MCP6H91T-E/SN Equivalent & Substitute Parts

Part Overview

The MCP6H91T-E/SN is a general purpose operational amplifier manufactured by Microchip Technology, configured as a single-circuit rail-to-rail amplifier in an 8-SOIC surface mount package. This device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance parameters and mechanical compatibility are maintained within the specified operating ranges. The MCP6H91T-E/SN serves applications requiring general purpose amplification with rail-to-rail output capability across supply voltages from 3.5 V to 12 V and operating temperatures from -40°C to 125°C.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	10	V/µs
Gain Bandwidth Product	10	MHz
Current - Input Bias	10	pA
Voltage - Input Offset	1	mV
Current - Supply	2	mA
Current - Output / Channel	41	mA
Voltage - Supply Span (Min)	3.5	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MCP6H91T-E/SN are identified based on the following critical parameters that determine functional and mechanical compatibility:

Primary Substitution Criteria:

Amplifier Type: General Purpose or Programmable Gain
Number of Circuits: 1 circuit configuration
Output Type: Rail-to-Rail output capability
Package Compatibility: 8-SOIC or equivalent 8-pin surface mount packages
Supply Voltage Range: Minimum 3.5 V to maximum 12 V overlap
Operating Temperature Range: Support for -40°C to 125°C or subset thereof
RoHS3 Compliance: Required for regulatory equivalence
Moisture Sensitivity: MSL 1 preferred for handling compatibility

Substitution Groups:

Group 1: LTC6240 Series (Analog Devices Inc.) General purpose amplifiers with enhanced specifications. All variants maintain 8-SO package compatibility, rail-to-rail output, and RoHS3 compliance. Supply voltage range 2.8 V to 11 V overlaps with MCP6H91T-E/SN requirements. Temperature variants available for different operating ranges.

Group 2: LTC6910 Series (Analog Devices Inc.) Programmable gain amplifiers with enhanced slew rate (16 V/µs) and gain bandwidth product (11-13 MHz). Package differs to SOT-23-8 (TSOT-23-8). Supply voltage range 2.7 V to 10.5 V. Temperature variants support -40°C to 125°C operation.

Group 3: OPA725 Series (Texas Instruments) General purpose amplifiers with enhanced slew rate (30 V/µs) and gain bandwidth product (20 MHz). 8-SOIC package maintains mechanical compatibility. Supply voltage range 4 V to 12 V. Full temperature range -40°C to 125°C support.

Parameter Comparison

Parameter	MCP6H91T-E/SN	LTC6240HVCS8#PBF	LTC6240HVHS8#PBF	LTC6240HVIS8#PBF	LTC6240HVIS8#TRPBF	LTC6910-1CTS8#TRMPBF	LTC6910-1HTS8#TRMPBF	LTC6910-2HTS8#TRMPBF	LTC6910-3HTS8#TRPBF	OPA725AID	OPA725AIDR
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	Programmable Gain	Programmable Gain	Programmable Gain	Programmable Gain	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1	1	1	1	1
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	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	10	10	10	10	10	16	16	16	16	30	30
Gain Bandwidth Product (MHz)	10	18	18	18	18	11	11	13	11	20	20
Current - Supply (mA)	2	2.7	2.7	2.7	2.7	3.5	3.5	3.5	3.5	4.3	4.3
Current - Output / Channel (mA)	41	35	35	35	35	35	35	—	35	40	40
Voltage - Supply Span Min (V)	3.5	2.8	2.8	2.8	2.8	2.7	2.7	2.7	2.7	4	4
Voltage - Supply Span Max (V)	12	11	11	11	11	10.5	10.5	10.5	10.5	12	12
Operating Temperature (°C)	-40 to 125	0 to 70	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 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
Package / Case	8-SOIC	8-SO	8-SO	8-SO	8-SO	SOT-23-8	SOT-23-8	SOT-23-8	SOT-23-8	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

Direct Package Compatibility (8-SOIC):

OPA725AID and OPA725AIDR maintain identical 8-SOIC package geometry to the MCP6H91T-E/SN. Both devices are Active product status with RoHS3 compliance. OPA725AIDR is supplied in Tape & Reel packaging, matching the MCP6H91T-E/SN format. Both support the full -40°C to 125°C operating temperature range and 4 V to 12 V supply voltage span, with supply voltage minimum of 4 V requiring circuit design consideration for 3.5 V minimum applications.

Enhanced Performance with Package Transition (8-SO):

LTC6240HVHS8#PBF and LTC6240HVIS8#TRPBF provide enhanced gain bandwidth product (18 MHz versus 10 MHz) and improved input bias current (0.5 pA versus 10 pA). LTC6240HVHS8#PBF supports full -40°C to 125°C temperature range. LTC6240HVIS8#TRPBF operates to -40°C to 85°C. Both use 8-SO package (mechanically compatible with 8-SOIC footprints in most applications). Supply voltage range 2.8 V to 11 V accommodates MCP6H91T-E/SN specifications. All variants maintain RoHS3 compliance and MSL 1 rating.

Programmable Gain Alternative (SOT-23-8):

LTC6910-1HTS8#TRMPBF and LTC6910-3HTS8#TRPBF offer programmable gain functionality with enhanced slew rate (16 V/µs) and support full -40°C to 125°C temperature range. Package transition to SOT-23-8 (TSOT-23-8) requires PCB layout modification. Supply voltage range 2.7 V to 10.5 V overlaps MCP6H91T-E/SN requirements. Both maintain RoHS3 compliance and MSL 1 rating. LTC6910-1CTS8#TRMPBF operates to -40°C to 85°C with identical electrical specifications.

Product Status and Compliance:

All substitute parts maintain Active product status classification. RoHS3 compliance is universal across all alternatives. Moisture sensitivity rating MSL 1 is maintained by all Analog Devices parts (LTC6240 and LTC6910 series), while Texas Instruments OPA725 variants specify MSL 2 (1 Year), requiring controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can OPA725AID directly replace MCP6H91T-E/SN without PCB modification?

A: OPA725AID maintains identical 8-SOIC package geometry and pinout compatibility. However, the minimum supply voltage specification differs: OPA725AID requires minimum 4 V while MCP6H91T-E/SN operates from 3.5 V minimum. Circuit designs operating below 4 V supply voltage cannot use OPA725AID as a direct substitute.

Q: What is the difference between LTC6240HVHS8#PBF and LTC6240HVIS8#TRPBF?

A: Both use identical 8-SO package and electrical specifications. Primary differences are packaging format (Tube versus Tape & Reel) and operating temperature range. LTC6240HVHS8#PBF supports -40°C to 125°C; LTC6240HVIS8#TRPBF supports -40°C to 85°C. Select based on application temperature requirements and procurement packaging preference.

Q: Are LTC6910 programmable gain amplifiers functionally equivalent to MCP6H91T-E/SN?

A: LTC6910 series provides programmable gain functionality not present in MCP6H91T-E/SN general purpose configuration. Electrical parameters including slew rate (16 V/µs), gain bandwidth product (11-13 MHz), and supply current (3.5 mA) differ from MCP6H91T-E/SN. Package format changes from 8-SOIC to SOT-23-8. Use LTC6910 only when programmable gain feature is required and PCB layout can accommodate package change.

Q: What packaging format should be selected for high-volume production?

A: Tape & Reel (TR) packaging is standard for automated assembly. MCP6H91T-E/SN is supplied as Tape & Reel. Equivalent Tape & Reel options include OPA725AIDR, LTC6240HVIS8#TRPBF, and all LTC6910 variants with #TRMPBF or #TRPBF designations. Tube packaging (LTC6240HVCS8#PBF, OPA725AID) is suitable for manual assembly or lower-volume applications.

Q: How does moisture sensitivity level affect component handling?

A: MCP6H91T-E/SN specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. All Analog Devices substitute parts (LTC6240 and LTC6910 series) maintain MSL 1 rating. Texas Instruments OPA725 variants specify MSL 2 (1 Year), requiring storage in dry conditions and baking before reflow soldering if shelf life exceeds one year. For applications with extended storage or humid environments, Analog Devices alternatives are preferred.

Q: Can supply voltage range differences affect circuit operation?

A: MCP6H91T-E/SN operates 3.5 V to 12 V. LTC6240 series operates 2.8 V to 11 V (lower minimum, lower maximum). LTC6910 series operates 2.7 V to 10.5 V (lower minimum, lower maximum). OPA725 series operates 4 V to 12 V (higher minimum, same maximum). Circuits designed for 3.5 V to 11 V operation are compatible with all alternatives. Circuits requiring 3.5 V minimum cannot use OPA725. Circuits requiring 11 V to 12 V maximum cannot use LTC6240 or LTC6910 series.

Q: What are the input bias current implications for circuit design?

A: MCP6H91T-E/SN specifies 10 pA input bias current. LTC6240 series specifies 0.5 pA (20× lower), reducing input offset drift and improving precision applications. LTC6910 series does not specify input bias current in provided data. OPA725 series specifies 30 pA (3× higher), increasing input offset drift. For precision instrumentation, LTC6240 series provides superior input bias current performance.

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