Specifications
| Type | Description |
|---|---|
| Part Number | INA233 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | DGS VSSOP-10, 3.00 mm x 4.90 mm |
| Component Type | Power_IC |
| Bus Voltage Sense Range | 0 to 36 V; Operating range |
| Supply Voltage Range | 2.7 to 5.5 V; Operating supply |
| Digital Interface Voltage Compatibility | 1.8 to 5.0 V; I2C, SMBus, PMBus-compatible interface |
| Gain Error | 0.1% max; High accuracy specification |
| Offset Voltage | 10 uV max; High accuracy specification |
| Normal Supply Current | 310 uA typ; Normal operation |
| Standby Supply Current | 2 uA typ; Low-power standby mode |
| Operating Temperature Range | -40 to 125 degC; Specified operating temperature |
| Programmable Addresses | 16; Address pins A0 and A1 |
| Supply Voltage Absolute Maximum | 6 V max; Absolute maximum ratings |
| Differential Analog Input Voltage Absolute Maximum | -40 to 40 V; IN+ minus IN-; pin voltage must remain within -0.3 V to 40 V |
| Analog Input Common-Mode Absolute Maximum | -0.3 to 40 V; IN+, IN- absolute maximum ratings |
| VBUS Pin Voltage Absolute Maximum | -0.3 to 40 V; Absolute maximum ratings |
| SDA/SCL Pin Voltage Absolute Maximum | GND - 0.3 to 6 V; Absolute maximum ratings |
| A0/A1 Pin Voltage Absolute Maximum | GND - 0.3 to 6 V; Absolute maximum ratings |
| Input Current Absolute Maximum | 5 mA max; Into any pin |
| Open-Drain Digital Output Current Absolute Maximum | 10 mA max; Absolute maximum ratings |
| Junction Temperature Absolute Maximum | 150 degC max; Absolute maximum ratings |
| Storage Temperature Range | -65 to 150 degC; Absolute maximum ratings |
| ESD Rating HBM | +/-2500 V; ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | +/-1000 V; JEDEC JESD22-C101 |
| Recommended Common-Mode Input Voltage | 0 to 36 V; Recommended operating conditions |
| Recommended Operating Supply Voltage | 2.7 to 5.5 V; Recommended operating conditions |
| Recommended Operating Free-Air Temperature | -40 to 125 degC; Recommended operating conditions |
| Junction-to-Ambient Thermal Resistance | 171.4 degC/W; DGS VSSOP-10 package |
| Junction-to-Case Top Thermal Resistance | 42.9 degC/W; DGS VSSOP-10 package |
| Junction-to-Board Thermal Resistance | 91.8 degC/W; DGS VSSOP-10 package |
| Junction-to-Top Characterization Parameter | 1.5 degC/W; DGS VSSOP-10 package |
| Junction-to-Board Characterization Parameter | 90.2 degC/W; DGS VSSOP-10 package |
| Shunt Voltage Input Range | -81.92 to 81.9175 mV; TA=25 degC, VS=3.3 V, VIN+=12 V, VSENSE=0 mV, VBUS=12 V unless otherwise noted |
| Bus Voltage Input Range | 0 to 36 V; ADC full-scale scaling is 40.96 V; do not apply more than 36 V |
| Common-Mode Rejection Ratio | 126 dB min, 140 dB typ; 0 V <= VIN+ <= 36 V |
| Shunt Offset Voltage | +/-2.5 uV typ, +/-10 uV max; Referred-to-input |
| Bus Offset Voltage | +/-1.25 mV typ, +/-7.5 mV max; Referred-to-input |
| Shunt Offset Voltage Drift | 0.02 uV/degC typ, 0.1 uV/degC max; -40 degC <= TA <= 125 degC |
| Bus Offset Voltage Drift | 10 uV/degC typ, 40 uV/degC max; -40 degC <= TA <= 125 degC |
| Shunt Power-Supply Rejection Ratio | 1 uV/V; 2.7 V <= VS <= 5.5 V, referred-to-input |
| Bus Power-Supply Rejection Ratio | 0.5 mV/V; Referred-to-input |
| Input Bias Current | 8 uA; IN+ and IN- pins |
| VBUS Input Impedance | 830 kOhm; VBUS input |
| Input Leakage Current | 0.1 uA typ, 0.5 uA max; IN+ plus IN-, power-down mode |
| ADC Native Resolution | 16 bits; DC accuracy |
| Shunt Voltage LSB Step Size | 2.5 uV; 1-LSB step size |
| Bus Voltage LSB Step Size | 1.25 mV; 1-LSB step size |
| Shunt Voltage Gain Error | 0.02% typ, 0.1% max; DC accuracy |
| Shunt Voltage Gain Error Drift | 5 ppm/degC typ, 25 ppm/degC max; -40 degC <= TA <= 125 degC |
| Bus Voltage Gain Error | 0.02% typ, 0.1% max; DC accuracy |
| Bus Voltage Gain Error Drift | 10 ppm/degC typ, 50 ppm/degC max; -40 degC <= TA <= 125 degC |
| Power Gain Error | 0.05% typ, 0.2% max; VBUS=12 V, VIN+ - VIN- = -80 mV to 80 mV |
| Power Gain Error Drift | 10 ppm/degC typ, 50 ppm/degC max; -40 degC <= TA <= 125 degC |
| Differential Nonlinearity | +/-0.1 LSB; DC accuracy |
| ADC Conversion Time CT bit 000 | 140 us typ, 154 us max |
| ADC Conversion Time CT bit 001 | 204 us typ, 224 us max |
| ADC Conversion Time CT bit 010 | 332 us typ, 365 us max |
| ADC Conversion Time CT bit 011 | 588 us typ, 646 us max |
| ADC Conversion Time CT bit 100 | 1.1 ms typ, 1.21 ms max |
| ADC Conversion Time CT bit 101 | 2.116 ms typ, 2.328 ms max |
| ADC Conversion Time CT bit 110 | 4.156 ms typ, 4.572 ms max |
| ADC Conversion Time CT bit 111 | 8.244 ms typ, 9.068 ms max |
| SMBus Timeout | 28 ms min, 35 ms typ; Interface resets whenever SCL is low for more than 28 ms |
| Digital Input Capacitance | 3 pF; Digital input/output |
| Digital Leakage Input Current | 0.5 uA typ, 2 uA max; 0 V <= SCL, SDA, ALERT, A0, A1 <= VS |
| SDA High-Level Input Voltage | 1.4 to 6 V; SDA pin |
| SDA Low-Level Input Voltage | -0.3 to 0.4 V; SDA pin |
| Low-Level Output Voltage | 0 to 0.4 V; IOL=3 mA, SDA and ALERT pins |
| Digital Input Hysteresis | 500 mV; Digital input/output |
| Quiescent Current | 310 uA typ, 400 uA max; VS=3.3 V, normal operation |
| Shutdown Quiescent Current | 2 uA typ, 5 uA max; Power-down shutdown mode |
| Power-On Reset Threshold Voltage | 2 V; POR threshold |
| Datasheet Status | request_only |
Product Overview
The INA233 is a Texas Instruments Power_Management Power_IC described as an I2C PMBus power monitor. It measures bus voltage over a 0 to 36 V operating range and uses a 2.7 to 5.5 V supply, with I2C, SMBus, and PMBus-compatible digital interface voltage compatibility from 1.8 to 5.0 V.
Measurement-related specifications include a 16-bit ADC native resolution, -81.92 to 81.9175 mV shunt-voltage input range, 2.5 uV shunt-voltage LSB step size, and 1.25 mV bus-voltage LSB step size. Accuracy parameters include 0.02% typical and 0.1% maximum shunt and bus voltage gain error, 0.05% typical and 0.2% maximum power gain error, and common-mode rejection of 126 dB minimum and 140 dB typical.
The device is supplied in a DGS VSSOP-10 package measuring 3.00 mm x 4.90 mm. Thermal data for this package includes 171.4 degC/W junction-to-ambient thermal resistance and 42.9 degC/W junction-to-case top thermal resistance. With 16 programmable addresses and low-power shutdown current of 2 uA typical, it fits digital power-monitoring designs using PMBus-style telemetry.
Key Features
- 0 to 36 V bus-voltage sensing operating range
- 2.7 to 5.5 V operating supply range
- 1.8 to 5.0 V compatible digital interface
- 16-bit ADC native resolution for DC accuracy
- 2.5 uV shunt-voltage LSB step size
- 1.25 mV bus-voltage LSB step size
- 0.1% maximum shunt and bus voltage gain error
- 126 dB minimum common-mode rejection ratio
- 16 programmable addresses using A0 and A1 pins
- 2 uA typical shutdown quiescent current
- -40 to 125 degC specified operating temperature
- DGS VSSOP-10 package, 3.00 mm x 4.90 mm
Typical Applications
- I2C power monitoring
- PMBus telemetry systems
- Bus voltage measurement
- Shunt voltage measurement
- Digital power supervision
- Low-power standby monitoring
- Multi-address monitor networks
- Wide-temperature power systems
Procurement Notes
When requesting a quote for INA233, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What bus voltage range does the INA233 support?
The INA233 supports a 0 to 36 V bus-voltage sense range. Its bus-voltage ADC full-scale scaling is 40.96 V, but the extracted operating condition states not to apply more than 36 V.
What supply voltage is recommended for INA233 operation?
The recommended operating supply voltage for the INA233 is 2.7 to 5.5 V. The absolute maximum supply-voltage rating is 6 V, while normal operation is specified with 310 uA typical quiescent current.
What digital interfaces are compatible with the INA233?
The INA233 uses an I2C, SMBus, and PMBus-compatible interface. The extracted digital interface voltage compatibility range is 1.8 to 5.0 V, and the SMBus timeout is 28 ms minimum and 35 ms typical.
What measurement resolution does the INA233 provide?
The INA233 has a 16-bit ADC native resolution. Its shunt-voltage LSB step size is 2.5 uV, and its bus-voltage LSB step size is 1.25 mV under the listed DC accuracy conditions.
What package is used for the INA233?
The INA233 is provided in a DGS VSSOP-10 package measuring 3.00 mm x 4.90 mm. Thermal data for this package includes 171.4 degC/W junction-to-ambient thermal resistance and 42.9 degC/W junction-to-case top thermal resistance.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 12, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.