OPA684IDBVRG4 Equivalent & Substitute Parts

Part Overview

The OPA684IDBVRG4 is a current feedback amplifier integrated circuit manufactured by Texas Instruments, housed in a SOT-23-6 surface mount package. This device is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The OPA684IDBVRG4 delivers high-speed amplification with a gain bandwidth product of 1.9 GHz and slew rate of 820V/µs, making it suitable for applications requiring broadband signal processing in the 5V to 12V supply range.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	OPA684IDBVRG4	—
Manufacturer	Texas Instruments	—
Amplifier Type	Current Feedback	—
Number of Circuits	1	—
Slew Rate	820	V/µs
Gain Bandwidth Product	1.9	GHz
-3dB Bandwidth	210	MHz
Current - Input Bias	5	µA
Voltage - Input Offset	1.5	mV
Current - Supply	1.7	mA
Current - Output / Channel	160	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 85	°C
Package / Case	SOT-23-6	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	2 (1 Year)	—

Substitute Part Grouping Explanation

Substitution of the OPA684IDBVRG4 is determined by strict adherence to electrical and mechanical parameters. The primary substitution criteria are:

Electrical Compatibility Parameters:

Amplifier type classification (current feedback vs. general purpose)
Supply voltage range (minimum 5V, maximum 10V to 12V)
Operating temperature range (-40°C to 85°C)
Package type (SOT-23-6)
Mounting configuration (surface mount)

Performance Parameters:

Slew rate (820V/µs baseline)
Gain bandwidth product (1.9 GHz baseline)
-3dB bandwidth (210 MHz baseline)
Input bias current (5 µA baseline)
Input offset voltage (1.5 mV baseline)
Output current capability (160 mA baseline)
Supply current (1.7 mA baseline)

Compliance Parameters:

RoHS3 compliance
Moisture sensitivity level (MSL 2)
REACH unaffected status

Substitutes are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (functionally compatible with allowable parameter variations within the same application class).

Parameter Comparison

Parameter	OPA684IDBVRG4	OPA684IDBVT	EL5106IWZ-T7A	EL5160IWZ-T7	EL5160IWZ-T7A	EL5164IWZ-T7	EL5164IWZ-T7A
Manufacturer	Texas Instruments	Texas Instruments	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics
Amplifier Type	Current Feedback	Current Feedback	General Purpose	Current Feedback	Current Feedback	Current Feedback	Current Feedback
Slew Rate (V/µs)	820	820	4500	1700	1700	4700	4700
Gain Bandwidth Product (GHz)	1.9	1.9	—	—	—	—	—
-3dB Bandwidth (MHz)	210	210	380	200	200	600	600
Current - Input Bias (µA)	5	5	1.5	5	5	2	2
Voltage - Input Offset (mV)	1.5	1.5	1	1.6	1.6	1.5	1.5
Current - Supply (mA)	1.7	1.7	1.5	0.75	0.75	3.5	3.5
Current - Output / Channel (mA)	160	160	100	140	140	190	190
Voltage - Supply Span Min (V)	5	5	5	5	5	5	5
Voltage - Supply Span Max (V)	12	12	12	10	10	12	12
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package / Case	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	Active	Obsolete	Active	Active	Obsolete	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

The OPA684IDBVT is the primary direct substitute for the OPA684IDBVRG4. Both devices are manufactured by Texas Instruments and share identical electrical specifications across all measured parameters. The distinction between these parts is packaging format: OPA684IDBVRG4 is supplied in Digi-Reel packaging, while OPA684IDBVT is supplied in Tape & Reel format. The OPA684IDBVT maintains active product status, ensuring continued availability and supply chain reliability. This part is recommended for applications requiring exact electrical performance matching without design modification.

Manufacturer-Recommended Alternatives:

The Renesas Electronics EL5160IWZ-T7 and EL5160IWZ-T7A are current feedback amplifiers with active product status. These devices operate within the same supply voltage range (5V to 10V) and maintain identical operating temperature specifications. The EL5160 series exhibits a higher slew rate (1700V/µs vs. 820V/µs) and lower supply current consumption (750µA vs. 1.7mA), making them suitable for power-sensitive applications. The -3dB bandwidth is marginally lower (200 MHz vs. 210 MHz), representing a 4.8% reduction. These parts are compatible with SOT-23-6 surface mount assembly processes.

The Renesas Electronics EL5164IWZ-T7 and EL5164IWZ-T7A represent higher-performance alternatives with significantly enhanced slew rate (4700V/µs) and bandwidth (600 MHz). These devices support the full 5V to 12V supply range and deliver increased output current capability (190 mA vs. 160 mA). However, supply current consumption is elevated (3.5 mA vs. 1.7 mA). Both EL5164 variants carry obsolete product status, limiting long-term availability assurance.

The Renesas Electronics EL5106IWZ-T7A is classified as a general-purpose amplifier rather than current feedback topology. This device exhibits substantially higher slew rate (4500V/µs) and bandwidth (380 MHz) but operates with reduced output current (100 mA vs. 160 mA). The EL5106 is marked obsolete, restricting its suitability for new designs requiring sustained component availability.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 2 (1 Year) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can OPA684IDBVT directly replace OPA684IDBVRG4 without circuit modification?

A: Yes. The OPA684IDBVT is electrically identical to the OPA684IDBVRG4 across all specified parameters. The only difference is packaging format (Tape & Reel vs. Digi-Reel). Both devices are housed in SOT-23-6 packages with identical pinouts and electrical characteristics. No circuit redesign is required.

Q: What is the primary advantage of selecting EL5160IWZ-T7A over OPA684IDBVT?

A: The EL5160IWZ-T7A offers reduced supply current consumption (750µA vs. 1.7mA), representing a 55.9% reduction in quiescent current draw. This characteristic is advantageous in battery-powered or power-constrained applications. The device maintains current feedback amplifier topology and operates within the same temperature range. The trade-off is a marginal reduction in -3dB bandwidth (200 MHz vs. 210 MHz).

Q: Are EL5164IWZ-T7 and EL5164IWZ-T7A suitable for new production designs?

A: Both EL5164 variants carry obsolete product status, indicating discontinued manufacturing and limited future availability. While currently in stock, these parts are not recommended for new designs requiring long-term production support. The OPA684IDBVT or EL5160IWZ-T7A, both with active status, are preferred for sustained production requirements.

Q: What is the significance of the supply voltage range difference between OPA684IDBVRG4 and EL5160 series?

A: The OPA684IDBVRG4 supports supply voltages from 5V to 12V, while the EL5160 series operates from 5V to 10V. Applications requiring 10V to 12V supply operation must use OPA684IDBVT or EL5164 variants. Designs operating at 10V or below can utilize EL5160 devices without restriction.

Q: How do slew rate differences affect circuit performance?

A: Slew rate determines the maximum rate of voltage change the amplifier can produce. The OPA684IDBVRG4 slew rate of 820V/µs is suitable for broadband applications up to 210 MHz bandwidth. The EL5160 series (1700V/µs) and EL5164 series (4700V/µs) provide higher slew rates for applications requiring faster transient response or higher frequency operation. Selection depends on specific application bandwidth and signal fidelity requirements.

Q: Are all substitute parts compatible with existing PCB layouts designed for OPA684IDBVRG4?

A: Yes. All substitute parts listed maintain SOT-23-6 package specifications and surface mount mounting type. PCB footprints, solder pad configurations, and assembly processes remain compatible. No PCB redesign is necessary for mechanical integration.

Q: What packaging formats are available for substitute parts?

A: OPA684IDBVT is supplied in Tape & Reel format. EL5160IWZ-T7 is supplied in Cut Tape & Digi-Reel format. EL5160IWZ-T7A, EL5164IWZ-T7, and EL5164IWZ-T7A are supplied in Tape & Reel format. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Do all substitute parts meet RoHS3 and REACH compliance requirements?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the compliance profile of the OPA684IDBVRG4. These certifications ensure compatibility with environmental regulations and procurement standards.

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