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Analog Devices Inc. AD8667ARMZ-REEL
- Part No.:
- AD8667ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8667ARMZ-REEL.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,212
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Product details
Overview
AD8667ARMZ-REEL 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, 300 fA typical input bias current, and operates from 5 V to 16 V single supply - enabling accurate photodiode amplification and electrometer-grade transimpedance stages.
For engineers reviewing the AD8667ARMZ-REEL datasheet, AD8667ARMZ-REEL pinout, AD8667ARMZ-REEL application, or AD8667ARMZ-REEL equivalent, this page provides verified package mapping (8-lead MSOP), validated dual-amplifier circuit role, confirmed rail-to-rail output swing at 1 mA load, temperature-stable offset drift (1.5–5 µV/°C), and real-world use cases in pH/ORP meters and low-power ADC drivers.
Technical Context
The AD8667ARMZ-REEL implements DigiTrim® laser trimming for precision offset calibration across −40°C to +125°C, supporting stable operation in industrial and medical instrumentation. Its CMOS input stage enables femtoampere-level bias current and high common-mode rejection (76–109 dB), critical for transimpedance amplifier stability with high-value feedback resistors.
Designed for unity-gain stability with 520–540 kHz gain-bandwidth product and 60–64° phase margin, it maintains low closed-loop output impedance (<120 Ω at 100 kHz) while delivering rail-to-rail output swing - sinking 1 mA within 100 mV of V− and sourcing 1 mA within 150 mV of V+ at 16 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 16 V single supply - supports wide-range battery-powered and industrial rails without dual-supply complexity. |
| Input Offset Voltage | Max 175 µV at 5 V supply - ensures <±1 LSB error in 16-bit systems with 10 V full-scale range. |
| Input Bias Current | Typ 300 fA at 25°C - enables >10 GΩ effective source impedance handling in electrometer and photodiode applications. |
| Voltage Noise Density | 23 nV/√Hz at 1 kHz - minimizes Johnson noise contribution in high-gain, low-frequency sensor front ends. |
| Output Swing (RL = 1 mA) | Rail-to-rail: VOL ≤ 100 mV above V−, VOH ≥ 15.8 V at 16 V supply - maximizes dynamic range into 12-bit+ ADCs. |
| Gain-Bandwidth Product | 540 kHz at 16 V - sufficient for DC-coupled pH probe buffering and 100 Hz–1 kHz active filter design. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive sensors and industrial process control environments. |
Pinout & Package
AD8667ARMZ-REEL is housed in an 8-lead MSOP (RM-8) package with exposed pad, measuring 3.0 mm × 3.0 mm × 1.1 mm. The exposed pad must be soldered to PCB ground or left unconnected per datasheet Note 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or next-stage input; rail-to-rail capable up to 1 mA. |
| 2 | –IN A | Inverting input of Amplifier A - high-impedance node requiring guarded layout for femtoampere bias current integrity. |
| 3 | +IN A | Non-inverting input of Amplifier A - referenced to system ground or virtual ground in single-supply configurations. |
| 4 | V− | Negative supply terminal - connects to ground or negative rail; exposed pad may be tied here for thermal/EMI improvement. |
| 5 | +IN B | Non-inverting input of Amplifier B - electrically isolated from Amplifier A; shares same V− and V+ rails. |
| 6 | –IN B | Inverting input of Amplifier B - independent high-impedance node; no internal coupling to Amplifier A inputs. |
| 7 | OUT B | Amplifier B output - fully independent channel; identical AC/DC specs to OUT A. |
| 8 | V+ | Positive supply terminal - accepts 5 V to 16 V; PSRR >95 dB ensures immunity to supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® offset calibration | Laser-trimmed input offset ≤175 µV (max) over temperature - eliminates need for external nulling circuitry in precision buffers. |
| Rail-to-rail output stage | Drives loads to within 100 mV of either rail at 1 mA - preserves full ADC input range in 3.3 V or 5 V data acquisition systems. |
| Femtoampere input bias | 300 fA typical at 25°C - enables stable operation with >1 GΩ source impedances in pH electrode and piezoelectric sensor interfaces. |
| Low 1/f noise | 2.5 µV p-p (0.1 Hz to 10 Hz) - critical for DC-stable measurements in medical diagnostics and environmental monitoring. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in gain-of-1 reference buffers and I/V converters. |
Applications
| Photodiode Amplification | Electrometer Applications |
|---|---|
|
Use Scenario: Converting weak photocurrent (pA–nA) from silicon photodiodes into measurable voltage with minimal added noise. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front end with ultra-low input bias current and 23 nV/√Hz noise floor. Use Value: Enables >120 dB dynamic range in optical smoke detectors and spectrophotometers by minimizing input current error and Johnson noise. |
Use Scenario: Measuring ultra-low leakage currents in insulation resistance testers and semiconductor wafer probers. IC Role / Device Role / Timing Role: Electrometer-grade buffer with 300 fA input bias and guarded input traces. Use Value: Supports sub-picoampere current resolution without guard-ring amplifiers or chopper stabilization overhead. |
| pH and ORP Meters | Low-Power ADC Drivers |
|
Use Scenario: Conditioning mV-level signals from glass pH electrodes in portable field instruments with battery life constraints. IC Role / Device Role / Timing Role: High-input-impedance, low-drift DC buffer between electrode and SAR ADC input. Use Value: Delivers <0.01 pH unit error over 0–100°C via 1.5 µV/°C max TCVOS and rail-to-rail output swing into 10 kΩ ADC input. |
Use Scenario: Driving the input of 12–16 bit SAR ADCs in wireless sensor nodes where supply current must stay below 300 µA per channel. IC Role / Device Role / Timing Role: Low-power, low-noise driver with 275 µA max supply current per amplifier. Use Value: Enables continuous 1 kSPS sampling for 10+ years on coin-cell batteries while maintaining ENOB >11 bits. |
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-REEL | Higher precision (25 µV max VOS), lower noise (8 nV/√Hz), but higher supply current (450 µA) and no rail-to-rail output. | Better for lab-grade instrumentation requiring sub-µV offset; unsuitable for single-supply 3.3 V ADC drivers due to limited output swing. | Select OP2177ARZ-REEL when absolute offset accuracy outweighs power and rail-to-rail requirements. |
| ADA4522-2ARMZ | Zero-drift architecture (0.005 µV/°C TCVOS), lower 1/f noise, but requires dual supply and has higher quiescent current (700 µA). | Ideal for DC-coupled strain gauge bridges needing nanovolt-level stability; incompatible with single-supply 5 V sensor nodes. | Choose ADA4522-2ARMZ only for zero-drift-critical applications where dual supply and higher power are acceptable. |
Compared with OP2177ARZ-REEL and ADA4522-2ARMZ, AD8667ARMZ-REEL uniquely balances rail-to-rail operation, femtoampere bias, and sub-300 µA supply current - making it the optimal dual op amp for battery-powered, high-impedance, single-supply sensor interfaces.
Availability
AD8667ARMZ-REEL is available at Aetrix Electronics and suitable for pH/ORP meter production, photodiode-based environmental sensors, and low-power industrial data loggers requiring stable component supply across extended temperature ranges.
Supply support for AD8667ARMZ-REEL 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 AD866x family was designed specifically for precision, low-power, high-impedance signal conditioning in portable and harsh-environment instrumentation - bridging the performance gap between JFET and CMOS op amps.
FAQ
What is the maximum supply voltage rating for AD8667ARMZ-REEL?
The AD8667ARMZ-REEL has an absolute maximum supply voltage of 18 V, with recommended operating range from 5 V to 16 V single supply. Operation beyond 16 V is not characterized and may degrade long-term reliability or violate absolute maximum ratings specified in the datasheet.
Does AD8667ARMZ-REEL support true rail-to-rail input common-mode range?
No - AD8667ARMZ-REEL features rail-to-rail *output* swing but not rail-to-rail input. Its input common-mode range extends from 0.2 V above V− to 0.2 V below V+ at 5 V supply, and to 0.2 V above V− and 14.5 V below V+ at 16 V supply, as confirmed in Table 1 and Table 2 of the Rev. D datasheet.
Is the exposed pad on the AD8667ARMZ-REEL's MSOP package required to be connected?
No - per datasheet Note 2, the exposed pad on AD8667ARMZ-REEL may be connected to V− for improved thermal performance and EMI suppression, or left unconnected. It must never be tied to any other potential, including ground if V− is not ground.
Can AD8667ARMZ-REEL drive capacitive loads directly?
AD8667ARMZ-REEL is unity-gain stable but exhibits increasing overshoot with capacitive loads >200 pF, as shown in Figure 25 and Figure 28. For loads >100 pF, a series resistor (10–100 Ω) at the output is recommended to maintain stability without degrading bandwidth significantly.
What is the guaranteed minimum open-loop gain for AD8667ARMZ-REEL?
The AD8667ARMZ-REEL guarantees minimum large-signal voltage gain (AVO) of 106 dB at RL = 2 kΩ and VOUT = 0.5 V to 4.5 V (5 V supply), and 106 dB at RL = 2 kΩ and VOUT = 0.5 V to 15.5 V (16 V supply), per Tables 1 and 2 in the Rev. D datasheet.
AD8667ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
AD8667ARMZ-REEL FAQ
1.How can I place an order for AD8667ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8667ARMZ-REEL 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 AD8667ARMZ-REEL reliable?
The price and inventory of AD8667ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8667ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8667ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8667ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8667ARMZ-REEL?
AD8667ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8667ARMZ-REEL 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 AD8667ARMZ-REEL?
For technical support, including AD8667ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8667ARMZ-REEL requirements.
6.How does Aetrix verify that AD8667ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8667ARMZ-REEL 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 AD8667ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8667ARMZ-REEL?
All AD8667ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8667ARMZ-REEL, 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 AD8667ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD8667ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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