COSINE Tier-1 distributor Jarwey｜5V zero-drift COS8552SR vs 36V precision op amp COS4177SR
Jarwey is a Tier-1 distributor for COSINE—selection support, datasheets, samples and small lots, and lead-time coordination.
Sensor conditioning and supply monitoring get dropped onto one op amp far too often. The supply on the amplifier pins decides the part: if the signal and the rails stay inside 5.5 V and the error is drift on a slow DC sensor, start with the 5 V zero-drift op amp COS8552SR. If the amplifier must sit on a 12/24 V field rail or up to 36 V for rail monitoring or motor feedback, start with the 36 V precision op amp COS4177SR.
The 5 V zero-drift bandwidth/Iq ladder is already in the bandwidth ladder note. The 1/2/4-channel 2 MHz matrix is in the 36 V family note. BMS and servo current-sense layout points stay in the COS4177SR application note. This page does not reprint those tables.
Figures follow the 2025 catalog. Confirm the exact datasheet before layout. Datasheets: contact Jarwey.
Rail first, part number second
| Decision | COS8552SR · 5 V zero-drift | COS4177SR · 36 V precision |
|---|---|---|
| Amplifier supply | Catalog 1.8–5.5 V. 3.3/5 V sensor boards and battery hardware. | Catalog 4.5–36 V. 12/24 V field rails and industrial ±15 V style supplies. |
| Job | Low-offset sensor conditioning: pressure, temperature, weigh scales, other slow DC. | Supply monitoring, industrial control, motor feedback once common-mode leaves 5 V. |
| Error budget | Catalog Vos max 10 µV, drift 0.005 µV/°C. Use this when temperature drift dominates. | Catalog Vos max 50 µV, drift 0.2 µV/°C. Close the voltage rating first, then check this error. |
| Bandwidth | 1.5 MHz GBP, about 55 µA/channel. Fine from DC to a few hertz. | 2.0 MHz GBP, 0.7 V/µs. If settling is still short, move to the 10/25 MHz precision families—do not stretch the 5 V zero-drift part. |
| Channels / package | Dual, SOP-8. Single-channel option: COS1333TR (SOT-23-5). | Quad, SOP-14. Dual: COS2177SR. Single: COS1177SR. Packages are not interchangeable on the footprint. |
| Do not force it | Do not feed a 24 V bus into a 5.5 V input range. | Do not spend a 36 V precision amp on a microvolt battery-sensor drift budget. |
| Product page | 865 · COS8552SR | 866 · COS4177SR |
AD8552 and OP4177 / OPA4277 are the catalog reference grades for evaluation. Matching a reference grade is not a drop-in release; bench the datasheet limits before production.
Catalog snapshot of the two parts
| Part | Type | Ch | Supply | GBP | Vos max | Package | Page |
|---|---|---|---|---|---|---|---|
| COS8552SR | Zero-drift op amp | 2 | 1.8–5.5 V | 1.5 MHz | 10 µV | SOP-8 | 865 |
| COS4177SR | Precision op amp | 4 | 4.5–36 V | 2.0 MHz | 50 µV | SOP-14 | 866 |
The COS4177 family catalog also lists 8 nV/√Hz at 1 kHz and 0.33 mA quiescent current. Zero-drift wins on low-frequency offset and tempco; that 1 kHz density figure is not a substitute comparison. Auto-zero outputs carry chopper ripple. If a supply-monitor node feeds an ADC, check ripple against the sample rate in the datasheet.
Checklist before you pick a rail
- Pins, not the MCU rail: measure V+ / V− on the amplifier. COS8552SR stops at 5.5 V. COS4177SR spans 4.5 V to 36 V.
- Common-mode window: the sensor output, or the divided monitor node, has to sit inside the input range. A 24 V bus does not go straight into a 5 V zero-drift input.
- Which error matters: drift on temperature, pressure, or weight → zero-drift. A 50 µV / 0.2 µV/°C budget plus high-voltage swing → 36 V precision.
- Settling: DC to a few hertz fits 1.5 MHz. Motor feedback that needs faster settling should confirm 2 MHz before jumping to the 10/25 MHz precision families.
- Ripple into the ADC: on a zero-drift supply monitor, check whether chopper ripple lands in the sampling bandwidth.
- Channel count and package: SOP-8 and SOP-14 do not share a footprint. 5 V single: COS1333TR. 36 V dual: COS2177SR. 36 V single: COS1177SR.
- Datasheet and samples: contact Jarwey for the datasheet. Measure drift, supply step, and ADC codes on the board before the BOM is frozen.
Datasheet and quote
Send the rail voltages, sensor or monitor bandwidth, and error budget to Jarwey for a shortlist, samples, and lead time. Jarwey · COSINE Tier-1 distributor · kerry.w@jarwey.cn · Contact.
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