# CJ358

**Changjing** · Operational Amplifier · SOP-8

CJ358 from Changjing, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUTPUT 1 | output | Output of op-amp channel 1. Output swings from 0V to VCC-1.5V; source current 20-40mA, sink current 10-20mA at VCC=15V, VO=2V. |
| 2 | INPUT 1- | input | Inverting input of op-amp channel 1. Input bias current ~20nA (typ), input offset current ~5nA. Input voltage range includes ground; do not drive more than 0.3V below GND. |
| 3 | INPUT 1+ | input | Non-inverting input of op-amp channel 1. Input common-mode range 0V to VCC-1.5V; can tolerate up to +32V independent of VCC. |
| 4 | GND | power_in | Ground / negative supply. For single-supply operation tie to 0V; for dual supplies connect to V-. |
| 5 | INPUT 2+ | input | Non-inverting input of op-amp channel 2. Input common-mode range 0V to VCC-1.5V; can tolerate up to +32V independent of VCC. |
| 6 | INPUT 2- | input | Inverting input of op-amp channel 2. Input bias current ~20nA (typ), input offset current ~5nA. Input voltage range includes ground; do not drive more than 0.3V below GND. |
| 7 | OUTPUT 2 | output | Output of op-amp channel 2. Output swings from 0V to VCC-1.5V; source current 20-40mA, sink current 10-20mA at VCC=15V, VO=2V. |
| 8 | VCC | power_in | Positive supply voltage. Single-supply range 3V to 32V (30V recommended max); dual-supply range ±1.5V to ±16V. Supply current 0.5mA (typ) at VCC=5V, 1mA (typ) at VCC=30V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOP-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply Voltage | VCC |  |  | 32 | V |  | 2 |
| Differential Input Voltage | VID |  |  | 32 | V |  | 2 |
| Input Voltage | VIC | -0.3 |  | 32 | V |  | 2 |
| Input Current | IIN |  |  | 50 | mA | VIN<-0.3V (Note 2) | 2 |
| Power Dissipation | PD |  |  | 550 | mW | TA=25°C | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 2 |
| Lead Temperature | TLEAD |  |  | 260 | °C | Soldering, 10 seconds | 2 |
| Supply Voltage | VCC | 3 |  |  | V |  | 2 |
| Ambient Operating Temperature Range | TA | 0 |  | 70 | °C |  | 2 |
| Input Offset Voltage | VIO |  | 2 | 7 | mV | VO=1.4V, RS=0Ω, VCC=5V to 30V | 3 |
| Input Bias Current | IBIAS |  | 20 | 250 | nA | IIN+ or IIN-, VCM=0V | 3 |
| Input Offset Current | IIO |  | 5 | 50 | nA | IIN+-IIN-, VCM=0V | 3 |
| Input Common Mode Voltage Range | VIR | 0 |  |  | V | VCC=30V | 3 |
| Supply Current | ICC |  | 1 | 2 | mA | RL=∞, over full temperature range on all OP Amps, VCC=30V | 3 |
| Supply Current | ICC |  | 0.5 | 1.2 | mA | RL=∞, over full temperature range on all OP Amps, VCC=5V | 3 |
| Large Signal Voltage Gain | GV | 88 | 100 |  | dB | VCC=15V, RL≥2kΩ, VO=1V to 11V | 3 |
| Common Mode Rejection Ratio | CMRR | 65 | 85 |  | dB | VCM=0V to (VCC-1.5)V | 3 |
| Power Supply Rejection Ratio | PSRR | 65 | 90 |  | dB | VCC=5V to 30V | 3 |
| Output Current Source | ISOURCE | 20 | 40 |  | mA | VIN+=1V, VIN-=0V, VCC=15V, VO=2V | 3 |
| Output Current Sink | ISINK | 10 | 20 |  | mA | VIN+=0V, VIN-=1V, VCC=15V, VO=2V | 3 |
| Output Current Sink (small output) | ISINK | 12 | 50 |  | µA | VIN+=0V, VIN-=1V, VCC=15V, VO=0.2V | 3 |
| Output Short Circuit to Ground | ISC | 40 | 60 |  | mA | VCC=15V | 3 |
| Output Voltage Swing High | VOH | 26 |  |  | V | VCC=30V, RL=2kΩ | 3 |
| Output Voltage Swing High | VOH | 27 | 28 |  | V | VCC=30V, RL=10kΩ | 3 |
| Output Voltage Swing Low | VOL |  | 5 | 20 | mV | VCC=5V, RL=10kΩ | 3 |
| Channel Separation | CS |  | -120 |  | dB | f=1kHz to 20kHz | 3 |
| Thermal Resistance (Junction to Case) | θJC |  | 98.84 |  | °C/W |  | 3 |

## CAD (KiCad official)

- Symbol: `CJ358`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cj358-etched.step` / `cj358-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj358.step` / `cj358.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Changjing datasheet](docs/cj358-datasheet.pdf) (6 pp, sha256 `176af1babad100e2`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cj358-datasheet.pdf)