Amplifiers
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
1.8 V, 5 MHz Rail-to-Rail
PIN CONFIGURATIONS
OUT A
OUT A
OUT A
–IN A
+IN A
+IN A
–IN A
+IN A
World Wide Web Site: http://www.analog.com
V–
V–
V–
5-Lead SOT-23
8-Lead SOIC
1
2
3
4
8-Lead SOIC
1
2
3
(RM Suffix)
(RT Suffix)
(R Suffix)
AD8631/AD8632
AD8631
AD8632
1
4
AD8632
8
5
5
4 –IN A
8
7
6
5
© Analog Devices, Inc., 2000
V+
OUT B
V+
OUT B
–IN B
+IN B
V+
–IN B
+IN B

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AD8631ART Summary of contents

Page 1

... SOT-23 surface-mount packages. The dual AD8632 is available in 8-lead SOIC and µSOIC packages. REV. 0 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 which may result from its use ...

Page 2

AD8631/AD8632–SPECIFICATIONS ELECTRICAL CHARACTERISTICS 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 OUTPUT CHARACTERISTICS Output Voltage Swing High Output Voltage Swing Low ...

Page 3

ELECTRICAL CHARACTERISTICS Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain OUTPUT CHARACTERISTICS Output Voltage Swing High Output Voltage Swing Low POWER SUPPLY Supply Current/Amplifier DYNAMIC PERFORMANCE Slew ...

Page 4

AD8631/AD8632–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain OUTPUT CHARACTERISTICS Output Voltage Swing High Output Voltage Swing Low POWER SUPPLY Power Supply Rejection Ratio ...

Page 5

... Exposure to absolute maximum rating condi- tions for extended periods may affect device reliability. 2 For supply voltages less than 6 V the input voltage is limited to the supply voltage. Model AD8631ART AD8632AR AD8632ARM NOTES 1 Available in 3,000-piece reels only. ...

Page 6

Typical Characteristics AD8631/AD8632 500 450 400 350 300 250 200 TEMPERATURE – C Figure 3. Supply Current per Amplifier vs. Temperature 150 ...

Page 7

PSRR 100 120 10 100 1k 10k FREQUENCY – Hz Figure 9. PSRR vs. Frequency 2. ...

Page 8

... The AD863x is a rail-to-rail operational amplifier that can operate at supply voltages as low as 1.8 V. This family is fabricated using Analog Devices’ high-speed complementary bipolar process, also called XFCB. The process trench isolates each transistor to mini- mize parasitic capacitance, thereby allowing high-speed perfor- mance ...

Page 9

ESD ESD I2 R9 R10 Table I. Typical Battery Life Voltage Range Nominal Battery Voltage (V) Lead-Acid 2 Lithium 2.6–3.6 NiMH 1.2 NiCd ...

Page 10

AD8631/AD8632 DRIVING CAPACITIVE LOADS Capacitive Load vs. Gain Most amplifiers have difficulty driving capacitance due to degra- dation of phase margin caused by additional phase lag from the capacitive load. Higher capacitance at the output can increase the amount of ...

Page 11

Table II. Snubber Network Values for Large Capacitive Loads C Rx LOAD 300 Ω 600 pF 300 Ω Ω TOTAL HARMONIC DISTORTION + NOISE The AD863x family offers a low total harmonic distortion, which makes ...

Page 12

... SPICE Model The SPICE model for the AD8631 amplifier is available and can be downloaded from the Analog Devices’ web site at http://www.analog.com. The macro-model accurately simulates a number of AD8631 parameters, including offset voltage, input R2 common-mode range, and rail-to-rail output swing. The output ...

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