OPA37GP Equivalent & Substitute Parts

Part Overview

The OPA37GP is a general-purpose operational amplifier manufactured by Texas Instruments in 8-DIP through-hole packaging. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory (4735 pcs). The OPA37GP delivers 63 MHz gain-bandwidth product with 11.9 V/µs slew rate, suitable for general-purpose amplification applications requiring moderate speed and precision. Finding equivalent and substitute parts is necessary due to the Last Time Buy status and to support design flexibility across different packaging technologies and manufacturing sources.

Key Parameters

Parameter	OPA37GP
Amplifier Type	General Purpose
Number of Circuits	1
Slew Rate	11.9 V/µs
Gain Bandwidth Product	63 MHz
Current - Input Bias	15 nA
Voltage - Input Offset	25 µV
Current - Supply	3.3 mA
Current - Output / Channel	25 mA
Voltage - Supply Span (Min)	8 V
Voltage - Supply Span (Max)	44 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the OPA37GP is determined by the following critical parameters: amplifier type (general purpose), number of circuits (1), operating temperature range (-40°C ~ 85°C), and supply voltage span compatibility. The substitute parts are grouped into two categories based on packaging and performance characteristics:

Category 1: Direct Functional Equivalents (Through-Hole 8-DIP) Parts OP37GPZ and LT1037IN8#PBF maintain identical through-hole 8-DIP packaging and general-purpose amplifier classification. These parts preserve PCB layout compatibility and mounting methodology.

Category 2: Surface-Mount Alternative (8-SOIC) Part OPA37GU/2K5 provides identical electrical performance in surface-mount 8-SOIC packaging, enabling modern manufacturing processes while maintaining the same base product series (OPA37).

Category 3: Functional Variants Parts AD620ANZ (instrumentation amplifier) and LT1360CN8#PBF (voltage feedback amplifier) represent different amplifier topologies with modified electrical characteristics. These are included as substitutes only where application requirements permit topology changes.

Parameter Comparison

Parameter	OPA37GP	OP37GPZ	OPA37GU/2K5	LT1037IN8#PBF	LT1360CN8#PBF	AD620ANZ
Manufacturer	Texas Instruments	Analog Devices Inc.	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	Voltage Feedback	Instrumentation
Number of Circuits	1	1	1	1	1	1
Slew Rate	11.9 V/µs	17 V/µs	11.9 V/µs	15 V/µs	800 V/µs	1.2 V/µs
Gain Bandwidth Product	63 MHz	63 MHz	63 MHz	60 MHz	50 MHz	1 MHz
Current - Input Bias	15 nA	15 nA	15 nA	15 nA	300 nA	500 pA
Voltage - Input Offset	25 µV	30 µV	25 µV	20 µV	300 µV	30 µV
Current - Supply	3.3 mA	Not Specified	3.3 mA	Not Specified	4 mA	900 µA
Current - Output / Channel	25 mA	Not Specified	25 mA	Not Specified	34 mA	18 mA
Voltage - Supply Span (Min)	8 V	8 V	8 V	8 V	5 V	4.6 V
Voltage - Supply Span (Max)	44 V	36 V	44 V	36 V	30 V	36 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Product Status	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	4735 pcs	4336 pcs	1915 pcs	710 pcs	1147 pcs	29249 pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Topology and Packaging): OP37GPZ is the primary substitute for OPA37GP when through-hole 8-DIP packaging is required. Both parts maintain general-purpose amplifier classification, identical gain-bandwidth product (63 MHz), and matching operating temperature range (-40°C ~ 85°C). OP37GPZ is manufactured by Analog Devices Inc. with Active product status and ROHS3 compliance. The maximum supply voltage span is reduced from 44 V to 36 V; applications requiring voltages above 36 V must retain OPA37GP or OPA37GU/2K5.

For Surface-Mount Implementation: OPA37GU/2K5 provides identical electrical performance to OPA37GP in 8-SOIC surface-mount packaging. This part is recommended for new designs or manufacturing transitions to surface-mount assembly. Electrical parameters are identical: 63 MHz gain-bandwidth product, 11.9 V/µs slew rate, 3.3 mA supply current, and 25 mA output current. OPA37GU/2K5 maintains the full 8 V to 44 V supply span and -40°C ~ 85°C operating temperature. Moisture sensitivity level is MSL 3 (168 hours); storage and handling procedures must account for this classification.

For High-Speed Applications: LT1037IN8#PBF offers improved slew rate (15 V/µs versus 11.9 V/µs) while maintaining 60 MHz gain-bandwidth product and general-purpose amplifier topology. This part is suitable when faster transient response is required. Maximum supply voltage is limited to 36 V. Operating temperature range matches OPA37GP (-40°C ~ 85°C). LT1037IN8#PBF is manufactured by Analog Devices Inc. with Active product status.

For Ultra-High-Speed Applications: LT1360CN8#PBF is a voltage feedback amplifier with 800 V/µs slew rate and 50 MHz gain-bandwidth product. This part is appropriate only for applications requiring extreme slew rate performance. Operating temperature range is restricted to 0°C ~ 70°C (narrower than OPA37GP). Maximum supply voltage is 30 V. Input bias current is elevated to 300 nA, and input offset voltage is 300 µV. Substitution requires verification that the narrower temperature range and modified electrical characteristics are acceptable.

For Instrumentation Applications: AD620ANZ is an instrumentation amplifier topology with 1 MHz bandwidth and 500 pA input bias current. This part is appropriate only when instrumentation amplifier functionality is required. Slew rate is reduced to 1.2 V/µs. Supply current is significantly lower at 900 µA. Substitution requires confirmation that the instrumentation topology and reduced bandwidth are compatible with application requirements.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the OPA37GP certification profile. All parts are classified under ECCN EAR99 and HTSUS 8542.33.0001.

Frequently Asked Questions (FAQ)

Q: Can OPA37GU/2K5 replace OPA37GP in existing PCB designs? A: No. OPA37GU/2K5 uses 8-SOIC surface-mount packaging while OPA37GP uses 8-DIP through-hole packaging. PCB layout and footprint modifications are required. OPA37GU/2K5 is suitable for new designs or PCB redesigns targeting surface-mount assembly.

Q: What is the primary reason to substitute OPA37GP? A: OPA37GP is classified as Last Time Buy with discontinued production. Substitute parts with Active product status (OP37GPZ, OPA37GU/2K5, LT1037IN8#PBF, LT1360CN8#PBF, AD620ANZ) ensure long-term availability and supply chain continuity.

Q: Does OP37GPZ provide identical electrical performance to OPA37GP? A: OP37GPZ matches OPA37GP in gain-bandwidth product (63 MHz), slew rate (11.9 V/µs for OPA37GP versus 17 V/µs for OP37GPZ), input bias current (15 nA), and operating temperature range (-40°C ~ 85°C). Maximum supply voltage is reduced from 44 V to 36 V in OP37GPZ.

Q: Is OPA37GU/2K5 electrically identical to OPA37GP? A: Yes. OPA37GU/2K5 provides identical electrical specifications: 63 MHz gain-bandwidth product, 11.9 V/µs slew rate, 15 nA input bias current, 25 µV input offset voltage, 3.3 mA supply current, and 25 mA output current. The difference is packaging: 8-SOIC surface-mount versus 8-DIP through-hole.

Q: Can LT1360CN8#PBF be used as a direct replacement for OPA37GP? A: No. LT1360CN8#PBF is a voltage feedback amplifier with fundamentally different topology. Slew rate is 800 V/µs (versus 11.9 V/µs), gain-bandwidth product is 50 MHz (versus 63 MHz), and operating temperature range is 0°C ~ 70°C (versus -40°C ~ 85°C). Substitution requires application-level verification.

Q: What is the moisture sensitivity level (MSL) of OPA37GU/2K5? A: OPA37GU/2K5 has MSL 3 (168 hours). This indicates the part must be stored in controlled humidity conditions and used within 168 hours of exposure to ambient humidity above specified thresholds. OPA37GP has MSL Not Applicable, indicating no moisture sensitivity restrictions.

Q: Which substitute part has the highest inventory availability? A: AD620ANZ has the highest inventory with 29,249 pcs in stock. However, AD620ANZ is an instrumentation amplifier and is not a direct functional equivalent to OPA37GP. For direct general-purpose amplifier equivalents, OP37GPZ has 4,336 pcs available.

Q: Can AD620ANZ replace OPA37GP in general-purpose amplifier circuits? A: No. AD620ANZ is an instrumentation amplifier with different topology, reduced bandwidth (1 MHz versus 63 MHz), and significantly lower slew rate (1.2 V/µs versus 11.9 V/µs). Substitution is appropriate only for applications specifically requiring instrumentation amplifier functionality.

Q: What is the maximum supply voltage for each substitute part? A: OPA37GP: 44 V; OPA37GU/2K5: 44 V; OP37GPZ: 36 V; LT1037IN8#PBF: 36 V; LT1360CN8#PBF: 30 V; AD620ANZ: 36 V. Applications requiring supply voltages above 36 V must use OPA37GP or OPA37GU/2K5.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts (OP37GPZ, OPA37GU/2K5, LT1037IN8#PBF, LT1360CN8#PBF, AD620ANZ) are ROHS3 compliant, matching OPA37GP compliance status.

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