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Analog Devices Inc. AD8625ARZ-REEL7
- Part No.:
- AD8625ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8625ARZ-REEL7.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:935
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Product details
Overview
AD8625ARZ-REEL7 from Analog Devices is a precision quad JFET-input operational amplifier optimized for low-power, single-supply operation (5 V to 26 V) with rail-to-rail output swing, 5 MHz gain bandwidth, and 1 pA max input bias current. It delivers 500 µV max offset voltage, 630 µA/amp typical supply current, and operates across −40°C to +85°C for photodiode preamplification, precision filtering, and DAC output buffering.
For engineers reviewing the AD8625ARZ-REEL7 datasheet, AD8625ARZ-REEL7 pinout, AD8625ARZ-REEL7 application, or AD8625ARZ-REEL7 equivalent, key selection criteria include verified picoampere input bias stability over temperature, rail-to-rail output drive into ≥1 kΩ loads, low 17.5 nV/√Hz voltage noise density at 1 kHz, and confirmed compatibility with TSSOP-14 packaging for high-density analog signal chains.
Technical Context
The AD8625ARZ-REEL7 implements a true JFET-input stage with n-channel devices enabling sub-picoampere input bias current and wide common-mode input range (0 V to 3 V on 5 V supply). Its bipolar rail-to-rail output stage achieves ≤5 mV saturation voltage at ±2 mA load, supporting full dynamic range in single-supply systems without phase reversal.
It features unity-gain stability with 60° phase margin, supports capacitive loads >500 pF, and maintains 5 MHz GBP across supply voltages from ±2.5 V to ±13 V or 5 V to 26 V. The device is fully specified for industrial temperature operation and exhibits 2.5 µV/°C offset drift over −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA max at 25°C - enables ultra-high-impedance sensor interfaces without significant DC error. |
| Offset Voltage | 500 µV max - ensures <0.01% gain error in 14-bit DAC buffer applications with 5 V reference. |
| Gain Bandwidth Product | 5 MHz - supports stable closed-loop operation up to 100 kHz full-power bandwidth with 20 Vpp signals. |
| Rail-to-Rail Output Swing | Within 5 mV of rails at ±2 mA - maximizes usable dynamic range in 3.3 V or 5 V single-supply systems. |
| Supply Current per Amplifier | 630 µA typ - allows four-channel operation at <2.6 mA total, suitable for battery-powered instrumentation. |
| Voltage Noise Density | 17.5 nV/√Hz at 1 kHz - contributes negligible noise in transimpedance amplifiers with Rf ≥ 1 MΩ. |
| Common-Mode Rejection Ratio | 87 dB min - suppresses supply ripple and ground bounce in noisy industrial environments. |
Pinout & Package
AD8625ARZ-REEL7 is housed in a 14-lead TSSOP package (RU suffix), RoHS-compliant, moisture-sensitive level 1, with exposed pad not connected internally. Pin spacing is 0.65 mm, body dimensions 5.0 mm × 4.4 mm × 1.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT D | Output of fourth amplifier channel; capable of sourcing/sinking ±10 mA with rail-to-rail swing. |
| 2 | –IN D | Inverting input of fourth channel; high-impedance JFET node with 1 pA max bias current. |
| 3 | +IN D | Noninverting input of fourth channel; accepts common-mode voltage from V– to (V+ – 2 V). |
| 4 | V– | Negative power supply terminal; referenced to system ground in single-supply configurations. |
| 5 | +IN C | Noninverting input of third channel; identical electrical characteristics to +IN D. |
| 6 | –IN C | Inverting input of third channel; matched to –IN D for dual-channel differential applications. |
| 7 | OUT C | Output of third amplifier channel; electrically isolated from other outputs per channel. |
| 8 | V+ | Positive power supply terminal; supports 5 V to 26 V or ±2.5 V to ±13 V operation. |
| 9 | –IN B | Inverting input of second channel; shares same input stage architecture as all channels. |
| 10 | +IN B | Noninverting input of second channel; validated for operation within 0.2 V below V–. |
| 11 | OUT B | Output of second amplifier channel; drives loads ≥1 kΩ without stability degradation. |
| 12 | +IN A | Noninverting input of first channel; used in photodiode transimpedance configurations. |
| 13 | –IN A | Inverting input of first channel; connects directly to photodiode cathode in standard preamp layout. |
| 14 | OUT A | Output of first amplifier channel; commonly configured as unity-gain buffer for CMOS DACs. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under input overvoltage conditions up to +VS + 300 mV, eliminating output latch-up risk in sensor front-ends. |
| True single-supply operation | Input common-mode range extends to 0.2 V below V–, enabling direct interfacing with ground-referenced sensors. |
| Low input current drift | Doubles every 10°C rise - design requires thermal management to maintain ≤1 pA bias in precision measurement systems. |
| Capacitive load drive | Stable with >500 pF loads - eliminates need for external isolation resistors in filter and ADC driver applications. |
| High channel separation | 104 dB at 1 kHz - prevents crosstalk between channels in multi-signal conditioning circuits like 8-pole Sallen-Key filters. |
Applications
| Photodiode Signal Conditioning | Precision DAC Output Buffering |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in optical smoke detectors and spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1.5 MΩ feedback resistor and 5 pF compensation capacitor. Use Value: 1 pA input bias minimizes dark-current-induced offset; 500 µV VOS limits output error to <0.8 mV in 100 nA photocurrent detection. |
Use Scenario: Driving unipolar 14-bit DACs (e.g., AD5552) in portable data acquisition systems. IC Role / Device Role / Timing Role: Rail-to-rail output buffer with unity gain and 5 MHz bandwidth. Use Value: 630 µA quiescent current enables four-channel buffering at <2.6 mA; 500 µV VOS avoids trimming for 300 µV LSB accuracy. |
| Industrial Sensor Signal Conditioning | Multi-Pole Precision Low-Pass Filtering |
Use Scenario: Amplifying millivolt-level outputs from RTDs and thermocouples in PLC analog input modules. IC Role / Device Role / Timing Role: High-Z instrumentation amplifier front-end with programmable gain. Use Value: 87 dB CMRR rejects common-mode noise from 50/60 Hz AC mains; 2.5 µV/°C drift ensures <10 µV error over 40°C ambient range. |
Use Scenario: Implementing 10 Hz 8-pole Sallen-Key anti-aliasing filters in seismic monitoring equipment. IC Role / Device Role / Timing Role: Four independent amplifier stages in cascaded active filter topology. Use Value: Picoampere input bias allows use of >100 kΩ resistors without DC gain error; 17.5 nV/√Hz noise preserves SNR in sub-Hz bandwidths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8626ARMZ-REEL | Dual-channel SOIC/MSOP; 630 µA/amp supply current; identical VOS, IB, GBP specs. | Lacks two amplifier channels; requires PCB redesign for quad-channel signal paths. | Select when only two precision amplifiers are needed and MSOP footprint is preferred for space-constrained layouts. |
| OPA2134UA | Bipolar input (not JFET); 800 pA max IB at 25°C; 8 MHz GBP; higher 12 nV/√Hz noise. | Higher input current degrades photodiode SNR; wider bandwidth increases susceptibility to RF interference. | Choose only if higher speed is required and source impedances remain <100 kΩ to limit IB-induced errors. |
Compared with AD8626ARMZ-REEL, AD8625ARZ-REEL7 provides two additional matched amplifier channels in TSSOP-14 without increasing per-channel power or noise. Versus OPA2134UA, it trades 3 MHz extra bandwidth for 20× lower input bias current and superior low-frequency noise performance critical in sensor front-ends.
Availability
AD8625ARZ-REEL7 is available at Aetrix Electronics and suitable for photodiode preamplification, precision DAC buffering, and multi-pole active filtering requiring stable component supply, long-term production continuity, and guaranteed industrial temperature performance.
Supply support for AD8625ARZ-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 centers worldwide and ISO 9001-certified manufacturing.
The AD862x family was engineered specifically for low-power, high-precision analog signal conditioning in single-supply systems - targeting photodiode transimpedance amplification, battery-operated instrumentation, and automotive sensor interfaces where picoampere input bias and rail-to-rail output are essential.
FAQ
What is the maximum capacitive load the AD8625ARZ-REEL7 can drive stably?
The AD8625ARZ-REEL7 is characterized for stable operation with capacitive loads exceeding 500 pF, as confirmed in the datasheet's Typical Performance Characteristics (Figure 31 and Figure 32). This eliminates the need for series isolation resistors in most filter and ADC driver applications, though layout parasitics should be minimized to preserve phase margin.
Does the AD8625ARZ-REEL7 support true rail-to-rail input operation?
The AD8625ARZ-REEL7 does not support rail-to-rail input - its input common-mode voltage range extends from 0.2 V below V– to 2 V below V+, as specified in the General Description. Driving inputs within 2 V of V+ increases common-mode error and reduces bandwidth, as shown in Figure 15 of the datasheet.
Can the AD8625ARZ-REEL7 be used with a 3.3 V single supply?
Yes - the AD8625ARZ-REEL7 supports single-supply operation from 5 V minimum, so 3.3 V is below its specified operating range. Using 3.3 V risks violating absolute maximum ratings and invalidates all parametric guarantees; a minimum 5 V supply is required for compliant operation.
How does input bias current vary with temperature in the AD8625ARZ-REEL7?
Per Figure 8 in the datasheet, AD8625ARZ-REEL7 input bias current approximately doubles for every 10°C rise in junction temperature. At 25°C it is ≤1 pA; at +85°C it rises to ≤60 pA. Thermal management - including low supply voltage, minimal output loading, and PCB copper pour - is essential to maintain picoampere performance.
Is the AD8625ARZ-REEL7 pin-compatible with other AD862x variants?
No - AD8625ARZ-REEL7 uses a 14-lead TSSOP package with unique quad-channel pinout (RU suffix), while AD8626 is dual-channel in SOIC/MSOP (R/RM) and AD8627 is single-channel in SC70/SOIC (KS/R). Pin mapping, channel count, and package dimensions differ; PCB layout must be specific to AD8625ARZ-REEL7.
AD8625ARZ-REEL7 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:
- 5V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.25 pA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 710µA (x4 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
AD8625ARZ-REEL7 FAQ
1.How can I place an order for AD8625ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8625ARZ-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 AD8625ARZ-REEL7 reliable?
The price and inventory of AD8625ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8625ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8625ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8625ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8625ARZ-REEL7?
AD8625ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8625ARZ-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 AD8625ARZ-REEL7?
For technical support, including AD8625ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8625ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8625ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8625ARZ-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 AD8625ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8625ARZ-REEL7?
All AD8625ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8625ARZ-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 AD8625ARZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8625ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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