AD8675 36 V Precision, 2.8 nV/√Hz Rail-to-Rail Output Op Amp

The AD8675 precision operational amplifier has ultralow offset, drift, and voltage noise combined with very low input bias currents over the full operating temperature range. The AD8675 is a precision, wide bandwidth op amp featuring rail-to-rail output swings and very low noise. Operation is fully specified from ±5 V to ±15 V.

The AD8675 features a rail-to-rail output like that of the OP184, but with wide bandwidth and even lower voltage noise, com-bined with the precision and low power consumption like that of the industry-standard OP07 amplifier. Unlike other low noise, rail-to-rail op amps, the AD8675 has very low input bias current and low input current noise.

With typical offset voltage of only 10 μV, offset drift of 0.2 μV/°C, and noise of only 0.10 μV p-p (0.1 Hz to 10 Hz), the AD8675 is perfectly suited for applications where large error sources cannot be tolerated. For applications with even lower offset tolerances, the proprietary nulling capability allows a combination of both device and system offset errors up to 3.5 mV (referred to the input) to be compensated externally. Unlike previous circuits, the AD8675 accommodates this adjustment without adversely affecting the offset drift, CMRR, and PSRR of the amplifier. Precision instrumentation, PLL, and other precision filter circuits, position and pressure sensors, medical instrumentation, and strain gage amplifiers benefit greatly from the very low noise, low input bias current, and wide bandwidth. Many systems can take advantage of the low noise, dc precision, and rail-to-rail output swing provided by the AD8675 to maximize SNR and dynamic range.

The smaller packages and low power consumption afforded by the AD8675 allow maximum channel density or minimum board size for space-critical equipment.

The AD8675 is specified for the extended industrial temperature range (−40°C to +125°C). The AD8675 amplifier is available in the tiny 8-lead MSOP, and the popular 8-lead, narrow SOIC, RoHS compliant packages. MSOP packaged devices are only available in tape and reel format.

Applications

Precision instrumentation
PLL filters
Laser diode control loops
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers

Features and Benefits

Very low voltage noise: 2.8 nV/√Hz

Rail-to-rail output swing

Low input bias current: 2 nA maximum

Very low offset voltage: 75 μV maximum

Low input offset drift: 0.6 μV/°C maximum

Very high gain: 120 dB

Wide bandwidth: 10 MHz typical

±5 V to ±18 V operation

Amplifiers

SPICE Models

AD8675 SPICE Macro Model .CIR

Reference Designs

Data Sheets

Document	note
AD8675: 36 V Precision, 2.8 nV/√Hz Rail-to-Rail Output Op Amp Data Sheet (Rev. E)	PDF 360 kB

Application Notes

Document	note
AN-358: Noise and Operational Amplifier Circuits	PDF 593 kB

Frequently Asked Questions

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD8675ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	1.4	1.18	Y
AD8675ARMZ-REEL Production	8 ld MSOP	REEL 3000	-40 to 125C	0	1.18	Y
AD8675ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	1.41	1.18	Y
AD8675ARZ-REEL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	1.18	Y
AD8675ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	1.18	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-1KSZ	Single KS-5 lead SC70 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RJZ	Single RJ-5 lead SOT23 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RMZ	Single RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RZ	Single R-8 lead SOIC Evaluation Board	20.19	Y