OPA827 - Low-Noise JFET Op Amp | Texas Instruments
MPN: OPA827 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for OPA827 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
OPA828
✅ Drop-In📋 Reference alternative (not in catalog)
OPA2828
✅ Drop-In📋 Reference alternative (not in catalog)
OPA827AID
✅ Drop-In📋 Reference alternative (not in catalog)
OPA827AIDR
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4627-1ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4610-1ARZ
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →OPA827 Maximum Ratings & Electrical Characteristics
| Number of Channels | 1 |
| Supply Voltage Range (Dual) | ±4 V to ±18 V |
| Supply Voltage Range (Single) | 8 V to 36 V |
| Input Offset Voltage (Max) | 150 µV |
| Input Offset Drift (Typ) | 0.5 µV/°C |
| Input Bias Current (Typ) | 3 pA |
| Input Voltage Noise Density (10 kHz) | 4 nV/√Hz |
| Input Voltage Noise (0.1-10 Hz) | 250 nVPP |
| Gain Bandwidth Product | 22 MHz |
| Slew Rate | 28 V/µs |
| Open-Loop Gain | 120 dB |
| Output Current (Typ) | 30 mA |
| Operating Temperature Range | -40°C to +125°C |
| Package Options | 8-SOIC, 8-VSSOP |
| RoHS Status | Compliant |
OPA827 Pin Configuration
| Pin 1 | OFFSET N1 — Offset null pin 1 |
| Pin 2 | IN- — Inverting input |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | OFFSET N2 — Offset null pin 2 |
| Pin 6 | OUT — Output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | NC — No connection |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
OPA827 is suitable for 6 applications: High-End Audio Preamplifier, Precision Data Acquisition, Active Filter, Photodiode Amplifier, Medical Instrumentation, Test and Measurement.
High-End Audio Preamplifier
The OPA827's low noise (4 nV/√Hz) and low distortion make it ideal for high-end audio preamplifiers. It provides clean signal amplification with minimal coloration, preserving audio fidelity. Its high slew rate (28 V/µs) ensures accurate reproduction of fast transients, while its low offset voltage (150 µV) eliminates the need for DC blocking capacitors in many designs.
Recommended
Precision Data Acquisition
In precision data acquisition systems, the OPA827's low offset voltage (150 µV max) and low drift (0.5 µV/°C) ensure accurate signal conditioning. Its low bias current (3 pA) minimizes errors when interfacing with high-impedance sensors. The wide supply range (up to ±18 V) accommodates various ADC input ranges, and its 22 MHz bandwidth supports high-speed sampling.
Recommended
Active Filter
The OPA827 is well-suited for active filters due to its high open-loop gain (120 dB) and unity-gain stability. Its low noise and low distortion preserve signal integrity in filters for audio and instrumentation. The 22 MHz gain bandwidth product allows implementation of filters up to several MHz, while the JFET input minimizes loading on preceding stages.
Recommended
Photodiode Amplifier
The OPA827's low input bias current (3 pA) and low voltage noise (4 nV/√Hz) make it excellent for photodiode transimpedance amplifiers. It accurately converts small photocurrents to voltage with minimal error. The high bandwidth (22 MHz) supports fast optical signals, and the low offset voltage reduces DC errors in the output.
Recommended
Medical Instrumentation
In medical instrumentation, the OPA827's precision and low noise are critical for accurate signal acquisition. Its low offset voltage and drift ensure reliable measurements over temperature. The low bias current is ideal for high-impedance electrodes, and the wide supply range supports various medical device power rails. The device's reliability and extended temperature range (-40°C to +125°C) make it suitable for demanding medical environments.
Recommended
Test and Measurement
The OPA827 is ideal for test and measurement equipment due to its high precision and low noise. It provides accurate signal conditioning in oscilloscopes, spectrum analyzers, and data loggers. Its low offset voltage and drift ensure measurement accuracy, while the high bandwidth supports high-frequency signals. The JFET input minimizes loading on the device under test.
Recommended
Recommended Products Summary
Engineering reference data for OPA827 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA828 | OPA2828 | ADA4627-1ARZ |
|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Input Offset Voltage (Max) | 150 µV | 500 µV | 500 µV | 200 µV |
| Input Bias Current (Typ) | 3 pA | 10 pA | 10 pA | 10 pA |
| Voltage Noise Density (10 kHz) | 4 nV/√Hz | 4 nV/√Hz | 4 nV/√Hz | 3.8 nV/√Hz |
| Gain Bandwidth Product | 22 MHz | 45 MHz | 45 MHz | 19 MHz |
| Slew Rate | 28 V/µs | 150 V/µs | 150 V/µs | 48 V/µs |
| Supply Voltage Range (Dual) | ±4 V to ±18 V | ±4 V to ±18 V | ±4 V to ±18 V | ±5 V to ±15 V |
Key Differentiators
- Lower input offset voltage (150 µV max) compared to OPA828 (vs OPA828)
- Lower input bias current (3 pA) compared to ADA4627-1ARZ (vs ADA4627-1ARZ)
- Wider supply voltage range (±18 V) compared to ADA4627-1ARZ (vs ADA4627-1ARZ)
Design Notes
Decouple the power supply pins with 0.1 µF ceramic capacitors placed as close as possible to the V+ and V- pins. Additionally, use a 10 µF tantalum capacitor in parallel for low-frequency decoupling. This is critical for maintaining the OPA827's low noise performance, as power supply noise can couple into the output.
For optimal performance, use a ground plane and keep the input traces short and shielded. The OPA827's JFET input has very high impedance, making it susceptible to noise pickup. Avoid routing high-speed digital traces near the input pins. Also, consider adding a guard ring around the input pins to reduce leakage currents.
Do not exceed the absolute maximum supply voltage of ±20 V. Also, ensure the input common-mode voltage stays within the specified range to avoid phase reversal. When using the offset null pins, connect a potentiometer between them and the wiper to V- to adjust offset, but note that this may affect drift.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
