My Inquiry
My Account
Analog Devices Inc. AD8666ARMZ-REEL
- Part No.:
- AD8666ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8666ARMZ-REEL.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,834
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8666ARMZ-REEL from Analog Devices is a dual-channel, rail-to-rail output operational amplifier optimized for precision sensor signal conditioning and reference buffering in industrial and automotive systems. It delivers 4 MHz gain bandwidth, 8 nV/√Hz voltage noise at 10 kHz, 2.5 mV max input offset voltage, and operates from single 5 V to 16 V or dual ±2.5 V to ±8 V supplies. Its low 1 pA max input bias current enables high-impedance photodiode and physiological measurement front-ends.
For engineers reviewing the AD8666ARMZ-REEL datasheet, AD8666ARMZ-REEL pinout, AD8666ARMZ-REEL application, or AD8666ARMZ-REEL equivalent, key selection criteria include rail-to-rail output swing under load, input bias current stability over temperature, supply rejection above 94 dB across −40°C to +125°C, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AD8666ARMZ-REEL implements a precision bipolar input stage with unity-gain stable compensation, enabling direct use in ADC driver, level-shifting, and active filter configurations without external compensation. Its rail-to-rail output stage sustains <50 mV VOL and >15.9 V VOH at 1 mA load under 16 V supply, while maintaining 73° phase margin and 3.5 V/μs slew rate.
Designed for extended industrial and automotive operation (−40°C to +125°C), it features matched channel characteristics-channel separation of −115 dB at 10 kHz-and robust PSRR (98–115 dB) and CMRR (90–110 dB) across full common-mode range (−0.1 V to +14.0 V at 16 V supply).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 4 MHz - supports stable closed-loop operation up to 100 kHz with gain ≥40, suitable for anti-aliasing filters and fast-settling ADC drivers. |
| Input Offset Voltage | 2.5 mV max - ensures ≤0.025% error in 10 V full-scale reference buffers and sensor amplifiers without trimming. |
| Input Bias Current | 1 pA max - enables accurate amplification of signals from >1 GΩ source impedances (e.g., photodiodes, pH electrodes) with minimal DC error. |
| Rail-to-Rail Output Swing | VOL = 40 mV, VOH = 15.96 V @ 16 V supply - delivers full dynamic range into 2 kΩ loads, critical for driving SAR ADC inputs directly. |
| Supply Range | 5 V to 16 V single or ±2.5 V to ±8 V dual - matches high-voltage industrial sensors and legacy 12 V/15 V analog subsystems without level translation. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control applications requiring guaranteed performance across extreme ambient conditions. |
| Voltage Noise Density | 8 nV/√Hz @ 10 kHz - maintains signal integrity in audio preamps and medical instrumentation where mid-band noise dominates SNR. |
Pinout & Package
AD8666ARMZ-REEL is housed in an 8-lead MSOP (RM-8) package, 3.0 mm × 3.0 mm × 0.85 mm body, with exposed pad for thermal enhancement. Pin 1 is marked by a dot; device orientation follows JEDEC MO-187-AA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 140 mA short-circuit current; rail-to-rail swing enables full utilization of 16 V supply headroom. |
| 2 | −IN A | Inverting input of Amplifier A - high-impedance node (1 pA bias) minimizes loading on precision feedback networks and sensor sources. |
| 3 | +IN A | Non-inverting input of Amplifier A - common-mode range extends to within 100 mV of rails, supporting true single-supply operation. |
| 4 | V− | Negative supply pin - accepts ground or negative rail; must be decoupled locally to suppress PSRR degradation at high frequencies. |
| 5 | +IN B | Non-inverting input of Amplifier B - electrically isolated from Channel A; enables dual-path signal processing without crosstalk (−115 dB). |
| 6 | −IN B | Inverting input of Amplifier B - identical electrical specs to Pin 2; supports matched differential pair configurations. |
| 7 | OUT B | Amplifier B output - independently buffered; allows simultaneous drive of two separate signal chains (e.g., ADC input + reference buffer). |
| 8 | V+ | Positive supply pin - accepts 5–16 V; internal regulation ensures stable biasing across full supply range and temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers <50 mV low-side and <100 mV high-side saturation voltage at 1 mA load, preserving >99% of 16 V supply range for signal fidelity. |
| Low input bias current (1 pA max) | Enables stable DC-coupled gain in >100 MΩ sensor interfaces (e.g., piezoresistive pressure transducers) without drift-inducing leakage paths. |
| High PSRR (115 dB typical) | Rejects power supply ripple up to 100 kHz, eliminating need for ultra-low-noise LDOs in battery-powered portable medical devices. |
| Unity-gain stable | Operates reliably with gain = 1 without external compensation, simplifying design of voltage followers for high-impedance reference buffers. |
| Automotive-qualified variant available | AD8666WARZ meets AEC-Q100 Grade 1 requirements; AD8666ARMZ-REEL shares identical electrical specs but is rated for industrial temp range only. |
Applications
| Sensor Amplification | Reference Buffering |
|---|---|
|
Use Scenario: Amplifying low-level output from a 100 kΩ bridge-based strain gauge in factory automation equipment. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with fixed-gain configuration and DC-coupled output. Use Value: 1 pA input bias current prevents bridge imbalance errors; 2.5 mV offset contributes <0.025% FS error at 10 V span. |
Use Scenario: Buffering a 2.5 V precision voltage reference for a 16-bit SAR ADC in motor control feedback loop. IC Role / Device Role / Timing Role: Low-output-impedance unity-gain follower isolating reference from ADC input capacitance and digital switching noise. Use Value: Rail-to-rail output ensures full 2.5 V swing into 10 kΩ load; 8 nV/√Hz noise avoids degrading ADC ENOB below 15.5 bits. |
| Photodiode Signal Conditioning | Physiological Measurement Front-End |
|
Use Scenario: Transimpedance amplification of 100 pA–10 nA photocurrent from a UV detection diode in environmental monitoring. IC Role / Device Role / Timing Role: Low-noise, low-bias-current TIA with 10 MΩ feedback resistor and 4 MHz bandwidth. Use Value: 1 pA bias current eliminates dark-current-induced offset; 4 MHz GBP supports 100 ns pulse response for fast UV event detection. |
Use Scenario: Amplifying ECG electrode signals (0.5–5 mV, <100 Hz bandwidth) in portable patient monitors. IC Role / Device Role / Timing Role: First-stage differential amplifier with high CMRR and low 1/f noise for biopotential acquisition. Use Value: 110 dB CMRR rejects 50/60 Hz mains interference; 2.5 mV offset allows DC-coupled baseline tracking without AC coupling artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8666ARZ-REEL | Same die, SOIC-8 package (R-8); θJA = 158°C/W vs. 210°C/W for MSOP-8; 5.0 mm × 4.0 mm footprint. | Better thermal dissipation in high-power-density boards; less suitable for ultra-compact layouts where MSOP-8 saves >40% board area. | Select AD8666ARZ-REEL when thermal management prioritizes lower junction rise or when legacy SOIC footprints are fixed. |
| OPA2333AIDR | Zero-drift architecture; 0.02 μV/°C offset drift vs. 10 μV/°C for AD8666ARMZ-REEL; higher 350 nA supply current. | Superior long-term DC stability in unattended test equipment; higher quiescent current limits battery life in portable designs. | Choose OPA2333AIDR for microvolt-level DC accuracy over temperature; retain AD8666ARMZ-REEL for low-noise, low-power, cost-sensitive industrial sensing. |
Compared with AD8666ARZ-REEL, AD8666ARMZ-REEL trades thermal performance for 42% smaller PCB area and improved high-frequency layout parasitics; versus OPA2333AIDR, it offers 350× lower supply current and superior mid-band noise, at the expense of sub-microvolt offset stability.
Availability
AD8666ARMZ-REEL is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive cabin control modules, and portable medical instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AD8666ARMZ-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, with R&D and manufacturing operations worldwide.
The AD866x family was developed to deliver JFET-amplifier-level input impedance and noise performance in a cost-effective CMOS process, targeting precision signal conditioning in industrial, medical, and automotive systems operating from 5 V to 16 V rails.
FAQ
What is the maximum supply voltage rating for AD8666ARMZ-REEL?
The AD8666ARMZ-REEL has an absolute maximum supply voltage of 18 V, with recommended operating range from 5 V to 16 V for single-supply use or ±2.5 V to ±8 V for dual-supply operation. Exceeding 16 V during normal operation risks exceeding internal bias limits and degrading long-term reliability, though transient spikes up to 18 V are tolerated per Absolute Maximum Ratings.
Does AD8666ARMZ-REEL support rail-to-rail input common-mode range?
No, AD8666ARMZ-REEL supports rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode voltage range extends from −0.1 V to +14.0 V at 16 V supply, meaning it operates down to 100 mV below ground and up to 2 V below V+, not to the rails. This limitation must be considered in single-supply configurations where input signals approach GND or V+.
Can AD8666ARMZ-REEL drive capacitive loads without oscillation?
AD8666ARMZ-REEL is unity-gain stable and can safely drive ≤100 pF capacitive loads without external isolation resistance. For loads >100 pF, a series resistor (typically 10–50 Ω) between amplifier output and capacitor is required to maintain 73° phase margin and prevent peaking or ringing, as confirmed by Figure 21 (Small-Signal Overshoot vs. Load Capacitance) in the datasheet.
Is AD8666ARMZ-REEL qualified for automotive applications?
No, AD8666ARMZ-REEL is specified for the extended industrial temperature range (−40°C to +125°C) but is not AEC-Q100 qualified. For automotive use, Analog Devices offers the AD8666WARZ variant, which undergoes controlled manufacturing and additional reliability testing per Grade 1 requirements. Electrical specifications may differ slightly between industrial and automotive versions.
What is the typical supply current per amplifier in AD8666ARMZ-REEL at 5 V supply?
At 5 V supply and 25°C, the typical supply current per amplifier in AD8666ARMZ-REEL is 1.25 mA (1.1–1.4 mA range). Over the full −40°C to +125°C range, supply current increases to a maximum of 2.0 mA per amplifier, as shown in Figure 38 (Supply Current vs. Temperature) and Table 1.
AD8666ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- 3.5V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 1.15mA (x2 Channels)
- Current - Output / Channel:
- 140 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
AD8666ARMZ-REEL FAQ
1.How can I place an order for AD8666ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8666ARMZ-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 AD8666ARMZ-REEL reliable?
The price and inventory of AD8666ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8666ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8666ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8666ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8666ARMZ-REEL?
AD8666ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8666ARMZ-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 AD8666ARMZ-REEL?
For technical support, including AD8666ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8666ARMZ-REEL requirements.
6.How does Aetrix verify that AD8666ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8666ARMZ-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 AD8666ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8666ARMZ-REEL?
All AD8666ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8666ARMZ-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 AD8666ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD8666ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8666ARMZ-REEL Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
