CROSS-REFERENCE ALTERNATIVE
COS4333SRC is a Chinese-manufactured Zero-Drift Precision Op-Amp from COSINE (科山芯创) that cross-references to OPA4333 (TI), and also to OPA4330.
It is a SOP8 device positioned as a domestic-supply option against the imported: shorter lead times, no allocation risk and a stable price for volume production. Because the parts are not pin-identical in every case, the engineering checklist below lists what to verify before you commit.
Cross-reference · Before you substitute · Related parts · FAQ · Request a quote
COS4333SRC — Zero-Drift Precision Op-Amp, alternative to OPA4333
COS4333SRC is supplied by Shenzhen Jingteng Electronics (JTDZ Tech) as a domestically sourced option for OPA4333 (TI), OPA4330. Imported parts in this class are frequently subject to allocation, long lead times and steep price swings. A Chinese-manufactured equivalent removes that exposure: the parts are production-validated in industrial, consumer and automotive designs and ship from stock on a short lead time.
Cross-reference chart — which imported parts does COS4333SRC replace?
Every imported part number that COS4333SRC is published as a cross-reference alternative to, per the COSINE (科山芯创) 2025 selection table:
| imported part number | brand | Replaced by (this part) |
|---|---|---|
| OPA4333 | TI | COS4333SRC |
| OPA4330 | — | COS4333SRC |
Cross-reference means functional equivalence in the same application role. It is not a blanket claim of pin-for-pin identity — confirm package, pinout and the parameters listed below before you release a design change.
Device information
| Part number | COS4333SRC |
| Manufacturer | COSINE (科山芯创) |
| Device class | Zero-Drift Precision Op-Amp |
| Package | SOP8 |
| Pin Count | 8 |
| Verified and new, traceable date code | |
| Stock | In stock, ships within 24 hours |
| Description | Zero-Drift Precision Op-Amp, SOP8 package. |
What to verify before substituting COS4333SRC
These are the parameters that decide whether a cross-reference works in practice. Run through the list against the datasheet before releasing a change:
- Input offset voltage and offset drift over temperature — the reason to choose this class at all
- Input bias current: zero-drift (chopper/auto-zero) parts often have higher bias current than the bipolar
- Noise density and the chopping artefacts in the band you care about, not just the datasheet 1 kHz figure
- Bandwidth and settling behaviour — chopping can produce intermodulation at the chopper frequency
- Output swing and drive capability
- Supply range and single- vs dual-supply operation
- Package and pinout, including any required decoupling pins
Typical applications
- Precision strain-gauge and load-cell conditioning
- Thermocouple and low-level DC amplification
- Medical instrumentation and portable diagnostics
- Current sensing and battery monitoring
- High-resolution data acquisition
- Photodiode and low-level transducer front ends
Related COSINE parts and alternatives
Other {BRAND} parts in the same device family or the same device class — useful when you are cross-referencing a whole BOM rather than a single line item.
| COSINE part | Package | Cross-references to | Relation |
|---|---|---|---|
| COS4333SRA | SOP8 | OPA4333, OPA4330 | Same series |
| COS4333SRB | SOP8 | OPA4333, OPA4330 | Same series |
| COS4333TRA | TSSOP14 | OPA4333, OPA4330 | Same series |
| COS4333TRB | TSSOP14 | OPA4333, OPA4330 | Same series |
| COS1333TRA | SOT23-5 | OPA333AIDBVR, OPAx317, OPA330 | Zero-Drift Precision Op-Amp |
| COS1333TR(B) | SOT23-5 | OPA333AIDBVR, OPAx317, OPA330 | Zero-Drift Precision Op-Amp |
| COS1333TRC | SOT23-5 | OPA333AIDBVR, OPAx317, OPA330 | Zero-Drift Precision Op-Amp |
| COS2333SRA | SOP8 | OPA2333AIDR, OPAx317, OPA2330 | Zero-Drift Precision Op-Amp |
| COS2333SRB | SOP8 | OPA2333AIDR, OPAx317, OPA2330 | Zero-Drift Precision Op-Amp |
| COS2333SRC | SOP8 | OPA2333AIDR, OPAx317 | Zero-Drift Precision Op-Amp |
| COS2333MRA | MSOP8 | OPA2333AIDR, OPAx317 | Zero-Drift Precision Op-Amp |
| COS2333MRB | MSOP8 | OPA2333AIDR, OPAx317 | Zero-Drift Precision Op-Amp |
Frequently asked questions
What does COS4333SRC replace?
According to the COSINE (科山芯创) 2025 cross-reference table, COS4333SRC is published as an alternative to OPA4333 (TI), OPA4330.
Is COS4333SRC a pin-to-pin drop-in for OPA4333?
Cross-reference means the part is intended for the same application role; it is not a blanket guarantee of pin-for-pin identity. Check package, pinout and the parameters listed under “What to verify” above, or send us your BOM and we will confirm before you commit.
Can you supply the OPA4333 as well?
Yes. We source both the imported and the Chinese-manufactured alternative, so you can compare price, lead time and availability on the same quote.
What is the MOQ and lead time for COS4333SRC?
MOQ 1 pc. COS4333SRC is held in stock and ships within 24 hours; quotes are returned within 2 business hours. We ship worldwide including India, Vietnam and the Middle East.
Request a quote for COS4333SRC
Send us the part number and target quantity — we reply within 2 business hours with price, stock and a cross-reference confirmation.
Request a quote More Amplifiers / Data Conversion
Genuine original parts guaranteed — traceable lot & date code, X-ray / visual inspection and third-party test supported before shipment.
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