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Analog Devices Inc. AD8655WARMZ-RL
- Part No.:
- AD8655WARMZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8655WARMZ-RL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,499
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Product details
Overview
AD8655WARMZ-RL from Analog Devices is a single-channel, low-noise, precision CMOS operational amplifier qualified for automotive applications. It delivers 2.7 nV/√Hz input voltage noise at 10 kHz, 250 µV max offset voltage over common-mode range, and rail-to-rail input/output swing across 2.7 V to 5.5 V supply. It serves as an ADC buffer in high-resolution automotive sensor signal conditioning systems operating from −40°C to +125°C.
For engineers reviewing the AD8655WARMZ-RL datasheet, AD8655WARMZ-RL pinout, AD8655WARMZ-RL application, or AD8655WARMZ-RL equivalent, key selection criteria include its automotive qualification, sub-pA input bias current (1 pA typ), 28 MHz gain bandwidth, 0.4 µV/°C offset drift, and MSOP-8 package compatibility with space-constrained engine control and ADAS front-end designs.
Technical Context
The AD8655WARMZ-RL is a voltage-feedback op amp using Analog Devices' DigiTrim® post-package trimming to achieve high DC accuracy without sacrificing AC performance. Its true rail-to-rail input stage enables full dynamic range utilization in single-supply systems, while unity-gain stability supports direct buffering of SAR and delta-sigma ADCs.
It features 110 dB open-loop gain (typ), 69° phase margin at 0 pF load, and robust input overvoltage protection (±0.3 V beyond rails). The device maintains 2.7 nV/√Hz noise and 0.0007% THD+N up to 1 kHz - critical for preserving SNR in precision analog front-ends for collision avoidance radar receivers and battery management monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.7 nV/√Hz @ 10 kHz - enables ≥110 dB SNR in 20-bit ADC buffer stages with 100 kHz bandwidth |
| Offset Voltage | 250 µV max over VCM - ensures ≤0.0025% gain error in 10 V full-scale industrial sensor interfaces |
| Gain Bandwidth | 28 MHz - supports stable closed-loop operation up to 10× gain with >2 MHz small-signal bandwidth |
| Supply Range | 2.7 V to 5.5 V - compatible with automotive 3.3 V and 5 V domains without level-shifting |
| Operating Temp | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and ADAS ECU placement |
| Input Bias Current | 1 pA typ - permits use of >10 MΩ sensor interface resistors without significant offset shift |
| CMRR | 100 dB min - rejects >99.99% of common-mode interference in noisy vehicle power environments |
Pinout & Package
AD8655WARMZ-RL is housed in an 8-lead MSOP (RM-8) package, 3.0 mm × 3.0 mm × 0.85 mm, Pb-free and RoHS compliant. Thermal resistance θJA = 210°C/W (JEDEC standard board).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected; must be left floating or tied to ground per layout best practice |
| 2 | Inverting Input (–IN) | Differential input node; accepts signals from 0 V to V+ with rail-to-rail common-mode range |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched to –IN for <10 pA input offset current and low CMRR degradation |
| 4 | Negative Supply (V–) | Ground or negative rail connection; supports single-supply (V– = GND) or dual-supply operation |
| 5 | No Connect (NC) | Internally unconnected; no electrical function; avoid routing signals nearby to prevent coupling |
| 6 | Output (OUT) | Capable of ±220 mA drive into 10 kΩ load; swings within 30 mV of rails at 1 mA load |
| 7 | Positive Supply (V+) | Accepts 2.7 V to 5.5 V; requires local 0.1 µF ceramic bypass capacitor placed <2 mm from pin |
| 8 | No Connect (NC) | Internally unconnected; electrically isolated; recommended to tie to V– for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale signal capture in 3.3 V microcontroller-based systems without supply headroom loss |
| DigiTrim® technology | Post-package offset trimming achieves 250 µV max VOS across temperature - eliminates system calibration |
| Automotive qualification | AEC-Q100 Grade 1 certified; validated for 15-year lifetime in engine bay and ADAS module environments |
| Low THD+N | 0.0007% at 1 kHz - preserves audio fidelity in cabin microphone preamps and reduces harmonic distortion in PLL filters |
| High PSRR | 105 dB min - suppresses ripple from switched regulators powering ADAS camera modules and radar SoCs |
Applications
| Automotive Collision Avoidance Radar | High-Resolution Battery Cell Monitoring |
|---|---|
Use Scenario: Amplifying low-amplitude IF signals from 77 GHz radar transceivers before digitization by 16-bit ADCs. IC Role / Device Role / Timing Role: Precision baseband buffer with ultra-low noise and high CMRR to preserve SNR in presence of switching power supply noise. Use Value: 2.7 nV/√Hz noise floor and 100 dB CMRR maintain >80 dB effective number of bits (ENOB) at 100 kHz bandwidth. |
Use Scenario: Conditioning voltage outputs from precision shunt-based current sensors in 12S Li-ion battery packs. IC Role / Device Role / Timing Role: High-accuracy, low-drift gain stage feeding isolated sigma-delta modulators in BMS ASICs. Use Value: 0.4 µV/°C drift and 250 µV max VOS ensure <±1 mV total error over −40°C to +85°C cell temperature range. |
| Industrial Process Control Transmitter | Audio Signal Chain in In-Vehicle Infotainment |
Use Scenario: Buffering 4–20 mA loop transmitter outputs for HART communication and analog output stages. IC Role / Device Role / Timing Role: Rail-to-rail I/O amplifier enabling 0–5 V output compliance with 3.3 V MCU DACs and reference buffers. Use Value: 2.7 V minimum supply and rail-swing capability allow direct interfacing with low-voltage industrial controllers without boost circuitry. |
Use Scenario: Microphone preamplifier in multi-mic array for voice recognition and active noise cancellation. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain block driving ADC inputs with 110 dB SNR target. Use Value: 0.0007% THD+N and 2.7 nV/√Hz noise meet automotive-grade audio performance requirements per ISO 11452-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4625-1ARZ | Higher 2.9 nV/√Hz noise, 10 MHz GBW, SOIC-8 only; no automotive qualification | Targeted at lab instrumentation, not automotive-qualified systems | Select ADA4625-1ARZ only for non-automotive test equipment where wider supply range (±5 V to ±15 V) is required |
| OPA333AIDBVR | Lower 0.1 µV/°C drift but higher 6.5 nV/√Hz noise; 350 kHz GBW; SOT-23-5 package | Better for ultra-low-drift DC sensing, unsuitable for >100 kHz signal conditioning | Choose OPA333AIDBVR when offset drift dominates design budget and bandwidth <500 kHz suffices |
Compared with ADA4625-1ARZ and OPA333AIDBVR, AD8655WARMZ-RL uniquely balances automotive qualification, 28 MHz bandwidth, and 2.7 nV/√Hz noise - making it the only option for high-SNR, high-speed, AEC-Q100-compliant signal chains in ADAS and powertrain ECUs.
Availability
AD8655WARMZ-RL is available at Aetrix Electronics and suitable for automotive ADAS subsystems, battery management systems, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8655WARMZ-RL 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 AD8655/AD8656 family was engineered specifically for automotive-qualified, low-noise precision amplification - targeting signal integrity-critical roles in radar, battery monitoring, and safety-critical sensor interfaces.
FAQ
What is the maximum capacitive load the AD8655WARMZ-RL can drive without external compensation?
The AD8655WARMZ-RL can drive up to 200 pF capacitive loads stably without external compensation. For loads exceeding 200 pF - especially above 100 kHz - ringing occurs; a snubber network (e.g., 200 Ω + 500 pF) is recommended to reduce overshoot by >30% and eliminate oscillation. This applies directly to AD8655WARMZ-RL in automotive camera focus control loops where long PCB traces add parasitic capacitance.
Is AD8655WARMZ-RL pin-compatible with other members of the AD8655/AD8656 family?
Yes, AD8655WARMZ-RL shares identical pinout with AD8655ARMZ and AD8655ARZ variants - all use standard 8-pin op amp configuration (NC, –IN, +IN, V–, NC, OUT, V+, NC) in both MSOP-8 and SOIC-8 packages. This allows drop-in replacement between AD8655WARMZ-RL and AD8655ARMZ in existing layouts, provided thermal and automotive qualification requirements align.
Does AD8655WARMZ-RL support dual-supply operation?
Yes, AD8655WARMZ-RL operates from ±1.35 V to ±2.5 V (i.e., total supply 2.7 V to 5.0 V), enabling true dual-supply use down to ±1.35 V. Its rail-to-rail input/output architecture functions across the full supply range - critical for bipolar signal conditioning in automotive sensor interfaces like crankshaft position sensors with AC-coupled outputs.
How does the DigiTrim® technology in AD8655WARMZ-RL improve system-level calibration?
DigiTrim® performs post-package laser trimming of offset voltage, correcting mechanical stress-induced errors from packaging. This yields 250 µV max VOS over temperature - eliminating need for factory or field calibration in AD8655WARMZ-RL-based systems such as automotive oxygen sensor signal conditioners, reducing BOM cost and test time.
What is the typical supply current of AD8655WARMZ-RL at 125°C?
The typical supply current of AD8655WARMZ-RL is 4.5 mA at 25°C and rises to 5.3 mA maximum at +125°C (per Table 1). This predictable thermal behavior allows accurate power budgeting in thermally constrained ADAS domain controllers, where AD8655WARMZ-RL's 5.3 mA max draw supports continuous operation within 100 mW thermal envelopes.
AD8655WARMZ-RL 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:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 11V/µs
- Gain Bandwidth Product:
- 28 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 3.7mA
- Current - Output / Channel:
- 220 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8655WARMZ-RL FAQ
1.How can I place an order for AD8655WARMZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8655WARMZ-RL 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 AD8655WARMZ-RL reliable?
The price and inventory of AD8655WARMZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8655WARMZ-RL is usually 5 days.
3.What payment methods are accepted for AD8655WARMZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8655WARMZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8655WARMZ-RL?
AD8655WARMZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8655WARMZ-RL 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 AD8655WARMZ-RL?
For technical support, including AD8655WARMZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8655WARMZ-RL requirements.
6.How does Aetrix verify that AD8655WARMZ-RL is sourced from the original manufacturer or authorized distributors?
All AD8655WARMZ-RL 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 AD8655WARMZ-RL meets industry standards.
7.What is the process for return or replacement of AD8655WARMZ-RL?
All AD8655WARMZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8655WARMZ-RL, 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 AD8655WARMZ-RL part is unused and in its original packaging.
Return procedure for AD8655WARMZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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