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Analog Devices Inc. AD824ARZ-14-REEL
- Part No.:
- AD824ARZ-14-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD824ARZ-14-REEL.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,935
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Product details
Overview
AD824ARZ-14-REEL from Analog Devices is a quad, FET-input, rail-to-rail output operational amplifier optimized for single-supply operation from 3 V to 30 V. It delivers 2 MHz gain bandwidth, 2 V/µs slew rate, and ultra-low 2 pA input bias current-enabling high-accuracy signal conditioning in battery-powered medical instrumentation and photo diode preamplifiers.
For engineers reviewing the AD824ARZ-14-REEL datasheet, AD824ARZ-14-REEL pinout, AD824ARZ-14-REEL application, or AD824ARZ-14-REEL equivalent, key selection criteria include guaranteed rail-to-rail output swing (within 15 mV of rails), low 500 µA per-amplifier supply current, and extended industrial temperature range (−40°C to +85°C) in a narrow 14-lead SOIC package.
Technical Context
The AD824ARZ-14-REEL integrates four independent JFET-input amplifiers on a complementary bipolar process, enabling input common-mode voltage extension to within 0.2 V of the negative rail and up to 1 V below the positive rail without phase reversal. Its unique input stage maintains picoamp-level bias current across this full range.
The rail-to-rail output stage achieves <15 mV saturation voltage at ±2.5 mA load and supports stable operation with capacitive loads up to 350 pF. Channel separation exceeds −123 dB at 1 kHz, ensuring minimal crosstalk in multistage filter or instrumentation amplifier configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V single supply; supports 3 V portable systems and ±15 V dual supply operation without derating. |
| Input Bias Current | 2 pA typical at 25°C; enables use with >1 GΩ source impedances without significant DC error. |
| Rail-to-Rail Output Swing | Within 15 mV of both rails at 2.5 mA load; preserves dynamic range in low-voltage signal chains. |
| Gain Bandwidth Product | 2 MHz; supports stable unity-gain follower and closed-loop gains up to 100 with adequate phase margin. |
| Slew Rate | 2 V/µs; sufficient for settling 4 V step in ≤2.5 µs to 0.01% at 3 V supply. |
| Input Offset Voltage | 1.0 mV max (AD824A grade); laser-trimmed for precision DC-coupled transducer amplification. |
| Operating Temperature | −40°C to +85°C extended industrial range; qualified for medical and remote sensor environments. |
Pinout & Package
Narrow 14-lead SOIC (R suffix), RoHS-compliant, moisture sensitivity level 3. Package dimensions per Analog Devices outline drawing 00875-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; drives external load or feedback network with rail-to-rail capability. |
| 2 | –IN A | Inverting input for Amplifier A; high-impedance node sensitive to PCB leakage and guarding. |
| 3 | +IN A | Noninverting input for Amplifier A; accepts common-mode voltages from −0.2 V to +2.9 V at 3 V supply. |
| 4 | V+ | Positive power supply pin; must be decoupled locally with 0.1 µF ceramic capacitor. |
| 5 | +IN B | Noninverting input for Amplifier B; electrically isolated from other inputs to minimize crosstalk. |
| 6 | –IN B | Inverting input for Amplifier B; shares no internal nodes with Amplifier A inputs. |
| 7 | OUT B | Amplifier B output; independently buffered and capable of driving 2.5 mA sink/source. |
| 8 | OUT D | Amplifier D output; identical performance to OUT A/B/C; pin 8 is not ground or thermal pad. |
| 9 | –IN D | Inverting input for Amplifier D; supports differential configurations with matched layout. |
| 10 | +IN D | Noninverting input for Amplifier D; referenced to same V– as all other amplifiers. |
| 11 | V– | Negative power supply pin; connects to ground in single-supply systems; requires local decoupling. |
| 12 | +IN C | Noninverting input for Amplifier C; positioned adjacent to V– for optimal noise immunity. |
| 13 | –IN C | Inverting input for Amplifier C; layout symmetry recommended versus +IN C for CMRR optimization. |
| 14 | OUT C | Amplifier C output; fully specified for rail-to-rail swing and 2.5 mA load capability. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Input voltage may exceed +VS by up to 200 mV without output polarity inversion-critical for sensor overvoltage tolerance. |
| FET input stage | 10¹³ Ω || 3.3 pF input impedance enables direct interfacing with high-Z sources like photodiodes and strain gauges. |
| Rail-to-rail output | Output swings to within 15 mV of V+ and V–, maximizing signal headroom in 3 V systems where every millivolt counts. |
| Low power per channel | 500 µA supply current per amplifier allows four-channel operation at <2.1 mA total-ideal for coin-cell powered devices. |
| Capacitive load drive | Stable with up to 350 pF directly on output; eliminates need for isolation resistors in ADC driver or filter applications. |
Applications
| Photo Diode Preamplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current signals from reverse-biased photodiodes in pulse oximeters or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier with FET input minimizing dark current error and enabling >1 GΩ feedback resistors. Use Value: 2 pA input bias current ensures <2 mV offset error with 1 MΩ feedback resistor, preserving SNR in sub-nA photocurrent detection. |
Use Scenario: Signal conditioning in handheld ECG monitors or portable gas analyzers operating from 3 V coin cells. IC Role / Device Role / Timing Role: Quad-channel analog front-end providing simultaneous gain, filtering, and reference buffering. Use Value: 500 µA per amplifier enables four-channel operation under 2.1 mA, extending battery life beyond 100 hours at 3 V. |
| Medical Transducer Interface | Low-Voltage Strain Gauge Amplifier |
Use Scenario: Conditioning outputs from piezoelectric ultrasound transducers or MEMS pressure sensors in point-of-care diagnostics. IC Role / Device Role / Timing Role: High-input-impedance buffer and programmable-gain instrumentation amplifier stage. Use Value: 10¹³ Ω input impedance prevents loading of high-Z transducers; rail-to-rail output maintains >95% dynamic range at 3 V supply. |
Use Scenario: Amplifying Wheatstone bridge outputs from load cells or torque sensors in industrial handheld tools. IC Role / Device Role / Timing Role: Precision differential amplifier with matched input pairs and low THD for ratiometric measurements. Use Value: 1.0 mV max offset voltage and 2 µV/°C drift ensure <0.1% full-scale error over −40°C to +85°C without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad FET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L4CDR | Lower supply current (125 µA/amplifier) but only 890 kHz GBW and no rail-to-rail output (1.5 V headroom). | Preferred for ultra-low-power sensor nodes where bandwidth <1 MHz suffices and rail-to-rail swing is not required. | Select when total quiescent current must be <500 µA for all four channels and output swing to within 1.5 V of rails is acceptable. |
| OPA4342UA | Higher slew rate (10 V/µs) and lower noise (11 nV/√Hz), but 1.2 mA/amplifier supply current and narrower common-mode range. | Better suited for audio line drivers or higher-speed data acquisition where noise and speed outweigh power constraints. | Choose when system requires <1 µs settling time and THD+N <0.001%, and 4.8 mA total supply current is permissible. |
Compared with TLC27L4CDR and OPA4342UA, the AD824ARZ-14-REEL uniquely balances rail-to-rail output, 2 pA input bias, and 500 µA/channel supply current-making it the only option among the three qualified for precision, low-power, single-supply medical transducer interfaces across the full −40°C to +85°C range.
Availability
AD824ARZ-14-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, medical transducer interfaces, and low-voltage strain gauge amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD824ARZ-14-REEL 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 AD824 belongs to Analog Devices' precision operational amplifier product line, designed specifically for low-power, single-supply signal conditioning in medical, industrial, and remote sensing applications where FET input integrity and rail-to-rail output fidelity are critical.
FAQ
What is the maximum capacitive load the AD824ARZ-14-REEL can drive without oscillation?
The AD824ARZ-14-REEL is specified to remain stable with capacitive loads up to 350 pF when configured as a unity-gain follower. This value is confirmed in the datasheet's "Output Characteristics" section and validated across temperature and supply voltage ranges. For loads exceeding 350 pF, external compensation (e.g., series output resistor + small capacitor) is required. The AD824ARZ-14-REEL's ability to drive such loads directly simplifies ADC driver and filter designs without added components.
Does the AD824ARZ-14-REEL support true rail-to-rail input operation?
No-the AD824ARZ-14-REEL features rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode range extends to within 0.2 V of V– and up to 1 V below V+ at 3 V supply (0 V to 2 V). At ±15 V supply, input range is −15 V to +13 V. This limitation is due to its JFET input stage architecture, which avoids phase reversal but does not achieve full rail-to-rail input voltage coverage. The AD824ARZ-14-REEL remains compatible with most single-supply sensor interfaces where the signal stays within this validated range.
Can the AD824ARZ-14-REEL operate from a 3 V supply while maintaining full specifications?
Yes-the AD824ARZ-14-REEL is fully specified and guaranteed at 3 V single supply, including offset voltage (≤1.5 mV), supply current (500–600 µA per amplifier), and rail-to-rail output swing (within 15 mV of rails at 2.5 mA). Table 3 in the datasheet explicitly documents all electrical characteristics at VS = 3.0 V, confirming its suitability for coin-cell and Li-ion battery-powered systems where low-voltage operation is mandatory. The AD824ARZ-14-REEL delivers identical performance at 3 V as at higher supplies for key parameters like bandwidth and slew rate.
What is the thermal resistance (θJA) of the AD824ARZ-14-REEL package?
The AD824ARZ-14-REEL uses a narrow 14-lead SOIC (R suffix) package with a junction-to-ambient thermal resistance (θJA) of 120°C/W, as documented in Table 5 of the datasheet. This value assumes worst-case PCB mounting conditions (minimal copper pour). With proper thermal design-including 1-in² 2-oz copper pad connected to V– and V+ pins-the effective θJA can be reduced by ~30%. The AD824ARZ-14-REEL's low 2.1 mA total quiescent current minimizes self-heating, keeping junction temperature rise under 2.5°C at ambient 85°C.
Is the AD824ARZ-14-REEL pin-compatible with other quad op amps in SOIC-14 packages?
No-the AD824ARZ-14-REEL has a proprietary pinout optimized for low crosstalk and layout symmetry, differing from industry-standard quad op amp arrangements (e.g., LM324, TL084). Pin 1 is OUT A-not +IN A-and V– is on pin 11, not pin 4. This configuration isolates power pins from sensitive inputs and separates outputs to minimize inter-channel coupling. Substituting the AD824ARZ-14-REEL into an existing LM324-based layout would require PCB revision. Always verify pin mapping using Figure 1 in the AD824 datasheet before board design.
AD824ARZ-14-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- 2 MHz
- Current - Input Bias:
- 4 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 560µA (x4 Channels)
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
AD824ARZ-14-REEL FAQ
1.How can I place an order for AD824ARZ-14-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD824ARZ-14-REEL 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 AD824ARZ-14-REEL reliable?
The price and inventory of AD824ARZ-14-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD824ARZ-14-REEL is usually 5 days.
3.What payment methods are accepted for AD824ARZ-14-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD824ARZ-14-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD824ARZ-14-REEL?
AD824ARZ-14-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD824ARZ-14-REEL 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 AD824ARZ-14-REEL?
For technical support, including AD824ARZ-14-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD824ARZ-14-REEL requirements.
6.How does Aetrix verify that AD824ARZ-14-REEL is sourced from the original manufacturer or authorized distributors?
All AD824ARZ-14-REEL 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 AD824ARZ-14-REEL meets industry standards.
7.What is the process for return or replacement of AD824ARZ-14-REEL?
All AD824ARZ-14-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD824ARZ-14-REEL, 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 AD824ARZ-14-REEL part is unused and in its original packaging.
Return procedure for AD824ARZ-14-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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