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Analog Devices Inc. AD8624ACPZ-R7
- Part No.:
- AD8624ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WQFN Exposed Pad, CSP
- Datasheet:
-
AD8624ACPZ-R7.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,772
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Product details
Overview
AD8624ACPZ-R7 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, 11 nV/√Hz voltage noise density, ±2.5 V to ±15 V dual-supply operation, and −40°C to +125°C extended industrial temperature range - enabling use in portable medical sensors and laser diode control loops.
For engineers reviewing the AD8624ACPZ-R7 datasheet, AD8624ACPZ-R7 pinout, AD8624ACPZ-R7 application, or AD8624ACPZ-R7 equivalent, this page provides verified technical context, package-specific pin definitions, real-world application mappings, and validated alternative options for precision analog design under tight power and accuracy constraints.
Technical Context
The AD8624ACPZ-R7 integrates input bias current cancellation circuitry to maintain ≤200 pA max input bias current across −40°C to +125°C, critical for high-impedance sensor interfaces. Its rail-to-rail output swing supports full dynamic range utilization with ±2.5 V minimum supply, while unity-gain stability enables direct use in gain-of-1 configurations without external compensation.
Designed for micropower instrumentation, it achieves 0.2 μV p-p (0.1 Hz–10 Hz) low-frequency noise and 540 kHz gain bandwidth product at ±2.5 V, balancing speed and precision for DC-coupled measurement front-ends where thermal drift and long-term offset stability are paramount.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 125 μV maximum - ensures ≤0.5 mV error in 4 V full-scale 16-bit systems without trimming |
| Supply Current per Amplifier | 215 μA typical at ±2.5 V - enables four-channel operation below 1 mA total quiescent current |
| Input Bias Current | 200 pA maximum - supports >10 GΩ source impedances without significant DC error |
| Voltage Noise Density | 11 nV/√Hz at 1 kHz - preserves SNR in low-level thermocouple or strain gage amplification |
| Operating Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Rail-to-Rail Output Swing | Within 50 mV of rails at 10 kΩ load - maximizes usable output voltage range in single-supply or low-voltage dual-supply systems |
| Gain Bandwidth Product | 540 kHz at ±2.5 V - sufficient for anti-aliasing filters and closed-loop sensor signal conditioning up to ~50 kHz |
Pinout & Package
AD8624ACPZ-R7 is housed in a 16-lead LFCSP_WQ (4 mm × 4 mm body, CP-16-17), featuring an exposed thermal pad recommended to be connected to V– for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN D | Inverting input of amplifier D - high-impedance node requiring guarded layout for <100 pA leakage paths |
| 2 | +IN D | Non-inverting input of amplifier D - matched to −IN D for CMRR >107 dB over temperature |
| 3 | V– | Negative supply rail - connects to exposed pad; serves as primary thermal and reference return path |
| 4 | +IN C | Non-inverting input of amplifier C - electrically isolated from other inputs to prevent crosstalk-induced errors |
| 5 | −IN A | Inverting input of amplifier A - shares same input stage topology as all channels for consistent bias behavior |
| 6 | +IN A | Non-inverting input of amplifier A - referenced to V– and V+ for rail-to-rail common-mode range (±1.3 V at ±2.5 V) |
| 7 | V+ | Positive supply rail - supplies all four amplifiers; decoupling capacitor required within 2 mm |
| 8 | +IN B | Non-inverting input of amplifier B - layout symmetry with +IN A minimizes thermal gradient-induced offset drift |
| 9 | −IN B | Inverting input of amplifier B - matched pair with +IN B enables differential sensing with <0.5 μV/°C drift |
| 10 | OUT B | Output of amplifier B - capable of sourcing/sinking ±30 mA, supporting direct drive of 10 kΩ loads to rails |
| 11 | OUT C | Output of amplifier C - low 1.5 Ω closed-loop output impedance at 1 kHz maintains gain accuracy into capacitive loads |
| 12 | −IN C | Inverting input of amplifier C - internal 5.5 pF differential capacitance sets bandwidth limit in high-Z feedback networks |
| 13 | NC | No connect - must remain unconnected; not internally bonded |
| 14 | OUT D | Output of amplifier D - rail-to-rail swing allows direct interface to SAR ADC references without level-shifting |
| 15 | OUT A | Output of amplifier A - specified for 74° phase margin with 20 pF load, ensuring stable unity-gain buffer operation |
| 16 | NC | No connect - must remain unconnected; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Very low offset voltage drift | 1.2 μV/°C max - reduces calibration frequency in field-deployed instrumentation over wide ambient ranges |
| Low input offset voltage | 125 μV max - eliminates need for manual nulling in 12-bit precision applications |
| Rail-to-rail output swing | Within 50 mV of rails at 10 kΩ - enables full-scale utilization of 3.3 V or ±2.5 V ADCs without external level shifters |
| Ultra-low input bias current | 200 pA max - preserves signal integrity in pH electrode, photodiode, and piezoelectric sensor interfaces |
| Unity-gain stable | No external compensation required - simplifies PCB layout and reduces BOM count in gain-of-1 sensor buffers |
| Extended temperature rating | −40°C to +125°C operation - meets AEC-Q100 Grade 1 requirements for automotive subsystems |
Applications
| Portable Precision Instrumentation | Laser Diode Control Loops |
|---|---|
Use Scenario: Battery-powered handheld multimeters and portable gas analyzers requiring sub-microvolt DC stability over 8-hour field operation. IC Role / Device Role / Timing Role: Front-end transimpedance and difference amplifier for 24-bit ΣΔ ADCs, rejecting common-mode noise from switched-capacitor sampling. Use Value: 215 μA/amp supply current enables four-channel analog front-end operation on coin-cell batteries for >1 year; 0.2 μV p-p 0.1–10 Hz noise ensures <0.001% reading uncertainty. |
Use Scenario: Closed-loop current regulation for telecom pump lasers operating at 100 mA with <100 ppm stability over temperature. IC Role / Device Role / Timing Role: Precision I-to-V converter and error amplifier in feedback path of laser driver IC, monitoring monitor photodiode current. Use Value: 125 μV max offset limits laser power drift to <0.5% over life; rail-to-rail output drives driver enable pin directly without level-shifting components. |
| Strain Gage Amplifiers | Medical Instrumentation |
Use Scenario: Wheatstone bridge readout in structural health monitoring systems deployed on bridges and aircraft wings. IC Role / Device Role / Timing Role: Instrumentation amplifier core using two AD8624ACPZ-R7 channels per bridge leg, configured for 100× gain with matched external resistors. Use Value: 1.2 μV/°C drift prevents thermal zero-shift errors exceeding 10 με over −40°C to +85°C; 11 nV/√Hz noise supports resolution of <0.1 με strain increments. |
Use Scenario: ECG front-end amplification in wearable cardiac monitors requiring FDA Class II compliance and 2-week battery life. IC Role / Device Role / Timing Role: Three-channel signal conditioner: first stage for lead-off detection, second for right-leg drive, third for filtered biopotential amplification. Use Value: Four independent amplifiers in one LFCSP reduce board area by 40% vs discrete SOIC solutions; 200 pA input bias avoids electrode polarization artifacts in dry-electrode designs. |
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; 200 μV max offset; 12 nV/√Hz noise | Better PSRR (130 dB) but lower CMRR (105 dB); rated only to +105°C | Preferred when higher supply headroom (>±5 V) and improved power supply rejection are prioritized over ultra-low bias current |
| OP4177ARUZ | Lower 12 μV max offset; 1.2 mA/amp supply current; 8 nV/√Hz noise; ±15 V min supply | Requires ≥±12 V operation; not rail-to-rail output; −40°C to +125°C rated | Selected when ultimate DC precision outweighs power budget constraints and rail-to-rail output is unnecessary |
Compared with ADA4692-4ARUZ and OP4177ARUZ, the AD8624ACPZ-R7 uniquely balances micropower operation (215 μA/amp), rail-to-rail output, and sub-μV/°C drift in a single 4-mm² package - making it optimal for space-constrained, battery-operated precision systems demanding both low noise and wide common-mode range.
Availability
AD8624ACPZ-R7 is available at Aetrix Electronics and suitable for portable instrumentation, laser diode control, and medical sensor applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AD8624ACPZ-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.
The AD862x family was designed specifically for micropower, high-precision signal conditioning in battery-operated and thermally constrained systems - emphasizing ultra-low offset drift, rail-to-rail output, and robust operation from −40°C to +125°C.
FAQ
What is the maximum supply voltage for AD8624ACPZ-R7?
The AD8624ACPZ-R7 has an absolute maximum supply voltage rating of ±18 V. It operates reliably across ±2.5 V to ±15 V, with electrical specifications guaranteed at ±2.5 V and ±15 V per the datasheet. Exceeding ±18 V risks permanent damage to the internal ESD protection structures and input stage transistors.
Does AD8624ACPZ-R7 support rail-to-rail input operation?
No, the AD8624ACPZ-R7 features rail-to-rail *output* swing but not rail-to-rail input. Its input common-mode voltage range is limited to −1.3 V to +1.3 V with ±2.5 V supplies and −13.8 V to +13.8 V with ±15 V supplies - staying 1.2 V inside each rail. Input signals beyond these ranges risk phase reversal or increased bias current.
How is the exposed thermal pad on AD8624ACPZ-R7 intended to be connected?
The exposed pad on the AD8624ACPZ-R7 LFCSP package must be soldered to a PCB copper pour connected to the V– (negative supply) net. This connection provides primary thermal dissipation and reduces thermal resistance (θJC = 14°C/W) while minimizing ground loop noise coupling into sensitive analog nodes.
Can AD8624ACPZ-R7 drive capacitive loads without oscillation?
Yes - the AD8624ACPZ-R7 is unity-gain stable and characterized for 74° phase margin with 20 pF load at ±2.5 V. For loads >100 pF, a small series resistor (10–50 Ω) between output and capacitance is recommended to maintain stability, as shown in Figure 30 of the datasheet.
Is AD8624ACPZ-R7 pin-compatible with other quad op amps in LFCSP packages?
No - the AD8624ACPZ-R7 uses a proprietary 16-lead LFCSP pinout (CP-16-17) with NC pins at positions 13 and 16 and V– tied to the exposed pad. It is not pin-compatible with industry-standard 14-lead TSSOP (AD8624ARUZ) or 16-lead SOIC packages; PCB layout must be specific to the CP-16-17 footprint.
AD8624ACPZ-R7 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-R7 FAQ
1.How can I place an order for AD8624ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8624ACPZ-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 AD8624ACPZ-R7 reliable?
The price and inventory of AD8624ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8624ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8624ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8624ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8624ACPZ-R7?
AD8624ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8624ACPZ-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 AD8624ACPZ-R7?
For technical support, including AD8624ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8624ACPZ-R7 requirements.
6.How does Aetrix verify that AD8624ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8624ACPZ-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 AD8624ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8624ACPZ-R7?
All AD8624ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8624ACPZ-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 AD8624ACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8624ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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