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Analog Devices Inc. AD822AR-REEL7
- Part No.:
- AD822AR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD822AR-REEL7.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,157
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Product details
Overview
AD822AR-REEL7 from Analog Devices is a dual-channel, precision, low-power FET-input operational amplifier optimized for single-supply (5 V to 30 V) and dual-supply (±2.5 V to ±15 V) operation. It delivers rail-to-rail output swing (within 10 mV of rails), 1.8 MHz unity-gain bandwidth, 3 V/µs slew rate, and 800 µV max input offset voltage - enabling high-fidelity signal conditioning in battery-powered medical instrumentation and photodiode preamplifiers.
For engineers reviewing the AD822AR-REEL7 datasheet, AD822AR-REEL7 pinout, AD822AR-REEL7 application, or AD822AR-REEL7 equivalent, key selection criteria include its true single-supply capability with input range extending below ground, 25 pA max input bias current, 350 pF capacitive load drive, and industrial-grade temperature range (−40°C to +85°C).
Technical Context
The AD822AR-REEL7 integrates two matched JFET-input amplifiers in a single SOIC_N-8 package, supporting both single- and dual-supply configurations without phase inversion. Its input stage operates with common-mode voltage down to −0.2 V (at 5 V supply) or −15.2 V (at ±15 V), while output drives ≥15 mA into resistive loads and up to 350 pF directly.
DC precision is maintained via 2 µV/°C typical offset drift, 10¹³ Ω differential input impedance, and 66–90 dB CMRR across frequency and supply conditions. AC performance includes −93 dB THD at 10 kHz (±5 V supply) and stable unity-gain operation with 1.8 MHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Single: 5 V to 30 V; Dual: ±2.5 V to ±15 V - supports wide input power architectures including Li-ion battery systems and industrial rails. |
| Input Bias Current | Max 25 pA at 25°C - enables high-impedance sensor interfacing (e.g., pH electrodes, photodiodes) without significant error. |
| Output Swing | Within 10 mV of each rail - maximizes dynamic range in low-voltage single-supply systems (e.g., 5 V data acquisition). |
| Unity-Gain Bandwidth | 1.8 MHz - sufficient for 12-bit to 14-bit ADC driver and active filter applications up to ~100 kHz. |
| Quiescent Current | 800 µA per amplifier (max) - enables multi-channel, always-on monitoring in portable instrumentation. |
| Capacitive Load Drive | 350 pF (G = +1) - eliminates need for isolation resistors when driving ADC inputs or long PCB traces. |
| Input Offset Voltage | Max 800 µV - ensures ≤0.02% gain error in precision gain stages with 10 kΩ feedback networks. |
Pinout & Package
AD822AR-REEL7 is housed in an 8-lead SOIC_N (Small Outline Integrated Circuit, narrow body) package, 3.9 mm × 4.9 mm, with standard 1.27 mm pitch. Thermal resistance θJA = 160°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Delivers rail-to-rail voltage with ≥15 mA drive capability; requires no external compensation for 350 pF loads. |
| 2 (–IN1) | Inverting input, Amp 1 | High-impedance JFET node; accepts signals below ground in single-supply mode (e.g., transducer outputs). |
| 3 (+IN1) | Non-inverting input, Amp 1 | Matches –IN1 in bias current and offset; used for unity-gain buffers or precision non-inverting amplifiers. |
| 4 (V–) | Negative supply rail | Connects to GND (single-supply) or negative rail (dual-supply); supports input common-mode down to −0.2 V relative to this pin. |
| 5 (V+) | Positive supply rail | Accepts 5–30 V (single) or +2.5 to +15 V (dual); supplies both amplifiers; decoupling recommended near pin. |
| 6 (OUT2) | Amplifier 2 output | Electrically isolated from OUT1; enables dual-path signal processing (e.g., differential receiver front-end). |
| 7 (–IN2) | Inverting input, Amp 2 | Matched to –IN1 for crosstalk < −130 dB @ 1 kHz - critical for dual-channel instrumentation rejection. |
| 8 (+IN2) | Non-inverting input, Amp 2 | Provides identical DC/AC specs as +IN1; allows independent configuration of second amplifier channel. |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Input common-mode extends 0.2 V below V–, enabling ground-referenced sensor interfaces without level-shifting circuitry. |
| Rail-to-rail output | Output swings within 10 mV of V+ and V–, preserving >99% of available voltage headroom in 3.3 V or 5 V systems. |
| Low input bias current | ≤25 pA max ensures <1 µV error across 100 MΩ source impedances - essential for piezoelectric and electrochemical sensors. |
| High capacitive load drive | Stable at 350 pF with G = +1 eliminates need for series output resistors when driving ADC sample-and-hold capacitors. |
| Industrial temperature range | Specified from −40°C to +85°C (B grade) - qualified for deployment in medical devices, field instrumentation, and industrial PLC I/O modules. |
Applications
| Battery-Powered Medical Instrumentation | Photodiode Preamp |
|---|---|
Use Scenario: Portable ECG or pulse oximeter front-end amplifying microvolt-level biopotential signals with ultra-low noise and minimal power draw. IC Role / Device Role / Timing Role: Dual-channel precision op amp configured as low-noise, high-CMRR instrumentation amplifier first stage and reference buffer. Use Value: 13 nV/√Hz input voltage noise at 10 kHz and 25 pA input bias current prevent signal degradation from electrode-skin interface impedance. |
Use Scenario: Reverse-biased photodiode current-to-voltage conversion in optical smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with FET input preserving high gain accuracy and low dark-current error. Use Value: Input bias current ≤25 pA avoids saturation from diode leakage; rail-to-rail output accommodates wide dynamic range of light intensity. |
| Active Filters | 12-bit to 14-bit Data Acquisition Systems |
Use Scenario: 4th-order anti-aliasing or reconstruction filter in portable data loggers requiring low distortion and stable phase response. IC Role / Device Role / Timing Role: Dual op amp implementing Sallen-Key or multiple-feedback topology with matched channels for symmetry. Use Value: 1.8 MHz unity-gain bandwidth and −93 dB THD support clean filtering up to 100 kHz without harmonic folding into Nyquist band. |
Use Scenario: Signal conditioning stage before SAR or sigma-delta ADCs in industrial process monitors or test equipment. IC Role / Device Role / Timing Role: Precision buffer and programmable-gain amplifier driving ADC input with minimal settling error. Use Value: 1.4 µs settling time to 0.1% and 350 pF direct drive capability eliminate external isolation components and reduce BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC2272CDR | Lower bandwidth (2.2 MHz), higher quiescent current (1.1 mA), wider offset range (±1.3 mV), SOIC-8 package. | Less suitable for low-power battery systems; acceptable for general-purpose industrial filtering where power budget >1 mA/channel. | Select when cost sensitivity outweighs precision and power requirements; verify layout compatibility with AD822AR-REEL7 pinout. |
| OPA2134PA | Higher bandwidth (8 MHz), higher supply current (4 mA), lower noise (8 nV/√Hz), DIP-8/SOIC-8 package. | Better for audio or wideband applications; overqualified for low-speed medical sensing due to excess power consumption. | Choose only if system requires >3 MHz bandwidth or sub-10 nV/√Hz noise; not recommended for energy-constrained designs. |
Compared with TLC2272CDR and OPA2134PA, AD822AR-REEL7 uniquely balances ultra-low input bias current (≤25 pA), rail-to-rail output, and sub-1 mA quiescent power - making it optimal for precision, low-power, single-supply instrumentation where sensor impedance exceeds 10 MΩ and supply headroom is constrained.
Availability
AD822AR-REEL7 is available at Aetrix Electronics and suitable for battery-powered medical instrumentation, photodiode preamplifiers, active filters, and 12-bit to 14-bit data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for AD822AR-REEL7 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, with design and manufacturing expertise spanning precision amplifiers, converters, and RF solutions.
The AD822 belongs to Analog Devices' precision FET-input op amp product line, engineered specifically for low-power, single-supply signal conditioning in high-impedance sensor interfaces and portable instrumentation systems.
FAQ
What supply voltage ranges does the AD822AR-REEL7 support?
The AD822AR-REEL7 operates from a single supply of 5 V to 30 V or dual supplies of ±2.5 V to ±15 V. At 5 V single supply, its input common-mode range extends from −0.2 V to +4 V, and output swings within 10 mV of both rails. This flexibility allows direct integration into Li-ion-powered devices and industrial 24 V systems without level-shifting circuitry. The AD822AR-REEL7 maintains full specification compliance across this entire range.
Does the AD822AR-REEL7 support rail-to-rail input operation?
No, the AD822AR-REEL7 does not support rail-to-rail input - its input common-mode voltage range extends below the negative rail (e.g., −0.2 V at 5 V supply) but stops approximately 1 V below the positive rail under full bandwidth conditions. However, it does provide true rail-to-rail output swing, delivering signals within 10 mV of V+ and V–. This asymmetry makes the AD822AR-REEL7 ideal for ground-referenced inputs with rail-limited outputs, such as sensor buffers feeding ADCs.
What is the maximum capacitive load the AD822AR-REEL7 can drive stably in unity-gain configuration?
The AD822AR-REEL7 is characterized to drive up to 350 pF capacitively in unity-gain follower configuration without oscillation or excessive overshoot. This is confirmed in the datasheet's "Capacitive Load Drive" specification (350 pF, G = +1) and validated by stability curves in Figure 16. For loads exceeding 350 pF, a small series resistor (e.g., 10–50 Ω) between the output and capacitor is recommended. The AD822AR-REEL7's internal compensation eliminates need for external compensation networks in standard applications.
How does the AD822AR-REEL7 perform in terms of input offset voltage and drift?
The AD822AR-REEL7 has a maximum initial input offset voltage of 800 µV and a typical offset voltage drift of 2 µV/°C. Over the industrial temperature range (−40°C to +85°C), maximum offset variation is 1.2 mV for B-grade units. These values enable high-accuracy DC-coupled gain stages - for example, a 100× gain amplifier using AD822AR-REEL7 introduces ≤80 µV of offset error at room temperature, rising by only ~0.2 mV across full temperature range. This performance is verified in Tables 1–3 of the Rev. J datasheet.
Is the AD822AR-REEL7 pin-compatible with other dual op amps in SOIC-8 packages?
The AD822AR-REEL7 uses the industry-standard SOIC_N-8 pinout (pin 1 = OUT1, pin 2 = –IN1, ..., pin 8 = +IN2), matching generic dual op amp layouts. However, functional pin compatibility is not guaranteed with all SOIC-8 dual op amps due to differences in internal architecture (e.g., JFET vs. bipolar input), supply range, and output stage behavior. While physical footprint matches TLC2272CDR and OPA2340UA, circuit-level validation is required before substitution. The AD822AR-REEL7's unique combination of FET input, rail-to-rail output, and single-supply optimization must be verified in target application.
AD822AR-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 1.9 MHz
- -3db Bandwidth:
- 1.9 MHz
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 1.24mA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD822AR-REEL7 FAQ
1.How can I place an order for AD822AR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD822AR-REEL7 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 AD822AR-REEL7 reliable?
The price and inventory of AD822AR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD822AR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD822AR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD822AR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD822AR-REEL7?
AD822AR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD822AR-REEL7 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 AD822AR-REEL7?
For technical support, including AD822AR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD822AR-REEL7 requirements.
6.How does Aetrix verify that AD822AR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD822AR-REEL7 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 AD822AR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD822AR-REEL7?
All AD822AR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD822AR-REEL7, 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 AD822AR-REEL7 part is unused and in its original packaging.
Return procedure for AD822AR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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