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Analog Devices Inc. AD8624ACPZ-R2
- Part No.:
- AD8624ACPZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WQFN Exposed Pad, CSP
- Datasheet:
-
AD8624ACPZ-R2.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,302
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Product details
Overview
AD8624ACPZ-R2 from Analog Devices is a quad precision rail-to-rail output operational amplifier optimized for low-power, high-accuracy signal conditioning. It delivers 125 μV max offset voltage, 215 μA/amp typical supply current, and 11 nV/√Hz voltage noise density across −40°C to +125°C, enabling use in portable medical instrumentation and laser diode control loops.
For engineers reviewing the AD8624ACPZ-R2 datasheet, AD8624ACPZ-R2 pinout, AD8624ACPZ-R2 application, or AD8624ACPZ-R2 equivalent, this page provides verified specifications, package mapping to 16-lead LFCSP_WQ, thermal resistance (θJA = 55°C/W), rail-to-rail output swing at ±2.5 V to ±15 V, and confirmed alternative options for micropower precision op amp selection.
Technical Context
The AD8624ACPZ-R2 integrates input bias current cancellation circuitry to maintain ≤200 pA max IB over temperature, critical for high-impedance sensor interfaces. Its 1.2 μV/°C max offset drift and 0.5 μV/°C typical drift ensure stable DC performance in thermocouple amplifiers and strain gage circuits.
Designed for unity-gain stability with 540 kHz gain bandwidth product and 74° phase margin (±2.5 V), it supports precision closed-loop configurations without external compensation. The 1 GΩ differential input resistance and 1 TΩ common-mode input resistance minimize loading on high-Z sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 125 μV max - ensures ≤0.5 mV error in 4 V full-scale 16-bit ADC front-end at room temperature |
| Supply Current per Amp | 215 μA typical - enables four-channel operation at <1 mA total, suitable for battery-powered devices |
| Voltage Noise Density | 11 nV/√Hz - preserves SNR in low-level sensor signals below 100 mV |
| Input Bias Current | 200 pA max - avoids >2 mV error across 10 MΩ source impedance at 25°C |
| CMRR | 120 dB min - rejects >99.999% of common-mode interference in differential measurements |
| Output Swing | Rail-to-rail - delivers full ±2.45 V output at ±2.5 V supply, maximizing dynamic range |
| Operating Temp Range | −40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
Pinout & Package
AD8624ACPZ-R2 is housed in a 16-lead LFCSP_WQ (CP-16-17) package with 4 mm × 4 mm body, 0.65 mm pitch, and exposed pad connected to V– for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN D | Inverting input of fourth amplifier - requires matched trace length to +IN D for optimal CMRR |
| 2 | +IN D | Non-inverting input of fourth amplifier - high-impedance node sensitive to PCB leakage |
| 3 | V– | Negative supply rail - must connect exposed pad to this pin for thermal dissipation |
| 4 | +IN C | Non-inverting input of third amplifier - referenced to same ground as V– for rail-to-rail output |
| 5 | −IN A | Inverting input of first amplifier - shares layout constraints with other inverting inputs |
| 6 | +IN A | Non-inverting input of first amplifier - primary sensor interface point in instrumentation designs |
| 7 | +IN B | Non-inverting input of second amplifier - used in dual-channel signal paths like bridge sensors |
| 8 | OUT B | Output of second amplifier - drives loads up to 10 kΩ while maintaining rail-to-rail swing |
| 9 | −IN B | Inverting input of second amplifier - paired with +IN B in differential configurations |
| 10 | OUT C | Output of third amplifier - supports unity-gain buffer or gain-of-100 configurations |
| 11 | −IN C | Inverting input of third amplifier - matches input capacitance (5.5 pF) of all channels |
| 12 | NC | No connect - left floating per datasheet; not bonded internally |
| 13 | NC | No connect - left floating per datasheet; not bonded internally |
| 14 | OUT D | Output of fourth amplifier - completes quad channel set for multi-sensor systems |
| 15 | OUT A | Output of first amplifier - most commonly used channel in reference designs |
| 16 | NC | No connect - left floating per datasheet; not bonded internally |
Key Features
| Feature | Design Value |
|---|---|
| Low offset drift | 0.5 μV/°C typical - reduces calibration frequency in field-deployed equipment |
| Rail-to-rail output | 2.45 V high / −2.45 V low at ±2.5 V supply - maximizes usable ADC input range |
| Input bias cancellation | ≤200 pA max IB - enables accurate amplification of picoamp-level photodiode currents |
| High open-loop gain | 135 dB typical - ensures <0.001% gain error in precision gain stages |
| No phase reversal | Guaranteed within supply rails - prevents system lockup during transient overvoltage events |
Applications
| Portable Precision Instrumentation | Laser Diode Control Loops |
|---|---|
Use Scenario: Handheld gas analyzers requiring sub-ppm detection accuracy with battery life >24 hours. IC Role / Device Role / Timing Role: Front-end amplifier for electrochemical sensor output, digitized by 24-bit ΣΔ ADC. Use Value: 215 μA/amp supply current and 125 μV offset enable 16-bit effective resolution without active cooling or recalibration. | Use Scenario: Closed-loop current control for fiber-coupled pump lasers in telecom transceivers. IC Role / Device Role / Timing Role: Error amplifier comparing photodiode feedback to reference in analog PID loop. Use Value: 11 nV/√Hz noise and 0.5 μV/°C drift maintain <±0.1% optical power stability over temperature. |
| Strain Gage Amplifiers | Medical Instrumentation |
Use Scenario: Wireless structural health monitoring nodes measuring microstrain on bridges or aircraft frames. IC Role / Device Role / Timing Role: Instrumentation amplifier core using matched resistor network for Wheatstone bridge output. Use Value: 120 dB CMRR and 1 GΩ input resistance reject common-mode noise from long sensor cables. | Use Scenario: Portable ECG monitors capturing microvolt-level cardiac signals with 5-day battery life. IC Role / Device Role / Timing Role: First-stage gain and filtering for dry-electrode biopotential acquisition. Use Value: 200 pA max input bias current prevents electrode polarization errors in high-impedance electrode interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4692-4ARUZ | Higher 350 μA/amp supply current; 12 nV/√Hz noise; same 16-TSSOP package | Better PSRR (130 dB) but lower CMRR (110 dB); less suitable for high-common-mode bridge sensors | Select when supply rejection dominates over common-mode rejection in noisy industrial settings |
| OP4177ARZ | Lower 12 μV max offset; higher 1.2 mA/amp supply current; SOIC-14 package | Wider ±18 V supply range; no rail-to-rail output - limits dynamic range at low supplies | Select when ultra-low offset is mandatory and power budget allows >4× higher current draw |
Compared with ADA4692-4ARUZ and OP4177ARZ, AD8624ACPZ-R2 uniquely balances micropower operation (215 μA/amp), rail-to-rail output, and 120 dB CMRR in a thermally efficient LFCSP package - making it optimal for space-constrained, battery-operated precision systems where both accuracy and efficiency are non-negotiable.
Availability
AD8624ACPZ-R2 is available at Aetrix Electronics and suitable for portable medical instrumentation, laser diode control loops, strain gage amplifiers, and thermocouple amplifiers requiring stable component supply across extended temperature ranges.
Supply support for AD8624ACPZ-R2 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision measurement and control.
The AD862x family was designed specifically for micropower, high-accuracy signal conditioning in portable and harsh-environment instrumentation - emphasizing low offset, low drift, rail-to-rail output, and robust operation from −40°C to +125°C.
FAQ
What is the maximum supply voltage for AD8624ACPZ-R2?
The AD8624ACPZ-R2 has an absolute maximum supply voltage rating of ±18 V. It operates reliably across ±2.5 V to ±15 V, with specified performance including 215 μA/amp supply current and 125 μV max offset voltage within that range. Exceeding ±18 V risks permanent damage per the Absolute Maximum Ratings table.
Does AD8624ACPZ-R2 support rail-to-rail input operation?
No, AD8624ACPZ-R2 features rail-to-rail *output* swing only. Its input voltage range is specified as −1.3 V to +1.3 V with ±2.5 V supplies and −13.8 V to +13.8 V with ±15 V supplies - meaning inputs must remain within 1.3 V of each rail. Input common-mode range does not extend to the supply rails.
How is the exposed pad on the AD8624ACPZ-R2 LFCSP package used?
The exposed pad on the AD8624ACPZ-R2 must be soldered to the PCB and electrically connected to the V– pin (Pin 3) for optimal thermal performance and electrical stability. This connection reduces θJA to 55°C/W and minimizes output offset shift due to thermal gradients across the die.
Can AD8624ACPZ-R2 drive capacitive loads without instability?
AD8624ACPZ-R2 is unity-gain stable but exhibits increasing overshoot with capacitive loads >100 pF. At 100 pF and ±2.5 V supply, small-signal overshoot is <5%. For loads >200 pF, external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to maintain phase margin above 60°.
Is AD8624ACPZ-R2 pin-compatible with other quad op amps in LFCSP packages?
No, AD8624ACPZ-R2 uses a proprietary 16-lead LFCSP_WQ (CP-16-17) pinout distinct from industry-standard quad op amp LFCSP footprints. Its pin assignments - including NC pins at 12, 13, and 16, and V– on Pin 3 with exposed pad tie - require dedicated PCB layout and are not interchangeable with alternatives like ADA4692-4 or OP4177.
AD8624ACPZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.48V/µs
- Gain Bandwidth Product:
- 560 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 215µA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-WQ (4x4)
AD8624ACPZ-R2 FAQ
1.How can I place an order for AD8624ACPZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8624ACPZ-R2 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 AD8624ACPZ-R2 reliable?
The price and inventory of AD8624ACPZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8624ACPZ-R2 is usually 5 days.
3.What payment methods are accepted for AD8624ACPZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8624ACPZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8624ACPZ-R2?
AD8624ACPZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8624ACPZ-R2 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 AD8624ACPZ-R2?
For technical support, including AD8624ACPZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8624ACPZ-R2 requirements.
6.How does Aetrix verify that AD8624ACPZ-R2 is sourced from the original manufacturer or authorized distributors?
All AD8624ACPZ-R2 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 AD8624ACPZ-R2 meets industry standards.
7.What is the process for return or replacement of AD8624ACPZ-R2?
All AD8624ACPZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD8624ACPZ-R2, 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 AD8624ACPZ-R2 part is unused and in its original packaging.
Return procedure for AD8624ACPZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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