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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. AD824ARZ-14-3V

Name: AD824ARZ-14-3V
Brand: Analog Devices Inc.
SKU: AD824ARZ-14-3V
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD824ARZ-14-3V

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: AD824ARZ-14-3V.pdf

Description:: IC OPAMP JFET 4 CIRCUIT 14SOIC

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Product details

Overview

AD824ARZ-14-3V from Analog Devices is a quad, FET-input, rail-to-rail output operational amplifier optimized for 3 V single-supply operation. It delivers 2 MHz gain bandwidth, 2 V/µs slew rate, and 500 µA per amplifier supply current, with input bias current as low as 2 pA and rail-to-rail output swing within 15 mV of both rails. It is used in battery-powered medical instrumentation, photo diode preamplifiers, and low-voltage strain gage amplifiers.

For engineers reviewing the AD824ARZ-14-3V datasheet, AD824ARZ-14-3V pinout, AD824ARZ-14-3V application, or AD824ARZ-14-3V equivalent, key selection criteria include guaranteed 3 V parametric performance, FET-input high-impedance interface capability, rail-to-rail output compliance under light-to-moderate loads, and extended industrial temperature range (−40°C to +85°C) in SOIC-14 package.

Technical Context

The AD824ARZ-14-3V employs a complementary bipolar process with n-channel JFET input stage, enabling input voltage operation from −0.2 V to +1.0 V at 3 V supply and eliminating phase reversal up to the positive rail. Its unique input architecture supports safe common-mode extension beyond the negative supply while maintaining picoamp-level bias current across the full operating range.

The rail-to-rail output stage uses bipolar transistors to achieve 15 mV saturation voltage at ±20 µA load, with open-loop output impedance of 100 Ω and stable operation into capacitive loads up to 350 pF. Channel separation exceeds −123 dB at 1 kHz, supporting multistage filtering in single-supply systems without crosstalk-induced signal degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3 V single supply (fully specified); also operates from ±15 V dual supply - enables direct integration into 3.3 V or Li-ion–powered systems without level-shifting.
Input Bias Current	2 pA typical at 25°C, ≤4000 pA over −40°C to +85°C - preserves accuracy with MΩ-range sensor source impedances (e.g., photodiodes, piezoresistive bridges).
Output Swing	Rail-to-rail: VOL = 15 mV, VOH = 2.975 V at 3 V supply - maximizes dynamic range in low-voltage ADC front ends and precision sample-and-hold circuits.
Gain Bandwidth Product	2 MHz - supports stable unity-gain follower configurations and closed-loop bandwidths up to ~180 kHz at G = 10 for instrumentation amplifier applications.
Slew Rate	2 V/µs - enables accurate reproduction of 300 kHz full-power signals (2 V_p-p) and fast settling (2 µs to 0.01% for 2.3 V step) in portable data acquisition.
Input Offset Voltage	0.2 mV typical, ≤1.5 mV over temperature - ensures sub-0.1% gain error in 10× instrumentation amplifier configurations with high-impedance sources.
THD + N	0.01% at 10 kHz, 3 V supply - meets audio-grade distortion requirements for 3 V headphone driver and sensor signal conditioning stages.

Pinout & Package

AD824ARZ-14-3V is housed in a narrow 14-lead SOIC (R suffix) package, 8.65 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT A	Amplifier A output - drives external load or feedback network; rail-to-rail capable with 100 Ω effective output impedance.
2	–IN A	Inverting input of Amp A - high-impedance (10¹³ Ω), low-bias-current node for precision feedback configuration.
3	+IN A	Non-inverting input of Amp A - same FET-input characteristics as Pin 2; accepts common-mode voltages from −0.2 V to +1.0 V at 3 V supply.
4	V+	Positive supply pin - connects to 3 V rail; all four amplifiers share this supply node.
5	+IN B	Non-inverting input of Amp B - electrically isolated from other inputs; supports independent differential sensing channels.
6	–IN B	Inverting input of Amp B - matched offset and bias current to Pin 5; enables dual-channel instrumentation amplifier topologies.
7	OUT B	Amplifier B output - identical electrical specs to Pin 1; usable for second-stage gain, filtering, or reference buffering.
8	OUT D	Amplifier D output - fully independent channel; supports multi-function analog subsystems (e.g., sensor excitation + signal conditioning + reference generation).
9	–IN D	Inverting input of Amp D - low-noise, low-drift node; suitable for precision DAC output buffering where source impedance exceeds 100 kΩ.
10	+IN D	Non-inverting input of Amp D - supports true differential input configurations when paired with Pin 9 and external resistors.
11	V–	Negative supply pin - tied to ground in 3 V single-supply operation; provides return path for all four amplifiers' quiescent current.
12	+IN C	Non-inverting input of Amp C - enables third independent channel for auxiliary functions (e.g., false ground generation, power supply monitoring).
13	–IN C	Inverting input of Amp C - matched to Pin 12; allows implementation of active filters or precision comparators with hysteresis.
14	OUT C	Amplifier C output - complements Pins 12–13 for dedicated signal path; used in stereo headphone drivers (Channel 1) and bridge excitation buffers.

Key Features

Feature	Design Value
FET input stage	2 pA input bias current enables accurate amplification of signals from ultra-high-impedance sources (e.g., photodiodes, pH electrodes) without significant DC error.
Rail-to-rail output	Swings to within 15 mV of both supply rails at 3 V - preserves >99% of available signal swing for 12-bit+ ADC interfacing and low-voltage analog processing.
No phase reversal	Input voltage may extend to +V_S without inversion - eliminates latch-up risk in sensor interfaces where transient overdrive or ESD events occur.
Low 3 V supply current	500 µA per amplifier (2 mA total for quad) - extends battery life in portable medical devices and remote sensors operating on coin cells or single Li-ion cells.
Laser-trimmed offset	≤1.5 mV max V_OS over temperature - reduces calibration overhead in production test and enables untrimmed designs for cost-sensitive OEM instrumentation.
Capacitive load drive	Stable with ≤350 pF directly on output - simplifies PCB layout by eliminating need for isolation resistors in sensor signal chains with long traces or cable capacitance.

Applications

Photo Diode Preamplifier	Battery-Powered Medical Instrumentation
Use Scenario: Amplifying weak current from reverse-biased photodiodes in pulse oximeters or portable spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10⁶–10⁹ Ω feedback resistor; sets system noise floor and dynamic range. Use Value: 2 pA input bias current prevents DC error accumulation; rail-to-rail output maximizes SNR into 12-bit SAR ADCs powered from 3 V rails.	Use Scenario: Signal conditioning in handheld ECG monitors, glucose meters, or wearable biosensors. IC Role / Device Role / Timing Role: Quad-channel analog front end: one channel for sensor excitation, two for differential biopotential amplification, one for reference buffering. Use Value: Guaranteed 3 V operation and 500 µA/channel current enable >100-hour battery life; low THD (0.01%) preserves diagnostic waveform fidelity.
Low-Voltage Strain Gage Amplifier	DAC Output Amplifier
Use Scenario: Amplifying mV-level Wheatstone bridge outputs in portable load cells or structural health monitoring nodes. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core (G = 10–100) using two AD824ARZ-14-3V op amps and laser-trimmed thin-film resistors. Use Value: Input offset drift of 2 µV/°C and CMRR ≥56 dB ensure <0.1% measurement error across −20°C to +70°C ambient range.	Use Scenario: Buffering and level-shifting output of 12-bit DACs in portable data loggers or programmable power supplies. IC Role / Device Role / Timing Role: Unity-gain voltage follower driving 10 kΩ loads and 100 pF trace capacitance; maintains monotonicity and settling time. Use Value: 2 µs settling to 0.01% and rail-to-rail swing preserve DAC resolution; low 16 nV/√Hz noise avoids degrading effective number of bits (ENOB).

Photo Diode Preamplifier

Battery-Powered Medical Instrumentation

Use Scenario: Amplifying weak current from reverse-biased photodiodes in pulse oximeters or portable spectrophotometers.

IC Role / Device Role / Timing Role: Transimpedance amplifier with 10⁶–10⁹ Ω feedback resistor; sets system noise floor and dynamic range.

Use Value: 2 pA input bias current prevents DC error accumulation; rail-to-rail output maximizes SNR into 12-bit SAR ADCs powered from 3 V rails.

Use Scenario: Signal conditioning in handheld ECG monitors, glucose meters, or wearable biosensors.

IC Role / Device Role / Timing Role: Quad-channel analog front end: one channel for sensor excitation, two for differential biopotential amplification, one for reference buffering.

Use Value: Guaranteed 3 V operation and 500 µA/channel current enable >100-hour battery life; low THD (0.01%) preserves diagnostic waveform fidelity.

Low-Voltage Strain Gage Amplifier

DAC Output Amplifier

Use Scenario: Amplifying mV-level Wheatstone bridge outputs in portable load cells or structural health monitoring nodes.

IC Role / Device Role / Timing Role: Precision instrumentation amplifier core (G = 10–100) using two AD824ARZ-14-3V op amps and laser-trimmed thin-film resistors.

Use Value: Input offset drift of 2 µV/°C and CMRR ≥56 dB ensure <0.1% measurement error across −20°C to +70°C ambient range.

Use Scenario: Buffering and level-shifting output of 12-bit DACs in portable data loggers or programmable power supplies.

IC Role / Device Role / Timing Role: Unity-gain voltage follower driving 10 kΩ loads and 100 pF trace capacitance; maintains monotonicity and settling time.

Use Value: 2 µs settling to 0.01% and rail-to-rail swing preserve DAC resolution; low 16 nV/√Hz noise avoids degrading effective number of bits (ENOB).

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 (190 µA/ch), but only 1.7 MHz GBW, no guaranteed 3 V specs, and higher V_OS (10 mV max).	Acceptable for low-speed, ultra-low-power sensor interfaces where bandwidth <100 kHz suffices and calibration compensates offset.	Choose TLC27L4CDR only if total system current budget is <1 mA and bandwidth requirements are ≤50 kHz.
OPA4342UA	Higher slew rate (2.5 V/µs), lower noise (11 nV/√Hz), but 1.2 mA/ch supply current and no 3 V guaranteed performance.	Suitable for higher-fidelity audio or faster data acquisition where 3 V operation is not mandatory and thermal dissipation permits higher I_Q.	Prefer OPA4342UA when operating at ≥5 V and signal integrity demands <12 nV/√Hz noise and sub-1 µs settling.

Compared with TLC27L4CDR and OPA4342UA, AD824ARZ-14-3V uniquely guarantees full parametric performance at 3 V while balancing low bias current, rail-to-rail output, and moderate speed - making it the optimal choice for uncalibrated, battery-critical, low-voltage precision analog systems.

Availability

AD824ARZ-14-3V is available at Aetrix Electronics and suitable for battery-powered medical instrumentation, photo diode preamplifiers, and low-voltage strain gage amplifiers requiring stable component supply across extended industrial temperature ranges.

Supply support for AD824ARZ-14-3V 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 product line delivers quad FET-input op amps engineered for precision, low-power, single-supply operation in portable and remote sensing applications - emphasizing rail-to-rail output, ultra-low input bias current, and guaranteed 3 V functionality.

FAQ

What is the guaranteed minimum supply voltage for AD824ARZ-14-3V operation?

The AD824ARZ-14-3V is fully specified and guaranteed for operation at 3 V single supply. Electrical parameters including input offset voltage, supply current, and output swing are validated at VS = 3.0 V per Table 3 of the official Analog Devices datasheet Rev. E. Operation below 3 V is not characterized or recommended.

Does AD824ARZ-14-3V support rail-to-rail input common-mode range?

No - AD824ARZ-14-3V features rail-to-rail *output*, but its input common-mode range at 3 V supply is limited to 0 V to +1.0 V (i.e., −0.2 V to +V_S − 2 V). The input stage does not operate down to the negative rail; however, it safely accepts inputs up to the positive rail without phase reversal.

Can AD824ARZ-14-3V drive capacitive loads without external compensation?

Yes - AD824ARZ-14-3V is stable driving capacitive loads up to 350 pF directly on the output, as confirmed in the "Theory of Operation" section and Figure 6/Figure 8 of the datasheet. For loads exceeding 350 pF, external compensation (e.g., series resistor + feedback capacitor) is required to maintain phase margin >50°.

Is AD824ARZ-14-3V pin-compatible with other AD824 variants like AD824ARZ?

Yes - AD824ARZ-14-3V shares identical 14-lead SOIC (R) package, pinout, and footprint with AD824ARZ and AD824AR. The "-3V" suffix denotes guaranteed 3 V parametric performance; all variants use the same physical layout and electrical connections.

What is the maximum capacitive load AD824ARZ-14-3V can drive while maintaining 0.01% settling accuracy?

At 3 V supply, AD824ARZ-14-3V achieves 2 µs settling to 0.01% for a 2.3 V step into purely resistive loads. With 100 pF capacitive load (typical PCB trace + input capacitance), settling remains ≤2.5 µs. For >350 pF, settling degrades significantly due to added pole; stability must be verified per application conditions.

AD824ARZ-14-3V Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

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-14-3V FAQ

1.How can I place an order for AD824ARZ-14-3V through Aetrix?

Please submit a Request for Quotation (RFQ) for AD824ARZ-14-3V 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-14-3V reliable?

The price and inventory of AD824ARZ-14-3V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD824ARZ-14-3V is usually 5 days.

3.What payment methods are accepted for AD824ARZ-14-3V?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD824ARZ-14-3V transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD824ARZ-14-3V?

AD824ARZ-14-3V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD824ARZ-14-3V 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-14-3V?

For technical support, including AD824ARZ-14-3V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD824ARZ-14-3V requirements.

6.How does Aetrix verify that AD824ARZ-14-3V is sourced from the original manufacturer or authorized distributors?

All AD824ARZ-14-3V 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-14-3V meets industry standards.

7.What is the process for return or replacement of AD824ARZ-14-3V?

All AD824ARZ-14-3V units undergo pre-shipment inspection (PSI). If there is an issue with AD824ARZ-14-3V, 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-14-3V part is unused and in its original packaging.

Return procedure for AD824ARZ-14-3V:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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