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Analog Devices Inc. AD8506ARMZ-R7
- Part No.:
- AD8506ARMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8506ARMZ-R7.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:680
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Product details
Overview
AD8506ARMZ-R7 from Analog Devices is a dual, rail-to-rail input/output, zero-crossover distortion CMOS operational amplifier optimized for ultra-low-power battery-operated sensor signal conditioning. It delivers 20 μA maximum supply current per amplifier, 2.5 mV max offset voltage, 45 nV/√Hz voltage noise density at 1 kHz, and operates from 1.8 V to 5 V single supply - enabling precision analog front-ends in smoke detectors and portable bio-sensors.
For engineers reviewing the AD8506ARMZ-R7 datasheet, AD8506ARMZ-R7 pinout, AD8506ARMZ-R7 application, or AD8506ARMZ-R7 equivalent, this page provides verified technical context, package-specific pin definitions, real-world use-value analysis, and two validated alternative op amps with documented functional trade-offs for low-voltage, micro-power sensing systems.
Technical Context
The AD8506ARMZ-R7 employs an on-chip charge pump to power its input differential pair, eliminating crossover distortion across the full 0 V to VSY common-mode range - unlike conventional dual-pair rail-to-rail input op amps. This architecture enables stable CMRR ≥ 85 dB and PSRR ≥ 100 dB over −40°C to +125°C while maintaining 1 pA typical input bias current.
It features unity-gain stability with 95 kHz gain-bandwidth product, 13 mV/μs slew rate, and 60° phase margin into 1 MΩ//20 pF loads. Its rail-to-rail output swings within 2 mV of rails at 100 kΩ load, supporting high-accuracy signal acquisition near supply limits in energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 20 μA per amplifier max - enables >10-year battery life in coin-cell-powered sensors |
| Input Offset Voltage | 2.5 mV max at 25°C - supports <1% error in 0–2.5 V sensor output ranges without trimming |
| Voltage Noise Density | 45 nV/√Hz at 1 kHz - preserves SNR in low-frequency bio-signal amplification (e.g., ECG, pulse oximetry) |
| CMRR / PSRR | ≥100 dB min - rejects supply ripple and common-mode interference in unregulated battery systems |
| Operating Supply | 1.8 V to 5 V single supply - compatible with Li-ion, alkaline, and coin-cell discharge profiles |
| Temperature Range | −40°C to +125°C - qualified for industrial and automotive under-hood sensor modules |
| Gain-Bandwidth | 95 kHz - sufficient for anti-aliasing and DC-coupled sensor conditioning up to ~10 kHz |
Pinout & Package
AD8506ARMZ-R7 is housed in an 8-lead MSOP (RM-8) package with exposed pad for thermal performance. Pin 1 is marked by a dot; pin numbering follows standard MSOP convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives downstream ADC input or filter stage with rail-to-rail swing |
| 2 | –IN A | Inverting input of Amp A - connects to feedback network or transducer return path |
| 3 | +IN A | Non-inverting input of Amp A - accepts high-impedance sensor signals (e.g., thermistor, pH electrode) |
| 4 | V– | Negative supply terminal - tied to GND in single-supply configurations |
| 5 | +IN B | Non-inverting input of Amp B - enables dual-channel signal conditioning on one die |
| 6 | –IN B | Inverting input of Amp B - supports differential or reference-based measurement topologies |
| 7 | OUT B | Amplifier B output - independent channel for auxiliary sensor or calibration path |
| 8 | V+ | Positive supply terminal - accepts 1.8–5 V unregulated battery voltage directly |
Key Features
| Feature | Design Value |
|---|---|
| Zero input crossover distortion | Eliminates signal-dependent offset shifts across full input common-mode range (0 V to VSY) |
| On-chip charge pump | Generates internal boosted voltage to bias input stage - no external components required |
| Rail-to-rail I/O | Supports full-scale signal acquisition from GND to VSY without headroom loss |
| Ultra-low input bias current | 1 pA typical - prevents loading errors in high-impedance sensor interfaces (>100 MΩ) |
| High PSRR/CMRR | 100 dB minimum - maintains accuracy despite battery voltage decay and PCB noise coupling |
Applications
| Smoke Detector Signal Conditioning | Pulse Oximeter Front-End |
|---|---|
Use Scenario: Amplifying weak current output from ionization chamber or photoelectric smoke sensor under varying battery voltage (2.0–3.6 V). IC Role / Device Role / Timing Role: Dual-channel transimpedance and reference buffer amplifier with rail-to-rail output swing. Use Value: 20 μA supply current extends AA battery life beyond 5 years; 100 dB PSRR prevents false alarms caused by supply droop during alarm siren activation. |
Use Scenario: Conditioning red/IR photodiode current signals in wearable pulse oximeters powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-noise, low-drift transimpedance amplifier with matched dual channels for synchronous LED drive and detection. Use Value: 45 nV/√Hz noise density preserves SpO₂ calculation accuracy; zero-crossover distortion ensures linear response across full photodiode dynamic range. |
| Portable Gas Sensor Interface | Industrial Temperature Transmitter |
Use Scenario: Amplifying low-level mV outputs from electrochemical gas sensors (CO, NO₂) in handheld air quality monitors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and offset correction. Use Value: 2.5 mV max offset voltage minimizes calibration burden; 1 pA input bias avoids drift in high-resistance sensor elements. |
Use Scenario: Signal conditioning for 4–20 mA loop-powered RTD or thermocouple transmitters operating in −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Rail-to-rail input buffer and cold-junction compensation amplifier in isolated analog front-end. Use Value: −40°C to +125°C qualification ensures reliability in enclosure-mounted transmitters; 105 dB typical CMRR rejects ground-loop interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4505-2ARZ-R7 | Same zero-crossover architecture; 15 μA supply current; 1.5 mV max offset; 100 kHz GBW | Better offset and lower current, but higher cost and limited availability in MSOP | Preferred when tighter offset spec (<1.5 mV) and sub-15 μA current are critical for multi-year battery life |
| LPV821IDGKR | No charge pump; uses conventional rail-to-rail input; 650 nA supply current; 1.25 mV max offset | Lower power but exhibits measurable crossover distortion above 100 Hz; not specified to +125°C | Acceptable for cost-sensitive consumer devices where full temperature range and distortion-free linearity are non-critical |
Compared with ADA4505-2ARZ-R7, AD8506ARMZ-R7 trades 5 μA higher supply current for broader MSOP availability and proven field reliability in safety-critical smoke detectors; versus LPV821IDGKR, it delivers guaranteed zero-crossover performance and extended temperature qualification essential for industrial and medical designs.
Availability
AD8506ARMZ-R7 is available at Aetrix Electronics and suitable for smoke detector manufacturing, portable medical device development, industrial temperature transmitter design, and battery-powered environmental sensor integration requiring stable component supply across long production lifecycles.
Supply support for AD8506ARMZ-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 Norwood, MA, with design centers worldwide.
The AD8506ARMZ-R7 belongs to Analog Devices' zero-crossover distortion op amp family, engineered specifically for precision, ultra-low-power signal conditioning in battery-operated safety and health monitoring systems.
FAQ
What is the maximum supply voltage for AD8506ARMZ-R7?
The absolute maximum supply voltage for AD8506ARMZ-R7 is 5.5 V. The device is fully specified for operation from 1.8 V to 5 V single supply, with electrical characteristics guaranteed across that range. Exceeding 5.5 V risks permanent damage per the Absolute Maximum Ratings table in the AD8505/AD8506/AD8508 Rev. F datasheet. AD8506ARMZ-R7 must be operated within these limits to ensure reliability and parametric compliance.
Does AD8506ARMZ-R7 require external components for its charge pump operation?
No, AD8506ARMZ-R7 integrates a fully self-contained charge pump circuit that requires no external capacitors or resistors. The charge pump generates the internal boosted voltage needed to eliminate input crossover distortion, enabling rail-to-rail input operation without user intervention. This is confirmed in the Theory of Operation section (Page 14) of the AD8505/AD8506/AD8508 Rev. F datasheet.
Is AD8506ARMZ-R7 qualified for automotive applications?
AD8506ARMZ-R7 is specified for the extended industrial temperature range of −40°C to +125°C and meets JEDEC JESD22-A108 reliability standards. While not AEC-Q200 qualified, its temperature rating and robustness make it suitable for under-dash or engine-compartment-adjacent sensor modules where full automotive qualification is not mandated. Always verify system-level compliance requirements before deployment.
What is the typical input bias current of AD8506ARMZ-R7 at 25°C?
The typical input bias current of AD8506ARMZ-R7 is 1 pA at 25°C, as stated in Table 1 (Electrical Characteristics-1.8 V Operation) of the AD8505/AD8506/AD8508 Rev. F datasheet. This ultra-low value remains ≤100 pA across the −40°C to +85°C range, making AD8506ARMZ-R7 ideal for interfacing with high-impedance sources like pH electrodes and piezoresistive pressure sensors.
Can AD8506ARMZ-R7 drive a 10 kΩ load rail-to-rail?
Yes, AD8506ARMZ-R7 can drive a 10 kΩ load rail-to-rail: at 1.8 V supply, VOH ≥ 1.65 V and VOL ≤ 25 mV (Table 1); at 5 V supply, VOH ≥ 4.9 V and VOL ≤ 30 mV (Table 2). These values confirm output swing within 100 mV of both rails under 10 kΩ load, satisfying true rail-to-rail performance for precision analog signal chains using AD8506ARMZ-R7.
AD8506ARMZ-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:
- 0.013V/µs
- Gain Bandwidth Product:
- 95 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 15µA (x2 Channels)
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8506ARMZ-R7 FAQ
1.How can I place an order for AD8506ARMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8506ARMZ-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 AD8506ARMZ-R7 reliable?
The price and inventory of AD8506ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8506ARMZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8506ARMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8506ARMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8506ARMZ-R7?
AD8506ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8506ARMZ-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 AD8506ARMZ-R7?
For technical support, including AD8506ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8506ARMZ-R7 requirements.
6.How does Aetrix verify that AD8506ARMZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8506ARMZ-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 AD8506ARMZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8506ARMZ-R7?
All AD8506ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8506ARMZ-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 AD8506ARMZ-R7 part is unused and in its original packaging.
Return procedure for AD8506ARMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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