RT3020GQL Equivalent & Substitute Parts

Part Overview

The RT3020GQL is a 3-axis digital accelerometer manufactured by Richtek USA Inc., designed for motion sensing applications requiring multi-axis acceleration measurement. This device operates across ±2g, 4g, 8g, and 16g selectable ranges with I2C output interface and is housed in a 12-LGA (2x2) surface mount package. The RT3020GQL is currently classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	RT3020GQL
Manufacturer	Richtek USA Inc.
Category	Motion Sensors
Type	Digital Accelerometer
Axis Configuration	X, Y, Z (3-Axis)
Acceleration Range	±2g, 4g, 8g, 16g (Selectable)
Sensitivity (LSB/g)	1024 (±2g) to 128 (±16g)
Bandwidth	3.125Hz to 200Hz
Output Interface	I2C
Supply Voltage	1.8V to 3.3V
Operating Temperature	-40°C to 85°C
Package Type	12-VFLGA (2x2)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the RT3020GQL is determined by strict alignment of the following critical parameters:

Axis Configuration: Must support X, Y, Z 3-axis measurement
Acceleration Range: Must support ±2g, 4g, 8g, 16g selectable ranges
Sensitivity: Must maintain LSB/g values of 1024 (±2g) through 128 (±16g)
Output Interface: Must use I2C communication protocol
Package: Must use 12-LGA (2x2) form factor for PCB compatibility
Mounting Type: Must be surface mount
Operating Temperature Range: Must cover -40°C to 85°C minimum
Supply Voltage: Must operate within or encompass 1.8V to 3.3V range
Compliance: Must maintain ROHS3 compliance and MSL 3 rating

The KXTJ3-1057 manufactured by Kionix Inc. meets all substitution criteria across these parameters.

Parameter Comparison

Parameter	RT3020GQL (Richtek)	KXTJ3-1057 (Kionix)	Compatibility
Axis Configuration	X, Y, Z	X, Y, Z	Match
Acceleration Range	±2g, 4g, 8g, 16g	±2g, 4g, 8g, 16g	Match
Sensitivity (LSB/g)	1024 (±2g) ~ 128 (±16g)	1024 (±2g) ~ 128 (±16g)	Match
Bandwidth	3.125Hz to 200Hz	800Hz	KXTJ3-1057 exceeds minimum requirement
Output Interface	I2C	I2C	Match
Supply Voltage	1.8V to 3.3V	1.71V to 3.6V	KXTJ3-1057 range encompasses RT3020GQL range
Operating Temperature	-40°C to 85°C	-40°C to 85°C	Match
Package / Case	12-VFLGA (2x2)	12-VFLGA (2x2)	Match
Mounting Type	Surface Mount	Surface Mount	Match
Product Status	Obsolete	Active	KXTJ3-1057 is actively manufactured
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	Match
MSL Rating	3 (168 Hours)	3 (168 Hours)	Match

Engineering Selection Recommendations

The KXTJ3-1057 is a direct functional equivalent to the RT3020GQL for applications requiring 3-axis digital acceleration measurement. Selection of the KXTJ3-1057 is supported by the following factors:

Product Status: The KXTJ3-1057 maintains active manufacturing status, ensuring long-term availability and supply chain continuity, whereas the RT3020GQL is obsolete.
Regulatory Compliance: Both devices maintain ROHS3 compliance and identical MSL 3 ratings, satisfying equivalent environmental and handling requirements.
Electrical Compatibility: The KXTJ3-1057 supply voltage range (1.71V to 3.6V) encompasses the RT3020GQL operating range (1.8V to 3.3V), ensuring compatibility with existing power supply designs.
Functional Equivalence: Identical axis configuration, acceleration ranges, sensitivity values, I2C interface, and operating temperature range ensure direct functional replacement without firmware modification.
Package Compatibility: Both devices use identical 12-VFLGA (2x2) surface mount packaging, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the KXTJ3-1057 directly replace the RT3020GQL on existing PCBs?

A: Yes. Both devices use identical 12-VFLGA (2x2) surface mount packages with matching pinouts for I2C communication, supply voltage, and ground connections. No PCB redesign is required.

Q: Are there differences in I2C communication protocols between these devices?

A: Both devices use I2C output interface. Register maps and command structures should be verified against respective datasheets to ensure firmware compatibility, though core I2C protocol remains consistent.

Q: What is the impact of the KXTJ3-1057 having 800Hz bandwidth versus the RT3020GQL's 3.125Hz to 200Hz range?

A: The KXTJ3-1057's 800Hz bandwidth exceeds the RT3020GQL's maximum 200Hz specification. Applications designed for the RT3020GQL will operate within the KXTJ3-1057's bandwidth capability. No performance degradation occurs; the substitute provides extended bandwidth capacity.

Q: Are supply voltage requirements compatible?

A: Yes. The KXTJ3-1057 operates from 1.71V to 3.6V, which encompasses the RT3020GQL's 1.8V to 3.3V range. Existing power supply designs require no modification.

Q: Do both devices have identical sensitivity specifications?

A: Yes. Both devices provide identical LSB/g sensitivity values across all selectable acceleration ranges: 1024 LSB/g at ±2g through 128 LSB/g at ±16g.

Q: What is the availability difference between these parts?

A: The RT3020GQL is obsolete with limited remaining inventory. The KXTJ3-1057 is actively manufactured by Kionix Inc., ensuring reliable long-term availability and supply chain stability.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both devices carry MSL 3 ratings with 168-hour exposure limits, requiring identical handling and storage protocols.

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