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Texas Instruments INA310B5IDGKR
- Part No.:
- INA310B5IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA310B5IDGKR.pdf
- Description:
- -4-V TO 110-V 1.3-MHZ HIGH-PRECI
- Quantity:
- Payment:
- Shipping:
Inventory:2,044
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Product details
Overview
INA310B5IDGKR from Texas Instruments is an ultra-precise current sense amplifier with integrated open-drain comparator and 0.6 V internal reference, designed for high-side or low-side shunt monitoring in 48 V systems. It delivers 500 V/V fixed gain, 1.3 MHz bandwidth, ±150 µV max offset voltage, and operates across –4 V to +110 V common-mode range with 2.7 V to 20 V supply.
For engineers reviewing the INA310B5IDGKR datasheet, INA310B5IDGKR pinout, INA310B5IDGKR application, or INA310B5IDGKR equivalent, this device supports fast overcurrent protection in DC/DC converters, BMS, and rack-server power supplies where precision, speed, and wide common-mode tolerance are critical.
Technical Context
The INA310B5IDGKR uses a zero-drift topology enabling ±150 µV max input offset and ±1 µV/°C drift over –40°C to +125°C, while maintaining 140–160 dB CMRR across its full –4 V to +110 V common-mode range. Its 2.5 V/µs slew rate and 1 µs comparator propagation delay support real-time fault response in high-voltage power conversion.
It integrates a latching open-drain comparator with 0.6 V internal reference and hysteresis (8 mV), where trip threshold is set externally via resistor divider on CMPIN. RESET pin controls latching (high) vs transparent (low/open) mode - no external logic required for basic overcurrent flagging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - enables accurate measurement of sub-10 mV shunt drops in high-current 48 V systems |
| Common-mode range | –4 V to +110 V - supports both high-side and low-side sensing beyond supply rails, e.g., 48 V BMS bus monitoring |
| Bandwidth | 900 kHz - sufficient for detecting fast transients in 48 V DC/DC converters and solenoid drive circuits |
| Offset voltage (max) | ±150 µV - ensures <0.3% error at 50 mV sense voltage, critical for low-R shunt accuracy |
| Comparator propagation delay | 1 µs - enables sub-microsecond overcurrent response for IGBT/MOSFET gate shutdown coordination |
| Supply voltage | 2.7 V to 20 V - compatible with 3.3 V, 5 V, or 12 V control rails while sensing up to 110 V bus |
| Quiescent current | 2.25 mA - low enough for always-on monitoring in battery-backed 48 V rack servers |
Pinout & Package
INA310B5IDGKR is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm), optimized for space-constrained 48 V power modules and telecom RRU designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Power supply input | Accepts 2.7 V–20 V; powers amplifier and comparator; independent of sensed common-mode voltage |
| OUT | Analog output | Amplified sense voltage (VSENSE × 500); rail-to-rail swing within 20 mV of GND and 150 mV of VS |
| CMPIN | Comparator input | Receives divided-down OUT signal; threshold set by external resistors relative to 0.6 V internal reference |
| GND | Analog ground | Reference for amplifier output and comparator logic; must be Kelvin-connected to shunt low-side in low-side config |
| RESET | Comparator mode control | Active-high latching enable; grounded or open for transparent operation; drives CMPOUT state directly |
| CMPOUT | Open-drain alert output | Pulled low when CMPIN exceeds threshold; requires external pull-up to 0–20 V rail; compatible with 3.3 V/5 V GPIO |
| IN– | Negative shunt sense | Connect to load side (high-side) or ground side (low-side); matched input bias current minimizes common-mode error |
| IN+ | Positive shunt sense | Connect to bus side (high-side) or load side (low-side); supports Kelvin routing for <1% gain error |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.6 V reference | Eliminates need for external reference IC or precision voltage source in overcurrent threshold circuitry |
| Latching comparator mode | Enables persistent fault flagging without microcontroller polling - RESET pin controls latch vs transparent behavior |
| Flat 20 µA input bias current | Remains stable across –20 V to +120 V common-mode range, avoiding gain error drift in high-voltage sensing |
| Zero-drift architecture | Delivers ±150 µV max offset and ±1 µV/°C drift - enables accurate current measurement over full industrial temperature range |
| High CMRR (140 dB min) | Maintains accuracy in noisy 48 V PSU environments where bus ripple or switching noise could corrupt sense signals |
Applications
| 48 V Battery Management System (BMS) | 48 V Rack Server PSU |
|---|---|
Use Scenario: Real-time cell-string current monitoring during charge/discharge cycles in telecom or datacenter battery banks. IC Role / Device Role / Timing Role: High-side current sense amplifier with integrated comparator provides fast overcurrent detection and latched fault signaling to system controller. Use Value: ±150 µV offset enables <1 A error at 500 A full-scale with 100 µΩ shunt; 1 µs comparator delay allows immediate MOSFET shutdown before thermal damage. |
Use Scenario: Input/output current monitoring in multi-phase 48 V–12 V buck converters powering CPU/GPU VRMs. IC Role / Device Role / Timing Role: Low-side shunt amplifier feeding ADC and comparator for digital power management and hardware-level OCP. Use Value: 900 kHz bandwidth captures phase-current ripple; 500 V/V gain resolves 2 mV sense voltage to 1 V output - matches 12-bit ADC input range directly. |
| Macro Remote Radio Unit (RRU) | Solenoid & Actuator Driver |
Use Scenario: Monitoring PA module supply current in 5G macro base stations operating from -40°C to +85°C outdoor enclosures. IC Role / Device Role / Timing Role: High-side current sensor with integrated comparator flags overcurrent events to FPGA-based protection logic. Use Value: –40°C to +125°C rating ensures reliability in sealed RRU housings; 140 dB CMRR rejects RF coupling into sense traces near power amplifiers. |
Use Scenario: Closed-loop current control and stall detection in industrial pneumatic/hydraulic valve actuators powered from 48 V DC. IC Role / Device Role / Timing Role: Low-side shunt monitor providing analog feedback to PWM driver and latched fault output for emergency stop. Use Value: 2.5 V/µs slew rate tracks rapid solenoid turn-on transients; ±1 µV/°C offset drift prevents false trips across ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5IDR | 500 V/V gain, 800 kHz BW, ±120 µV offset, no integrated comparator or reference | Requires external comparator and reference for overcurrent flagging; higher BW not needed in slower BMS monitoring | Choose if only analog output is required and board space allows discrete comparator implementation |
| MAX40056ATA+T | 500 V/V gain, 1.5 MHz BW, ±100 µV offset, 0.6 V reference, but no latching mode or RESET pin | Comparator is always transparent; cannot hold fault state without external latch or MCU intervention | Choose for high-speed transient capture where persistent flagging is handled in firmware or external logic |
Compared with INA240A5IDR and MAX40056ATA+T, the INA310B5IDGKR uniquely combines precision gain, integrated latching comparator, and rail-independent common-mode range - reducing component count and improving fault response determinism in safety-critical 48 V power systems.
Availability
INA310B5IDGKR is available at Aetrix Electronics and suitable for 48 V battery management systems, macro remote radio units, and rack-server power supplies requiring stable component supply and long-term industrial lifecycle support.
Supply support for INA310B5IDGKR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.
The INA310x family was engineered specifically for high-voltage, high-accuracy current sensing in next-generation 48 V architectures - balancing speed, precision, integration, and robustness for automotive, telecom, and datacenter power systems.
FAQ
What is the maximum common-mode voltage the INA310B5IDGKR can withstand during normal operation?
The INA310B5IDGKR supports a continuous operational common-mode input range of –4 V to +110 V, independent of supply voltage. This allows direct high-side sensing on 48 V or 60 V bus lines without level-shifting circuitry. Its survival rating extends to –20 V to +120 V, providing margin against transients.
Does the INA310B5IDGKR require external components to configure its 500 V/V gain?
No - the INA310B5IDGKR features factory-trimmed internal resistors that fix its gain at exactly 500 V/V. Texas Instruments explicitly advises against adding external resistors to modify gain, as absolute resistor values vary significantly across units and would degrade accuracy and stability.
How does the RESET pin affect comparator behavior in the INA310B5IDGKR?
In the INA310B5IDGKR, pulling RESET high enables latching mode: CMPOUT stays high after overcurrent detection until RESET is pulled low or left floating. With RESET grounded or open, the comparator operates transparently - CMPOUT follows CMPIN in real time. This dual-mode flexibility simplifies fault-handling architecture.
Can the INA310B5IDGKR be used for low-side current sensing, and what layout considerations apply?
Yes - the INA310B5IDGKR supports both high-side and low-side configurations. For low-side use, connect IN+ to the load side and IN– to ground. Layout must employ Kelvin connections to the shunt, minimize trace inductance, and place 0.1 µF ceramic bypass capacitor between VS and GND close to the DGK package pins.
What is the typical propagation delay from shunt overcurrent to CMPOUT assertion in the INA310B5IDGKR?
The total propagation delay from VSENSE exceeding the programmed threshold to CMPOUT going low (open-drain active) is 1 µs under standard conditions (20 mV overdrive). This includes amplifier settling, external resistor-divider delay, and comparator response - making it suitable for hardware-level protection in fast-switching power stages.
INA310B5IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 900 kHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 15 µV
- Current - Supply:
- 1.6mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 20 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA310B5IDGKR FAQ
1.How can I place an order for INA310B5IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA310B5IDGKR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA310B5IDGKR reliable?
The price and inventory of INA310B5IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA310B5IDGKR is usually 5 days.
3.What payment methods are accepted for INA310B5IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA310B5IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA310B5IDGKR?
INA310B5IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA310B5IDGKR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA310B5IDGKR?
For technical support, including INA310B5IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA310B5IDGKR requirements.
6.How does Aetrix verify that INA310B5IDGKR is sourced from the original manufacturer or authorized distributors?
All INA310B5IDGKR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA310B5IDGKR meets industry standards.
7.What is the process for return or replacement of INA310B5IDGKR?
All INA310B5IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with INA310B5IDGKR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA310B5IDGKR part is unused and in its original packaging.
Return procedure for INA310B5IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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