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Analog Devices Inc. AD8625ARUZ-REEL
- Part No.:
- AD8625ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8625ARUZ-REEL.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,866
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Product details
Overview
AD8625ARUZ-REEL from Analog Devices is a precision quad JFET-input operational amplifier in 14-lead TSSOP (RU) package, delivering rail-to-rail output, 5 MHz gain bandwidth, 5 V/µs slew rate, and 500 µV max offset voltage at 25°C. It operates from single 5 V to 26 V or dual ±2.5 V to ±13 V supplies and supports photodiode transimpedance amplification, precision instrumentation, and DAC output buffering.
For engineers reviewing the AD8625ARUZ-REEL datasheet, AD8625ARUZ-REEL pinout, AD8625ARUZ-REEL application, or AD8625ARUZ-REEL equivalent, key selection criteria include picoampere input bias current (1 pA max), low 630 µA/amp supply current, −40°C to +85°C industrial temperature range, and confirmed compatibility with capacitive loads >500 pF without instability.
Technical Context
The AD8625ARUZ-REEL uses n-channel JFET input stage for ultra-low input bias current and high input impedance, enabling accurate signal conditioning of high-impedance sources like photodiodes. Its rail-to-rail output stage swings within 5 mV of rails at 2 mA load and maintains stability with >500 pF capacitive loads.
It features true single-supply operation with input common-mode range extending 0.2 V below V− and 2 V below V+, no phase reversal under overdrive, and unity-gain stability. The device is fully specified across −40°C to +85°C and exhibits 2.5 µV/°C offset drift and 17.5 nV/√Hz voltage noise density at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 5 MHz - enables stable closed-loop operation up to 100 kHz full-power bandwidth with 20 VPP signals. |
| Input Bias Current | 1 pA max at 25°C - minimizes error in high-Z sensor interfaces (e.g., photodiodes, piezoelectrics). |
| Offset Voltage | 500 µV max at 25°C - supports 14-bit DAC buffering without zero-code trimming (LSB = 300 µV @ 5 V ref). |
| Supply Current per Amplifier | 630 µA typ - allows four-channel operation at <2.6 mA total, suitable for battery-powered instrumentation. |
| Rail-to-Rail Output Swing | Within 5 mV of rails at 2 mA - maximizes dynamic range in single-supply systems (e.g., 0–5 V ADC front-ends). |
| Input Voltage Range | 0 V to 3 V @ 5 V supply - accommodates inputs down to negative rail, critical for ground-referenced sensors. |
| Phase Margin | 60° - ensures stable unity-gain operation with minimal overshoot into capacitive loads. |
Pinout & Package
AD8625ARUZ-REEL is housed in a 14-lead TSSOP (RU suffix) package with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC TSSOP layout (pin 1 marked by dot or bevel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply rail connection; supports single-supply (ground) or dual-supply (−V) operation. |
| 2 | OUT A | Amplifier A output; rail-to-rail capable, drives loads ≥600 Ω without saturation. |
| 3 | −IN A | Inverting input for Channel A; high-impedance JFET node (IB ≤1 pA). |
| 4 | +IN A | Noninverting input for Channel A; common-mode range extends to V− −0.2 V. |
| 5 | V+ | Positive supply rail; accepts 5 V to 26 V (single) or ±2.5 V to ±13 V (dual). |
| 6 | +IN B | Noninverting input for Channel B; electrically isolated from other channels. |
| 7 | −IN B | Inverting input for Channel B; matched offset and bias characteristics with Channel A. |
| 8 | OUT B | Amplifier B output; identical performance to OUT A, supports independent channel use. |
| 9 | OUT C | Amplifier C output; quad configuration enables multi-stage filtering or signal routing. |
| 10 | −IN C | Inverting input for Channel C; validated for low-noise, low-drift operation in precision filters. |
| 11 | +IN C | Noninverting input for Channel C; supports rail-to-rail input common-mode range. |
| 12 | +IN D | Noninverting input for Channel D; enables simultaneous processing of four independent analog signals. |
| 13 | −IN D | Inverting input for Channel D; matched DC specs ensure consistent channel-to-channel performance. |
| 14 | OUT D | Amplifier D output; fully specified for 100 kHz full-power bandwidth and 0.1% settling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA max enables sub-picoampere resolution in photodiode preamps and electrometer circuits. |
| Rail-to-rail output swing | Within 5 mV of supply rails at 2 mA load preserves full dynamic range in 3.3 V/5 V systems. |
| No phase reversal | Guaranteed under input overdrive conditions prevents catastrophic signal inversion in sensor front-ends. |
| Stable with >500 pF capacitive loads | Eliminates need for external isolation resistors when driving ADC inputs or long cables. |
| Low 17.5 nV/√Hz voltage noise | Minimizes contribution to total system noise in high-gain, wideband applications (e.g., 8-pole Sallen-Key filters). |
| Industrial temperature range | −40°C to +85°C operation validated for automotive sensors and industrial control environments. |
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 current limits output error to <0.75 µV, enabling 95 dB SNR at 30 kHz bandwidth per Figure 45. |
Use Scenario: Buffering unipolar output of AD5551/AD5552 14-bit DACs in portable test equipment. IC Role / Device Role / Timing Role: Current-to-voltage converter with rail-to-rail input/output, eliminating zero-code offset trims. Use Value: 500 µV max offset voltage avoids >1.6 LSB error; 5 MHz bandwidth supports fast DAC settling without added time constant. |
| 8-Pole Precision Low-Pass Filtering | Automotive Sensor Signal Conditioning |
Use Scenario: Implementing 10 Hz anti-aliasing filter for vibration monitoring in predictive maintenance systems. IC Role / Device Role / Timing Role: Quad op-amp configured as cascaded Sallen-Key stages (Figure 49), using high-value resistors (162 kΩ–816 kΩ). Use Value: Picoampere input bias prevents DC gain error accumulation across 8 poles; low noise preserves signal integrity below 10 Hz. |
Use Scenario: Conditioning signals from thermistor-based cabin temperature sensors and pressure transducers in vehicle ECUs. IC Role / Device Role / Timing Role: Single-supply amplifier interfacing ratiometric sensors to 12-bit microcontroller ADCs. Use Value: Input range extending to V− −0.2 V allows direct ground-referenced sensor connections; 2.5 µV/°C drift minimizes calibration frequency. |
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 MSOP-8; same core specs but fewer channels and different package thermal resistance (θJA = 210°C/W vs. 180°C/W). | Limited to two amplifiers; preferred where board space is constrained and quad functionality is unnecessary. | Select AD8626ARMZ-REEL when dual-channel count suffices and MSOP footprint is required for layout compatibility. |
| OPA2134UA | Bipolar input (vs. JFET); higher 500 pA IB, 8 nV/√Hz noise, and 200 µV VOS - less suitable for ultra-high-Z sources. | Lower cost; acceptable in audio and general-purpose instrumentation where input impedance >1012 Ω is not required. | Choose OPA2134UA only if budget constraints outweigh need for picoampere-level input current and sub-mV offset. |
Compared with AD8626ARMZ-REEL, AD8625ARUZ-REEL provides two additional amplifiers in TSSOP for multi-stage signal chains without increasing channel count per package; versus OPA2134UA, it delivers 500× lower input bias current critical for photodiode and electrometer designs.
Availability
AD8625ARUZ-REEL is available at Aetrix Electronics and suitable for photodiode amplification, precision DAC buffering, and 8-pole active filtering requiring stable component supply across industrial, automotive, and test equipment programs.
Supply support for AD8625ARUZ-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 AD862x family was designed specifically for precision, low-power, single-supply JFET op-amp applications including photodiode transimpedance amplification, battery-powered instrumentation, and high-resolution DAC output stages.
FAQ
What is the maximum capacitive load the AD8625ARUZ-REEL can drive without instability?
The AD8625ARUZ-REEL is characterized for stable operation with capacitive loads exceeding 500 pF, as confirmed in the datasheet's Typical Performance Characteristics (Figure 31–32). This eliminates the need for series isolation resistors when driving ADC inputs, long traces, or coaxial cables-critical for maintaining signal fidelity in data acquisition systems using AD8625ARUZ-REEL.
Does the AD8625ARUZ-REEL support true rail-to-rail input operation?
The AD8625ARUZ-REEL supports rail-to-rail *output* swing but has a limited rail-to-rail *input* common-mode range: it extends from 0.2 V below V− to 2 V below V+. Driving the input within 2 V of V+ increases common-mode error and reduces bandwidth, as shown in Figure 15. Therefore, AD8625ARUZ-REEL is not a true rail-to-rail input amplifier.
Can the AD8625ARUZ-REEL be used in dual-supply configurations?
Yes, the AD8625ARUZ-REEL is fully specified for dual-supply operation from ±2.5 V to ±13 V. Electrical characteristics tables (Table 2) confirm performance at ±13 V, including ±12.92 V output swing, 15 mA output current, and 105 dB CMRR. This makes AD8625ARUZ-REEL suitable for legacy industrial systems requiring bipolar rails.
What is the thermal performance of the AD8625ARUZ-REEL in its TSSOP package?
The AD8625ARUZ-REEL in 14-lead TSSOP (RU) has a junction-to-ambient thermal resistance (θJA) of 180°C/W, as documented in Table 4 of the datasheet. With typical supply current of 2.52 mA (4 × 630 µA) at 5 V, power dissipation remains ~12.6 mW, resulting in <2.3°C junction-to-ambient rise-well within safe operating limits for continuous use.
How does the AD8625ARUZ-REEL minimize errors in photodiode transimpedance applications?
The AD8625ARUZ-REEL minimizes photodiode errors via 1 pA max input bias current (limiting feedback-resistor-induced offset), 500 µV max offset voltage (reducing shunt-resistance-dependent current error), and low 17.5 nV/√Hz noise (preserving SNR). As verified in Figure 45, these specs yield negligible output error and 95 dB SNR at 30 kHz-key advantages of AD8625ARUZ-REEL in optical sensing.
AD8625ARUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
AD8625ARUZ-REEL FAQ
1.How can I place an order for AD8625ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8625ARUZ-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 AD8625ARUZ-REEL reliable?
The price and inventory of AD8625ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8625ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8625ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8625ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8625ARUZ-REEL?
AD8625ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8625ARUZ-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 AD8625ARUZ-REEL?
For technical support, including AD8625ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8625ARUZ-REEL requirements.
6.How does Aetrix verify that AD8625ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8625ARUZ-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 AD8625ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8625ARUZ-REEL?
All AD8625ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8625ARUZ-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 AD8625ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD8625ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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