Datasheet

ManualsBrandsANALOG DEVICES ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 8

Single and Dual, Ultralow

Distortion, Ultralow Noise Op Amps

Data Sheet

AD8597/AD8599

Rev. E Document Feedback

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FEATURES

Low noise: 1.1 nV/√Hz at 1 kHz

Low distortion: −120 dB THD at 1 kHz

Input noise, 0.1 Hz to 10 Hz: <76 nV p-p

Slew rate: 14 V/μs

Wide bandwidth: 10 MHz

Supply current: 4.8 mA/amp typical

Low offset voltage: 10 μV typical

CMRR: 120 dB

Unity-gain stable

±15 V operation

APPLICATIONS

Professional audio preamplifiers

ATE/precision testers

Imaging systems

Medical/physiological measurements

Precision detectors/instruments

Precision data conversion

PIN CONFIGURATIONS

06274-060

–IN

+IN

V–

V+

OUT

NC = NO CONNECT

AD8597

TOP VIEW

(Not to Scale)

Figure 1. AD8597 8-Lead SOIC (R-8)

PIN 1

INDICATOR

–IN

+IN

V–

7V+

8NC

6OUT

5NC

TOP VIEW

06274-061

AD8597

NOTES

1. NC = NO CONNECT.

2. IT IS RECOMMENDED THAT THE

EXPOSED PAD BE CONNECTED

TO V–.

Figure 2. AD8597 8-Lead LFCSP (CP-8-2)

OUT A

–IN A

+IN A

–V

OUT B

–IN B

+IN B

AD8599

TOP VIEW

(Not to Scale)

06274-054

Figure 3. AD8599 8-Lead SOIC (R-8)

GENERAL DESCRIPTION

The AD8597/AD8599 are very low noise, low distortion opera-

tional amplifiers ideal for use as preamplifiers. The low noise of

1.1 nV/√Hz and low harmonic distortion of −120 dB (or better)

at audio bandwidths give the AD8597/AD8599 the wide dynamic

range necessary for preamplifiers in audio, medical, and instru-

mentation applications. The excellent slew rate of 14 V/μs and

10 MHz gain bandwidth make them highly suitable for medical

applications. The low distortion and fast settling time make

them ideal for buffering of high resolution data converters.

The AD8597 is available in 8-lead SOIC and LFCSP packages,

while the AD8599 is available in an 8-lead SOIC package. They

are both specified over a −40°C to +125°C temperature range.

The AD8597 and AD8599 are members of a growing series of

low noise op amps offered by Analog Devices, Inc. (see Table 1).

Table 1. Low Noise Op Amps

Package 0.9 nV 1.1 nV 1.8 nV 2.8 nV 3.8 nV

Single AD797 AD8597 ADA4004-1 AD8675 AD8671

Dual AD8599 ADA4004-2 AD8676 AD8672

Quad ADA4004-4 AD8674

Summary of content (20 pages)

PAGE 1
PIN CONFIGURATIONS Low noise: 1.1 nV/√Hz at 1 kHz Low distortion: −120 dB THD at 1 kHz Input noise, 0.1 Hz to 10 Hz: <76 nV p-p Slew rate: 14 V/μs Wide bandwidth: 10 MHz Supply current: 4.8 mA/amp typical Low offset voltage: 10 μV typical CMRR: 120 dB Unity-gain stable ±15 V operation NC 1 –IN 2 AD8597 +IN 3 TOP VIEW V– 4 (Not to Scale) 8 NC 7 V+ 6 OUT 5 NC NC = NO CONNECT 06274-060 FEATURES Figure 1.
PAGE 2
AD8597/AD8599 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 ESD Caution...................................................................................5 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................6 Pin Configurations .......................................................
PAGE 3
Data Sheet AD8597/AD8599 SPECIFICATIONS VSY = ±5 V, VCM = 0 V, VO = 0 V, TA = 25°C, unless otherwise specified. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions Min VOS Typ Max Unit 15 120 180 μV μV 0.8 40 2.2 210 340 250 340 +2.
PAGE 4
AD8597/AD8599 Data Sheet VS = ±15 V, VCM = 0 V, VO = 0 V, TA = +25°C, unless otherwise specified. Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions Min VOS Typ Max Unit 10 120 180 μV μV 0.8 2.2 μV/°C 25 200 300 200 300 +12.
PAGE 5
Data Sheet AD8597/AD8599 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 4.
PAGE 6
AD8597/AD8599 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 70 50 AD8599 MEAN = 7.91 STDEV = 21.89 MIN = –63.02 MAX = 57.5 VSY = ±15V 60 NUMBER OF AMPLIFIERS 60 40 30 20 50 40 30 20 10 10 0 –75 –65 –55 –45 –35 –25 –15 –5 5 15 25 35 45 55 65 75 VOS (µV) 06274-001 0 –75 –65 –55 –45 –35 –25 –15 –5 5 15 25 35 45 55 65 75 VOS (µV) Figure 4. Input Offset Voltage Distribution 60 45 AD8599 MEAN = 0.765 STDEV = 0.234 MIN = 0.338 MAX = 1.
PAGE 7
Data Sheet AD8597/AD8599 75 50 25 25 VOS (µV) 50 0 0 –25 –25 –50 –50 –75 –75 –100 –5.0 –2.5 AD8599 VSY = ±15V 75 0 VCM (V) 2.5 5.0 –100 –15 06274-009 –10 Figure 10. Offset Voltage vs. VCM 0 VCM (V) 10 5 15 Figure 13. Offset Voltage vs.
PAGE 8
AD8597/AD8599 Data Sheet 150 80 AD8597 AD8599 70 100 60 50 IB (nA) IOS (nA) 50 40 IOS @ VSY = ±5V ±15V 0 ±5V 30 –50 20 IOS @ VSY = ±15V 06274-065 –100 10 –25 0 75 25 50 TEMPERATURE (°C) 100 125 –150 –50 06274-013 0 –50 0 –25 25 Figure 16. Input Offset Current vs. Temperature 75 100 125 Figure 19. Input Offset Current vs.
PAGE 9
Data Sheet AD8597/AD8599 80 80 AD8599 VSY = ±5V 60 AD8599 VSY = ±15V 60 OUTPUT CURRENT (mA) 20 0 –20 –40 ISOURCE ISINK 40 20 0 –20 –40 ISOURCE –60 –25 0 25 50 75 TEMPERATURE (°C) 100 125 150 –80 –50 06274-017 –80 –50 –25 0 Figure 22. ISC vs. Temperature 10 OUTPUT DROPOUT VOLTAGE (V OUT – VS) (V) AD8599 VSY = ±5V ISINK 1 ISOURCE 0.1 0.001 0.01 0.1 1 100 125 150 Figure 25. ISC vs. Temperature 100 10 IL (mA) AD8599 VSY = ±15V ISINK 1 ISOURCE 0.1 0.
PAGE 10
AD8597/AD8599 Data Sheet 0 0 AD8599 VSY = ±5V AD8599 VSY = ±15V –0.5 –1.0 VEE – VOL @ RL = 2kΩ –1.5 VEE – VOL @ RL = 600Ω –2.0 –1.0 VEE – VOL @ RL = 2kΩ –1.5 VEE – VOL @ RL = 600Ω –2.0 –25 0 25 50 75 TEMPERATURE (°C) 100 125 150 –2.5 –50 06274-028 –2.5 –50 Figure 28. Output Saturation Voltage vs. Temperature –13.0 –25 0 25 50 75 TEMPERATURE (°C) 100 125 150 06274-030 VEE – VOL (V) VEE – VOL (V) –0.5 Figure 31. Output Saturation Voltage vs. Temperature 15.
PAGE 11
Data Sheet AD8597/AD8599 50 50 40 40 AV = 100 AV = 100 30 30 20 AV = 10 GAIN (dB) 10 0 AV = 1 AV = 10 10 0 AV = 1 –10 –10 –20 –30 06274-068 AD8597 VSY = ±5V RL = 2kΩ –40 1 10 100 1k 10k AD8597 VSY = ±15V RL = 2kΩ –30 06274-071 –20 –40 1 50k 10 Figure 34. Closed-Loop Gain vs. Frequency 1k 50k 100 AV = –100 AV = –100 10 10 AV = –10 AV = –10 AV = +1 ZOUT (Ω) AV = +1 1 0.1 1 0.01 10 100 1k 10k 06274-072 06274-069 0.1 AD8597 VSY = ±5V AD8597 VSY = ±15V 0.
PAGE 12
AD8597/AD8599 Data Sheet 600 90 AD8599 MEAN = 1.30 STDEV = 0.09 MIN = 1.1 MAX = 1.5 ±5V ≤ VSY ≤ ±15V 70 AD8599 MEAN = 1.07 STDEV = 0.02 MIN = 1.05 MAX = 1.15 ±5V ≤ VSY ≤ ±15V 500 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 80 60 50 40 30 400 300 200 20 100 10 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 VOLTAGE NOISE DENSITY (nV/ Hz) 2.0 0 0.95 1.19 100 100 AD8599 ±5V ≤ VSY ≤ ±15V 10 1 10 100 FREQUENCY (Hz) 1k 1 10 1 1 1 0.1 0.1 THD + N (%) RL = 600Ω 0.01 AD8597 VSY = ±5V AV = +1 0.
PAGE 13
Data Sheet AD8597/AD8599 0.1 0.1 AD8599 VSY = ±15V VIN = 3V rms VIN = 3V rms VIN = 5V rms VIN = 7V rms 0.01 THD + N (%) THD + N (%) 0.01 AD8599 VSY = ±15V RL = 600Ω 0.001 0.001 100 1k FREQUENCY (Hz) 10k 100k 0.0001 10 100 Figure 46. THD + N vs. Frequency 100k Figure 49. THD + N vs. Frequency VSY = ±15V VIN = 20V p-p AV = 1 RF = 1kΩ RL = 2kΩ 15 10 AMPLITUDE (V) 10 5 0 –5 5 0 –5 –10 –15 –15 –4.6 –0.6 3.4 7.4 11.4 15.4 TIME (µs) 19.4 23.4 27.4 31.4 06274-047 –10 –20 –8.
PAGE 14
AD8597/AD8599 Data Sheet 45 45 AD8597 VSY = ±5V 40 AD8597 VSY = ±15V 40 35 35 30 30 OVERSHOOT (%) OVERSHOOT (%) OS– 25 20 OS– 15 25 20 15 OS+ 10 5 0 10 100 OS+ 06247-078 06247-077 10 5 0 10 1k 100 Figure 52. Overshoot vs. Capacitive Load Figure 55. Overshoot vs. Capacitive Load 15.0 10kΩ VCC VCC AD8599 1kΩ –40 12.5 VEE 2kΩ 2kΩ CH A –60 VEE CH B, CH C, CH D ISY (mA) 10V p-p –80 10.0 VSY = ±15V –100 VSY = ±5V –120 7.5 –140 1k 10k FREQUENCY (Hz) 1M 100k 5.
PAGE 15
Data Sheet AD8597/AD8599 FUNCTIONAL OPERATION The AD8597/AD8599 are not rail-to-rail input amplifiers; therefore, care is required to ensure that both inputs do not exceed the input voltage range. Under normal negative feedback operating conditions, the amplifier corrects its output to ensure that the two inputs are at the same voltage. However, if either input exceeds the input voltage range, the loop opens and large currents begin to flow through the ESD protection diodes in the amplifier.
PAGE 16
AD8597/AD8599 Data Sheet general noise theory with extensive calculations, see the AN-358 Application Note, Noise and Operational Amplifier Circuits. A good selection table for low noise op amps can be found in AN-940 Application Note, Low Noise Amplifier Selection Guide for Optimal Noise Performance. An interesting note on using one section of a monolithic dual to phase compensate the other section is in the AN-107 Application Note, Active Feedback Improves Amplifier Phase Accuracy.
PAGE 17
Data Sheet AD8597/AD8599 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 8 4.00 (0.1574) 3.80 (0.1497) 1 5 6.20 (0.2441) 5.80 (0.2284) 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) 0.50 (0.0196) 0.25 (0.0099) 45° 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.
PAGE 18
AD8597/AD8599 Data Sheet NOTES Rev.
PAGE 19
Data Sheet AD8597/AD8599 NOTES Rev.