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Analog Devices Inc. AD825ARZ-16
- Part No.:
- AD825ARZ-16
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD825ARZ-16.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
AD825ARZ-16 from Analog Devices is a high-speed, JFET-input operational amplifier in a 16-lead SOIC_W package, delivering 44 MHz −3 dB bandwidth, 125 V/µs slew rate, and 12 nV/√Hz input voltage noise at ±15 V supply. It features rail-to-rail input capability without phase reversal, drives ≥50 mA output current, and supports ±5 V to ±15 V dual supplies - ideal for precision ADC input buffering in data acquisition systems.
For engineers reviewing the AD825ARZ-16 datasheet, AD825ARZ-16 pinout, AD825ARZ-16 application, or AD825ARZ-16 equivalent, key selection criteria include its 16-pin SOIC_W footprint, ultralow 20 pA input bias current, stable gain under capacitive loading, and verified performance in photo detector interfaces and low-distortion filter stages.
Technical Context
The AD825ARZ-16 implements a common-drain/common-base FET input stage followed by a cascoded NPN gain stage and Class AB emitter-follower output buffer with internal compensation capacitor (CF) for capacitive load stability. Its architecture ensures no phase reversal even when inputs exceed supply rails.
It maintains stable ac performance across temperature: unity-gain bandwidth varies only ±2 MHz from −40°C to +85°C, and slew rate remains ≥115 V/µs at ±5 V supply. The 6 pF input capacitance and 5×10¹¹ Ω input resistance enable high-impedance sensor interfacing without significant loading error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 44 MHz at ±15 V, G = +1 - enables accurate signal reproduction up to video frequencies. |
| Slew Rate | 125 V/µs at ±15 V, RL = 1 kΩ - supports fast transient response in pulse amplification. |
| Input Bias Current | 20 pA typical at ±15 V - minimizes offset drift in high-impedance transducer interfaces. |
| Input Voltage Noise | 12 nV/√Hz at 10 kHz - preserves SNR in low-level analog signal conditioning. |
| Output Current | 50 mA minimum - drives 150 Ω video loads or multiple downstream inputs directly. |
| Supply Range | ±5 V to ±15 V - allows flexible system-level power domain integration. |
| Input Common-Mode Range | ±13.5 V at ±15 V supply - supports rail-to-rail input signals without clipping or inversion. |
Pinout & Package
AD825ARZ-16 is housed in a 16-lead plastic SOIC_W (RW-16) package per JEDEC MS-013-AA, 10.5 mm × 7.6 mm body size, 1.27 mm lead pitch, and 2.65 mm height. Pin 1 is top-left corner, marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 7, 8, 9, 10, 11, 15 | No Connect (NC) | Internally unconnected; must remain floating - no external connection permitted. |
| 4 | Inverting Input (–INPUT) | Differential input node; 6 pF capacitance affects high-frequency filter design. |
| 5 | Noninverting Input (+INPUT) | Differential input node; same 6 pF capacitance as Pin 4; enables rail-to-rail operation. |
| 6 | Negative Supply (–VS) | Connects to negative rail; requires local 0.01 µF ceramic + 10 µF bulk bypassing. |
| 12 | Output (OUTPUT) | Class AB emitter-follower output; drives unlimited capacitance via internal CF compensation. |
| 13 | Positive Supply (+VS) | Connects to positive rail; same bypassing requirement as Pin 6. |
| 14, 16 | No Connect (NC) | Internally unconnected; must remain floating - no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on rail-to-rail input | Guaranteed operation with inputs beyond ±15 V rails - eliminates output inversion in multiplexer-buffer applications. |
| Drives unlimited capacitive load | Internal CF compensation maintains stability with >400 pF loads - removes need for external isolation resistors. |
| Ultralow input bias current | 20 pA typical at ±15 V - reduces voltage error in high-Z photodiode or piezoelectric sensor interfaces. |
| Low distortion at 1 MHz | −77 dB THD at ±15 V - meets fidelity requirements in audio and video signal paths. |
| Stable gain vs. load variation | Open-loop gain changes <0.5 dB from RL = 150 Ω to 1 kΩ - simplifies gain-setting resistor selection. |
Applications
| CCD Signal Conditioning | ADC Input Buffering |
|---|---|
|
Use Scenario: Amplifying low-current, high-impedance output from CCD image sensors prior to sampling. IC Role / Device Role / Timing Role: High-impedance voltage buffer with rail-to-rail input and low noise to preserve charge-transfer fidelity. Use Value: 12 nV/√Hz input voltage noise and 20 pA input bias current minimize SNR degradation and dark-current-induced offset. |
Use Scenario: Driving SAR or sigma-delta ADC inputs requiring fast settling and low distortion. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating source impedance from ADC sample-and-hold capacitance. Use Value: 80 ns settling time to 0.1% and 44 MHz bandwidth ensure full-scale step accuracy within ADC conversion windows. |
| Photo Detector Interface | Low-Distortion Active Filter |
|
Use Scenario: Converting current from photodiodes or phototransistors into stable voltage with minimal offset drift. IC Role / Device Role / Timing Role: Transimpedance amplifier front-end with high input resistance and low input capacitance. Use Value: 5×10¹¹ Ω input resistance and 6 pF input capacitance enable stable TIA designs up to 1 MHz without peaking. |
Use Scenario: Implementing second-order Butterworth low-pass filters with cutoff at 1 MHz for anti-aliasing. IC Role / Device Role / Timing Role: Active filter core with low bias current enabling large R values and small C values. Use Value: 20 pA input bias current prevents DC offset accumulation across high-value filter resistors (e.g., 10 kΩ). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed JFET op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA656U | Higher 500 MHz GBW but 2× higher quiescent current (12.5 mA); 7 nV/√Hz noise; only 8-lead SOIC. | Better for RF/IF gain stages; less suitable for low-power, multi-channel DAQ where supply current matters. | Select OPA656U only if bandwidth >200 MHz is required and power budget permits. |
| ADA4817-1ARZ | Faster 1 GHz GBW, lower 4.3 nV/√Hz noise, but bipolar input (2.5 µA bias current); 8-lead SOIC only. | Superior for low-noise, high-bandwidth voltage amplification; unsuitable for high-Z sensor buffering. | Choose ADA4817-1ARZ for voltage gain stages with low source impedance; avoid for photodiode or MUX buffering. |
Compared with OPA656U and ADA4817-1ARZ, AD825ARZ-16 uniquely balances JFET-input impedance (20 pA bias), moderate bandwidth (44 MHz), low distortion (−77 dB), and 16-lead SOIC_W layout flexibility - making it optimal for space-constrained, multi-channel data acquisition where input stage fidelity and capacitive drive matter more than raw speed.
Availability
AD825ARZ-16 is available at Aetrix Electronics and suitable for data acquisition systems, medical instrumentation, and industrial process control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD825ARZ-16 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 AD825 product line delivers cost-optimized, high-speed JFET op-amps targeting precision signal conditioning in data acquisition, test equipment, and sensor interface applications - emphasizing dc accuracy, ac stability, and robust input stage behavior.
FAQ
What is the operating temperature range for AD825ARZ-16?
The AD825ARZ-16 is specified for continuous operation from −40°C to +85°C ambient temperature. This range is validated across all electrical parameters in the Rev. G datasheet, including input offset voltage drift (10 µV/°C), slew rate, and open-loop gain. Operation outside this range may result in parametric shift or reliability risk and is not guaranteed.
Does AD825ARZ-16 support single-supply operation?
The AD825ARZ-16 is characterized and guaranteed for dual-supply operation only (±5 V to ±15 V). Its input common-mode range extends to ±13.5 V at ±15 V, but it lacks rail-to-rail output swing or input stage optimization for single-supply use. For true single-supply applications, consider the AD823 or ADA4000-1 instead.
Can AD825ARZ-16 drive a 150 Ω video load at 1 VPP?
Yes - the AD825ARZ-16 delivers ≥50 mA output current and achieves ±3.1 V output swing into 150 Ω at ±5 V supply, supporting 1 VPP video signals with headroom. Its −76 dB THD at 1 MHz and 1.2% differential gain error meet NTSC video specifications when configured as a gain-of-two driver.
What is the purpose of the NC pins on AD825ARZ-16?
AD825ARZ-16 has ten NC pins (1, 2, 3, 7, 8, 9, 10, 11, 15, 14, 16) - all internally unconnected. These pins must remain floating with no external connection, solder mask coverage, or PCB trace routing. Connecting them risks latch-up or parametric deviation due to parasitic coupling to sensitive internal nodes.
How does AD825ARZ-16 handle capacitive loads compared to standard op-amps?
AD825ARZ-16 integrates an internal compensation capacitor (CF) in its output stage that dynamically adjusts dominant-pole frequency as capacitive load increases - maintaining stability without external isolation resistors. It drives ≥400 pF loads while preserving 80 ns settling time and 44 MHz bandwidth, unlike most general-purpose op-amps that oscillate or ring above 100 pF.
AD825ARZ-16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 140V/µs
- Gain Bandwidth Product:
- 26 MHz
- -3db Bandwidth:
- 46 MHz
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 6.5mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AD825ARZ-16 FAQ
1.How can I place an order for AD825ARZ-16 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD825ARZ-16 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 AD825ARZ-16 reliable?
The price and inventory of AD825ARZ-16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD825ARZ-16 is usually 5 days.
3.What payment methods are accepted for AD825ARZ-16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD825ARZ-16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD825ARZ-16?
AD825ARZ-16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD825ARZ-16 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 AD825ARZ-16?
For technical support, including AD825ARZ-16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD825ARZ-16 requirements.
6.How does Aetrix verify that AD825ARZ-16 is sourced from the original manufacturer or authorized distributors?
All AD825ARZ-16 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 AD825ARZ-16 meets industry standards.
7.What is the process for return or replacement of AD825ARZ-16?
All AD825ARZ-16 units undergo pre-shipment inspection (PSI). If there is an issue with AD825ARZ-16, 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 AD825ARZ-16 part is unused and in its original packaging.
Return procedure for AD825ARZ-16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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