AD8638ARJZ-R2 Analog Devices Inc, AD8638ARJZ-R2 Datasheet

AD8638ARJZ-R2

Manufacturer Part Number

AD8638ARJZ-R2

Description

IC OPAMP CHOPPER R-R SOT23-5

Manufacturer

Analog Devices Inc

Datasheets

1.AD8639ACPZ-REEL7.pdf (20 pages)

2.AD8638ARZ.pdf (20 pages)

Specifications of AD8638ARJZ-R2

Slew Rate

2 V/µs

Amplifier Type

Chopper (Zero-Drift)

Number Of Circuits

Output Type

Rail-to-Rail

Gain Bandwidth Product

1.5MHz

Current - Input Bias

1pA

Voltage - Input Offset

3µV

Current - Supply

1.25mA

Current - Output / Channel

37mA

Voltage - Supply, Single/dual (±)

5 V ~ 16 V, ±2.5 V ~ 8 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

SOT-23-5, SC-74A, SOT-25

Op Amp Type

Wideband

No. Of Amplifiers

Bandwidth

1.5MHz

Supply Voltage Range

5V To 16V

Amplifier Case Style

SOT-23

No. Of Pins

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

-3db Bandwidth

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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FEATURES

Low offset voltage: 9 μV maximum

Offset drift: 0.04 μV/°C maximum

Rail-to-rail output swing

5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply

High gain: 136 dB typical

High CMRR: 133 dB typical

High PSRR: 143 dB typical

Very low input bias current: 40 pA maximum

Low supply current: 1.3 mA maximum

AD8639: qualified for automotive applications

APPLICATIONS

Pressure and position sensors

Strain gage amplifiers

Medical instrumentation

Thermocouple amplifiers

Automotive sensors

Precision references

Precision current sensing

GENERAL DESCRIPTION

The AD8638/AD8639 are single and dual wide bandwidth,

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

supply (±2.5 V to ±8 V dual supply).

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

combine low cost with high accuracy and low noise. No exter-

nal capacitors are required. In addition, the AD8638/AD8639

greatly reduce the digital switching noise found in most chopper-

stabilized amplifiers.

With a typical offset voltage of only 3 μV, drift of 0.01 μV/°C,

and noise of 1.2 μV p-p (0.1 Hz to 10 Hz), the AD8638/AD8639

are suited for applications in which error sources cannot be

tolerated. Position and pressure sensors, medical equipment,

and strain gage amplifiers benefit greatly from nearly zero drift

over their operating temperature ranges. Many systems can take

advantage of the rail-to-rail output swing provided by the

AD8638/AD8639 to maximize signal-to-noise ratio (SNR).

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

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.

operation

16 V Auto-Zero, Rail-to-Rail Output

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The AD8638/AD8639 are specified for the extended industrial

temperature range (−40°C to +125°C). The single AD8638 is

available in tiny 5-lead SOT-23 and 8-lead SOIC packages.

The dual AD8639 is available in 8-lead MSOP, 8-lead SOIC, and

8-lead LFCSP packages. See the Ordering Guide for automotive

grades.

The AD8638/AD8639 are members of a growing series of auto-

zero op amps offered by Analog Devices (see Table 1).

Table 1. Auto-Zero Op Amps

Supply

Single

Dual

Quad

2.7 V to 5 V

AD8628

AD8629

AD8630

OUT A

NOTES

1. PIN 4 AND THE EXPOSED PAD

Operational Amplifiers

–IN A

+IN A

Figure 4. 8-Lead LFCSP_WD (CP-8-5)

OUT A

MUST BE CONNECTED TO V–.

PIN CONFIGURATIONS

–IN A

+IN A

v–

OUT

–IN

+IN

Figure 1. 5-Lead SOT-23 (RJ-5)

V–

Figure 3. 8-Lead MSOP (RM-8)

+IN

Figure 2. 8-Lead SOIC_N (R-8)

V–

NC = NO CONNECT

8-Lead SOIC_N (R-8)

(Not to Scale)

2.7 V to 5 V Low Power

AD8538

AD8539

(Not to Scale)

AD8638

TOP VIEW

AD8638

TOP VIEW

AD8639

TOP VIEW

AD8639

TOP VIEW

PIN 1

INDICATOR

AD8638/AD8639

V+

OUT

8 V+

7 OUT B

6 –IN B

5 +IN B

V+

–IN

V+

OUT B

–IN B

+IN B

www.analog.com

5 V to 16 V

AD8638

AD8639

Related parts for AD8638ARJZ-R2

AD8638ARJZ-R2 Summary of contents

Page 1

FEATURES Low offset voltage: 9 μV maximum Offset drift: 0.04 μV/°C maximum Rail-to-rail output swing single-supply or ±2 ±8 V dual-supply operation High gain: 136 dB typical High CMRR: 133 dB typical High ...

Page 2

AD8638/AD8639 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics—5 V Operation................................ 3 Electrical Characteristics—16 V Operation ............................. 4 Absolute Maximum Ratings ............................................................ ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS—5 V OPERATION / 25°C, unless otherwise noted Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode ...

Page 4

AD8638/AD8639 ELECTRICAL CHARACTERISTICS—16 V OPERATION / 25°C, unless otherwise noted Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Input Voltage 1 Input Current 2 Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) 1 Input pins have ...

Page 6

AD8638/AD8639 TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. A 1400 ≤ V ≤ +3V CM 1200 1000 800 600 400 200 0 –10 – (µV) OS Figure 5. Input Offset Voltage ...

Page 7

T = 25°C, unless otherwise noted. A 100 TEMPERATURE (°C) Figure 11. Input Bias Current vs. Temperature 10k V = ±2. 100 V – 0.1 0.001 0.01 ...

Page 8

AD8638/AD8639 T = 25°C, unless otherwise noted. A 120 100 PHASE GAIN 20 0 –20 –40 –60 – ±2. 2kΩ –100 L –120 1k 10k 100k FREQUENCY (Hz) Figure 17. Open-Loop Gain ...

Page 9

T = 25°C, unless otherwise noted. A 140 120 100 100 1k 10k 100k FREQUENCY (Hz) Figure 23. CMRR vs. Frequency 120 100 80 PSRR+ 60 PSRR– –20 10 100 1k 10k ...

Page 10

AD8638/AD8639 T = 25°C, unless otherwise noted ±2. 200pF 10kΩ L TIME (2µs/DIV) Figure 29. Large Signal Transient Response V = ±2. ...

Page 11

T = 25°C, unless otherwise noted ±2. –100 V 0.05 INPUT VOLTAGE 0 –0.05 OUTPUT VOLTAGE TIME (10µs/DIV) Figure 35. Positive Overload Recovery INPUT ERROR BAND OUTPUT TIME (4µs/DIV) Figure 36. Positive ...

Page 12

AD8638/AD8639 T = 25°C, unless otherwise noted ±2.5V SY 100 100 FREQUENCY (Hz) Figure 41. Voltage Noise Density vs. Frequency 1 ±2.5V SY 1.0 0.5 0 –0.5 –1.0 –1 ...

Page 13

T = 25°C, unless otherwise noted ± –10 V –20 –40 –60 –80 –100 –120 –140 100 1k FREQUENCY (Hz) Figure 47. Channel Separation vs. Frequency 0 ± ...

Page 14

AD8638/AD8639 THEORY OF OPERATION The AD8638/AD8639 are single-supply and dual-supply, ultrahigh precision, rail-to-rail output operational amplifiers. The typical offset voltage of 3 μV allows the amplifiers to be easily configured for high gains without risk of excessive output voltage errors. ...

Page 15

INFRARED SENSORS Infrared (IR) sensors, particularly thermopiles, are increasingly used in temperature measurement for applications as wide ranging as automotive climate control, human ear thermometers, home insulation analysis, and automotive repair diagnostics. The relatively small output signal of the sensor ...

Page 16

AD8638/AD8639 OUTLINE DIMENSIONS 1.70 1.60 1.50 1.30 1.15 0.90 0.15 MAX 0.05 MIN 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 3.00 2.90 2. 3.00 2.80 2. 0.95 BSC 1.90 BSC 0.20 MAX 1.45 MAX 0.08 MIN 0.95 ...

Page 17

PIN 1 IDENTIFIER 0.65 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.40 0.05 0.25 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 57. 8-Lead Mini Small Outline ...

Page 18

... AD8638/AD8639 ORDERING GUIDE 1, 2 Model Temperature Range AD8638ARJZ-R2 −40°C to +125°C AD8638ARJZ-REEL −40°C to +125°C AD8638ARJZ-REEL7 −40°C to +125°C AD8638ARZ −40°C to +125°C AD8638ARZ-REEL −40°C to +125°C AD8638ARZ-REEL7 −40°C to +125°C AD8639ACPZ-R2 −40°C to +125°C AD8639ACPZ-REEL − ...

Page 19

NOTES Rev Page AD8638/AD8639 ...

Page 20

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