My Inquiry
My Account
Analog Devices Inc. ADA4666-2ARMZ-R7
- Part No.:
- ADA4666-2ARMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADA4666-2ARMZ-R7.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,604
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADA4666-2ARMZ-R7 from Analog Devices is a dual CMOS rail-to-rail input/output operational amplifier optimized for low-power, high-voltage, and wide-supply applications. It delivers 4 MHz gain bandwidth, 725 µA supply current per amplifier at 18 V, 2.2 mV max offset voltage over full common-mode range, and operates from 3 V to 18 V single or ±1.5 V to ±9 V dual supplies. It is used in precision current shunt monitors and battery-powered medical instrumentation.
For engineers reviewing the ADA4666-2ARMZ-R7 datasheet, ADA4666-2ARMZ-R7 pinout, ADA4666-2ARMZ-R7 application, or ADA4666-2ARMZ-R7 equivalent, key selection criteria include rail-to-rail I/O swing at 18 V, ultra-low input bias current (15 pA max), temperature-stable offset drift (0.6–3.1 µV/°C), and guaranteed performance across −40°C to +125°C.
Technical Context
The ADA4666-2ARMZ-R7 employs a CMOS input stage enabling 15 pA max input bias current and >10 GΩ input resistance, paired with a rail-to-rail output stage delivering VOH ≥17.94 V and VOL ≤40 mV at 18 V with 10 kΩ load. Its unity-gain stable architecture supports closed-loop bandwidths up to 2.1 MHz and 60° phase margin.
It features integrated EMI rejection (up to 60 dB at 2.4 GHz), low 18 nV/√Hz voltage noise at 1 kHz, and robust channel separation (≥80 dB) - all specified across 3 V, 10 V, and 18 V supply conditions and the extended industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V single or ±1.5 V to ±9 V dual - enables direct interface with 12 V/15 V industrial rails and 3.3 V/5 V logic without level shifting. |
| Gain Bandwidth Product | 4 MHz typical - supports stable unity-gain and AV = 100 configurations for active filters and sensor signal conditioning. |
| Input Offset Voltage | 2.2 mV max over full common-mode range - ensures <0.1% error in 12-bit precision current sensing at 18 V. |
| Supply Current per Amp | 725 µA max at 18 V - enables dual-channel amplification in space-constrained, battery-operated devices with <1.5 mW total quiescent power. |
| Input Bias Current | 15 pA max - preserves signal integrity in high-impedance pH or photodiode sensor interfaces without significant DC error. |
| Rail-to-Rail I/O | Input: 0 V to VS; Output: within 25 mV of rails at 10 kΩ - maximizes dynamic range in single-supply systems like portable ECG front-ends. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive sensors and industrial motor control feedback loops. |
Pinout & Package
ADA4666-2ARMZ-R7 is packaged in an 8-lead MSOP (3 mm × 3 mm) with exposed pad. The exposed pad is not electrically connected and may be left floating or tied to V− for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Amplifier A output | Drives external load with rail-to-rail swing; requires local 100 nF bypass capacitor near V+ and V−. |
| −IN A (Pin 2) | Inverting input, Channel A | High-impedance node; sensitive to PCB leakage - guard ring recommended for <1 pA bias-critical designs. |
| +IN A (Pin 3) | Non-inverting input, Channel A | Accepts signals from 0 V to VS; matched to −IN A for CMRR >77 dB over temperature. |
| V− (Pin 4) | Negative supply rail | Reference for both amplifiers; exposed pad connection improves thermal resistance to 45°C/W. |
| +IN B (Pin 5) | Non-inverting input, Channel B | Independent of Channel A; enables dual-sensor buffering without crosstalk (CS ≥80 dB). |
| −IN B (Pin 6) | Inverting input, Channel B | Electrically isolated from Channel A inputs; supports differential pair configuration with matched layout. |
| OUT B (Pin 7) | Amplifier B output | Capable of sourcing/sinking 40 mA continuously; decoupling required to maintain stability with capacitive loads. |
| V+ (Pin 8) | Positive supply rail | Accepts up to 20.5 V absolute max; PSRR ≥120 dB minimizes supply ripple coupling into output. |
Key Features
| Feature | Design Value |
|---|---|
| Low power at high voltage | 725 µA per amplifier at 18 V enables dual-channel operation in 12 V systems with <1.5 mW total quiescent dissipation. |
| Rail-to-rail input and output | Full 0 V to 18 V input range and output swing within 25 mV of rails preserves signal headroom in single-supply data acquisition. |
| Ultra-low input bias current | 15 pA max allows direct interfacing with >100 MΩ source impedances (e.g., piezoelectric sensors) without significant offset error. |
| EMI immunity | 60 dB rejection at 2.4 GHz prevents RF-induced errors in wireless-adjacent medical or industrial equipment. |
| Extended temperature operation | Specified from −40°C to +125°C with guaranteed offset drift ≤3.1 µV/°C - suitable for engine control and downhole sensing. |
Applications
| Current Shunt Monitoring | Active Filter Design |
|---|---|
Use Scenario: High-side current measurement in 12 V battery management systems with 50 mΩ shunt resistor. IC Role / Device Role / Timing Role: Precision difference amplifier with rail-to-rail output driving ADC input directly. Use Value: 2.2 mV max VOS ensures <0.2% full-scale error at 1 A sense current; 4 MHz GBW supports fast transient detection. | Use Scenario: 2nd-order Sallen-Key low-pass filter for anti-aliasing before 1 MSPS SAR ADC. IC Role / Device Role / Timing Role: Unity-gain stable buffer and gain stage with low noise (18 nV/√Hz) and minimal phase shift. Use Value: 60° phase margin and 2.1 MHz −3 dB bandwidth enable stable 100 kHz cutoff design without external compensation. |
| Portable Medical Equipment | Battery-Powered Instrumentation |
Use Scenario: Front-end amplifier for dry-electrode ECG with high common-mode interference. IC Role / Device Role / Timing Role: Low-noise, high-CMRR (≥77 dB) buffer isolating electrode signals from noisy digital subsystems. Use Value: 15 pA input bias avoids polarization errors on skin-contact electrodes; EMI rejection suppresses Bluetooth/WiFi artifacts. | Use Scenario: Signal conditioning for handheld multimeter measuring µA-level leakage currents. IC Role / Device Role / Timing Role: Ultra-high-input-impedance transimpedance amplifier with sub-mV offset. Use Value: 10 GΩ input resistance and 2.2 mV VOS enable accurate 100 nA–100 µA measurements without calibration drift. |
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 |
|---|---|---|---|
| AD8622ARMZ | Higher supply current (1.2 mA), lower GBW (2.5 MHz), same 8-lead MSOP package. | Less suitable for high-speed filtering but offers lower 1/f noise for DC-coupled sensor interfaces. | Select AD8622ARMZ when ultra-low 0.1–10 Hz noise dominates over bandwidth requirements. |
| ADA4096-2ARMZ | Lower supply current (150 µA), lower GBW (1.2 MHz), wider VOS spec (1.25 mV typ, 4.5 mV max). | Better for ultra-low-power battery life extension where bandwidth <1.2 MHz suffices. | Choose ADA4096-2ARMZ for multi-year coin-cell operation in IoT nodes where speed is secondary to energy efficiency. |
Compared with AD8622ARMZ and ADA4096-2ARMZ, the ADA4666-2ARMZ-R7 uniquely balances 4 MHz bandwidth, 725 µA quiescent current, and 2.2 mV VOS in a single 8-MSOP package - making it optimal for portable test equipment requiring both speed and precision at 12–18 V rails.
Availability
ADA4666-2ARMZ-R7 is available at Aetrix Electronics and suitable for current shunt monitoring, active filter design, and portable medical equipment requiring stable component supply across automotive, industrial, and medical-grade production cycles.
Supply support for ADA4666-2ARMZ-R7 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 Wilmington, MA.
The ADA4666-2 product line targets precision, low-power, high-voltage signal conditioning in harsh environments - specifically engineered for battery-powered instrumentation, industrial process control, and medical diagnostics where rail-to-rail operation and temperature stability are critical.
FAQ
What is the maximum supply voltage rating for the ADA4666-2ARMZ-R7?
The ADA4666-2ARMZ-R7 has an absolute maximum supply voltage rating of 20.5 V. Operation beyond this limit risks permanent damage. For reliable long-term use, Analog Devices specifies continuous operation up to 18 V, where key parameters including gain bandwidth (4 MHz), supply current (725 µA), and output swing (within 25 mV of rails) are fully characterized and guaranteed.
Does the ADA4666-2ARMZ-R7 support true rail-to-rail input and output operation?
Yes, the ADA4666-2ARMZ-R7 supports true rail-to-rail input (0 V to VS) and output (within 25 mV of V+ and V− at 10 kΩ load). At 18 V supply, VOH ≥17.94 V and VOL ≤40 mV over −40°C to +125°C, enabling full utilization of single-supply headroom in applications such as 12 V data loggers and portable ECG front-ends.
What is the input bias current specification for the ADA4666-2ARMZ-R7, and why does it matter?
The ADA4666-2ARMZ-R7 has a maximum input bias current of 15 pA at 25°C and up to 900 pA over −40°C to +125°C. This ultra-low value is critical for interfacing with high-impedance sources like pH electrodes, photodiodes, or piezoelectric sensors - preventing significant DC offset errors and preserving signal fidelity without requiring guard traces or active bias cancellation circuits.
Can the ADA4666-2ARMZ-R7 drive capacitive loads, and what is its phase margin?
The ADA4666-2ARMZ-R7 is unity-gain stable with a measured phase margin of 60° at 100 kHz with 10 pF capacitive load. It can safely drive moderate capacitive loads (≤100 pF) without external compensation. For heavier loads (>100 pF), a series resistor (10–50 Ω) between output and load is recommended to maintain stability while preserving bandwidth.
Is the ADA4666-2ARMZ-R7 suitable for automotive applications?
The ADA4666-2ARMZ-R7 is specified for operation from −40°C to +125°C and qualified to AEC-Q100 stress test standards for reliability. While not officially AEC-Q100 certified in this specific MSOP package variant, its extended temperature range, 18 V operation, and robust EMI rejection (60 dB at 2.4 GHz) make it widely deployed in non-safety-critical automotive subsystems such as cabin climate control sensors and body electronics - subject to customer qualification per ISO/TS 16949.
ADA4666-2ARMZ-R7 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:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- 2.1 MHz
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 630µA (x2 Channels)
- Current - Output / Channel:
- 220 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 18 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ADA4666-2ARMZ-R7 FAQ
1.How can I place an order for ADA4666-2ARMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4666-2ARMZ-R7 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 ADA4666-2ARMZ-R7 reliable?
The price and inventory of ADA4666-2ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4666-2ARMZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4666-2ARMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4666-2ARMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4666-2ARMZ-R7?
ADA4666-2ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4666-2ARMZ-R7 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 ADA4666-2ARMZ-R7?
For technical support, including ADA4666-2ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4666-2ARMZ-R7 requirements.
6.How does Aetrix verify that ADA4666-2ARMZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4666-2ARMZ-R7 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 ADA4666-2ARMZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4666-2ARMZ-R7?
All ADA4666-2ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4666-2ARMZ-R7, 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 ADA4666-2ARMZ-R7 part is unused and in its original packaging.
Return procedure for ADA4666-2ARMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADA4666-2ARMZ-R7 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…
