LT1001CS8 Equivalent & Substitute Parts

Part Overview

The LT1001CS8 is a general-purpose operational amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface mount package. This single-circuit amplifier is designed for applications requiring low input bias current and low input offset voltage characteristics. The part is currently in active production status with 1444 units in stock. Equivalent and substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and compliance certifications to support component procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	0.25	V/µs
Gain Bandwidth Product	800	kHz
Current - Input Bias	700	pA
Voltage - Input Offset	18	µV
Voltage - Supply Span (Min)	6	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	0 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 LT1001CS8 are grouped into two categories based on electrical and mechanical compatibility:

Direct Equivalent (Packaging Variant): The LT1001CS8#PBF is an identical electrical specification part with tube packaging instead of standard packaging. This part maintains all electrical parameters and is suitable for direct substitution where packaging format permits.

Functional Equivalents (OP177 Series): The OP177FSZ, OP177FSZ-REEL, OP177FSZ-REEL7, OP177GSZ, OP177GSZ-REEL, and OP177GSZ-REEL7 are functional equivalents manufactured by Analog Devices Inc. These parts share the same 8-SOIC package footprint, supply voltage range (6V to 36V), and general-purpose amplifier classification. Differences exist in slew rate (0.3V/µs versus 0.25V/µs), gain bandwidth product (600 kHz versus 800 kHz), input bias current (1.2 nA versus 700 pA), and operating temperature range (-40°C to 85°C versus 0°C to 125°C). These parameters determine suitability for specific applications.

Cross-Manufacturer Alternatives (OP07 Series): The OP07CD, OP07CDR, and OP07DD are manufactured by Texas Instruments and provide functional substitution with identical package and supply voltage specifications. These parts exhibit higher input offset voltage (60 µV versus 18 µV) and input bias current (1.8 to 2 nA versus 700 pA), with a narrower operating temperature range (0°C to 70°C versus 0°C to 125°C).

Substitution eligibility is determined by matching the following critical parameters: package type (8-SOIC), supply voltage range (minimum 6V, maximum 36V), mounting type (surface mount), and compliance certifications (ROHS3, MSL 1).

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA/nA)	Input Offset (µV)	Temp Range (°C)	Package	Status
LT1001CS8	Analog Devices	0.25	800	700 pA	18	0 to 125	8-SOIC	Active
LT1001CS8#PBF	Analog Devices	0.25	800	700 pA	18	0 to 125	8-SOIC	Active
OP177FSZ	Analog Devices	0.3	600	1.2 nA	10	-40 to 85	8-SOIC	Active
OP177FSZ-REEL	Analog Devices	0.3	600	1.2 nA	10	-40 to 85	8-SOIC	Active
OP177FSZ-REEL7	Analog Devices	0.3	600	1.2 nA	10	-40 to 85	8-SOIC	Active
OP177GSZ	Analog Devices	0.3	600	1.2 nA	20	-40 to 85	8-SOIC	Active
OP177GSZ-REEL	Analog Devices	0.3	600	1.2 nA	20	-40 to 85	8-SOIC	Active
OP177GSZ-REEL7	Analog Devices	0.3	600	1.2 nA	20	-40 to 85	8-SOIC	Active
OP07CD	Texas Instruments	0.3	600	1.8 nA	60	0 to 70	8-SOIC	Last Time Buy
OP07CDR	Texas Instruments	0.3	600	1.8 nA	60	0 to 70	8-SOIC	Active
OP07DD	Texas Instruments	0.3	600	2 nA	60	0 to 70	8-SOIC	Active

Engineering Selection Recommendations

Direct Substitution (Identical Electrical Performance): The LT1001CS8#PBF is a direct electrical equivalent with identical specifications. Selection between LT1001CS8 and LT1001CS8#PBF depends solely on packaging format requirements (tube versus standard packaging). Both parts maintain ROHS3 compliance and MSL 1 rating.

Functional Substitution with Parameter Trade-offs: The OP177 series (all variants) provides functional substitution with the following considerations:

Slew rate increases from 0.25V/µs to 0.3V/µs, suitable for applications tolerating faster transient response
Gain bandwidth product decreases from 800 kHz to 600 kHz, acceptable for lower-frequency applications
Input bias current increases from 700 pA to 1.2 nA, affecting high-impedance input circuits
Input offset voltage varies between 10 µV (OP177F variants) and 20 µV (OP177G variants), compared to 18 µV for LT1001CS8
Operating temperature range narrows to -40°C to 85°C, suitable for standard industrial applications but not extended temperature requirements

All OP177 variants maintain ROHS3 compliance, MSL 1 rating, and 8-SOIC package compatibility. OP177FSZ-REEL7 and OP177GSZ-REEL7 offer highest inventory availability (16,400 and 24,870 units respectively).

Cross-Manufacturer Substitution (OP07 Series): The OP07 series from Texas Instruments provides mechanical and supply voltage compatibility but with significant electrical trade-offs:

Input offset voltage increases to 60 µV (3.3 times higher than LT1001CS8)
Input bias current increases to 1.8–2 nA (2.6 to 2.9 times higher than LT1001CS8)
Operating temperature range limits to 0°C to 70°C, restricting use in extended temperature applications
OP07CD is designated Last Time Buy status, indicating discontinued production

OP07CDR (Active status, 220,100 units in stock) is the preferred OP07 variant if cross-manufacturer substitution is required. All OP07 parts maintain ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can LT1001CS8#PBF be used as a direct replacement for LT1001CS8?

A: Yes. LT1001CS8#PBF is electrically identical to LT1001CS8, with the only difference being packaging format (tube versus standard). Both parts share identical electrical specifications, compliance certifications, and 8-SOIC package footprint. Selection depends on packaging requirements for assembly processes.

Q: What are the key differences between LT1001CS8 and OP177 series substitutes?

A: The primary differences are slew rate (0.25V/µs versus 0.3V/µs), gain bandwidth product (800 kHz versus 600 kHz), input bias current (700 pA versus 1.2 nA), and operating temperature range (0°C to 125°C versus -40°C to 85°C). These differences affect circuit performance in high-frequency applications and high-impedance input stages. OP177 variants are suitable for applications where the LT1001CS8's extended temperature range is not required.

Q: Why do OP177F and OP177G variants have different input offset voltages?

A: OP177F variants (OP177FSZ, OP177FSZ-REEL, OP177FSZ-REEL7) specify 10 µV input offset voltage, while OP177G variants (OP177GSZ, OP177GSZ-REEL, OP177GSZ-REEL7) specify 20 µV. Both remain within acceptable tolerance for general-purpose amplifier applications. Selection depends on circuit precision requirements. OP177G variants offer higher inventory availability.

Q: Is the OP07 series suitable as a substitute for LT1001CS8?

A: The OP07 series provides mechanical and supply voltage compatibility but exhibits significantly higher input offset voltage (60 µV) and input bias current (1.8–2 nA) compared to LT1001CS8 (18 µV and 700 pA respectively). OP07 substitution is limited to applications where these electrical trade-offs are acceptable. OP07CD is Last Time Buy status; OP07CDR is the active alternative.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in 8-SOIC surface mount package, maintaining mechanical compatibility with LT1001CS8. Packaging format variants include tube (standard), Cut Tape (CT), and Digi-Reel® options. Selection depends on assembly process requirements and volume handling.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (LT1001CS8#PBF, OP177 series, and OP07 series) maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental standards.

Q: Which substitute part offers the best inventory availability?

A: OP177GSZ-REEL7 offers the highest inventory availability with 24,870 units in stock, followed by OP177GSZ-REEL with 25,100 units. These variants provide functional substitution with active production status and extended lead-time security.

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