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Texas Instruments OPA827AIDG4
- Part No.:
- OPA827AIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA827AIDG4.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
OPA827AIDG4 from Texas Instruments is a JFET-input precision operational amplifier optimized for low-noise, high-DC-accuracy signal conditioning in ±4 V to ±18 V dual-supply systems. It delivers 4 nV/√Hz input voltage noise density at 1 kHz, 250 nVPP 0.1 Hz–10 Hz noise, 150 µV max input offset voltage, 2 µV/°C max offset drift, and 22 MHz gain bandwidth - enabling high-fidelity ADC driver and transimpedance amplifier functions in seismic instrumentation and medical front ends.
For engineers reviewing the OPA827AIDG4 datasheet, OPA827AIDG4 pinout, OPA827AIDG4 application, or OPA827AIDG4 equivalent, key selection criteria include its JFET-input ultra-low bias current (10 pA max), wide supply range, 28 V/µs slew rate, and SOIC-8 packaging - all validated across –40°C to +125°C for industrial and test equipment deployment.
Technical Context
The OPA827AIDG4 implements a unity-gain-stable JFET-input architecture with high-impedance differential inputs (10¹³ Ω ∥ 9 pF) and rail-to-rail output swing limited by ±3 V headroom. Its noise performance is characterized by both broadband voltage noise (4 nV/√Hz @ 1 kHz) and low-frequency flicker noise (250 nVPP, 0.1–10 Hz), making it suitable for precision integrators and PLL filter applications where DC stability and spectral purity are critical.
It operates across ±4 V to ±18 V supplies with 4.8 mA typical quiescent current per channel and supports common-mode input ranges from (V–) + 3 V to (V+) – 3 V. The device features 126 dB open-loop gain, 126 dB PSRR at high supply voltages, and no phase reversal under overload conditions - confirmed in TI's production data sheet SBOS376I.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 4 nV/√Hz at 1 kHz - enables low-noise amplification of weak signals from high-impedance sensors without dominating system noise floor. |
| 0.1 Hz–10 Hz Input Noise | 250 nVPP - ensures stable baseline in precision integrators and slow-sampling medical instrumentation. |
| Input Offset Voltage | 150 µV maximum - supports 16-bit to 18-bit system accuracy without trimming in ±10-V front ends. |
| Gain Bandwidth Product | 22 MHz - allows stable closed-loop operation up to ~20 MHz in G = +1 buffer or G = –10 configurations. |
| Slew Rate | 28 V/µs - supports fast settling (850 ns to 0.00075% for 10-V step) in high-speed DAC output buffering. |
| Supply Voltage Range | ±4 V to ±18 V - accommodates legacy ±15-V industrial rails and modern ±5-V or ±12-V systems without redesign. |
| Input Bias Current | 10 pA maximum - preserves signal integrity in transimpedance amplifiers with photodiode or piezoelectric sources >1 MΩ. |
Pinout & Package
OPA827AIDG4 is packaged in an 8-pin SOIC (D package), with nominal body size 4.90 mm × 3.91 mm and standard JEDEC MS-012AC footprint. Pin 1 is NC (no internal connection); pins 2 (–IN), 3 (+IN), 4 (V–), 6 (OUT), and 7 (V+) are functional; pins 1, 5, and 8 are NC and may be left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection (NC) | Internally unconnected; electrically isolated and may be left unconnected or tied to ground for mechanical stability. |
| 2 | Inverting Input (–IN) | Differential input node; high-impedance JFET gate - sensitive to PCB leakage and ESD; requires guarded trace routing. |
| 3 | Noninverting Input (+IN) | Differential input node; matched impedance to –IN; used for reference-biased configurations or unity-gain followers. |
| 4 | Negative Supply (V–) | Return path for dual-supply operation; must be decoupled with 0.1-µF ceramic capacitor placed ≤2 mm from pin. |
| 6 | Output (OUT) | Class-AB buffered output capable of ±30 mA drive into 1-kΩ load; exhibits no phase reversal during overdrive recovery. |
| 7 | Positive Supply (V+) | Power rail for dual-supply operation; requires local 0.1-µF ceramic decoupling; supports asymmetric supplies down to ±4 V total. |
Key Features
| Feature | Design Value |
|---|---|
| JFET input stage | Delivers 10 pA max input bias current and 10¹³ Ω input impedance - essential for guarding high-Z sensor interfaces and minimizing error in transimpedance gain. |
| Low 0.1–10 Hz noise | 250 nVPP integrated noise enables stable DC-coupled operation in seismic geophones and EEG amplifiers without baseline wander. |
| Wide supply range | Operates from ±4 V to ±18 V - eliminates need for external LDOs in mixed-voltage industrial control modules using ±12 V or ±15 V rails. |
| No phase reversal | Guaranteed non-inverting behavior during output saturation - prevents latch-up in active filter feedback loops and PLL charge-pump stages. |
| High PSRR & CMRR | ≥114 dB PSRR and ≥110 dB CMRR over full temperature range - maintains accuracy in noisy power environments like motor-drive analog front ends. |
Applications
| ADC Drivers | DAC Output Buffers |
|---|---|
Use Scenario: Driving SAR or sigma-delta ADC inputs with ±10-V full-scale range while maintaining 16-bit+ linearity. IC Role / Device Role / Timing Role: Precision voltage buffer with low THD+N (–128 dB) and fast settling (850 ns to 16-bit) to prevent aperture uncertainty. Use Value: Enables direct coupling to 18-bit ADCs without AC coupling or trimming, reducing BOM count and board area. |
Use Scenario: Buffering high-resolution DAC outputs in programmable power supplies and calibration equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise output amplifier that rejects supply ripple and maintains monotonicity across temperature. Use Value: Eliminates post-DAC gain errors caused by offset drift, supporting <1 LSB INL over –40°C to +125°C. |
| Transimpedance Amplifiers | PLL Filters |
Use Scenario: Converting photocurrent from low-light optical sensors (e.g., avalanche photodiodes) into precise voltage signals. IC Role / Device Role / Timing Role: High-Z, low-bias-current transimpedance stage with minimal input-referred noise contribution. Use Value: Achieves sub-picoampere resolution due to 10 pA max IB and 4 nV/√Hz en - critical for spectroscopy and LIDAR receivers. |
Use Scenario: Implementing loop filters in frequency synthesizers for wireless base stations and satellite modems. IC Role / Device Role / Timing Role: Low-drift integrator providing stable pole placement and minimal phase jitter accumulation. Use Value: Maintains <100 fs RMS jitter in 100-MHz reference paths by suppressing 1/f noise and supply-induced modulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211AIDGKR | Lower voltage noise (1.1 nV/√Hz), higher current noise (1.3 pA/√Hz), 80 MHz GBW, 5.5 mA IQ | Better for low-source-impedance (<2 kΩ) applications like audio preamps; less optimal for photodiode TIA | Select OPA211AIDGKR when voltage noise dominates system budget and bandwidth >30 MHz is required. |
| ADA4625-1ARZ | Similar JFET input (20 pA IB), 2.9 nV/√Hz noise, 18 MHz GBW, 3.4 mA IQ, –40°C to +125°C rated | Lower quiescent current and better rail-to-rail output swing; slightly higher offset (200 µV max) | Choose ADA4625-1ARZ for battery-powered portable test gear where power efficiency and output headroom are prioritized. |
Compared with OPA211AIDGKR and ADA4625-1ARZ, the OPA827AIDG4 offers the best balance of ultra-low bias current, low 0.1–10 Hz noise, and robust 22-MHz bandwidth - making it uniquely suited for high-impedance, DC-critical applications like seismic sensing and medical diagnostics where long-term drift and low-frequency stability are non-negotiable.
Availability
OPA827AIDG4 is available at Aetrix Electronics and suitable for ADC drivers, transimpedance amplifiers, and precision ±10-V front ends requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA827AIDG4 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision op-amp design and manufacturing.
The OPA827AIDG4 belongs to TI's high-precision JFET-input op-amp product line, engineered specifically for applications demanding ultra-low noise, low drift, and high input impedance - including test & measurement, medical instrumentation, and industrial process control.
FAQ
What is the maximum operating temperature range for the OPA827AIDG4?
The OPA827AIDG4 is specified for continuous operation from –40°C to +125°C ambient temperature, with all key electrical parameters (including offset voltage drift, bias current, and noise) guaranteed across this full industrial and extended automotive range. This rating is confirmed in TI's SBOS376I production data sheet Section 6.3.
Does the OPA827AIDG4 require external compensation for unity-gain stability?
No, the OPA827AIDG4 is internally compensated for unity-gain stability and does not require external compensation components. It remains stable with closed-loop gains ≥1 in both inverting and noninverting configurations, as verified in Figure 25 (Closed-Loop Gain vs Frequency) of the SBOS376I datasheet.
What decoupling capacitors are recommended for the OPA827AIDG4 power pins?
Texas Instruments recommends placing a 0.1-µF ceramic capacitor within 2 mm of each supply pin (V+ and V–) to minimize high-frequency noise coupling and ensure stable operation. For systems with noisy power rails, adding a 10-µF tantalum or aluminum electrolytic capacitor in parallel improves low-frequency PSRR performance.
Can the OPA827AIDG4 drive capacitive loads directly?
The OPA827AIDG4 can drive moderate capacitive loads (≤100 pF) without external isolation resistance, as demonstrated in Figure 28 (Small-Signal Overshoot vs Capacitive Load). For loads >100 pF, a series resistor (typically 10–50 Ω) between the output and capacitance is recommended to maintain phase margin and prevent peaking.
Is the OPA827AIDG4 pin-compatible with other TI precision op-amps in SOIC-8 packages?
The OPA827AIDG4 uses the standard SOIC-8 pinout defined in TI's D-package mechanical drawings, matching pin assignments for –IN, +IN, V–, OUT, and V+. However, it is not a drop-in replacement for op-amps with different input topology (e.g., bipolar-input OPA227) or different quiescent current profiles - circuit-level validation is required before substitution.
OPA827AIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 28V/µs
- Gain Bandwidth Product:
- 22 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 4.8mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA827AIDG4 FAQ
1.How can I place an order for OPA827AIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA827AIDG4 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 OPA827AIDG4 reliable?
The price and inventory of OPA827AIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA827AIDG4 is usually 5 days.
3.What payment methods are accepted for OPA827AIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA827AIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA827AIDG4?
OPA827AIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA827AIDG4 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 OPA827AIDG4?
For technical support, including OPA827AIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA827AIDG4 requirements.
6.How does Aetrix verify that OPA827AIDG4 is sourced from the original manufacturer or authorized distributors?
All OPA827AIDG4 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 OPA827AIDG4 meets industry standards.
7.What is the process for return or replacement of OPA827AIDG4?
All OPA827AIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA827AIDG4, 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 OPA827AIDG4 part is unused and in its original packaging.
Return procedure for OPA827AIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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