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Texas Instruments OPA606KM
- Part No.:
- OPA606KM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
OPA606KM.pdf
- Description:
- IC OPAMP GP 12.5MHZ SGL TO-99-8
- Quantity:
- Payment:
- Shipping:
Inventory:6,377
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Product details
Overview
OPA606KM from Texas Instruments (formerly Burr-Brown) is a wide-bandwidth dielectrically isolated FET (Difet®) operational amplifier optimized for precision, low-noise, high-speed signal conditioning in test equipment and data acquisition systems. It delivers 13 MHz gain-bandwidth, 35 V/µs slew rate, 10 pA max input bias current at +25°C, 500 µV max input offset voltage, and 0.0035% THD at 10 kHz - enabling accurate amplification of fast, low-level analog signals.
For engineers reviewing the OPA606KM datasheet, OPA606KM pinout, OPA606KM application, or OPA606KM equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for high-impedance, low-distortion amplifier selection.
Technical Context
The OPA606KM uses dielectric isolation to achieve ultra-low input bias current (<15 pA over full temperature range) while maintaining FET-input stability and laser-trimmed thin-film resistors for precise offset voltage control (±750 µV max). Its internal unity-gain compensation ensures stable operation without external compensation networks across all gains.
It features dual offset trim pins (Pins 1 and 5), TO-99 metal-can package with case connected to +VCC, and guaranteed performance from 0°C to +70°C ambient - with extended operating range from –55°C to +125°C. Input impedance exceeds 1013 Ω || 1 pF differential and 1014 Ω || 3 pF common-mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 13 MHz typ - supports closed-loop bandwidth >12 MHz at unity gain for high-fidelity signal reproduction. |
| Slew Rate | 35 V/µs typ - enables clean 20 Vp-p output up to ~550 kHz full-power response without slewing distortion. |
| Input Bias Current | 10 pA max at +25°C - preserves signal integrity in high-impedance sensor interfaces (e.g., photodiode, piezoelectric). |
| Input Offset Voltage | 500 µV max - reduces DC error in precision gain stages without mandatory external trimming. |
| Total Harmonic Distortion | 0.0035% typ at 10 kHz - meets stringent audio and instrumentation linearity requirements. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - balances low-noise performance with ultra-low bias current for wideband applications. |
| Common-Mode Rejection | 95 dB typ - rejects interference in single-ended inputs referenced to noisy system grounds. |
Pinout & Package
OPA606KM is housed in an 8-pin TO-99 metal can package (Package Number 001), with the case electrically connected to +VCC. This shielding enhances EMI immunity and stabilizes high-frequency performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Trim | Connects to one end of external 100 kΩ potentiometer for fine offset adjustment; affects drift by ~0.5 µV/°C per mV trimmed. |
| 2 | Inverting Input (–In) | High-impedance FET input node; requires guarding to prevent leakage currents exceeding 10 pA. |
| 3 | Noninverting Input (+In) | High-impedance FET input node; symmetric layout with Pin 2 minimizes thermal EMF-induced offset. |
| 4 | –VCC | Negative supply terminal; must be bypassed with ≥0.1 µF ceramic capacitor near pin for stability. |
| 5 | Offset Trim | Connects to other end of same external trim potentiometer as Pin 1; forms balanced nulling network. |
| 6 | Output | Capable of ±12 V output swing into 2 kΩ load; stable with ≥1000 pF capacitive loads at unity gain. |
| 7 | +VCC | Positive supply terminal; case is internally tied to this pin, requiring mechanical grounding via heatsink or chassis. |
| 8 | No Connection (NC) | Unused pin; must remain unconnected to avoid parasitic coupling or mechanical stress on die bond wires. |
Key Features
| Feature | Design Value |
|---|---|
| Difet® Dielectric Isolation | Enables <15 pA input bias current over –55°C to +125°C, critical for electrometer-grade sensor front-ends. |
| Laser-Trimmed Thin-Film Resistors | Reduces initial offset to ±750 µV max and improves long-term drift stability vs. polysilicon alternatives. |
| Unity-Gain Stable Internal Compensation | Eliminates need for external compensation components, simplifying PCB layout for bandwidths up to 13 MHz. |
| TO-99 Metal-Can Shielding | Provides inherent EMI/RFI suppression and thermal conduction path - essential for low-noise benchtop instruments. |
| Guaranteed Full-Temp Spec Compliance | Electrical parameters validated across 0°C to +70°C ambient, with extended operation to –55°C/+125°C. |
Applications
| Optoelectronics Signal Conditioning | Data Acquisition Front-End |
|---|---|
|
Use Scenario: Amplifying low-current output from high-speed photodiodes in fiber-optic receivers or laser rangefinders. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 MΩ feedback resistor, converting photocurrent to voltage while preserving bandwidth and minimizing noise. Use Value: 10 pA max bias current prevents signal loss; 13 MHz GBW supports >1 MHz optical modulation bandwidths. |
Use Scenario: Buffering and gain-setting stage in 16-bit+ SAR ADC driver circuits for industrial process monitoring. IC Role / Device Role / Timing Role: High-Z input buffer driving ADC sample-and-hold input with minimal settling time and charge injection. Use Value: 1.0 µs 0.1% settling time and 0.0035% THD ensure full-resolution accuracy without post-conversion correction. |
| Test Equipment Amplifier | Low-Distortion Audio Preamp |
|
Use Scenario: Output stage in programmable gain instrumentation amplifiers used in automated test systems (ATE). IC Role / Device Role / Timing Role: Precision gain block with adjustable offset and low thermal drift for calibrated voltage sourcing. Use Value: Laser-trimmed offset and ±5 µV/°C drift enable stable calibration over temperature without recalibration cycles. |
Use Scenario: RIAA-equalized phono preamplifier stage for moving-magnet cartridges in high-fidelity audio systems. IC Role / Device Role / Timing Role: Low-noise, low-THD gain stage with precise 40 dB mid-band gain and controlled frequency response. Use Value: 14 nV/√Hz input noise and 0.0035% THD at 10 kHz preserve dynamic range and harmonic integrity in analog playback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-bias-current op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA656U | Higher GBW (230 MHz), lower noise (4.8 nV/√Hz), but higher bias current (1.5 pA typ) and no offset trim pins. | Better for RF/IF gain blocks; unsuitable where manual offset nulling or ultra-low bias (<15 pA) is required. | Select OPA656U only if bandwidth >50 MHz is needed and bias current >1 pA is acceptable. |
| ADA4817-1ARZ | Lower input capacitance (0.4 pF), higher slew rate (125 V/µs), but bias current (2.5 pA typ) and no TO-99 package option. | Preferred for ultra-fast pulse amplification; lacks metal-can EMI shielding and trim capability for precision DC-coupled designs. | Choose ADA4817-1ARZ when speed dominates and board-level guarding replaces TO-99 shielding. |
Compared with OPA606KM, OPA656U trades ultra-low bias current and offset trim for extreme bandwidth, while ADA4817-1ARZ sacrifices package-level shielding and manual calibration for higher slew rate - making OPA606KM uniquely suited for metrology-grade, thermally stable, low-leakage analog front-ends.
Availability
OPA606KM is available at Aetrix Electronics and suitable for optoelectronics signal conditioning, data acquisition front-end design, and test equipment amplifier applications requiring stable component supply, long-lifecycle support, and traceable sourcing of legacy precision analog ICs.
Supply support for OPA606KM 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 (TI) acquired Burr-Brown in 2000 and maintains its legacy precision analog portfolio. TI is a global semiconductor leader focused on analog, embedded processing, and connectivity technologies.
The OPA606KM belongs to TI's Difet® operational amplifier product line, engineered specifically for applications demanding simultaneous ultra-low input bias current, wide bandwidth, and low distortion - such as scientific instrumentation, photonics, and high-resolution data acquisition.
FAQ
What is the maximum operating temperature range for the OPA606KM?
The OPA606KM is specified for 0°C to +70°C ambient temperature operation, with extended functionality validated from –55°C to +125°C. Its TO-99 package provides robust thermal conduction, and θJA is rated at 200°C/W. For continuous operation above +70°C, derating per power dissipation limits and junction temperature (TJ ≤ +175°C) must be observed. The OPA606KM maintains key parameters like bias current and offset voltage within datasheet limits across its full operating range.
Does the OPA606KM require external compensation for unity-gain stability?
No, the OPA606KM is internally compensated for unity-gain stability and does not require external compensation components. Its design allows stable operation with closed-loop gains ≥1 without risk of oscillation, even with capacitive loads up to 1000 pF. This simplifies circuit implementation in high-speed buffer and gain-of-one configurations - a key advantage over many uncompensated FET-input op-amps that mandate careful external compensation network design.
How is the case of the OPA606KM TO-99 package connected electrically?
The metal case of the OPA606KM TO-99 package is internally connected to the +VCC pin (Pin 7). This configuration provides inherent electrostatic shielding and a low-inductance thermal path. When mounting, the case must be electrically tied to the positive supply rail - either directly or through a low-impedance heatsink - and never left floating or grounded independently, as doing so may disrupt bias conditions or cause instability. Proper mechanical grounding also enhances EMI rejection in sensitive measurement environments.
Can the OPA606KM replace the LF156 in existing designs?
Yes, the OPA606KM is a direct functional upgrade to the LF156, offering wider bandwidth (13 MHz vs. 5 MHz), lower bias current (10 pA vs. 30 pA), improved offset voltage (±750 µV vs. ±5 mV), and laser-trimmed performance. Pin compatibility is maintained in the TO-99 footprint, and the offset trim configuration matches LF156. However, due to higher slew rate and bandwidth, layout practices - especially power supply bypassing and input guarding - must meet OPA606KM's stricter high-frequency requirements to avoid instability or noise coupling.
What is the purpose of Pins 1 and 5 on the OPA606KM?
Pins 1 and 5 on the OPA606KM are dedicated offset voltage trim terminals. They connect to opposite ends of an external 100 kΩ potentiometer (recommended), allowing manual nulling of residual input offset voltage after laser trimming. Adjusting this network changes offset by up to ±50 mV typical, but introduces ~0.5 µV/°C additional drift per millivolt of applied trim voltage. Leaving these pins unconnected is standard practice for most applications, as the OPA606KM's factory-trimmed offset (±750 µV max) typically eliminates the need for field adjustment.
OPA606KM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Difet®
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 33V/µs
- Gain Bandwidth Product:
- 12.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 pA
- Voltage - Input Offset:
- 180 µV
- Current - Supply:
- 6.5mA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
OPA606KM FAQ
1.How can I place an order for OPA606KM through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA606KM 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 OPA606KM reliable?
The price and inventory of OPA606KM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA606KM is usually 5 days.
3.What payment methods are accepted for OPA606KM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA606KM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA606KM?
OPA606KM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA606KM 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 OPA606KM?
For technical support, including OPA606KM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA606KM requirements.
6.How does Aetrix verify that OPA606KM is sourced from the original manufacturer or authorized distributors?
All OPA606KM 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 OPA606KM meets industry standards.
7.What is the process for return or replacement of OPA606KM?
All OPA606KM units undergo pre-shipment inspection (PSI). If there is an issue with OPA606KM, 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 OPA606KM part is unused and in its original packaging.
Return procedure for OPA606KM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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