AD8546ARMZ-RL Equivalent & Substitute Parts

Part Overview

The AD8546ARMZ-RL is a CMOS dual-channel operational amplifier manufactured by Analog Devices Inc., designed for rail-to-rail signal conditioning applications. This 8-MSOP surface-mount device operates across a wide supply voltage range of 2.7 V to 18 V and maintains active product status with full RoHS3 compliance. Substitute parts are identified to address application requirements including extended temperature ranges, alternative packaging formats, and specific performance characteristics while maintaining functional compatibility within the dual-channel amplifier category.

Key Parameters

Parameter	Value
Manufacturer Part Number	AD8546ARMZ-RL
Manufacturer	Analog Devices Inc.
Category	Linear, Amplifiers
Amplifier Type	CMOS
Number of Circuits	2
Output Type	Rail-to-Rail
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Voltage - Supply Span (Min)	2.7 V
Voltage - Supply Span (Max)	18 V
Operating Temperature	-40°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant
Packaging	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitute parts for the AD8546ARMZ-RL are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Dual-channel configuration (Number of Circuits = 2)
Rail-to-rail output capability
Surface-mount 8-pin package format (8-MSOP or 8-VSSOP)
Supply voltage range overlap with 2.7 V minimum and 16 V or higher maximum
Operating temperature range that encompasses or extends the -40°C to 125°C specification
Active product status with current manufacturing availability

Substitution Logic: Parts are grouped into two categories based on performance characteristics and application suitability. The first group comprises CMOS amplifiers with performance parameters closely aligned to the AD8546ARMZ-RL, including lower slew rates and moderate gain-bandwidth products suitable for general-purpose signal conditioning. The second group includes general-purpose amplifiers with enhanced performance specifications, offering higher slew rates and bandwidth for applications requiring improved dynamic response. All substitute parts maintain dual-channel architecture, rail-to-rail output, surface-mount packaging, and active product status.

Parameter Comparison

Parameter	AD8546ARMZ-RL	BD7562FVM-TR	BD7562SFVM-TR	TLV2372IDGK	TLV2372IDGKR	TLV2402CDGK	TLV2402IDGK	TLV2402IDGKR	TLV2402QDGKRQ1
Manufacturer	Analog Devices Inc.	Rohm Semiconductor	Rohm Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Circuits	2	2	2	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	8-TSSOP, 8-MSOP	8-VSSOP, 8-MSOP	8-VSSOP, 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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.7 V	5 V	5 V	2.7 V	2.7 V	2.5 V	2.5 V	2.5 V	2.5 V
Voltage - Supply Span (Max)	18 V	14.5 V	14.5 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Slew Rate	0.08 V/µs	1 V/µs	1 V/µs	2.1 V/µs	2.1 V/µs	0.0025 V/µs	0.0025 V/µs	0.0025 V/µs	0.0025 V/µs
Gain Bandwidth Product	200 kHz	1 MHz	1 MHz	3 MHz	3 MHz	5.5 kHz	5.5 kHz	5.5 kHz	5.5 kHz
Current - Input Bias	5 pA	1 pA	1 pA	1 pA	1 pA	100 pA	100 pA	100 pA	100 pA
Voltage - Input Offset	3 mV	1 mV	1 mV	2 mV	2 mV	390 µV	390 µV	390 µV	390 µV
Current - Supply	18 µA (x2 Channels)	900 µA	900 µA	750 µA (x2 Channels)	750 µA (x2 Channels)	900 nA (x2 Channels)	900 nA (x2 Channels)	900 nA (x2 Channels)	900 nA (x2 Channels)
Current - Output / Channel	12 mA	14 mA	14 mA	16 mA	16 mA	200 µA	200 µA	200 µA	200 µA
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®	Tube	Tube	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)

Engineering Selection Recommendations

Group 1: CMOS Amplifiers with Moderate Performance

The BD7562FVM-TR and BD7562SFVM-TR from Rohm Semiconductor provide CMOS dual-channel amplifiers with enhanced slew rate (1 V/µs) and gain-bandwidth product (1 MHz) compared to the AD8546ARMZ-RL. Both parts maintain rail-to-rail output, surface-mount 8-MSOP packaging, and RoHS3 compliance. The BD7562SFVM-TR extends the operating temperature range to -40°C to 105°C, providing improved thermal performance. However, both Rohm devices specify a minimum supply voltage of 5 V, which restricts their use in applications requiring operation below 5 V. These parts are suitable for applications where higher slew rate and bandwidth are beneficial and supply voltage remains at or above 5 V.

Group 2: General-Purpose Amplifiers with Enhanced Performance

The TLV2372IDGK and TLV2372IDGKR from Texas Instruments offer general-purpose dual-channel amplifiers with significantly higher slew rate (2.1 V/µs) and gain-bandwidth product (3 MHz). These parts maintain the full operating temperature range of -40°C to 125°C and support the complete supply voltage range of 2.7 V to 16 V, providing direct compatibility with the AD8546ARMZ-RL supply specifications. The TLV2372 series is suitable for applications requiring improved dynamic response and higher bandwidth performance.

Group 3: Ultra-Low-Power Amplifiers

The TLV2402 series (CDGK, IDGK, IDGKR, and QDGKRQ1 variants) from Texas Instruments provides ultra-low-power dual-channel amplifiers with supply current of 900 nA per channel. These parts are designed for battery-powered and energy-constrained applications. The TLV2402QDGKRQ1 variant includes automotive-grade qualification (AEC-Q100) and is packaged in Tape & Reel format. The TLV2402CDGK operates over a restricted temperature range of 0°C to 70°C, limiting its use to commercial-grade applications. The TLV2402IDGK and TLV2402IDGKR variants support the full industrial temperature range of -40°C to 125°C. All TLV2402 variants exhibit significantly lower slew rate (0.0025 V/µs) and gain-bandwidth product (5.5 kHz), making them suitable only for low-frequency signal conditioning applications.

Compliance and Certification:

All substitute parts maintain active product status and RoHS3 compliance. The TLV2402QDGKRQ1 includes AEC-Q100 automotive qualification, suitable for automotive applications requiring enhanced reliability standards. Moisture sensitivity levels are consistent across all parts at MSL 1 (unlimited) except for the TLV2402QDGKRQ1, which specifies MSL 2 (1 Year).

Frequently Asked Questions (FAQ)

Q: Can the BD7562FVM-TR or BD7562SFVM-TR be used as direct replacements for the AD8546ARMZ-RL?

A: The Rohm BD7562 devices are functionally compatible as dual-channel rail-to-rail amplifiers in 8-MSOP packages. However, they require a minimum supply voltage of 5 V, whereas the AD8546ARMZ-RL operates from 2.7 V. If your application uses supply voltages below 5 V, the BD7562 series cannot be substituted. Additionally, the BD7562FVM-TR is limited to -40°C to 85°C operation, which is narrower than the AD8546ARMZ-RL specification.

Q: What is the difference between the TLV2372 and TLV2402 series?

A: The TLV2372 series is a general-purpose amplifier with higher performance specifications: slew rate of 2.1 V/µs and gain-bandwidth product of 3 MHz. The TLV2402 series is an ultra-low-power amplifier with slew rate of 0.0025 V/µs and gain-bandwidth product of 5.5 kHz. The TLV2402 is designed for low-frequency, battery-powered applications where power consumption is critical. The TLV2372 is suitable for applications requiring higher bandwidth and faster signal response.

Q: Are there packaging differences between the substitute parts?

A: Yes. The AD8546ARMZ-RL is supplied in Tape & Reel (TR) format. Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel®, Tube, and Tape & Reel (TR). All parts use the same 8-MSOP or 8-VSSOP surface-mount package footprint, so PCB layout compatibility is maintained. Packaging format selection depends on your procurement and assembly requirements.

Q: Which substitute part has the widest operating temperature range?

A: The TLV2372IDGK, TLV2372IDGKR, TLV2402IDGK, TLV2402IDGKR, and TLV2402QDGKRQ1 all support the full -40°C to 125°C operating temperature range, matching the AD8546ARMZ-RL specification. The BD7562FVM-TR is limited to -40°C to 85°C, and the BD7562SFVM-TR extends to -40°C to 105°C. The TLV2402CDGK is restricted to 0°C to 70°C commercial operation.

Q: Can I use the TLV2402 series in high-frequency applications?

A: No. The TLV2402 series has a gain-bandwidth product of only 5.5 kHz, making it unsuitable for high-frequency signal conditioning. It is designed exclusively for low-frequency, DC-coupled, and ultra-low-power applications. For applications requiring bandwidth above 200 kHz, use the TLV2372 series (3 MHz bandwidth) or the BD7562 series (1 MHz bandwidth).

Q: What is the significance of the TLV2402QDGKRQ1 automotive qualification?

A: The TLV2402QDGKRQ1 includes AEC-Q100 automotive-grade qualification, indicating compliance with automotive reliability and testing standards. This variant is suitable for automotive applications requiring enhanced quality assurance. The MSL rating of 2 (1 Year) indicates a one-year shelf life requirement for moisture-sensitive handling, compared to unlimited shelf life (MSL 1) for other variants.

Q: What is the minimum supply voltage for each substitute part?

A: The AD8546ARMZ-RL operates from 2.7 V minimum. Substitute parts with the same 2.7 V minimum are: TLV2372IDGK, TLV2372IDGKR, and TLV2402 series (2.5 V minimum). The BD7562 series requires a minimum of 5 V, restricting their use in low-voltage applications.

Q: How do input bias currents compare across substitute parts?

A: The AD8546ARMZ-RL specifies 5 pA input bias current. The BD7562 series and TLV2372 series offer lower input bias current of 1 pA. The TLV2402 series specifies 100 pA input bias current, which is significantly higher. For applications sensitive to input bias current effects, the BD7562 or TLV2372 series are preferred.

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