LM833MM Audio Amplifier 2 Circuit 8-VSSOP Equivalent & Substitute Parts

Part Overview

The LM833MM is a dual-channel audio amplifier integrated circuit manufactured by Texas Instruments in 8-VSSOP surface mount packaging. This device is classified as obsolete product status, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The LM833MM delivers audio amplification with a 15 MHz gain bandwidth product and 7 V/µs slew rate, suitable for audio signal processing applications requiring dual-channel operation within a 30 V supply span.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM833MM
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	Audio
Number of Circuits	2
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Slew Rate	7 V/µs
Gain Bandwidth Product	15 MHz
Current - Input Bias	500 nA
Voltage - Input Offset	300 µV
Current - Supply	5 mA (x2 Channels)
Current - Output / Channel	40 mA
Voltage - Supply Span	30 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the LM833MM is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Matching Parameters:

Number of circuits: 2 channels required
Package / Case: 8-TSSOP or 8-MSOP (0.118", 3.00mm Width) for mechanical compatibility
Mounting Type: Surface Mount
Voltage - Supply Span: Minimum 30 V capability
Operating Temperature: Support for -40°C ~ 85°C range

Functional Performance Parameters:

Slew Rate: 7 V/µs or greater
Gain Bandwidth Product: 15 MHz or greater
Current - Output / Channel: 40 mA or greater
Current - Input Bias: 500 nA or lower
Voltage - Input Offset: 300 µV or lower

Substitute parts are grouped into two categories: direct equivalents (same base product with different packaging) and functional alternatives (different amplifier types meeting or exceeding electrical specifications).

Parameter Comparison

Parameter	LM833MM	LM833MM/NOPB	AD8512ARMZ	AD8512ARMZ-REEL	AD8672ARMZ	AD8672ARMZ-REEL	ADA4000-2ARMZ	ADA4000-2ARMZ-RL	ADA4004-2ARMZ	ADA4004-2ARMZ-R7	ADA4004-2ARMZ-RL
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Audio	Audio	J-FET	J-FET	General Purpose	General Purpose	J-FET	J-FET	General Purpose	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
Slew Rate (V/µs)	7	7	20	20	4	4	20	20	2.7	2.7	2.7
Gain Bandwidth Product (MHz)	15	15	8	8	10	10	5	5	12	12	12
Current - Input Bias (nA)	500	500	0.025	0.025	3	3	0.005	0.005	40	40	40
Voltage - Input Offset (µV)	300	300	100	100	20	20	200	200	40	40	40
Current - Supply (mA x2 Channels)	5	5	2.2	2.2	3	3	1.35	1.35	—	—	—
Current - Output / Channel (mA)	40	40	70	70	20	20	28	28	10	10	10
Voltage - Supply Span (Min V)	30	30	10	10	10	10	8	8	10	10	10
Voltage - Supply Span (Max V)	30	30	30	30	36	36	36	36	30	30	30
Operating Temperature (°C)	-40 ~ 85	-40 ~ 85	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

LM833MM/NOPB is the direct equivalent of LM833MM, differing only in packaging format (Tape & Reel versus standard packaging). This part maintains identical electrical specifications and is classified as Active product status with ROHS3 compliance. Selection of LM833MM/NOPB eliminates obsolescence risk while preserving all functional characteristics of the original design.

Functional Alternatives (Secondary Substitutes):

The following parts meet or exceed the electrical requirements of LM833MM while offering enhanced specifications and active product status:

AD8512ARMZ and AD8512ARMZ-REEL (J-FET Amplifier): These parts exceed slew rate performance (20 V/µs versus 7 V/µs) and provide superior input bias current (25 pA versus 500 nA). Output current capability is increased to 70 mA per channel. Supply voltage range is reduced to 10-30 V, which remains compatible with 30 V fixed supply applications. Operating temperature extends to 125°C. These parts are suitable for applications requiring lower input bias current and higher slew rate performance.

AD8672ARMZ and AD8672ARMZ-REEL (General Purpose Amplifier): These parts provide extended supply voltage range (10-36 V) and superior input offset voltage (20 µV versus 300 µV). Operating temperature extends to 125°C. Slew rate is reduced to 4 V/µs and output current is limited to 20 mA per channel. These parts are suitable for precision audio applications where input offset voltage is critical and output current requirements are moderate.

ADA4000-2ARMZ and ADA4000-2ARMZ-RL (J-FET Amplifier): These parts provide extended supply voltage range (8-36 V), superior input bias current (5 pA), and slew rate of 20 V/µs. Operating temperature extends to 125°C. Output current is 28 mA per channel. These parts are suitable for low-bias-current applications with extended temperature range.

ADA4004-2ARMZ, ADA4004-2ARMZ-R7, and ADA4004-2ARMZ-RL (General Purpose Amplifier, iPolar® Series): These parts provide gain bandwidth product of 12 MHz, input offset voltage of 40 µV, and extended operating temperature to 125°C. Supply voltage range is 10-30 V. Output current is limited to 10 mA per channel. These parts are suitable for general-purpose audio applications requiring lower output current and improved input offset voltage specifications.

All substitute parts listed are ROHS3 compliant and carry Active product status, eliminating obsolescence concerns associated with the original LM833MM.

Frequently Asked Questions (FAQ)

Q: Can LM833MM/NOPB be used as a direct replacement for LM833MM?

A: Yes. LM833MM/NOPB is the direct equivalent, differing only in packaging format (Tape & Reel). All electrical specifications, pin configuration, and functional characteristics are identical. The primary advantage is Active product status and ROHS3 compliance.

Q: What is the key difference between J-FET and General Purpose amplifier substitutes?

A: J-FET amplifiers (AD8512, ADA4000 series) feature extremely low input bias current (25 pA to 5 pA range), making them suitable for high-impedance signal sources. General Purpose amplifiers (AD8672, ADA4004 series) feature moderate input bias current (3 nA to 40 nA range) and are optimized for standard audio applications. Selection depends on source impedance requirements.

Q: Are all substitute parts compatible with 30 V supply voltage?

A: Yes. All listed substitute parts support maximum supply voltage of 30 V or greater. However, some parts (ADA4000 series) support minimum supply voltage as low as 8 V, providing greater flexibility for reduced-voltage applications.

Q: What is the impact of reduced slew rate in AD8672 and ADA4004 substitutes?

A: AD8672 and ADA4004 series feature slew rates of 4 V/µs and 2.7 V/µs respectively, compared to 7 V/µs for LM833MM. Slew rate determines the maximum rate of voltage change. Lower slew rate may limit performance in high-frequency audio applications or fast transient signal processing. These parts are suitable for standard audio bandwidth applications (20 Hz to 20 kHz).

Q: What is the significance of output current differences?

A: LM833MM provides 40 mA per channel output current. AD8512 provides 70 mA (higher), AD8672 provides 20 mA (lower), ADA4000 provides 28 mA (lower), and ADA4004 provides 10 mA (significantly lower). Output current capability determines the maximum load impedance that can be driven. Lower output current requires higher load impedance or additional output buffering stages.

Q: Are packaging options interchangeable?

A: All substitute parts use 8-TSSOP or 8-MSOP packages with 0.118" (3.00mm) width, ensuring mechanical compatibility with LM833MM PCB layouts. Packaging format differences (Tube, Cut Tape & Digi-Reel, Tape & Reel) affect only supply and handling, not electrical or mechanical compatibility.

Q: What compliance advantages do substitute parts offer?

A: All substitute parts are ROHS3 compliant, whereas LM833MM is RoHS non-compliant. This is significant for applications subject to RoHS regulations or customer requirements. All parts carry REACH Unaffected status and EAR99 export classification.

Q: Which substitute provides the best overall performance match?

A: LM833MM/NOPB provides the closest performance match as a direct equivalent. For applications requiring enhanced specifications, AD8512ARMZ or AD8512ARMZ-REEL offer superior slew rate and input bias current performance while maintaining 40+ mA output current capability.

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