COS129U

Based on official COSINE (Coresine) datasheets and authorized distributor product pages:

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**Description**
- 36V precision instrumentation amplifier
- High-precision, low-noise instrumentation amplifier designed for high-accuracy measurement and test equipment
- Features low offset voltage, low drift, and low input bias current
- Housed in SOP-8 surface mount package
- **Product Status:** Obsolete / End of Life (EOL) – not recommended for new designs

**Features**
- Very low offset voltage: 50µV max
- Ultra-low offset drift: 0.2µV/°C
- Low input bias current: 1nA typ. / 2nA max
- Low input offset current: 10nA
- Low noise: 8nV/√Hz @ 1kHz
- High CMRR: 125dB
- High PSRR: 120dB
- Gain bandwidth product: 1.5MHz
- Slew rate: 1V/µs
- Wide supply range:
- Single supply: 4.5V to 36V
- Dual supply: ±2.25V to ±18V
- Low quiescent current: 1.0mA
- Output current: 10mA
- Gain set with single external resistor (1 to 10,000)
- Operating temperature range: –40°C to +125°C
- RoHS compliant and Pb-free

**Key Specifications** (Typical @ 25°C)
- Number of Channels: Single
- Supply Voltage (Single): 4.5V to 36V
- Supply Voltage (Dual): ±2.25V to ±18V
- Gain Bandwidth Product (GBW): 1.5MHz
- Slew Rate (SR): 1V/µs
- Input Offset Voltage (Vos): 50µV max
- Input Offset Voltage Drift (Vos TC): 0.2µV/°C
- Input Bias Current (Ib): 1nA typ.
- Input Offset Current (Ios): 10nA
- Input Voltage Noise Density (en): 8nV/√Hz @ 1kHz
- Common Mode Rejection Ratio (CMRR): 125dB
- Power Supply Rejection Ratio (PSRR): 120dB
- Quiescent Current (Iq): 1.0mA
- Output Current: 10mA
- Operating Temperature: –40°C to +125°C
- Package / Case: SOP-8

**Alternative Part Numbers** (Reference only – please verify with manufacturer)
- COS129UA (SOP-8, active – same series)
- INA129 (Texas Instruments)
- AD620 (Analog Devices)

**Applications**
- Precision measurement and test equipment
- High-accuracy data acquisition systems
- Sensor signal conditioning
- Medical instrumentation
- Industrial process controls
- Strain gauge amplifiers
- Thermocouple amplifiers
- Bridge transducers

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> **Note:** All parameters are subject to the official COSINE (Coresine) COS129U datasheet. Specifications are typical values and may vary with operating conditions. **This product is obsolete** – not recommended for new designs. Please verify all specifications with the manufacturer's official documentation before use.