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Analog Devices Inc. ADA4627-1BRZ
- Part No.:
- ADA4627-1BRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4627-1BRZ.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
ADA4627-1BRZ from Analog Devices is a 30 V, JFET-input precision operational amplifier optimized for high-speed, low-noise, low-bias-current applications. It delivers 19 MHz gain bandwidth, 82 V/μs slew rate, 6.1 nV/√Hz voltage noise at 1 kHz, and 200 μV max offset voltage - enabling high-fidelity signal conditioning in photodiode amplifiers and precision instrumentation.
For engineers reviewing the ADA4627-1BRZ datasheet, ADA4627-1BRZ pinout, ADA4627-1BRZ application, or ADA4627-1BRZ equivalent, key selection criteria include its ±5 V to ±15 V dual-supply operation, −40°C to +125°C extended temperature range, SOIC_N (R-8) package with exposed pad, and guaranteed 5 pA max input bias current at 25°C.
Technical Context
The ADA4627-1BRZ employs a unity-gain-stable JFET input stage delivering ultra-low input bias current (≤5 pA) and low voltage noise (6.1 nV/√Hz), making it suitable for high-impedance sensor interfaces where leakage and noise dominate error budgets. Its 120 dB typical open-loop gain and 116 dB CMRR ensure precision DC accuracy under varying common-mode conditions.
Designed for demanding analog signal chains, it supports rail-compatible input voltage range (−11 V to +11 V on ±15 V supplies), exhibits no output phase reversal, and maintains stability driving capacitive loads up to 100 pF without external compensation - critical for DAC output buffering and PLL filter stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 19 MHz - enables stable closed-loop operation up to ~10 MHz with gain ≥2, supporting wideband instrumentation and audio signal paths. |
| Slew Rate | 82 V/μs - ensures faithful reproduction of fast-rising signals (e.g., 10 V step in <122 ns), essential for ATE and transient-critical DAC buffers. |
| Input Bias Current | 5 pA max at 25°C - minimizes voltage error across high-value feedback networks (e.g., 1 GΩ in photodiode transimpedance amps). |
| Offset Voltage | 200 μV max - limits DC error to <2 mV in 10× gain stages, reducing need for trimming in medical sensor front-ends. |
| Voltage Noise Density | 6.1 nV/√Hz at 1 kHz - lower than most bipolar op amps, preserving SNR in low-level signal amplification (e.g., thermocouple or strain gauge bridges). |
| Supply Range | ±5 V to ±15 V - supports industrial 24 V systems via dual ±12 V rails and legacy ±15 V test equipment compatibility. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, downhole oil/gas, and industrial control environments without derating. |
Pinout & Package
ADA4627-1BRZ is housed in an 8-lead SOIC_N (R-8) package with exposed thermal pad (connected to V– per datasheet Note 2). Pin 1 is top-left corner marker; pins are numbered counterclockwise. The exposed pad must be soldered to a PCB copper plane for thermal performance (θJA = 155°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–IN) | Differential input node; connects to feedback network in inverting configurations; requires guarding to preserve ≤5 pA bias current. |
| 2 | Noninverting Input (+IN) | Differential input node; used for reference or sensor connection in noninverting gain stages; sensitive to PCB leakage. |
| 3 | Negative Supply (V–) | Power supply return; exposed pad must be connected here for optimal thermal dissipation and PSRR performance. |
| 4 | No Connect (NC) | Internally unconnected; must remain floating - not tied to ground or supply to avoid parasitic coupling. |
| 5 | No Connect (NC) | Internally unconnected; same as Pin 4 - leave unconnected per datasheet Figure 1. |
| 6 | Output (OUT) | Amplified signal output; capable of ±45 mA drive into 1 kΩ load; stable with ≥100 pF capacitive load. |
| 7 | Positive Supply (V+) | Positive power supply rail; bypass with 0.01 μF ceramic + 1 μF bulk capacitor within 3 mm for high-frequency stability. |
| 8 | Offset Null (NULL) | Optional offset trim terminal; not recommended for production use due to drift penalty; omitted in LFCSP variant. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 5 pA max at 25°C - preserves signal integrity in >100 MΩ impedance nodes (e.g., piezoelectric sensors, pH electrodes). |
| Low 1/f noise | 0.86 μV p-p (0.1 Hz to 10 Hz) - minimizes drift-induced errors in precision DC measurements like weigh scales and medical diagnostics. |
| No output phase reversal | Guaranteed over full common-mode range - eliminates catastrophic latch-up risk when inputs approach supply rails in PLL filters or level-shifting circuits. |
| High PSRR & CMRR | 112 dB PSRR / 116 dB CMRR - rejects power supply ripple and common-mode interference in noisy industrial environments (e.g., motor drives, PLC I/O modules). |
| Extended temperature operation | −40°C to +125°C - validated performance across automotive under-hood, aerospace, and energy exploration applications without external heating/cooling. |
Applications
| Photodiode Amplifier | Precision Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in spectrophotometers and laser power meters. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) converting photocurrent to voltage with minimal added noise and offset. Use Value: 6.1 nV/√Hz noise and 5 pA bias current enable sub-picoamp resolution and >120 dB dynamic range in optical sensing. |
Use Scenario: Signal conditioning in portable multimeters, calibration standards, and automated test equipment (ATE) front-ends. IC Role / Device Role / Timing Role: Precision gain stage and buffer for 24-bit ADC drivers and reference voltage followers. Use Value: 200 μV max offset and 1 μV/°C drift ensure <0.01% linearity error over temperature without recalibration. |
| Phase-Locked Loop Filter | DAC Output Amplifier |
Use Scenario: Active loop filter in high-stability RF synthesizers requiring low drift and wide bandwidth. IC Role / Device Role / Timing Role: Integrator and low-pass filter element shaping PLL dynamics and suppressing reference spurs. Use Value: Unity-gain stability, 19 MHz GBW, and no phase reversal allow robust filter response up to 100 kHz without oscillation. |
Use Scenario: Buffering and level-shifting high-resolution DAC outputs (e.g., 16–20 bit) in audio mastering and industrial control. IC Role / Device Role / Timing Role: Low-distortion output driver maintaining THD+N <0.000045% at 1 kHz for fidelity-critical signal paths. Use Value: 82 V/μs slew rate prevents slewing-induced distortion on fast DAC transitions; 120 dB gain ensures accurate gain-setting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4637-1BRZ | Decompensated (stable only at noise gain ≥5); 79 MHz GBW; 170 V/μs slew rate; higher input bias current (10 pA max). | Better suited for fixed-gain ≥5 signal chains (e.g., active filters, high-speed instrumentation), not unity-gain buffers. | Select ADA4637-1BRZ only when gain ≥5 is guaranteed; ADA4627-1BRZ remains preferred for unity-gain stability and lower bias current. |
| OPA140AIDR | JFET input; 11 MHz GBW; 20 V/μs slew rate; 0.4 pA max bias current; single-supply capable (4.5–36 V). | Optimized for low-power, single-supply systems (e.g., battery-powered sensors); lower speed but superior bias current spec. | Choose OPA140AIDR for ultra-low-power, single-rail designs where 11 MHz bandwidth suffices; ADA4627-1BRZ wins in dual-supply, high-speed precision roles. |
Compared with ADA4637-1BRZ and OPA140AIDR, ADA4627-1BRZ uniquely balances unity-gain stability, 19 MHz bandwidth, and ≤5 pA bias current - making it the only option among the three qualified for photodiode TIAs requiring both high speed and femtoamp-level leakage control.
Availability
ADA4627-1BRZ is available at Aetrix Electronics and suitable for precision instrumentation, photodiode amplification, and high-end audio applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4627-1BRZ 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 ADA4627-1BRZ belongs to Analog Devices' high-speed precision op amp family, engineered specifically for applications demanding simultaneous excellence in DC accuracy, AC performance, and ruggedness across harsh operating environments.
FAQ
What is the maximum input bias current specification for ADA4627-1BRZ at 25°C?
The ADA4627-1BRZ has a maximum input bias current of 5 pA at 25°C, as specified in Table 2 of the Rev. F datasheet. This value increases with temperature - reaching up to 2 nA at +125°C - due to JFET junction leakage doubling every ~10°C. For low-leakage design, maintain ambient temperature below 85°C and minimize PCB contamination near pins 1 and 2.
Does ADA4627-1BRZ require external compensation for unity-gain stability?
No, ADA4627-1BRZ is unity-gain stable and does not require external compensation. Its internal compensation ensures stable operation with closed-loop gains of +1 or −1, verified by 72° phase margin at AV = 1 (Figure 7). This distinguishes it from the decompensated ADA4637-1BRZ, which requires minimum noise gain of 5.
Can ADA4627-1BRZ drive a 100 pF capacitive load without oscillation?
Yes, ADA4627-1BRZ is characterized to drive ≥100 pF capacitive loads stably in unity-gain configuration, as confirmed by settling time (550 ns to 0.01%) and overshoot data (Figure 24). For loads >100 pF, add a small series resistor (10–50 Ω) between output and capacitance to isolate reactive feedback.
What is the purpose of Pin 8 (NULL) on ADA4627-1BRZ, and should it be used?
Pin 8 is an offset null terminal provided for compatibility with legacy designs. However, Analog Devices explicitly advises against using it in production: adjusting offset increases temperature drift (several μV/°C per mV trimmed), and the LFCSP variant omits this pin entirely. For system-level offset correction, use auto-zero amplifiers or digital calibration instead of ADA4627-1BRZ's NULL pin.
Is ADA4627-1BRZ suitable for single-supply operation?
ADA4627-1BRZ is specified for dual-supply operation (±5 V to ±15 V) and is not rail-to-rail input. While it can operate from asymmetric supplies (e.g., +15 V / −5 V), true single-supply use (e.g., 0 V / +30 V) violates its input voltage range (−11 V to +11 V on ±15 V rails) and risks ESD diode conduction. For single-supply designs, consider OPA140AIDR or ADA4661-2 instead.
ADA4627-1BRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 84V/µs
- Gain Bandwidth Product:
- 19 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADA4627-1BRZ FAQ
1.How can I place an order for ADA4627-1BRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4627-1BRZ 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 ADA4627-1BRZ reliable?
The price and inventory of ADA4627-1BRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4627-1BRZ is usually 5 days.
3.What payment methods are accepted for ADA4627-1BRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4627-1BRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4627-1BRZ?
ADA4627-1BRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4627-1BRZ 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 ADA4627-1BRZ?
For technical support, including ADA4627-1BRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4627-1BRZ requirements.
6.How does Aetrix verify that ADA4627-1BRZ is sourced from the original manufacturer or authorized distributors?
All ADA4627-1BRZ 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 ADA4627-1BRZ meets industry standards.
7.What is the process for return or replacement of ADA4627-1BRZ?
All ADA4627-1BRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4627-1BRZ, 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 ADA4627-1BRZ part is unused and in its original packaging.
Return procedure for ADA4627-1BRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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