INA301A1IDGKR Comprehensive Device Information

1. Basic Device Overview

• Part Number: INA301A1IDGKR
• Manufacturer: Texas Instruments
• Document Number: SBOS713A (Revised February 2016, Originally Released September 2015)
• Device Type: 36‑V High‑Speed Zero‑Drift Voltage‑Output Current‑Shunt Monitor with High‑Speed Overcurrent Comparator
• Gain Option: A1 version with fixed gain of 20 V/V
• Package: 8‑pin VSSOP (DGK), body size 3.00 mm × 3.00 mm
• Status: Active (Production)
• RoHS: Compliant
• Temperature Range: –40°C to +125°C
• Marking: ZGD6

2. Key Features

• Wide common‑mode input range: 0 V to 36 V
• Dual output: precision amplifier + high‑speed overcurrent comparator
• High accuracy:
• Fast alert response: total propagation delay ≤1 µs
• Programmable threshold via single external resistor (RLIMIT)
• Open‑drain ALERT output with transparent/latched modes
• Single supply operation: 2.7 V to 5.5 V
• Low quiescent current: max 700 µA
• Hysteresis: 20 mV (A1 version)
• ESD ratings: HBM ±2000 V, CDM ±1000 V

3. Pin Configuration (8‑Pin VSSOP, Top View)

4. Electrical Specifications (INA301A1, TA = 25°C, VS = 5 V)

Input

• Common‑mode voltage (VCM): 0–36 V
• Differential input range (VIN): 0–250 mV
• CMRR: 100–110 dB (–40°C to 125°C)
• Input bias current: max 120 µA

Output

• Gain (G): 20 V/V
• Gain error: ±0.03% (typ), ±0.1% (max)
• Nonlinearity error: ±0.01%
• Bandwidth: 550 kHz
• Voltage noise density: 30 nV/√Hz

Comparator

• Alert delay (tPLH): typ 0.75 µs, max 1 µs
• LIMIT pin current source: 80 µA (typ)
• Comparator offset voltage: typ 1 mV, max 3.5 mV
• VOL (ALERT low): max 300 mV @ IOL = 3 mA

Power

• Supply voltage (VS): 2.7 V–5.5 V
• Quiescent current (IQ): max 700 µA (–40°C to 125°C)

5. Absolute Maximum Ratings

• VS: 6 V
• Common‑mode input: GND – 0.3 V to 40 V
• Differential input (IN+ – IN–): –40 V to 40 V
• ALERT pin voltage: GND – 0.3 V to 6 V
• Junction temperature (TJ): 150°C
• Storage temperature (Tstg): –65°C to 150°C

6. Thermal Information (DGK Package)

• Junction‑to‑ambient thermal resistance (RθJA): 161.5°C/W
• Junction‑to‑top (RθJC(top)): 62.3°C/W
• Junction‑to‑board (RθJB): 81.4°C/W

7. Functional Modes

ALERT Output Modes

• Transparent Mode: RESET = LOW; ALERT follows input condition in real time
• Latched Mode: RESET = HIGH; ALERT remains low until reset pulse (≥100 ns LOW)

Threshold Setting

• Resistor‑controlled: VLIMIT = 80 µA × RLIMIT; set via single resistor to GND
• Voltage‑controlled: LIMIT pin driven by DAC or precision voltage source

Input Filtering & Transient Protection

• RC filter on IN+/IN– reduces noise; small filter resistors (≤10 Ω) recommended
• Over‑36 V transient protection: series 10 Ω resistors + Zener/TVS diodes

8. Applications

• Overcurrent protection (OCP)
• Power supply & load protection
• Circuit breakers
• Computers, servers, telecom equipment
• Battery management systems
• High‑side/low‑side current sensing

9. Packaging & Ordering

• Package: VSSOP‑8 (DGK)
• Quantity: 2500 units per large tape‑and‑reel
• Lead finish: NIPDAU / SN / NIPDAUAG
• MSL rating: Level‑2, 260°C peak reflow, 1‑year shelf life
• Qualified variants: Automotive grade INA301‑Q1 available

10. Layout Guidelines

• Place 0.1 µF bypass cap close to VS and GND
• Connect RLIMIT directly to GND pin; minimize vias
• ALERT pin: 10 kΩ pullup resistor recommended
• Keep shunt resistor close to IN+/IN–; short, low‑impedance traces

11. Reliability & Safety Notes

• ESD sensitive; handle with ESD protection
• Absolute max ratings are stress‑only; not for continuous operation
• Bypass capacitors required for supply stability