ADA4001-2 Low Noise, Low Input Bias Current, Rail-to-Rail Output, JFET Dual Op Amp

The ADA4001-2 is a dual JFET amplifier that features low input bias current, low input voltage noise, low input current noise, and rail-to-rail output.

The combination of low offset, low noise, and very low input bias currents makes this amplifier especially suitable for high impedance sensor amplification and precise current measure-ments using shunts. The combination of dc precision, low noise, and fast settling time results in superior accuracy in medical instruments, electronic measurement, and automated test equipment. Unlike many competitive amplifiers, the ADA4001-2 maintains fast settling performance even with substantial capacitive loads. Unlike many older JFET amplifiers, the ADA4001-2 does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range.

Fast slew rate and great stability with capacitive loads make the ADA4001-2 a perfect fit for high performance filters. Low input bias currents, low offset, and low noise result in a wide dynamic range of photodiode amplifier circuits. Low noise and low dis-tortion, high output current, and excellent speed make the ADA4001-2 a great choice for audio applications.

The ADA4001-2 is specified over the −40°C to +125°C extended industrial temperature range.

The ADA4001-2 is available in an 8-lead narrow SOIC package.

Applications

Instrumentation
Medical Instruments
Multipole filters
Precision current measurement
Photodiode amplifiers
Sensors
Audio

Features and Benefits

Low T_CV_OS:
±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

Amplifiers

SPICE Models

ADA4001 SPICE Macro Model .CIR

Data Sheets

Document	note
ADA4001-2: Low Noise, Low Input Bias Current, Rail-to-Rail Output, JFET Dual Operational Amplifier Data Sheet (Rev. C)	PDF 129 kB

Application Notes

Document	note
AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev. B)	PDF 76.97 K
AN-940: Low Noise Amplifier Selection Guide for Optimal Noise Performance (Rev. D)	PDF 199 kB

Frequently Asked Questions

Document	note

Technical Books

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Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADA4001-2ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	1.43	1.09	Y
ADA4001-2ARZ-R7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	1.09	Y
ADA4001-2ARZ-RL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	1.09	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-2CPZ	Dual CP-8 lead LFCSP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-2RMZ	Dual RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-2RZ	Dual R-8 lead SOIC Evaluation Board	20.19	Y