AD8671 Precision Low Noise, Low Input Bias Current, Single Op Amp

The AD8671/AD8672/AD8674 are very high precision amplifiers featuring very low noise, very low offset voltage and drift, low input bias current, 10 MHz bandwidth, and low power consumption. Outputs are stable with capacitive loads of over 1000 pF. Supply current is less than 3 mA per amplifier at 30 V. APPLICATIONS

The AD8671/AD8672/AD8674’s combination of ultralow noise, high precision, speed, and stability is unmatched. The MSOP version of the AD8671/AD8672 requires only half the board space of comparable amplifiers.

Applications for these amplifiers include high quality PLL filters, precision filters, medical and analytical instrumentation, precision power supply controls, ATE, data acquisition, and precision controls as well as professional quality audio.

The AD8671/AD8672 are specified over the extended industrial temperature range (−40°C to +125°C), and the AD8674 is specified over the industrial temperature range (−40°C to +85°C).

The AD8671/AD8672 are available in the 8-lead SOIC and 8-lead MSOP packages. The AD8674 is available in 14-lead SOIC and 14-lead TSSOP packages.

Surface-mount devices in MSOP packages are available in tape and reel only.

Features and Benefits

Very low noise:
2.8 nV/√Hz, 77 nV p-p

Wide Bandwidth: 10MHz

Low Input Bias Current:
12 nA max

Low Offset Voltage: 75 µV max

High open loop gain: 120 dB min

Low supply current:
3 mA typ per amplifier

Dual supply operation:
±5V to ±15V

Unity Gain Stable

No Phase Reversal

Amplifiers

SPICE Models

AD8671 SPICE Macro Model .CIR

Data Sheets

Document	note
AD8671/AD8672/AD8674: Precision, Very Low Noise, Low Input Bias Current Operational Amplifiers Data Sheet (Rev. F)	PDF 459 kB

Application Notes

Document	note
AN-358: Noise and Operational Amplifier Circuits	PDF 593 kB
AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)	PDF 5.3 M

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD8671ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	1.25	1.06	Y
AD8671ARMZ-REEL Production	8 ld MSOP	REEL 3000	-40 to 125C	0	1.06	Y
AD8671ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	1.25	1.06	Y
AD8671ARZ-REEL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	1.06	Y
AD8671ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	1.06	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