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Analog Devices Inc. AD8624ARUZ
- Part No.:
- AD8624ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8624ARUZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
AD8624ARUZ 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 AD8624ARUZ datasheet, AD8624ARUZ pinout, AD8624ARUZ application, or AD8624ARUZ 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 AD8624ARUZ employs input bias current cancellation circuitry to maintain ≤200 pA max input bias current across −40°C to +125°C, enabling stable performance in high-impedance sensor interfaces. Its rail-to-rail output swing supports full dynamic range utilization with ±2.5 V supplies, while unity-gain stability and 540 kHz gain bandwidth product allow direct use in transimpedance and instrumentation amplifier topologies without external compensation.
Internally, the device features matched PNP input transistors with integrated bias cancellation, achieving 0.5 μV/°C typical offset drift and 120 dB min CMRR at DC. The 14-lead TSSOP package includes an exposed pad recommended for connection to V–, supporting thermal dissipation up to θJA = 112°C/W per datasheet Table 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV typical / 125 μV max - enables sub-100 μV system-level error budgets in strain gage amplifiers. |
| Supply Current per Amplifier | 215 μA typical at ±2.5 V - allows four-channel precision amplification within 860 μA total quiescent budget. |
| Input Bias Current | ≤200 pA max over temperature - preserves signal integrity in >1 GΩ source impedance applications like thermocouple buffers. |
| Voltage Noise Density | 11 nV/√Hz at 1 kHz - supports low-noise amplification of microvolt-level signals without dominant op-amp contribution. |
| Gain Bandwidth Product | 540 kHz at ±2.5 V - sufficient for closed-loop gains up to 54 with 10 kHz signal bandwidth in sensor front-ends. |
| Common-Mode Rejection Ratio | 110 dB min at DC - rejects power supply ripple and shared-mode interference in single-supply derived rails. |
| Operating Temperature Range | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and downhole instrumentation environments. |
Pinout & Package
The AD8624ARUZ is housed in a 14-lead TSSOP (RU-14) package with exposed thermal pad connected to V–. Pin 1 is marked by a dot; the exposed pad must be soldered to a V– plane for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail swing supports full-scale ADC input drive without level-shifting. |
| 2 | –IN A | Inverting input of Amp A - high-impedance node requiring guard traces in µV-level applications. |
| 3 | +IN A | Non-inverting input of Amp A - matched to –IN A for common-mode rejection; sensitive to layout asymmetry. |
| 4 | V– | Negative supply rail - also connects to exposed thermal pad; must be low-impedance for noise immunity. |
| 5 | +IN D | Non-inverting input of Amp D - electrically isolated from other inputs; shares same die substrate. |
| 6 | –IN D | Inverting input of Amp D - pin 6 and pin 5 form differential pair for fourth channel. |
| 7 | OUT D | Amplifier D output - identical AC/DC specs to OUT A; usable as independent buffer or in-amp reference stage. |
| 8 | NC | No connect - not internally bonded; must remain unconnected per datasheet Note 1. |
| 9 | +IN C | Non-inverting input of Amp C - positioned adjacent to V+ for minimized trace length in PCB routing. |
| 10 | –IN C | Inverting input of Amp C - paired with pin 9; critical for matched resistor networks in instrumentation amps. |
| 11 | OUT C | Amplifier C output - supports simultaneous multi-channel signal conditioning with <1 mV inter-channel crosstalk. |
| 12 | V+ | Positive supply rail - decoupling capacitor required within 1 cm for stability at full GBW. |
| 13 | –IN B | Inverting input of Amp B - shares same input stage architecture as pins 2 and 6; matched offset tracking. |
| 14 | +IN B | Non-inverting input of Amp B - pin 14 and pin 13 are mirror-symmetric to pins 2 and 3 on die layout. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers ≥2.40 V output high and ≤−2.40 V output low into 10 kΩ load at ±2.5 V supply - maximizes ADC dynamic range utilization. |
| Low input offset voltage drift | 0.5 μV/°C typical - reduces calibration frequency in field-deployed equipment operating across wide ambient ranges. |
| Input bias current cancellation | Maintains ≤400 pA max IB over −40°C to +125°C - eliminates thermal drift-induced errors in high-Z pH or ion-selective electrodes. |
| Unity-gain stable | Operates without external compensation in gain-of-1 configurations - simplifies PCB layout and reduces BOM count in buffer stages. |
| Extended temperature qualification | Specified from −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for automotive cabin and engine bay modules. |
Applications
| Portable Precision Instrumentation | Laser Diode Control Loops |
|---|---|
|
Use Scenario: Battery-powered handheld multimeters measuring µV-level thermocouple outputs with 0.1°C resolution. IC Role / Device Role / Timing Role: Front-end amplifier providing 100× gain, rail-to-rail output drive to SAR ADC, and 125 μV max offset error contribution. Use Value: Enables 4½-digit accuracy on 3.7 V Li-ion supply while consuming only 860 μA total for all four channels. |
Use Scenario: Closed-loop current regulation for fiber-coupled 808 nm pump lasers in portable medical devices. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photodiode feedback current to voltage, then driving laser diode current source. Use Value: 215 μA/amp supply current allows continuous monitoring without compromising battery life; low noise prevents optical power jitter. |
| Strain Gage Amplifiers | Medical Instrumentation |
|
Use Scenario: Wheatstone bridge readout in wireless structural health monitoring nodes deployed on bridges and wind turbine blades. IC Role / Device Role / Timing Role: Instrumentation amplifier core using two AD8624ARUZ channels for differential gain and reference buffering. Use Value: 200 pA max input bias current prevents bridge imbalance errors; 11 nV/√Hz noise ensures <1 με resolution at 10 Hz bandwidth. |
Use Scenario: ECG front-end signal conditioning in wearable Holter monitors requiring FDA Class II compliance. IC Role / Device Role / Timing Role: Three-channel amplifier: one for lead-I differential, one for right-leg drive, one for respiration sensing. Use Value: −40°C to +125°C rating supports sterilization cycles; low 0.2 μV p-p 0.1–10 Hz noise meets IEC 60601-2-27 noise floor requirements. |
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; 25 μV max offset; 12 nV/√Hz noise; same 14-lead TSSOP package. | Better offset spec but higher power - suitable when ultra-low offset dominates over battery life. | Select ADA4692-4ARUZ if offset <25 μV is mandatory and supply current >300 μA is acceptable. |
| OP4177ARUZ | Lower 10 μV max offset; 1.8 mA/amp supply current; 8 nV/√Hz noise; 14-lead SOIC package (not pin-compatible). | Superior dc precision and noise at cost of 8× higher supply current and larger footprint. | Choose OP4177ARUZ only for lab-grade bench instruments where power is unconstrained and offset <10 μV is critical. |
Compared with ADA4692-4ARUZ and OP4177ARUZ, the AD8624ARUZ uniquely balances sub-125 μV offset, 215 μA/amp consumption, and 14-lead TSSOP compatibility - making it the optimal choice for space-constrained, battery-operated precision systems requiring guaranteed performance across automotive and industrial temperature extremes.
Availability
AD8624ARUZ is available at Aetrix Electronics and suitable for portable instrumentation, laser diode control, and medical sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8624ARUZ 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 AD8624ARUZ belongs to Analog Devices' precision micropower op amp product line, engineered specifically for battery-powered instrumentation, sensor interfaces, and industrial control systems demanding low offset, low noise, and robust operation from −40°C to +125°C.
FAQ
What is the maximum supply voltage for the AD8624ARUZ?
The AD8624ARUZ has an absolute maximum supply voltage rating of ±18 V, but its specified operating range is ±2.5 V to ±15 V. Operation at ±18 V is not guaranteed and may compromise reliability or parametric performance. For designs targeting ±15 V operation, the AD8624ARUZ maintains 540 kHz gain bandwidth and 110 dB CMRR minimum, as confirmed in Table 3 of the Rev. D datasheet.
Does the AD8624ARUZ require external compensation for unity-gain stability?
No, the AD8624ARUZ is internally compensated for unity-gain stability across its full operating temperature and supply range. This is explicitly stated in the General Description section and verified in Figure 19 (open-loop gain/phase plots), which shows ≥74° phase margin at 1 kHz with AV = 1. No external capacitors or resistors are needed for stable gain-of-1 operation.
How is the exposed thermal pad on the AD8624ARUZ 14-lead TSSOP package intended to be connected?
The exposed pad on the AD8624ARUZ must be connected to the V– supply rail, as noted in datasheet Figure 3 and the "Notes" section below the pin diagram. This connection provides both thermal conduction (reducing θJA from 112°C/W to lower effective values) and electrical stability by minimizing ground bounce in high-speed switching environments.
Can the AD8624ARUZ be used in single-supply configurations?
Yes, the AD8624ARUZ supports single-supply operation with rail-to-rail output swing and input common-mode range extending to within 1.3 V of each rail at ±2.5 V supplies (i.e., −1.3 V to +1.3 V). When operated from +5 V and GND, the input range becomes 0 V to +3.7 V and output swings from 10 mV to 4.99 V into 100 kΩ, enabling use in 3.3 V or 5 V microcontroller-based systems.
What is the typical input bias current cancellation performance of the AD8624ARUZ over temperature?
The AD8624ARUZ achieves ≤400 pA maximum input bias current across −40°C to +125°C, enabled by its internal bias cancellation circuitry. At +25°C and ±2.5 V supply, typical IB is 30 pA (Table 2), rising to 400 pA at temperature extremes - a key differentiator versus non-canceled precision op amps that exceed 1 nA at +125°C.
AD8624ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 14-TSSOP
AD8624ARUZ FAQ
1.How can I place an order for AD8624ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8624ARUZ 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 AD8624ARUZ reliable?
The price and inventory of AD8624ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8624ARUZ is usually 5 days.
3.What payment methods are accepted for AD8624ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8624ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8624ARUZ?
AD8624ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8624ARUZ 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 AD8624ARUZ?
For technical support, including AD8624ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8624ARUZ requirements.
6.How does Aetrix verify that AD8624ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8624ARUZ 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 AD8624ARUZ meets industry standards.
7.What is the process for return or replacement of AD8624ARUZ?
All AD8624ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8624ARUZ, 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 AD8624ARUZ part is unused and in its original packaging.
Return procedure for AD8624ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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