SN412008DRG4 Equivalent & Substitute Parts

Part Overview

The SN412008DRG4 is a dual-channel audio amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as a linear audio amplifier with single-ended output configuration, designed for audio signal processing applications requiring low-noise amplification across a wide supply voltage range of 5V to 36V.

The SN412008DRG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent substitute components. Equivalent parts must maintain compatibility with the original electrical specifications, mechanical packaging, and thermal operating range to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	SN412008DRG4 Specification
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	Audio
Number of Circuits	2
Output Type	Single-Ended
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	20V/µs
Gain Bandwidth Product	8 MHz
Current - Input Bias	5 pA
Voltage - Input Offset	500 µV
Current - Supply	4mA (x2 Channels)
Current - Output / Channel	35 mA
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	36 V
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of the SN412008DRG4 is determined by the following critical parameters:

Mechanical Compatibility:

Package type: 8-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Pin count and footprint must match for direct PCB replacement

Electrical Compatibility:

Number of circuits: 2 channels
Supply voltage range: Minimum 5V, Maximum 36V
Operating temperature range: -40°C to 85°C minimum
Output current per channel: 35 mA minimum
Input bias current: 5 pA maximum
Input offset voltage: 500 µV maximum

Regulatory Compliance:

RoHS3 compliance required
REACH unaffected status

Substitute parts are grouped based on amplifier type classification (Audio, J-FET, or General Purpose) and their ability to meet or exceed the electrical performance requirements of the original device within the specified operating conditions.

Parameter Comparison

Parameter	SN412008DRG4	AD746JRZ	ADA4000-2ARZ-RL	LM833DT	LT1169CS8#PBF	MC33078DT	MC33078YDT	TL062ID
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	STMicroelectronics	Analog Devices Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	Audio	J-FET	J-FET	Audio	J-FET	General Purpose	General Purpose	J-FET
Number of Circuits	2	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Slew Rate (V/µs)	20	75	20	7	4.2	7	7	3.5
Gain Bandwidth Product (MHz)	8	13	5	15	5.3	15	15	1
Current - Input Bias (pA)	5	110	5	300000	4	250000	250000	30
Voltage - Input Offset (µV)	500	300	200	300	600	150	150	3000
Current - Supply (mA)	4	7	1.35	4	5.3	4	4	0.2
Current - Output / Channel (mA)	35	25	28	37	Not Specified	37	37	20
Voltage - Supply Span Min (V)	5	9	8	5	9	5	5	6
Voltage - Supply Span Max (V)	36	36	36	30	40	30	30	36
Operating Temperature (°C)	-40 ~ 85	0 ~ 70	-40 ~ 125	-40 ~ 105	0 ~ 70	-40 ~ 105	-40 ~ 105	-40 ~ 105
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LM833DT (STMicroelectronics) is the most direct substitute for the SN412008DRG4. Both devices are classified as audio amplifiers with dual circuits in 8-SOIC packaging. The LM833DT meets the minimum supply voltage requirement of 5V and maximum of 30V (within the original 36V specification). Output current per channel is 37 mA, exceeding the original 35 mA requirement. Operating temperature range extends to 105°C, covering the original -40°C to 85°C specification. RoHS3 compliance and active product status ensure long-term availability and regulatory alignment.

MC33078DT and MC33078YDT (STMicroelectronics) are general-purpose amplifiers with identical electrical specifications. Both provide 37 mA output current per channel and operate across -40°C to 105°C. The MC33078YDT variant includes AEC-Q100 automotive qualification. Supply voltage range is 5V to 30V. Both are actively produced with substantial inventory availability.

Secondary Substitutes (Conditional Compatibility):

ADA4000-2ARZ-RL (Analog Devices Inc.) is a J-FET amplifier with extended operating temperature range (-40°C to 125°C) and active product status. However, the maximum supply voltage is limited to 36V (matching the original), but minimum supply voltage is 8V, which exceeds the original 5V minimum requirement. This device is suitable for applications not requiring operation below 8V.

LT1169CS8#PBF (Analog Devices Inc.) is a J-FET amplifier with maximum supply voltage of 40V. However, the minimum supply voltage is 9V, and the operating temperature range is 0°C to 70°C, which does not cover the original -40°C specification. This device is suitable only for applications with restricted temperature and supply voltage requirements.

AD746JRZ (Analog Devices Inc.) is a J-FET amplifier with slew rate of 75V/µs and gain bandwidth product of 13 MHz, both exceeding original specifications. However, the operating temperature range is 0°C to 70°C, and minimum supply voltage is 9V, limiting applicability to restricted operating conditions.

TL062ID (STMicroelectronics) is a J-FET amplifier with very low supply current (200 µA per channel) but significantly reduced output current per channel (20 mA), which falls below the original 35 mA requirement. Gain bandwidth product is 1 MHz, substantially lower than the original 8 MHz. This device is suitable only for low-power applications with reduced output current demands.

Compliance and Availability:

All substitute parts are RoHS3 compliant and REACH unaffected. All substitute parts except AD746JRZ and LT1169CS8#PBF are actively produced with substantial inventory availability, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the LM833DT directly replace the SN412008DRG4 on the PCB?

A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm Width) packaging with the same pin configuration for dual-channel amplifiers. The LM833DT meets or exceeds all critical electrical parameters including supply voltage range (5V to 30V covers the original 5V to 36V requirement), output current per channel (37 mA exceeds 35 mA), and operating temperature range (-40°C to 105°C covers the original -40°C to 85°C). Direct PCB substitution is supported without circuit modification.

Q: What is the key difference between audio amplifiers and J-FET amplifiers in this product category?

A: Audio amplifiers (SN412008DRG4, LM833DT) are optimized for audio signal processing with emphasis on low noise and distortion characteristics. J-FET amplifiers (AD746JRZ, ADA4000-2ARZ-RL, LT1169CS8#PBF, TL062ID) utilize junction field-effect transistor input stages, providing extremely low input bias current (typically in the picoampere range) and high input impedance. Both types are suitable for audio applications, but J-FET variants offer superior input characteristics for high-impedance signal sources.

Q: Why does the TL062ID have lower output current per channel than the original part?

A: The TL062ID is designed for low-power applications with emphasis on minimal supply current consumption (200 µA per channel versus 4 mA for the original). This design trade-off results in reduced output current capability (20 mA per channel versus 35 mA). The TL062ID is suitable only for applications where output current requirements do not exceed 20 mA per channel.

Q: What supply voltage considerations apply when selecting a substitute?

A: The original SN412008DRG4 operates across 5V to 36V. Substitute parts have varying minimum and maximum supply voltage specifications. LM833DT, MC33078DT, and MC33078YDT operate from 5V to 30V, which is compatible with most applications using the original part. ADA4000-2ARZ-RL requires minimum 8V supply, making it unsuitable for 5V-only applications. LT1169CS8#PBF and AD746JRZ require minimum 9V supply. Verify the application's supply voltage range before selecting a substitute.

Q: Are the MC33078DT and MC33078YDT interchangeable?

A: Yes. Both devices have identical electrical specifications and 8-SOIC packaging. The primary difference is that MC33078YDT includes AEC-Q100 automotive qualification, making it suitable for automotive applications requiring this certification. For non-automotive applications, either variant is acceptable. MC33078YDT has lower inventory availability (7,800 units) compared to MC33078DT (133,465 units).

Q: What is the significance of operating temperature range differences?

A: The original SN412008DRG4 operates from -40°C to 85°C. Substitute parts have varying temperature ranges. LM833DT, MC33078DT, and MC33078YDT extend to 105°C, providing additional thermal margin. ADA4000-2ARZ-RL extends to 125°C. Conversely, AD746JRZ and LT1169CS8#PBF are limited to 0°C to 70°C, which does not cover the original -40°C minimum. Select substitutes based on the application's actual operating temperature requirements.

Q: How do input offset voltage specifications affect circuit performance?

A: Input offset voltage represents the DC voltage difference between the two input terminals when the output is at zero. The original SN412008DRG4 specifies 500 µV maximum. Substitutes range from 150 µV (MC33078DT, MC33078YDT) to 3 mV (TL062ID). Lower offset voltage reduces DC errors in precision applications. For audio applications, offset voltage differences are typically negligible due to AC coupling. For DC-coupled precision circuits, select substitutes with offset voltage specifications matching or better than the original.

Q: What does RoHS3 compliance indicate?

A: RoHS3 compliance indicates the device meets Restriction of Hazardous Substances Directive requirements, restricting the use of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. All substitute parts listed are RoHS3 compliant, ensuring regulatory alignment with environmental and safety standards applicable to electronic components in most jurisdictions.

Q: Why is product status (Active vs. Discontinued) important for component selection?

A: Active product status indicates ongoing manufacturing and availability through authorized distributors, ensuring long-term supply chain continuity and stable pricing. The original SN412008DRG4 is discontinued, necessitating substitution. All recommended substitute parts are actively produced, providing reliable availability for current and future production requirements.

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