COSINE Tier-1 distributor Jarwey｜40V RRIO COS2170SRA vs 36V precision COS1177SR
Jarwey is a COSINE Tier-1 distributor and can help with selection, datasheets, samples, small lots, and lead time.
On a sensor or ADC front end, split the choice before comparing bandwidth ladders: does the input have to include the positive supply rail, or is the error budget a 50 µV offset? Rail-inclusive inputs start at the 40 V RRIO dual COS2170SRA. A 50 µV / 0.2 µV/°C budget starts at the 36 V precision single COS1177SR.
The earlier supply-rail note (5 V zero-drift versus 36 V precision) stays on COS8552SR and COS4177SR. This page does not reopen it. Bandwidth steps inside the 40 V RRIO class are in the 40 V RRIO family note. Channel count for the 2 MHz precision class is in the 36 V 2 MHz family note.
These product pages ask you to request the datasheet. Contact Jarwey for it.
Rail-inclusive input or 50 µV offset
| Decision | Part | What the product page states | Do not copy across | Package | Page |
|---|---|---|---|---|---|
| Signal reaches the rail | COS2170SRA | 40 V RRIO, GBP 1.5 MHz | No Vos, drift, slew, or Iq on the function line | SOP-8 | 922 |
| Still RRIO, GBP 5 MHz | COS2171SRA | 40 V RRIO, GBP 5 MHz | Higher GBP is not a 50 µV spec | SOP-8 | 923 |
| Still RRIO, GBP 10 MHz | COS2172SRA | 40 V RRIO, GBP 10 MHz | Offset still absent from the function line | SOP-8 | 924 |
| One channel, small package | COS171TR | 40 V RRIO, GBP 5 MHz | Same GBP class as COS2171SRA, different package | SOT-23-5 | 925 |
| 50 µV error budget | COS1177SR | 36 V precision, GBP 2 MHz, Vos max 50 µV, drift 0.2 µV/°C. Supply 4.5–36 V (±2.25–±18 V), slew 0.7 V/µs, noise 8 nV/√Hz at 1 kHz, Iq 0.33 mA | The page does not say rail-to-rail input | SOP-8 | 1013 |
| Dual, same precision class | COS2177SR | Dual 36 V precision, GBP 2 MHz, Vos max 50 µV, drift 0.2 µV/°C; page says the metrics match COS1177 | Slew, noise, Iq, and supply are not repeated on this page | SOP-8 | 1014 |
OPA2170 / TLV9302 and OP1177 are cross-check anchors only. Confirm pinout, common-mode range, and drift on the datasheet and on the bench before release.
Selection checklist
- Rail: if the peak sits near the positive supply, open COS2170SRA, COS2171SRA, COS2172SRA, or COS171TR before treating COS1177SR as RRIO.
- 50 µV: Vos max 50 µV and 0.2 µV/°C drift are written on COS1177SR and COS2177SR. They are not on the 40 V RRIO function lines.
- Supply: COS1177SR lists 4.5–36 V (±2.25–±18 V). The 40 V pages say “40 V RRIO”; confirm the continuous rating on the datasheet from Jarwey.
- GBP: stay on COS2170SRA when 1.5 MHz is enough and the input must include the rail. Move to 5 MHz (COS2171SRA or single COS171TR) or 10 MHz (COS2172SRA) only inside the RRIO class. GBP does not add a 50 µV limit.
- Channels: one precision channel is COS1177SR; two channels with the same stated offset are COS2177SR. Quad COS4177SR stays in the existing channel note.
- Slew, noise, Iq: 0.7 V/µs, 8 nV/√Hz at 1 kHz, and 0.33 mA belong to the COS1177SR description. COS2177SR only says the metrics match; ask Jarwey to confirm the datasheet line by line.
- Datasheet and samples: request the datasheet, samples, and lead time from Jarwey. Send the incumbent part number, the rail, and the offset you can accept.
Datasheet and inquiry
Jarwey · COSINE Tier-1 distributor · kerry.w@jarwey.cn · Contact.
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