Datasheet

ManualsBrandsANALOG DEVICES ManualsLinear ICsLinear IC - Op-amp J-FET SOIC 8

30 V, High Speed, Low Noise, Low Bias

Current, JFET Operational Amplifier

Data Sheet

ADA4627-1/ADA4637-1

Rev. E Document Feedback

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FEATURES

Low offset voltage: 200 μV maximum

Offset drift: 1 μV/°C typical

Very low input bias current: 5 pA maximum

Extended temperature range: −40°C to +125°C

±5 V to ±15 V dual supply

ADA4627-1 GBW: 19 MHz

ADA4637-1 GBW: 79 MHz

Voltage noise: 6.1 nV/√Hz at 1 kHz

ADA4627-1 slew rate: 82 V/μs

ADA4637-1 slew rate: 170 V/μs

High gain: 120 dB typical

High CMRR: 116 dB typical

High PSRR: 112 dB typical

APPLICATIONS

High impedance sensors

Photodiode amplifier

Precision instrumentation

Phase-locked loop filters

High end, professional audio

DAC output amplifier

ATE

Medical

PIN CONFIGURATIONS

Figure 1. 8-Lead SOIC_N (R-8)

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

Figure 3. 8-Lead LFCSP_VD (CP-8-2)

GENERAL DESCRIPTION

The ADA4627-1/ADA4637-1 are wide bandwidth precision

amplifiers featuring low noise, very low offset, drift, and bias

current. The parts operate from ±5 V to ±15 V dual supply.

The ADA4627-1/ADA4637-1 provide benefits previously found

in few amplifiers. These amplifiers combine the best specifications

of precision dc and high speed ac op amps. The ADA4637-1 is

a decompensated version of the ADA4627-1 and is stable at a

noise gain of 5 or greater.

With a typical offset voltage of only 70 μV, drift of less than

1 μV/°C, and noise of only 0.86 μV p-p (0.1 Hz to 10 Hz), the

ADA4627-1/ADA4637-1 are suited for applications where error

sources cannot be tolerated.

The ADA4627-1/ADA4637-1 are specified for both the

industrial temperature range of −25°C to +85°C and the

extended industrial temperature range of −40°C to +125°C. The

ADA4627-1/ADA4637-1 are available in tiny 8-lead LFCSP and

8-lead SOIC packages.

The ADA4627-1/ADA4637-1 are members of a growing series

of high speed, precision op amps offered by Analog Devices,

Inc. (see Table 1).

Table 1. High Speed Precision Op Amps

Supply 5 V Low Cost 5 V 26 V Low Power 30 V Low Cost 30 V

Single AD8615 AD8651 AD8610 AD8510

ADA4627-1/ADA4637-1

Dual AD8616 AD8652 AD8620 AD8512

Quad AD8618 AD8513

NULL

–IN

+IN

V–

V+

OUT

NULL

NC = NO CONNECT

ADA4627-1

TOP VIEW

(Not to Scale)

07559-001

NULL

–IN

+IN

V–

V+

OUT

NULL

NC = NO CONNECT

ADA4637-1

TOP VIEW

(Not to Scale)

07559-103

PIN 1

INDICATOR

NOTES

1. NC = NO CONNECT.

2. IT IS RECOMMENDED

THAT THE EXPOSED PAD BE

CONNECTED TO V–.

1NC

2–IN

3+IN

4V–

7V+

8NC

6OUT

5NC

TOP VIEW

(Not toScale)

ADA4627-1/

ADA4637-1

07559-002

Summary of content (20 pages)

PAGE 1
30 V, High Speed, Low Noise, Low Bias Current, JFET Operational Amplifier ADA4627-1/ADA4637-1 Data Sheet PIN CONFIGURATIONS Low offset voltage: 200 μV maximum Offset drift: 1 μV/°C typical Very low input bias current: 5 pA maximum Extended temperature range: −40°C to +125°C ±5 V to ±15 V dual supply ADA4627-1 GBW: 19 MHz ADA4637-1 GBW: 79 MHz Voltage noise: 6.
PAGE 2
ADA4627-1/ADA4637-1 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Input Voltage Range ................................................................... 14 Applications ....................................................................................... 1 Input Offset Voltage Adjust Range........................................... 14 Pin Configurations ..........................................................
PAGE 3
Data Sheet ADA4627-1/ADA4637-1 SPECIFICATIONS ELECTRICAL CHARACTERISTICS—30 V OPERATION VSY = ±15 V, VCM = 0 V, TA = 25°C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage 1 Offset Voltage Drift, Average Power Supply Rejection Ratio Input Bias Current 2 Symbol Test Conditions/Comments Min VOS B Grade Typ 70 ∆VOS/∆T −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C PSRR VSY = ±4.5 V to ±18 V 106 −40°C ≤ TA ≤ +125°C 101 1 IB 0.
PAGE 4
ADA4627-1/ADA4637-1 Parameter Settling Time to 0.01% ADA4627-1 Symbol tS ADA4637-1 Settling Time to 0.1% ADA4627-1 Test Conditions/Comments Min B Grade Typ Min A Grade Typ Max Unit VIN = 10 V step, CL = 35 pF, RL = +1 kΩ, AV = −1 VIN = 10 V step, CL = 35 pF, RL = +1 kΩ, AV = −4 550 550 ns 300 300 ns VIN = 10 V step, CL = 35 pF, RL = +1 kΩ, AV = −1 VOUT = 10 V step, CL = 35 pF, RL = +1 kΩ, AV = −4 450 450 ns 200 200 ns 19 79.9 MHz 72 85 0.
PAGE 5
Data Sheet ADA4627-1/ADA4637-1 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 3. Parameter Supply Voltage Input Voltage Range1 Input Current1 Differential Input Voltage2 Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) ESD Human Body Model Rating 36 V (V−) − 0.3 V to (V+) + 0.
PAGE 6
ADA4627-1/ADA4637-1 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 120 10 ADA4627-1 TA = 25°C VSY = ±15V 80 60 78° 40 20 0 ADA4627-1 TA = 25°C VSY = ±15V –20 1 0.01 10 0.1 1 FREQUENCY (kHz) –40 1k 10k 100k 1M FREQUENCY (Hz) 10M 100 140 RL = 1kΩ 10 120 AV = –10 ZOUT (Ω) RL = 600Ω 100 1 AV = –100 AV = –1 0.1 80 ADA4627-1 TA = 25°C VSY = ±15V VO = ±11V 0 –25 25 50 TEMPERATURE (°C) 100 75 125 0.
PAGE 7
Data Sheet ADA4627-1/ADA4637-1 120 100 60 PSRR– PSRR+ 40 ADA4627-1 TA = 25°C VSY = ±15V 20 0 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 100 90 80 70 60 –50 07559-009 PSRR (dB) 80 110 –25 0 25 50 75 100 125 TEMPERATURE (°C) Figure 13. CMRR vs. Temperature Figure 10. PSRR vs. Frequency 8 20 –40ºC ADA4627-1 TA = 25°C VSY = ±15V 7 +25ºC 6 +85ºC 10 +125ºC 5 VOL – VSS (V) SUPPLY CURRENT (mA) ADA4627-1 VSY = ±15V VCM = ±11.
PAGE 8
ADA4627-1/ADA4637-1 Data Sheet 8 0.01 ADA4627-1 TA = 25°C VSY = ±15V VIN = 810mV RL = 600Ω 80kHz FILTER 6 0.001 THD + N (%) 5 4 3 0.0001 2 0 4 0 8 12 16 20 24 28 32 SUPPLY VOLTAGE (V) 36 07559-071 ADA4627-1 TA = 25°C SOIC PACKAGE 1 0.00001 0.01 07559-015 SUPPLY CURRENT (mA) 7 Figure 16. Supply Current vs. Supply Voltage 0.1 1 FREQUENCY (kHz) 10 Figure 19. THD + N vs. Frequency 10,000 0.1 ADA4627-1 VSY = ±15V 1,000 0.01 THD + N (%) MEASURED IB (pA) 100 0.
PAGE 9
Data Sheet ADA4627-1/ADA4637-1 1200 1100 OUTPUT VOLTAGE (5V/DIV) IB+ 900 IB (pA) 800 IB– 700 600 500 400 300 100 0 –15 –10 ADA4627-1 TA = 25°C AV = –1 VIN = 20V p-p RF = RIN = 2kΩ CF = 10pF RL = 1kΩ CL = 1nF 07559-074 ADA4627-1 TA = 125°C VSY = ±15V 200 1 –5 0 VCM (V) 5 10 07559-061 1000 TIME (1µs/DIV) 15 Figure 22. Input Bias Current vs. VCM at 125°C Figure 25.
PAGE 10
1 ADA4627-1 TA = 25°C AV = –1 VIN = 200mV p-p RF = RIN = 2kΩ CF = 5pF TIME (1µs/DIV) TIME (200ns/DIV) Figure 31. Small Signal Transient Response 1 1 ADA4627-1 TA = 25°C AV = +1 VIN = 200mV p-p RF = 0Ω RL = 1kΩ CL = 1nF TIME (200ns/DIV) TIME (200ns/DIV) Figure 32. Small Signal Transient Response OUTPUT VOLTAGE (50mV/DIV) Figure 29.
PAGE 11
Data Sheet ADA4627-1/ADA4637-1 20 INPUT VOLTAGE (5V/DIV) 1 10 AMPLITUDE (V) ADA4627-1 TA = 25°C VSY = ±15 5 0 –5 VOUT –10 OUTPUT VOLTAGE (1mV/DIV) ADA4627-1 TA = 25°C VSY = ±15V 15 VOUT 2 VIN 07559-077 –15 VIN 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 TIME (ms) TIME (200ns/DIV) Figure 34.
PAGE 12
ADA4627-1/ADA4637-1 Data Sheet 120 PSRR+ OUTPUT VOLTAGE (100mV/DIV) 100 PSRR– PSRR (dB) 80 60 40 100 07559-085 0 10 ADA4637-1 VSY = ±15V AV = +5 TA = 25°C 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) 07559-081 20 ADA4637-1 TA = 25°C AV = +5 VSY = ±15V RIN = 500Ω RF = 2kΩ CF = 4.8pF CL = 50pF TIME (200ns/DIV) Figure 43. Small Signal Transient Response Figure 40. PSRR vs. Frequency 50 ADA4637-1 TA = 25°C AV = –4 VSY = ±15V RIN = 500Ω RF = 2kΩ CF = 4.
PAGE 13
Data Sheet ADA4627-1/ADA4637-1 ADA4637-1 VSY = ±15V VCM = 0V TA = 25°C 10 1 1 10 100 1k 10k FREQUENCY (Hz) 100k 07559-080 VOLTAGE NOISE DENSITY (nV/√Hz) 100 Figure 46. Voltage Noise Density vs. Frequency Rev.
PAGE 14
ADA4627-1/ADA4637-1 Data Sheet THEORY OF OPERATION The ADA4627-1 is a high speed, unity gain stable amplifier with excellent dc characteristics. The ADA4637-1 is a decompensated version that is stable at a gain of 5 or greater. The typical offset voltage of 70 µV allows the amplifiers to be easily configured for high gains without the risk of excessive output voltage errors.
PAGE 15
Data Sheet ADA4627-1/ADA4637-1 THD + N MEASUREMENTS CF GUARD Total harmonic distortion plus noise (THD + N) is usually measured with an audio analyzer, such as those from Audio Precision, Inc™. The analyzer consists of a low distortion oscillator that is swept from the starting frequency to the ending frequency. The oscillator is connected to the circuit under test, and the output of the circuit goes back to the analyzer. RF 2 ADA4627-1 IN 07559-053 Figure 50.
PAGE 16
ADA4627-1/ADA4637-1 Data Sheet DECOMPENSATED OP AMPS The ADA4637-1 is a decompensated op amp, and, as such, must always be operated at a noise gain of 5 or greater. See tutorial MT-033, Voltage Feedback Op Amp Gain and Bandwidth, at www.analog.com for more information. DRIVING CAPACITIVE LOADS or oscillation. The ADA4627-1/ADA4637-1 have a high phase margin and low output impedance, so they can drive reasonable values of capacitance.
PAGE 17
Data Sheet ADA4627-1/ADA4637-1 OUTLINE DIMENSIONS 0.60 MAX 5 2.95 2.75 SQ 2.55 TOP VIEW PIN 1 INDICATOR 8 12° MAX (BOTTOM VIEW) 0.50 0.40 0.30 0.70 MAX 0.65 TYP 0.05 MAX 0.01 NOM 0.30 0.23 0.18 SEATING PLANE 1.60 1.45 1.30 EXPOSED PAD 4 0.90 MAX 0.85 NOM 0.50 BSC 0.60 MAX 0.20 REF 1 1.89 1.74 1.59 PIN 1 INDICATOR FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. 04-04-2012-A 3.25 3.00 SQ 2.75 Figure 52.
PAGE 18
ADA4627-1/ADA4637-1 Data Sheet ORDERING GUIDE Model 1 ADA4627-1ACPZ-R2 ADA4627-1ACPZ-RL ADA4627-1ACPZ-R7 ADA4627-1ARZ ADA4627-1ARZ-RL ADA4627-1ARZ-R7 ADA4627-1BRZ ADA4627-1BRZ-R7 ADA4627-1BRZ-RL ADA4637-1ACPZ-R2 ADA4637-1ACPZ-RL ADA4637-1ACPZ-R7 ADA4637-1ARZ ADA4637-1ARZ-RL ADA4637-1ARZ-R7 ADA4637-1BRZ ADA4637-1BRZ-R7 ADA4637-1BRZ-RL 1 Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to
PAGE 19
Data Sheet ADA4627-1/ADA4637-1 NOTES Rev.
PAGE 20
ADA4627-1/ADA4637-1 Data Sheet NOTES ©2009–2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07559-0-1/14(E) Rev.