ADA4001-2

ADA4001-2 (Rev. C)

Document overview

• Manufacturer or author: Analog Devices, Inc.
• PDF pages: 12

Technical content

Low Noise, Low Input Bias Current, Rail-to-Rail Output, JFET Dual Operational Amplifier Data Sheet ADA4001-2 Rev. C Document Feedback 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. Tel: 781.329.4700 ©2012–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com

FEATURES

Low TCVOS: ±5 µV/°C typical Low input bias current: 20 pA typical at VSY = ±15 V Low noise 7.7 nV/√Hz typical at f = 1 kHz 1.2 µV rms at 20 Hz to 20 kHz Low distortion: 0.00006% No phase reversal Rail-to-rail output Unity-gain stable

APPLICATIONS

Precision current measurement Photodiode amplifiers Sensors Audio PIN CONFIGURATION 10375-002 OUT A 1 –IN A 2 +IN A 3 V– 4 V+8 OUT B7 –IN B6 +IN B5 ADA4001-2 TOP VIEW (Not to Scale) Figure 1. 8-Lead SOIC_N (R Suffix) exceed the maximum common-mode voltage range. a great choice for audio applications. industrial temperature range. The ADA4001-2 is available in an 8-lead narrow SOIC package.

Rev. C | Page 2 of 12 TABLE OF CONTENTS

REVISION HISTORY

5/13—Rev. B to Rev C 5/12—Rev. A to Rev B Changed Input Impedance to Input Capacitance Throughout .. 3 2/12—Rev. 0 to Rev. A 2/12—Revision 0: Initial Version

Rev. C | Page 3 of 12 SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

VSY = ±15 V , VCM = 0 V, TA = 25°C, unless otherwise noted. Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS ±0.5 ±1.5 mV Offset Voltage Drift ΔVOS/ΔT ±5 µV/°C Input Bias Current IB 20 30 pA −40°C < TA < +125°C 4 nA Input Offset Current IOS 20 pA −40°C < TA < +125°C 2 nA Input Voltage Range −12.5 +12.5 V Common-Mode Rejection Ratio CMRR VCM = −12.5 V to +12.5 V 96 105 dB −40°C < TA < +125°C 90 dB Large Signal Voltage Gain AVO RL = 10 kΩ, VO = −13.5 V to +13.5 V 104 112 dB RL = 2 kΩ, VO = −13.5 V to +13.5 V 104 112 dB −40°C < TA < +125°C 90 dB RL = 600 Ω, VO = −13.0 V to +13.0 V 90 93 dB Input Capacitance, Differential CDM VCM = 0 V 3.1 pF Input Capacitance, Common-Mode CCM VCM = 0 V 4.8 pF Input Resistance VCM = 0 V >1 × 1013 Ω OUTPUT CHARACTERISTICS Output Voltage High VOH RL = 10 kΩ 14.8 V RL = 2 kΩ 14.5 V RL = 600 Ω 13.5 V Output Voltage Low VOL RL = 10 kΩ −14.8 V RL = 2 kΩ −14.5 V RL = 600 Ω −13.5 V Short-Circuit Current ISC ±50 mA POWER SUPPLY Power Supply Rejection Ratio PSRR VS = ±4.5 V to ±18 V 96 110 dB −40°C < TA < +125°C 93 dB Operating Voltage Range ±5 ±18 V Supply Current/Amplifier ISY VO = 0 V 2 3 mA 4 mA DYNAMIC PERFORMANCE Slew Rate SR RL = 2 kΩ ±151 ±25 V/µs Gain Bandwidth Product GBP VIN = 5 mV p-p, RL = 10 kΩ, AV = 100 16.7 MHz Unity-Gain Crossover UGC VIN = 5 mV p-p, RL = 10 kΩ, AV = 1 10.2 MHz Phase Margin φM 76 Degrees −3 dB Closed-Loop Bandwidth −3 dB AV = 1, VIN = 5 mV p-p 10.3 MHz Settling Time tS To 0.01%, 10 V step, G = +1 1.2 µs Total Harmonic Distortion (THD) + Noise THD + N 1 kHz, G = +1, RL = 2 kΩ 0.00006 % NOISE PERFORMANCE Voltage Noise en rms 20 Hz to 20 kHz 1.2 μV rms Voltage Noise Density en f = 100 Hz 8.8 nV/√Hz f = 1 kHz 7.7 nV/√Hz Current Noise Density in f = 1 kHz 3 fA/√Hz 1 Guaranteed by design and characterization.

Rev. C | Page 4 of 12 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage ±18 V Input Voltage ±VSY Output Short-Circuit Duration to GND Observe derating curves Storage Temperature Range −65°C to +150°C Operating Temperature Range −40°C to +125°C Junction Temperature Range −65°C to +150°C Lead Temperature (Soldering, 10 sec) 300°C Electrostatic Discharge (Human Body Model) 3000 V Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. THERMAL RESISTANCE Table 3. Package Type θJA1 θJC Unit 8-Lead SOIC_N (R-8) 130 45 °C/W 1 θJA is specified for worst-case conditions, that is, θJA is specified for a device soldered in a circuit board for surface-mount packages. ESD CAUTION

en is the input voltage noise density of the part. in is the input current noise density of the part. RS is the source resistance at the noninverting terminal. k is Boltzmann’s constant (1.38 × 10–23 J/K). T is the ambient temperature in Kelvin (T = 273 + °C). 100 MΩ, an impractical value for most applications. where BW is the bandwidth in hertz. frequencies, flicker noise (1/f) must be considered. motion sensors, and bar code readers. instrumentation applications. Figure 28. Equivalent Preamplifier Photodiode Circuit yields a bandwidth whose corner frequency is 1/(2π(R2Cf)). V is the desired output voltage of the op amp. where ft is the unity gain frequency of the amplifier. a phase margin, φM, of approximately 45°. maximum signal bandwidth by 50%.

Rev. C | Page 11 of 12 INPUT BIAS CURRENT Because the ADA4001-2 has a JFET input stage, the input bias current, due to the reverse-biased junction, has a leakage current that approximately doubles every 10°C. The power dissipation of the part, combined with the thermal resistance of the package, results in the junction temperature increasing 30°C above ambient. This parameter is tested with high speed ATE equipment, which does not result in the die temperature reaching equilibrium. This is correlated with bench measurements to match the guaranteed maximum at room temperature in Table 1. The input current can be reduced by keeping the temperature as low as possible and using a light load on the output. NOISE CONSIDERATIONS The JFET input stage offers very low input voltage noise and input current noise. The thermal noise of a 1 kΩ resistor at room temperature is 4 nV/√Hz, thus low values of resistance should be used for dc-coupled inverting and noninverting amplifier configurations. In the case of transimpedance amplifiers (TIAs), current noise is more important. The ADA4001-2 is an excellent choice for both of these applications. Analog Devices, Inc., offers a wide variety of low voltage noise and low current noise op amps in a variety of processes optimized for different supply voltage ranges. Refer to the AN-940 Application Note for a complete discussion of noise, calculations, and selection tables for more than three dozen low noise, op amp families.

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 29. 8-Lead Standard Small Outline Package [SOIC_N] registered trademarks are the prop erty of their respective owners.