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Texas Instruments OPA827AIDRG4
- Part No.:
- OPA827AIDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA827AIDRG4.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,893
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Product details
Overview
OPA827AIDRG4 from Texas Instruments is a JFET-input precision operational amplifier optimized for low-noise, high-DC-accuracy signal conditioning in 16-bit to 18-bit mixed-signal systems. It delivers 4 nV/√Hz input voltage noise density at 1 kHz, 250 nVPP 0.1-Hz to 10-Hz noise, 150 µV max input offset voltage, and 22 MHz gain bandwidth - enabling high-fidelity ADC driver and transimpedance amplifier functions in ±4 V to ±18 V supply applications.
For engineers reviewing the OPA827AIDRG4 datasheet, OPA827AIDRG4 pinout, OPA827AIDRG4 application, or OPA827AIDRG4 equivalent, key selection criteria include its ultra-low 10 pA max input bias current for high-impedance sensor interfaces, 2 µV/°C max offset drift for stable performance across –40°C to 125°C, and 28 V/µs slew rate supporting fast settling in precision test equipment and seismic instrumentation.
Technical Context
The OPA827AIDRG4 implements a unity-gain-stable JFET input stage with high-impedance (10¹³ Ω ∥ 9 pF) differential and common-mode inputs, enabling direct interfacing with photodiode, piezoelectric, and high-Z sensor outputs. Its architecture balances low voltage noise (4 nV/√Hz) and low current noise (2.2 fA/√Hz), making it optimal for source impedances above 10 kΩ where current noise dominates.
It operates across ±4 V to ±18 V supplies with 4.8 mA typical quiescent current per channel and features rail-to-rail output swing limited by ±3 V headroom, supporting precision ±10-V front ends and PLL filter applications requiring stable DC accuracy and wide dynamic range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 4 nV/√Hz at 1 kHz - enables sub-16-bit noise floor in high-gain, low-frequency sensor amplifiers |
| 0.1 Hz to 10 Hz Noise | 250 nVPP - ensures minimal low-frequency drift in precision integrators and medical front ends |
| Input Offset Voltage | 150 µV maximum - supports 16-bit accuracy without trimming in ±10-V full-scale systems |
| Gain Bandwidth Product | 22 MHz - allows stable closed-loop operation up to 10× gain with >2 MHz small-signal bandwidth |
| Slew Rate | 28 V/µs - achieves <850 ns settling to 16-bit accuracy (±0.00075%) for 10-V steps |
| Input Bias Current | 10 pA maximum - preserves signal integrity in transimpedance amplifiers with >1 GΩ feedback resistors |
| Supply Voltage Range | ±4 V to ±18 V - supports dual-supply industrial and test equipment without level-shifting circuitry |
Pinout & Package
OPA827AIDRG4 is packaged in an 8-pin SOIC (D package) with nominal body size 4.90 mm × 3.91 mm, rated for operation from –40°C to 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No internal connection (NC) | Must be left floating; no PCB routing or grounding required |
| 2 | Inverting input (–IN) | Differential input node for feedback networks and inverting configurations |
| 3 | Noninverting input (+IN) | High-impedance input for reference signals or sensor connections |
| 4 | Negative power supply (V–) | Connects to negative rail; decoupling capacitor required within 1 cm |
| 6 | Output (OUT) | Capable of sourcing/sinking 30 mA; drives 100 pF loads with <1% overshoot |
| 7 | Positive power supply (V+) | Connects to positive rail; requires local 0.1-µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.1-Hz to 10-Hz noise | 250 nVPP enables stable baseline in EEG and seismic charge amplifiers |
| JFET input architecture | 10¹³ Ω input impedance prevents loading of high-Z sensors like photodiodes |
| Low input offset drift | 2 µV/°C max ensures <1 LSB error over temperature in 18-bit data acquisition |
| Wide supply range | ±4 V to ±18 V operation eliminates need for external regulators in ±15-V test benches |
| Unity-gain stability | Guaranteed stable with gain ≥ 1, simplifying design of buffers and active filters |
Applications
| ADC Drivers | DAC Output Buffers |
|---|---|
Use Scenario: Driving SAR or delta-sigma ADC inputs in precision data loggers with ±10-V full-scale ranges. IC Role / Device Role / Timing Role: Precision buffer isolating DAC output from ADC sampling kickback; maintains linearity during acquisition window. Use Value: 150 µV max offset and 22 MHz GBW ensure <0.001% gain error and <1 µs settling to 16-bit accuracy. | Use Scenario: Buffering high-resolution DAC outputs in automated test equipment requiring low distortion and DC stability. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage follower ensuring monotonicity and minimizing code-dependent errors. Use Value: 4 nV/√Hz noise and 2 µV/°C drift preserve 18-bit resolution across temperature and frequency. |
| Transimpedance Amplifiers | PLL Filters |
Use Scenario: Converting photocurrent from low-light optical sensors into precise voltage signals in analytical instrumentation. IC Role / Device Role / Timing Role: High-Z JFET input minimizes bias current error; low 10 pA max IB enables >1 GΩ feedback resistors. Use Value: 2.2 fA/√Hz current noise and 250 nVPP 0.1–10 Hz noise maximize dynamic range in low-frequency photon counting. | Use Scenario: Implementing loop filters in RF synthesizers where phase noise and long-term stability are critical. IC Role / Device Role / Timing Role: Precision op amp forming integrator stage in third-order passive-active PLL filters. Use Value: 150 µV max VOS and 2 µV/°C drift prevent DC drift-induced frequency offset and lock-time degradation. |
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 |
|---|---|---|---|
| OPA828IDR | Lower 0.1–10 Hz noise (150 nVPP typ), improved 0.5 µV/°C max drift, but higher 6.5 mA IQ | Better for ultra-low-drift lab-grade instrumentation; less suitable for power-constrained portable designs | Select OPA828IDR when sub-1-µV total drift over temperature is mandatory and supply current is secondary |
| ADA4625-1ARZ | Higher 5.8 nV/√Hz noise at 1 kHz, lower 2.2 pA max IB, wider 36 V single-supply range | Preferred for single-supply battery-powered sensors; not optimal for dual-supply ±15-V test gear | Choose ADA4625-1ARZ for single-rail systems requiring rail-to-rail input and <3 pA IB, not for low-noise dual-supply precision |
Compared with OPA827AIDRG4, OPA828IDR offers tighter DC specs at higher quiescent current, while ADA4625-1ARZ trades voltage noise for single-supply flexibility and lower bias current - making OPA827AIDRG4 the balanced choice for dual-supply, low-noise, high-impedance applications demanding proven thermal stability.
Availability
OPA827AIDRG4 is available at Aetrix Electronics and suitable for precision data acquisition, medical instrumentation, and test equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for OPA827AIDRG4 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 expertise in precision amplifiers and signal chain solutions.
The OPA827 series was designed specifically for high-resolution mixed-signal systems demanding simultaneous low noise, low drift, and low input bias current - targeting 16-bit to 18-bit data converters, seismic sensors, and professional audio front ends.
FAQ
What is the maximum input bias current specification for OPA827AIDRG4?
The OPA827AIDRG4 has a maximum input bias current of ±10 pA over the full operating temperature range (–40°C to 125°C), with typical values as low as ±3 pA at 25°C. This ultra-low IB enables use with high-value feedback resistors in transimpedance amplifiers and prevents significant DC error in high-impedance sensor interfaces. The JFET input architecture directly enables this performance, and the value is explicitly specified in the Electrical Characteristics table of the official TI datasheet SBOS376I.
Does OPA827AIDRG4 support ±15-V operation?
Yes, OPA827AIDRG4 is fully specified for ±15-V operation, falling within its recommended supply range of ±4 V to ±18 V. At ±15 V, key parameters including 4 nV/√Hz input voltage noise density, 250 nVPP 0.1–10 Hz noise, and 22 MHz gain bandwidth are guaranteed. The device also supports asymmetric supplies (e.g., +15 V/–5 V), provided total supply voltage remains ≥8 V and ≤36 V, as confirmed in Section 7.3.1 of the TI datasheet SBOS376I.
What is the guaranteed settling time to 16-bit accuracy for OPA827AIDRG4?
The OPA827AIDRG4 guarantees 850 ns settling time to ±0.00075% (16-bit) accuracy for a 10-V step under G = –1 configuration with CL = 100 pF, as specified in the Electrical Characteristics table. This performance is enabled by its 28 V/µs slew rate and 22 MHz gain bandwidth. Measured data shows consistent behavior across temperature, and the value is validated in Figure 36 of the TI datasheet SBOS376I using actual oscilloscope waveforms.
Is OPA827AIDRG4 unity-gain stable?
Yes, OPA827AIDRG4 is explicitly unity-gain stable, as stated in Section 7.1 ("Overview") and confirmed in the "Features" section of the TI datasheet SBOS376I. It maintains phase margin >45° and exhibits no peaking or oscillation when configured as a voltage follower (G = +1). This eliminates the need for external compensation in buffer, active filter, or gain-of-one reference applications - a key differentiator from decompensated op amps requiring minimum gain constraints.
What package type does OPA827AIDRG4 use?
OPA827AIDRG4 uses the 8-pin SOIC (D package) with nominal dimensions 4.90 mm × 3.91 mm, as documented in the "Device Information" table and "Mechanical, Packaging, and Orderable Information" section of the TI datasheet SBOS376I. The "DRG4" suffix denotes tape-and-reel packaging per JEDEC standard J-STD-020, and the part is rated for operation from –40°C to 125°C ambient temperature.
OPA827AIDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
OPA827AIDRG4 FAQ
1.How can I place an order for OPA827AIDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA827AIDRG4 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 OPA827AIDRG4 reliable?
The price and inventory of OPA827AIDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA827AIDRG4 is usually 5 days.
3.What payment methods are accepted for OPA827AIDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA827AIDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA827AIDRG4?
OPA827AIDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA827AIDRG4 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 OPA827AIDRG4?
For technical support, including OPA827AIDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA827AIDRG4 requirements.
6.How does Aetrix verify that OPA827AIDRG4 is sourced from the original manufacturer or authorized distributors?
All OPA827AIDRG4 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 OPA827AIDRG4 meets industry standards.
7.What is the process for return or replacement of OPA827AIDRG4?
All OPA827AIDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA827AIDRG4, 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 OPA827AIDRG4 part is unused and in its original packaging.
Return procedure for OPA827AIDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA827AIDRG4 Tags
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