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Analog Devices Inc. AD8667ARZ-REEL7
- Part No.:
- AD8667ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8667ARZ-REEL7.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,114
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Product details
Overview
AD8667ARZ-REEL7 from Analog Devices is a dual, rail-to-rail output, precision CMOS operational amplifier optimized for low-noise, low-input-bias-current signal conditioning in high-impedance sensor interfaces. It delivers 175 µV max offset voltage, 23 nV/√Hz voltage noise, and 300 fA typical input bias current at 5 V supply, operating from 5 V to 16 V. It is widely deployed in photodiode amplification and pH meter front ends.
For engineers reviewing the AD8667ARZ-REEL7 datasheet, AD8667ARZ-REEL7 pinout, AD8667ARZ-REEL7 application, or AD8667ARZ-REEL7 equivalent, key selection criteria include guaranteed 175 µV max VOS over temperature, rail-to-rail output swing within 25 mV of rails at 100 µA load, and specified operation across −40°C to +125°C industrial range.
Technical Context
The AD8667ARZ-REEL7 implements Analog Devices' DigiTrim® trimming for precision offset calibration and uses a CMOS input stage to achieve femtoampere-level input bias current. Its unity-gain stable architecture supports direct use in transimpedance and buffer configurations without external compensation.
It operates from single supplies (5 V–16 V) or split supplies (±2.5 V to ±8 V), with rail-to-rail output delivering full dynamic range into low-frequency ADCs. The device maintains 100 dB CMRR and 95 dB PSRR across its full supply range, enabling robust performance in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | Max 175 µV at 25°C; ensures ≤0.5 mV error in 10 V full-scale precision gain stages. |
| Input Bias Current | Typ 300 fA at 25°C; enables accurate amplification of picoamp-level photodiode or electrometer currents. |
| Voltage Noise Density | 23 nV/√Hz at 1 kHz; supports low-noise front ends for sub-mV signal extraction. |
| Supply Current per Amp | Max 275 µA at 5 V; allows dual-channel operation under 600 µA total, suitable for battery-powered sensors. |
| Output Swing | Rail-to-rail: VOL = 25 mV, VOH = 4.97 V at 100 µA load (5 V supply); preserves >99% dynamic range for 12-bit+ ADC drivers. |
| Gain Bandwidth | 520 kHz typical; sufficient for DC–100 Hz sensor conditioning and active filter implementation. |
| Operating Temp Range | −40°C to +125°C; qualified for under-hood automotive, industrial process control, and medical diagnostic equipment. |
Pinout & Package
AD8667ARZ-REEL7 is housed in an 8-lead SOIC_N (R-8) package with exposed pad not connected internally. Pin 1 is marked by a beveled corner; pins 1–4 serve Channel A, pins 5–8 serve Channel B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; drives loads up to ±7 mA short-circuit current. |
| 2 | –IN A | Inverting input for Channel A; high-impedance CMOS node (300 fA bias). |
| 3 | +IN A | Non-inverting input for Channel A; common-mode range extends to V– and V+ rails. |
| 4 | V– | Negative supply rail; must be connected to ground or negative rail; exposed pad may connect here. |
| 5 | +IN B | Non-inverting input for Channel B; electrically isolated from Channel A with >120 dB channel separation at 1 kHz. |
| 6 | –IN B | Inverting input for Channel B; identical bias and noise specs as Channel A. |
| 7 | OUT B | Amplifier B output; independent output stage with same rail-to-rail swing capability. |
| 8 | V+ | Positive supply rail; supports 5 V to 16 V operation; PSRR ≥95 dB rejects supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® offset calibration | Guarantees ≤175 µV max VOS at 25°C and ≤500 µV over full −40°C to +125°C range-enables one-time system calibration. |
| CMOS input stage | 300 fA typical IB enables stable biasing of >1 GΩ source impedances without significant voltage error. |
| Rail-to-rail output | Drives within 25 mV of V– and 30 mV of V+ at 100 µA load-maximizes usable ADC input range in single-supply systems. |
| Wide supply range | Operates from 5 V to 16 V single supply or ±2.5 V to ±8 V dual supply-supports legacy 5 V and modern 12 V industrial rails. |
| Low power precision | 275 µA per amplifier at 5 V enables dual-channel operation below 600 µA-ideal for energy-constrained remote sensors. |
Applications
| Photodiode Amplification | pH and ORP Meter Front End |
|---|---|
Use Scenario: Converting nanoamp-level photocurrent from silicon or InGaAs photodiodes into measurable voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with ultra-low input bias current and low voltage noise. Use Value: 300 fA IB minimizes dark current error; 23 nV/√Hz noise preserves signal integrity for low-light detection. |
Use Scenario: Conditioning mV-level electrode potentials from glass pH or ORP probes in chemical analyzers. IC Role / Device Role / Timing Role: High-input-impedance buffer isolating high-Z probe from downstream circuitry. Use Value: Input impedance >1013 Ω prevents probe loading; 175 µV VOS ensures <0.1 pH unit measurement error. |
| Low-Power ADC Driver | Medical Diagnostic Instrumentation |
Use Scenario: Driving SAR or sigma-delta ADC inputs in portable ECG, glucose, or pressure monitors. IC Role / Device Role / Timing Role: Precision gain and level-shift stage preceding 12–16-bit converters. Use Value: Rail-to-rail output delivers full-scale swing; 275 µA supply current extends battery life in wearable devices. |
Use Scenario: Signal conditioning in portable ultrasound front ends, infusion pump pressure sensors, and patient monitoring modules. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier in analog front end (AFE) for biopotential acquisition. Use Value: 1.5 µV/°C TCVOS limits thermal drift; −40°C to +125°C rating supports sterilization and extended field operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP2177ARZ | Higher precision (25 µV max VOS), bipolar input (2 nA IB), 1.3 mA supply current. | Better offset but unsuitable for >100 MΩ sources due to higher bias current. | Select OP2177ARZ only when ultra-low offset dominates over input impedance and power constraints. |
| ADA4625-2ARZ | Faster (80 MHz GBW), lower noise (7.2 nV/√Hz), higher supply current (3.4 mA), JFET input (10 pA IB). | Overqualified for DC/low-frequency sensor buffering; adds cost and power where unnecessary. | Choose ADA4625-2ARZ only if bandwidth >1 MHz or sub-10 nV/√Hz noise is required. |
Compared with OP2177ARZ and ADA4625-2ARZ, AD8667ARZ-REEL7 uniquely balances femtoampere input bias, micovolt-level offset, and sub-300 µA power in a dual SOIC package-making it optimal for high-impedance, battery-operated, wide-temperature sensor interfaces where speed is secondary to precision and efficiency.
Availability
AD8667ARZ-REEL7 is available at Aetrix Electronics and suitable for photodiode amplification, pH/ORP meter design, and low-power medical sensor signal conditioning requiring stable component supply across industrial and medical production cycles.
Supply support for AD8667ARZ-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, serving industrial, automotive, communications, and healthcare markets.
The AD866x family was designed specifically for precision, low-power, high-impedance sensor signal conditioning-targeting applications where JFET amplifiers were previously required but CMOS reliability and lower cost were needed.
FAQ
What is the maximum supply voltage for AD8667ARZ-REEL7?
The AD8667ARZ-REEL7 has an absolute maximum supply voltage of 18 V, with recommended operation from 5 V to 16 V. Operation at 16 V is fully characterized in the datasheet, including output swing, noise, and bias current specifications-enabling compatibility with 12 V industrial rails and legacy 15 V systems.
Does AD8667ARZ-REEL7 support rail-to-rail input?
No, AD8667ARZ-REEL7 features rail-to-rail *output* only. Its input common-mode range extends to 0.2 V above V– and 1.5 V below V+, as specified in Table 1 (VCM = 0.2 V to 3.0 V at 5 V supply). This allows near-rail input operation but excludes direct connection to V+ in single-supply configurations.
Is the exposed pad on AD8667ARZ-REEL7 internally connected?
No-the exposed pad on AD8667ARZ-REEL7 (SOIC_N package) is not electrically connected to any internal node. Per the datasheet Note 2, it may be connected to V– for improved thermal performance or left unconnected. It must never be tied to V+ or floating without thermal consideration.
What is the typical input offset voltage drift of AD8667ARZ-REEL7?
The AD8667ARZ-REEL7 has a guaranteed maximum offset voltage drift of 5 µV/°C over −40°C to +125°C, with typical performance at 1.5 µV/°C. This low drift ensures minimal calibration drift in thermally unstable environments such as industrial enclosures or portable medical devices.
Can AD8667ARZ-REEL7 drive capacitive loads directly?
AD8667ARZ-REEL7 is unity-gain stable but exhibits increasing overshoot with capacitive loads >100 pF, as shown in Figure 25. For loads >200 pF, external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to maintain stability without compromising DC accuracy.
AD8667ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 540 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 230µA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8667ARZ-REEL7 FAQ
1.How can I place an order for AD8667ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8667ARZ-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 AD8667ARZ-REEL7 reliable?
The price and inventory of AD8667ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8667ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8667ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8667ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8667ARZ-REEL7?
AD8667ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8667ARZ-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 AD8667ARZ-REEL7?
For technical support, including AD8667ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8667ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8667ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8667ARZ-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 AD8667ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8667ARZ-REEL7?
All AD8667ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8667ARZ-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 AD8667ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8667ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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