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Analog Devices Inc. AD8512BRZ-REEL7
- Part No.:
- AD8512BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8512BRZ-REEL7.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,532
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Product details
Overview
AD8512BRZ-REEL7 from Analog Devices is a dual-channel, precision JFET-input operational amplifier optimized for high-impedance sensor signal conditioning and low-noise current measurement. It delivers 400 μV max offset voltage, 8 nV/√Hz voltage noise at 1 kHz, 20 V/μs slew rate, and 8 MHz gain bandwidth - enabling accurate, fast settling (500 ns to 0.1%) in photodiode amplifiers and instrumentation front-ends.
For engineers reviewing the AD8512BRZ-REEL7 datasheet, AD8512BRZ-REEL7 pinout, AD8512BRZ-REEL7 application, or AD8512BRZ-REEL7 equivalent, this page provides verified specifications, SOIC_N package details, dual-opamp circuit role clarification, and validated alternatives for precision analog design.
Technical Context
The AD8512BRZ-REEL7 implements a fully differential JFET input stage with no phase reversal under overvoltage conditions and unity-gain stability across capacitive loads up to 1000 pF. Its input bias current remains ≤75 pA at ±5 V supply and ≤80 pA at ±15 V, supporting high-Z source interfacing without significant error.
It operates over −40°C to +125°C with supply range ±5 V to ±15 V, features 100 dB typical CMRR and 130 dB PSRR, and maintains 0.0005% THD+N at 1 kHz - making it suitable for medical instrumentation, precision filters, and audio preamplification where dc accuracy and dynamic linearity coexist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage (B Grade) | 0.4 mV max at 25°C - ensures ≤1 LSB error in 12-bit systems over full temperature range. |
| Input Bias Current | 25 pA typical at ±15 V - enables use with >1 GΩ source impedances without measurable voltage drop. |
| Voltage Noise Density | 8 nV/√Hz at 1 kHz - critical for preserving SNR in low-level sensor and photodiode amplification. |
| Slew Rate | 20 V/μs - supports clean 10 V step response in <500 ns, matching DAC output settling requirements. |
| Gain Bandwidth Product | 8 MHz - allows stable closed-loop gain ≥10 at 500 kHz, suitable for active filter stages. |
| Supply Current per Amplifier | 2.3 mA typical at ±5 V - balances performance and power efficiency in dual-channel portable instrumentation. |
| Operating Temperature Range | −40°C to +125°C - qualified for industrial and automotive under-hood sensing applications. |
Pinout & Package
AD8512BRZ-REEL7 is housed in an 8-lead narrow SOIC_N (R suffix) package, RoHS-compliant, tape-and-reel format (REEL7), with standard 1.27 mm pitch and 5.0 mm × 6.2 mm footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output channel A; drives loads down to 600 Ω while maintaining rail-to-rail swing. |
| 2 | –IN A | Inverting input of channel A; high-impedance JFET node (12.5 pF differential capacitance). |
| 3 | +IN A | Noninverting input of channel A; matched to –IN A for optimal CMRR and offset rejection. |
| 4 | V– | Negative supply rail connection; supports operation down to −5 V (±5 V min) and up to −15 V (±15 V max). |
| 5 | V+ | Positive supply rail connection; accepts +5 V to +15 V, enabling single-supply or dual-supply configurations. |
| 6 | OUT B | Inverting amplifier output channel B; electrically isolated from OUT A, sharing only supply rails. |
| 7 | –IN B | Inverting input of channel B; independent of channel A, allowing dual-path signal processing. |
| 8 | +IN B | Noninverting input of channel B; pin-compatible with +IN A for symmetrical PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Input voltages exceeding common-mode range (±13.5 V at ±15 V supply) do not invert output polarity - prevents system latch-up in overvoltage transients. |
| Capacitive load drive | Stable with ≥1000 pF in unity gain; eliminates need for external isolation resistors in ADC buffer or cable-driven applications. |
| Low TCVOS | 1 μV/°C typical drift - limits offset shift to <125 μV over −40°C to +125°C, preserving calibration integrity. |
| Fast overload recovery | ≤200 ns recovery from saturation - essential for pulse-amplification and transient-detection circuits. |
| High PSRR/CMRR | 130 dB PSRR and 100 dB CMRR - rejects supply ripple and common-mode interference in noisy industrial environments. |
Applications
| Photodiode Amplification | Precision Current Measurement |
|---|---|
|
Use Scenario: Converting nanoamp-level photocurrent from silicon or InGaAs photodiodes into stable voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with ultra-low input bias current and 8 nV/√Hz noise to maximize SNR. Use Value: Enables sub-picoamp resolution with <0.0005% THD+N, critical for optical spectroscopy and laser power monitoring. |
Use Scenario: Measuring shunt voltage drops across 0.01 Ω to 100 Ω sense resistors in motor control or battery management. IC Role / Device Role / Timing Role: Low-offset, low-drift difference amplifier front-end with 0.4 mV max VOS and 1 μV/°C TCVOS. Use Value: Delivers 12-bit accuracy over full industrial temperature range without recalibration. |
| Medical Instrumentation | Audio Preamplification |
|
Use Scenario: Signal conditioning for ECG, EEG, or pH sensor electrodes requiring high common-mode rejection and low 1/f noise. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with 100 dB CMRR and 2.4 μV p-p 0.1–10 Hz noise. Use Value: Supports diagnostic-grade signal fidelity with no phase reversal during electrode contact anomalies. |
Use Scenario: Low-distortion microphone preamplifier or line-level buffer in studio and portable audio equipment. IC Role / Device Role / Timing Role: Unity-gain stable, low-THD op-amp with 0.0005% distortion and 20 V/μs slew rate. Use Value: Preserves harmonic integrity up to 20 kHz while driving 10 kΩ loads without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134PA | Higher 12 nV/√Hz noise at 1 kHz; 0.5 mV max VOS; 10 MHz GBP; 2.2 mA supply current. | Better audio THD spec (0.00008%), but higher noise limits photodiode use below 100 pA. | Select when ultra-low distortion dominates over low-noise sensor gain. |
| LT1028CS8#PBF | Lower 0.95 nV/√Hz noise; higher 10 mA supply current; ±4 V to ±18 V supply; no guaranteed 125°C operation. | Superior voltage noise for low-source-impedance applications, but excessive power and temp limit exclude portable designs. | Select for lab-grade instrumentation where noise floor is paramount and power/temperature are unconstrained. |
Compared with OPA2134PA and LT1028CS8#PBF, AD8512BRZ-REEL7 uniquely balances ultra-low input bias current (25 pA), low voltage noise (8 nV/√Hz), wide temperature rating (−40°C to +125°C), and low power (2.3 mA), making it the optimal choice for battery-powered, high-impedance, and extended-temperature embedded systems.
Availability
AD8512BRZ-REEL7 is available at Aetrix Electronics and suitable for precision instrumentation, photodiode signal chains, and industrial current-sensing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD8512BRZ-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD851x family was engineered specifically for precision, low-noise, high-input-impedance analog signal conditioning - targeting medical devices, test equipment, and industrial sensors where dc accuracy and dynamic performance must coexist.
FAQ
What is the maximum capacitive load the AD8512BRZ-REEL7 can drive stably in unity gain?
The AD8512BRZ-REEL7 is unconditionally stable driving up to 1000 pF in unity-gain configuration without oscillation or excessive ringing. This capability eliminates the need for external isolation resistors in ADC driver or cable-terminated applications, preserving signal integrity and simplifying layout. Verified per Figure 45–46 and Capacitive Load Drive section of Rev. K datasheet.
Does the AD8512BRZ-REEL7 exhibit phase reversal when input voltages exceed the supply rails?
No. The AD8512BRZ-REEL7 does not suffer from output phase reversal even when input voltages exceed the maximum common-mode range (e.g., ±13.5 V at ±15 V supply). This behavior is confirmed in the Output Phase Reversal section and Figure 40 of the Rev. K datasheet, preventing system lockup during transient overvoltage events.
What is the typical input bias current of the AD8512BRZ-REEL7 at ±5 V supply?
The AD8512BRZ-REEL7 has a typical input bias current of 21 pA at ±5 V supply and 25°C, with a maximum of 75 pA over −40°C to +85°C. This ultra-low value enables direct interfacing with high-impedance sources such as photodiodes, piezoelectric sensors, and pH electrodes without significant offset error.
Is the AD8512BRZ-REEL7 specified for operation at +125°C?
Yes. The AD8512BRZ-REEL7 is fully specified over the extended industrial temperature range of −40°C to +125°C, including all key parameters: offset voltage, input bias current, supply current, and dynamic performance. This qualification is explicitly stated in the General Description and Absolute Maximum Ratings sections of the Rev. K datasheet.
What package type is used for the AD8512BRZ-REEL7?
The AD8512BRZ-REEL7 uses the 8-lead narrow SOIC_N (R suffix) package, measuring 5.0 mm × 6.2 mm with 1.27 mm lead pitch. It is RoHS-compliant and supplied in tape-and-reel format (REEL7), as confirmed in the Ordering Guide and Outline Dimensions sections of the Rev. K datasheet.
AD8512BRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 pA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 2.2mA (x2 Channels)
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8512BRZ-REEL7 FAQ
1.How can I place an order for AD8512BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8512BRZ-REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD8512BRZ-REEL7 reliable?
The price and inventory of AD8512BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8512BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8512BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8512BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8512BRZ-REEL7?
AD8512BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8512BRZ-REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD8512BRZ-REEL7?
For technical support, including AD8512BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8512BRZ-REEL7 requirements.
6.How does Aetrix verify that AD8512BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8512BRZ-REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD8512BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8512BRZ-REEL7?
All AD8512BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8512BRZ-REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD8512BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8512BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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