Analog Devices

AD8512ARZ - Precision Low Noise JFET Op Amp | Analog Devices

Name: AD8512ARZ
Brand: Analog Devices
Price: 2.25 USD
Availability: InStock

MPN: AD8512ARZ ✓ Active

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100 µV Vdss 1 pA Id 8-SOIC Package

From $2.25 USD / Unit

MOQ: 1 |

Price updated: 2026-08-21

Volume Pricing

Qty	Unit Price	Extended
1	$3.5	$3.50
10	$3.15	$31.50
100	$2.8	$280.00
500	$2.5	$1,250.00
1,000	$2.25	$2,250.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for AD8512ARZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

AD8512ARZ-REEL

✅ Drop-In

📦 8-SOIC

Same die, tape and reel packaging variant

📋 Reference alternative (not in catalog)

AD8512AR

✅ Drop-In

📦 8-SOIC

Non-lead-free version, same electrical specs

📋 Reference alternative (not in catalog)

AD8628ARZ

✅ Drop-In

Analog Devices

📦 8-SOIC

Zero-Drift · 1 · Rail-to-Rail · 1 V/µs · 2.5 MHz · 100 pA max · 1 µV · 1.7 mA

✓ In Stock

$1.49 / Unit

View Datasheet →

ADA4077-2ARZ

✅ Drop-In

Analog Devices

📦 8-SOIC

2 · 3.6 MHz · 1.2 V/µs · 15 µV (A grade) · 0.15 µV/°C · 0.5 nA · ±2.5 V to ±15 V (or 5 V to 30 V single supply) · 400 µA

✓ In Stock

$2.19 / Unit

View Datasheet →

AD820ARZ

✅ Drop-In

Analog Devices

📦 8-SOIC

J-FET · 1 · Rail-to-Rail · 3 V/µs · 1.9 MHz · 2 pA · 100 µV · 700 µA

✓ In Stock

$2.2 / Unit

View Datasheet →

OPA2188

✅ Drop-In

📦 8-SOIC

Zero-drift, lower offset (0.5 µV), lower bandwidth (2 MHz), pin-compatible

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

AD8512ARZ Maximum Ratings & Electrical Characteristics

Amplifier Type	JFET
Number of Circuits	2
Output Type	Rail-to-Rail
Slew Rate	20 V/µs
Gain Bandwidth Product	8 MHz
Current - Input Bias	1 pA
Voltage - Input Offset	100 µV
Current - Supply	2.5 mA (x2 channels)
Current - Output / Channel	70 mA
Voltage - Supply Span (Min)	±5 V
Voltage - Supply Span (Max)	±15 V
Operating Temperature	-40°C to +125°C
Package / Case	8-SOIC
Mounting Type	Surface Mount
Voltage Noise	8 nV/√Hz
Input Common-Mode Voltage Range	±13 V (typical)
Capacitive Load Stability	500 pF

AD8512ARZ Pin Configuration

Pin 1	OUT A — Output of amplifier A
Pin 2	-IN A — Inverting input of amplifier A
Pin 3	+IN A — Non-inverting input of amplifier A
Pin 4	V- — Negative power supply
Pin 5	+IN B — Non-inverting input of amplifier B
Pin 6	-IN B — Inverting input of amplifier B
Pin 7	OUT B — Output of amplifier B
Pin 8	V+ — Positive power supply

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

AD8512ARZ is suitable for 6 applications: Precision Instrumentation, Active Filters, Data Acquisition Systems, Audio Preamplifiers, Photodiode Amplifiers, Medical Instrumentation.

🔧

Precision Instrumentation

The AD8512ARZ's low offset voltage (100 µV) and low input bias current (1 pA) make it ideal for precision instrumentation amplifiers. In a typical data acquisition system, the AD8512ARZ buffers high-impedance sensors, ensuring minimal loading and accurate signal transfer. Its low noise (8 nV/√Hz) preserves signal integrity, while the wide supply range (±5V to ±15V) accommodates various system rails. The dual-channel configuration allows simultaneous processing of multiple signals, reducing component count and board space. For best performance, use precision resistors and proper guarding techniques to minimize leakage currents.

Recommended

🔧

Active Filters

The AD8512ARZ's 8 MHz gain bandwidth product and 20 V/µs slew rate enable high-frequency active filter designs. In a 4th-order low-pass filter, the AD8512ARZ provides sufficient loop gain to maintain accuracy up to 1 MHz. Its low offset and noise ensure minimal DC error and noise in the passband. The JFET input stage allows the use of high-value resistors without introducing significant bias current errors. For optimal performance, use low-tolerance capacitors and place the filter components close to the amplifier to minimize parasitic inductance.

Recommended

AD8513ARZ · Analog Devices

🖥️

Data Acquisition Systems

In data acquisition systems, the AD8512ARZ serves as a buffer or gain stage before the ADC. Its low input bias current (1 pA) minimizes errors when driving high-impedance sources, and its low noise (8 nV/√Hz) ensures accurate conversion. The wide bandwidth supports fast sampling rates, while the rail-to-rail output maximizes ADC input range. The dual-channel configuration is ideal for differential or multi-channel acquisition. To achieve 16-bit accuracy, ensure the amplifier's noise and offset are well below the ADC's LSB size, and use proper anti-aliasing filters.

Recommended

AD7606BSTZ · Analog Devices AD7980BRMZ · Analog Devices

🎧

Audio Preamplifiers

The AD8512ARZ's low voltage noise (8 nV/√Hz) and low distortion make it an excellent choice for audio preamplifiers. In a phono preamp, the AD8512ARZ amplifies low-level signals from a cartridge while maintaining a clean signal path. Its wide bandwidth (8 MHz) ensures accurate reproduction of high-frequency audio content, and its high slew rate (20 V/µs) prevents slew-induced distortion. The JFET input provides high input impedance, which is essential for matching high-impedance sources like guitar pickups. For best audio performance, use high-quality passive components and proper power supply decoupling.

Recommended

AD8513ARZ · Analog Devices

🔧

Photodiode Amplifiers

The AD8512ARZ's extremely low input bias current (1 pA) is ideal for photodiode transimpedance amplifiers. In a photodiode circuit, the AD8512ARZ converts the small photocurrent into a voltage with minimal offset error. Its low voltage noise (8 nV/√Hz) ensures high signal-to-noise ratio, even for low light levels. The wide bandwidth supports fast optical signals, and the JFET input minimizes loading on the photodiode. To achieve optimal performance, use a feedback capacitor to compensate for the photodiode's capacitance and maintain stability.

Recommended

AD8513ARZ · Analog Devices

💊

Medical Instrumentation

In medical instrumentation, the AD8512ARZ is used in ECG and EEG amplifiers due to its low noise and low offset. Its low input bias current (1 pA) minimizes electrode polarization effects, and its high common-mode rejection ensures accurate measurement of small bio-signals. The wide supply range allows operation from battery or isolated supplies. The dual-channel configuration is useful for multi-lead monitoring. For safety, ensure proper isolation and use medical-grade power supplies. The AD8512ARZ's reliability and precision make it suitable for diagnostic equipment.

Recommended

AD620ARZ · Analog Devices AD7124-4BRUZ · Analog Devices

Recommended Products Summary

AD620ARZ Analog Devices Used in: Precision Instrumentation, Medical Instrumentation AD7124-4BRUZ Analog Devices Used in: Precision Instrumentation, Medical Instrumentation AD8513ARZ Analog Devices Used in: Active Filters, Audio Preamplifiers, Photodiode Amplifiers AD7606BSTZ Analog Devices Used in: Data Acquisition Systems AD7980BRMZ Analog Devices Used in: Data Acquisition Systems

What is the AD8512ARZ?

The AD8512ARZ is a dual precision JFET-input operational amplifier from Analog Devices. It features low offset voltage, low input bias current, low voltage noise, and low current noise, making it ideal for precision instrumentation and signal conditioning. It comes in an 8-lead SOIC package and operates over a wide supply range.

What is the input offset voltage of AD8512ARZ?

The AD8512ARZ has a typical input offset voltage of 100 µV. This low offset voltage ensures accurate signal processing in precision measurement systems. According to the AD8510/AD8512/AD8513 datasheet, the maximum offset voltage is 400 µV over the industrial temperature range.

What is the input bias current of AD8512ARZ?

The AD8512ARZ has a typical input bias current of 1 pA. This extremely low bias current is a result of the JFET input stage, making the amplifier suitable for high-impedance sources such as photodiodes and other sensors. The maximum bias current is 50 pA over temperature.

What is the voltage noise of AD8512ARZ?

The AD8512ARZ has a voltage noise density of 8 nV/√Hz. This low noise performance, combined with low current noise, makes it suitable for audio and precision measurement applications. The noise is specified at 1 kHz and is a key parameter for low-level signal amplification.

What is the gain bandwidth product of AD8512ARZ?

The AD8512ARZ has a gain bandwidth product of 8 MHz. This wide bandwidth allows the amplifier to handle fast signals with minimal distortion. The slew rate is 20 V/µs, which supports high-speed applications such as active filters and data acquisition systems.

What is the supply voltage range of AD8512ARZ?

The AD8512ARZ operates from a supply voltage range of ±5 V to ±15 V. This wide range provides flexibility in various applications, from battery-powered portable devices to industrial systems. The output can swing within 1 V of the rails, providing good dynamic range.

Is the AD8512ARZ suitable for audio applications?

Yes, the AD8512ARZ is suitable for audio applications due to its low voltage noise of 8 nV/√Hz and low distortion. It is commonly used in audio preamplifiers and active filters where signal integrity is critical. Its wide bandwidth and high slew rate ensure accurate reproduction of audio signals.

Can the AD8512ARZ drive capacitive loads?

The AD8512ARZ is stable with capacitive loads up to 500 pF. For larger capacitive loads, an isolation resistor may be required to maintain stability. This is important in applications where the amplifier drives long cables or high-capacitance inputs.

What is the operating temperature range of AD8512ARZ?

The AD8512ARZ is specified over the industrial temperature range of -40°C to +125°C. This wide temperature range makes it suitable for harsh environments, including automotive and industrial applications. The device maintains its performance across this range.

What is the package of AD8512ARZ?

The AD8512ARZ is available in an 8-lead SOIC package. This surface-mount package is widely used and easy to assemble. The package is RoHS compliant and lead-free, making it suitable for modern manufacturing processes.

Where can I buy AD8512ARZ?

The AD8512ARZ is available from authorized distributors such as DigiKey, Mouser, and Octopart. As of 2026-08-22, it is in stock at DigiKey and Mouser. Pricing starts at approximately $3.50 for single-unit quantities, with volume discounts available.

What is the price of AD8512ARZ?

As of 2026-08-22, the AD8512ARZ is priced at approximately $3.50 for a single unit, $3.15 for 10 units, $2.80 for 100 units, $2.50 for 500 units, and $2.25 for 1000 units. Prices may vary by distributor and quantity.

What is the lead time for AD8512ARZ?

The lead time for AD8512ARZ is typically 1-2 weeks from authorized distributors like DigiKey and Mouser. For larger quantities, lead time may extend to 4-6 weeks. Check with your preferred distributor for current stock and lead time information.

Is AD8512ARZ in stock?

As of 2026-08-22, the AD8512ARZ is in stock at major distributors including DigiKey and Mouser. Availability may vary, so it is recommended to check the distributor's website for real-time inventory.

What is the difference between AD8512ARZ and AD8512AR?

The AD8512ARZ and AD8512AR are functionally identical, but the 'Z' suffix indicates lead-free and RoHS-compliant packaging. The AD8512ARZ is the lead-free version, while the AD8512AR may contain lead. Both are pin-compatible and can be used interchangeably in most designs.

What is the best drop-in replacement for AD8512ARZ?

The best drop-in replacement for AD8512ARZ is the AD8512ARZ-REEL, which is the same device in tape and reel packaging. Other pin-compatible alternatives include the AD8628ARZ and ADA4077-2ARZ from Analog Devices, which offer similar performance. Verify pinout and specifications before substitution.

Can AD8628ARZ replace AD8512ARZ?

Yes, the AD8628ARZ can replace the AD8512ARZ in many applications. Both are dual precision op amps in 8-SOIC packages with similar pinouts. However, the AD8628ARZ has a lower bandwidth of 2 MHz and lower supply current, so verify that these parameters meet your requirements.

What is the best Analog Devices equivalent for AD8512ARZ?

The best Analog Devices equivalent for AD8512ARZ is the AD8628ARZ, which is a dual precision op amp with low offset and low noise. It is pin-compatible and offers similar performance, though with a lower bandwidth. For higher bandwidth, consider the ADA4077-2ARZ.

Where can I download the AD8512ARZ datasheet?

The AD8512ARZ datasheet can be downloaded from the Analog Devices website at https://www.analog.com/media/en/technical-documentation/data-sheets/AD8510_8512_8513.pdf. It is also available from distributor websites like DigiKey and Mouser.

What are the key specifications of AD8512ARZ that engineers should know?

The AD8512ARZ is a dual JFET-input op amp with 8 MHz gain bandwidth, 20 V/µs slew rate, 100 µV offset voltage, 1 pA bias current, and 8 nV/√Hz voltage noise. It operates from ±5V to ±15V supplies and is stable with capacitive loads up to 500 pF. These specs make it ideal for precision instrumentation and audio.

Engineering reference data for AD8512ARZ — comparison, design guidance, and compliance information.

Selection Guide

Choose the AD8512ARZ when you need a dual precision JFET op amp with low offset, low bias current, and low noise for applications like precision instrumentation, active filters, and photodiode amplifiers. If you require even lower offset and noise, consider the ADA4077-2ARZ, but note its higher bias current. For low-power, low-voltage applications, the AD8628ARZ is a better choice, but it has lower bandwidth and slew rate. If you need zero-drift performance, the OPA2188 from Texas Instruments offers ultra-low offset but with lower bandwidth. For a drop-in replacement with identical specs, the AD8512ARZ-REEL is the same die in tape and reel packaging. Always verify pin compatibility and key parameters before substitution.

Comparison with Alternatives

Parameter	This Product	AD8512ARZ-REEL	AD8512AR	AD8628ARZ	ADA4077-2ARZ	OPA2188
Package	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Brand	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Texas Instruments
Number of Channels	2	2	2	2	2	2
Gain Bandwidth Product	8 MHz	8 MHz	8 MHz	2 MHz	3.9 MHz	2 MHz
Slew Rate	20 V/µs	20 V/µs	20 V/µs	1 V/µs	1.2 V/µs	0.8 V/µs
Input Offset Voltage	100 µV	100 µV	100 µV	50 µV	15 µV	0.5 µV
Input Bias Current	1 pA	1 pA	1 pA	30 pA	0.5 nA	150 pA
Voltage Noise	8 nV/√Hz	8 nV/√Hz	8 nV/√Hz	22 nV/√Hz	7 nV/√Hz	8 nV/√Hz
Supply Voltage Range	±5V to ±15V	±5V to ±15V	±5V to ±15V	2.7V to 5V	±2.5V to ±18V	4.5V to 36V

Key Differentiators

Ultra-low input bias current of 1 pA (vs ADA4077-2ARZ)
Higher slew rate of 20 V/µs (vs AD8628ARZ)
Wider supply voltage range (vs AD8628ARZ)

Design Notes

Proper power supply decoupling is critical for the AD8512ARZ. Place 0.1 µF ceramic capacitors close to the V+ and V- pins, and optionally add 10 µF tantalum capacitors for lower frequency decoupling. This minimizes power supply noise and ensures stable operation, especially in high-gain applications.

For optimal performance, use a ground plane and keep the input traces short and shielded. The AD8512ARZ has very low input bias current (1 pA), so minimize leakage paths by cleaning the PCB and using guard rings around the inputs. This is especially important in high-impedance applications like photodiode amplifiers.

Do not exceed the input common-mode voltage range, which is typically ±13 V for ±15 V supplies. Exceeding this range can cause phase reversal and output saturation. Also, the device is stable with capacitive loads up to 500 pF; for larger loads, add an isolation resistor (e.g., 50 Ω) in series with the output to maintain stability.