My Inquiry
My Account
Texas Instruments OPA627SM
- Part No.:
- OPA627SM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
OPA627SM.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,362
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA627SM from Texas Instruments is a precision, unity-gain stable JFET-input operational amplifier designed for high-impedance, low-noise signal conditioning in demanding analog systems. It delivers 4.5 nV/√Hz input voltage noise at 10 kHz, ±100 µV maximum input offset voltage, and 550 ns settling time to 0.01% - enabling use in high-resolution DAC output stages, ultrasound front-ends, and precision instrumentation amplifiers.
For engineers reviewing the OPA627SM datasheet, OPA627SM pinout, OPA627SM application, or OPA627SM equivalent, key selection criteria include its –55°C to +125°C extended temperature range, SOIC-8 package compatibility, unity-gain stability, and verified performance under ±15 V dual-supply operation with 7.5 mA quiescent current.
Technical Context
The OPA627SM employs dielectrically isolated complementary NPN/PNP process technology with laser-trimmed input circuitry, achieving bipolar-level accuracy without sacrificing FET input impedance (10 TΩ differential). Its internal cascode architecture maintains sub-5 pA input bias current across ±11.5 V common-mode range while supporting ±18 V supply operation.
This variant belongs to the OPA6x7 family optimized for precision-high-speed trade-offs: unlike the faster OPA637SM (gain ≥5 stable), the OPA627SM guarantees stability at unity gain, making it suitable for buffer, active filter, and sensor interface configurations where phase margin and closed-loop robustness are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4.5 nV/√Hz at 10 kHz - enables low-noise amplification of microvolt-level signals from piezoelectric sensors or photodiode transimpedance stages |
| Settling Time | 550 ns to 0.01% - supports 16-bit+ data acquisition at >100 kSPS with minimal code-dependent error |
| Input Offset Voltage | ±100 µV max - reduces DC error in precision gain blocks and reference buffers without trimming |
| Gain-Bandwidth Product | 16 MHz - provides usable bandwidth up to ~1.6 MHz at G = 10, sufficient for anti-aliasing and reconstruction filters |
| Supply Voltage Range | ±4.5 V to ±18 V - accommodates industrial ±12 V, ±15 V, and wide-range test equipment rails |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, downhole, and military embedded systems requiring extended thermal reliability |
| Input Bias Current | ±5 pA max - preserves signal integrity in >1 GΩ source impedances (e.g., pH electrodes, MEMS capacitive sensors) |
Pinout & Package
OPA627SM is supplied in an 8-pin SOIC (D) package with standard JEDEC MS-012AC footprint. Pin 1, 5, and 8 are no-connect terminals; pins 2 and 3 serve as inverting and noninverting inputs respectively; pin 4 is negative supply (V–); pin 6 is output; pin 7 is positive supply (V+).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No internal connection | Must be left floating - no routing or grounding required; unused pins do not affect performance or EMI |
| 2 | Inverting input (–IN) | Primary feedback node for inverting configurations; high-impedance path sensitive to PCB leakage and guarding |
| 3 | Noninverting input (+IN) | Reference input for noninverting gain stages; requires symmetric layout to minimize CMRR degradation |
| 4 | Negative power supply (V–) | Connect directly to clean ground plane or negative rail; decoupling capacitor (0.1 µF) required within 5 mm |
| 6 | Output (OUT) | Capable of ±30 mA drive into 1 kΩ load; output impedance <55 Ω at 1 MHz limits high-frequency loading effects |
| 7 | Positive power supply (V+) | Connect to regulated positive rail; separate decoupling from V– improves PSRR above 100 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Guaranteed stable in G = 1 configurations without external compensation - eliminates risk of oscillation in buffer and follower circuits |
| Laser-trimmed input stage | Enables ±100 µV VOS and ±0.8 µV/°C drift over full temperature range - reduces calibration overhead in production test systems |
| Ultra-low input bias current | ±5 pA max at 25°C and ±50 pA over –55°C to +125°C - preserves signal fidelity in high-Z sensor interfaces and electrometer-grade circuits |
| High common-mode rejection | 106 dB min CMRR at DC, maintaining >80 dB up to 100 kHz - rejects interference in noisy industrial environments |
| Low THD+N | 0.00003% at 1 kHz, G = 1 - meets audio-grade and medical imaging spectral purity requirements |
Applications
| Precision Instrumentation | Ultrasound Front-End |
|---|---|
Use Scenario: High-accuracy voltage measurement in automated test equipment with 24-bit ADCs and programmable gain. IC Role / Device Role / Timing Role: Precision DC-coupled gain block and reference buffer before digitization. Use Value: ±100 µV VOS and 0.8 µV/°C drift minimize system-level calibration frequency and improve long-term measurement repeatability. | Use Scenario: Low-noise amplification of weak echo signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: First-stage preamplifier in analog beamformer channel. Use Value: 4.5 nV/√Hz noise density and 550 ns settling enable detection of sub-microvolt echoes with minimal added noise floor. |
| DAC Output Amplifier | Active Filter |
Use Scenario: Reconstruction filter driver for 16-bit+ high-speed DACs in waveform generators and arbitrary function generators. IC Role / Device Role / Timing Role: Unity-gain output buffer isolating DAC core from load capacitance and cable impedance. Use Value: Unity-gain stability and 550 ns settling ensure monotonic step response and prevent overshoot in multi-step transitions. | Use Scenario: Second-order Sallen-Key or MFB low-pass filter in spectrum analyzers and RF receiver IF chains. IC Role / Device Role / Timing Role: Active integrator and gain element in continuous-time analog filtering. Use Value: 16 MHz GBW and low distortion support filter cutoffs up to 1.6 MHz with <0.0001% THD+N at 1 kHz. |
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 |
|---|---|---|---|
| OPA627BM | Same electrical specs and package; rated for –25°C to +85°C industrial range instead of –55°C to +125°C | Suitable for commercial/industrial control systems but not aerospace or downhole deployments | Select OPA627BM when extended temperature qualification is unnecessary and cost optimization is prioritized |
| OPA637SM | Higher 80 MHz GBW and 450 ns settling, but only stable for noise gain ≥5 - not unity-gain compatible | Preferred in fixed-gain ≥5 signal paths (e.g., photodiode transimpedance with RF = 100 kΩ), unsuitable as direct buffer replacement | Choose OPA637SM only when circuit topology guarantees minimum noise gain of 5 and higher bandwidth is critical |
Compared with OPA627BM, the OPA627SM offers extended temperature qualification and identical noise/settling performance; compared with OPA637SM, it trades bandwidth for guaranteed unity-gain stability - making it the sole choice for buffer, follower, and variable-gain configurations where unconditional stability is mandatory.
Availability
OPA627SM is available at Aetrix Electronics and suitable for precision instrumentation, ultrasound imaging systems, and high-resolution DAC output stages requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for OPA627SM 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 OPA627SM belongs to TI's OPA6x7 precision JFET op amp family, engineered specifically for applications demanding ultra-low noise, femtoampere input bias, and guaranteed unity-gain stability in harsh thermal environments.
FAQ
What is the maximum operating temperature range for the OPA627SM?
The OPA627SM is specified for operation from –55°C to +125°C, making it suitable for aerospace, defense, and oilfield applications where extreme thermal environments are encountered. This extended range is confirmed in Section 5.3 of the SBOS165C datasheet under Recommended Operating Conditions for the SM grade.
Is the OPA627SM unity-gain stable, and how is this verified?
Yes, the OPA627SM is explicitly unity-gain stable, as stated in the device description, features list, and functional block diagram sections of the SBOS165C datasheet. Stability is guaranteed across its full operating temperature and supply voltage range, with no external compensation required in G = 1 configurations.
What package type is used for the OPA627SM, and are there alternatives?
The OPA627SM is supplied exclusively in the 8-pin SOIC (D) package per TI's orderable information table. While the OPA627 family also offers TO-99 (LMC) variants, the SM grade is only available in SOIC-8 - no TO-99 version of OPA627SM exists per TI's packaging documentation.
How does the OPA627SM compare to the OPA627BM in noise performance?
The OPA627SM and OPA627BM share identical noise specifications: both deliver 4.5 nV/√Hz at 10 kHz and 0.6–1.6 µVPP integrated noise (0.1 Hz to 10 Hz). The difference lies solely in temperature rating - BM is industrial grade (–25°C to +85°C), while SM extends to –55°C to +125°C without degrading noise.
Can the OPA627SM be used in single-supply applications?
Yes, the OPA627SM supports single-supply operation up to 36 V (Section 5.1 Absolute Maximum Ratings), with common-mode input range extending to within 0.5 V of the rails. For proper linear operation, ensure input and output signals remain within the specified VCM and VO limits per Section 5.7 Electrical Characteristics.
OPA627SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Difet®
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 55V/µs
- Gain Bandwidth Product:
- 16 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
OPA627SM FAQ
1.How can I place an order for OPA627SM through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA627SM 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 OPA627SM reliable?
The price and inventory of OPA627SM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA627SM is usually 5 days.
3.What payment methods are accepted for OPA627SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA627SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA627SM?
OPA627SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA627SM 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 OPA627SM?
For technical support, including OPA627SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA627SM requirements.
6.How does Aetrix verify that OPA627SM is sourced from the original manufacturer or authorized distributors?
All OPA627SM 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 OPA627SM meets industry standards.
7.What is the process for return or replacement of OPA627SM?
All OPA627SM units undergo pre-shipment inspection (PSI). If there is an issue with OPA627SM, 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 OPA627SM part is unused and in its original packaging.
Return procedure for OPA627SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA627SM Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
