TLE2037MDG4 Equivalent & Substitute Parts

Part Overview

The TLE2037MDG4 is a general-purpose operational amplifier manufactured by Texas Instruments in the Excalibur™ series. This device is packaged in 8-SOIC surface mount configuration and features a 50 MHz gain bandwidth product with low input offset voltage of 20 µV. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for existing designs.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	7.5	V/µs
Gain Bandwidth Product	50	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	20	µV
Current - Supply	3.8	mA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	8	V
Voltage - Supply Span (Max)	38	V
Operating Temperature	-55 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TLE2037MDG4 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Package type: 8-SOIC surface mount configuration
Gain bandwidth product: 50 MHz
Number of circuits: 1
Output current capability: 50 mA minimum
Supply voltage range compatibility: minimum 8 V to maximum 38 V overlap
Input offset voltage: 20 µV or lower
Input bias current: 15 nA or lower
Operating temperature range: must support -55°C to 125°C or equivalent industrial range

Substitution Categories:

Category 1: Direct Texas Instruments Equivalent TLE2037MD represents the same base product with identical electrical specifications but different packaging (Tube vs. MDG4 variant). This part maintains all electrical parameters and is in Last Time Buy status.

Category 2: Analog Devices AD817 Series AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7 are general-purpose amplifiers with 50 MHz gain bandwidth product and 8-SOIC packaging. These parts feature higher slew rate (350 V/µs) and are in Active product status. Supply voltage range is 5 V to 36 V, which overlaps the TLE2037MDG4 specification.

Category 3: Analog Devices LT Series Alternatives LT1028CS8#PBF, LT1220CS8#PBF, LT1220CS8#TRPBF, LT1224CS8#PBF, and LT1224CS8#TRPBF are general-purpose amplifiers in 8-SOIC packaging with 45 MHz to 75 MHz gain bandwidth products. These parts are in Active status and provide alternative performance characteristics within the operational envelope.

Category 4: Voltage Feedback Alternative LT1360CS8#PBF is a voltage feedback amplifier with 50 MHz gain bandwidth product, 8-SOIC packaging, and Active status. This part features higher slew rate (800 V/µs) and lower supply current (4 mA).

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
TLE2037MDG4	Texas Instruments	7.5	50	15	20	3.8	50	8	38	-55 to 125	8-SOIC	Discontinued
TLE2037MD	Texas Instruments	7.5	50	15	20	3.8	50	8	38	-55 to 125	8-SOIC	Last Time Buy
AD817ARZ	Analog Devices	350	50	3300	500	7	50	5	36	-45 to 85	8-SOIC	Active
AD817ARZ-REEL	Analog Devices	350	50	3300	500	7	50	5	36	-40 to 85	8-SOIC	Active
AD817ARZ-REEL7	Analog Devices	350	50	3300	500	7	50	5	36	-40 to 85	8-SOIC	Active
LT1028CS8#PBF	Analog Devices	15	75	30	20	7.6	—	8	36	0 to 70	8-SOIC	Active
LT1220CS8#PBF	Analog Devices	250	45	100	500	8	26	10	30	0 to 70	8-SOIC	Active
LT1220CS8#TRPBF	Analog Devices	250	45	100	500	8	26	10	30	0 to 70	8-SOIC	Active
LT1224CS8#PBF	Analog Devices	400	45	4000	500	7	—	5	30	0 to 70	8-SOIC	Active
LT1224CS8#TRPBF	Analog Devices	400	45	4000	500	7	—	5	30	0 to 70	8-SOIC	Active
LT1360CS8#PBF	Analog Devices	800	50	300	300	4	34	5	30	0 to 70	8-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: TLE2037MD

The TLE2037MD is the direct equivalent of the TLE2037MDG4, offering identical electrical specifications and 8-SOIC packaging. Although in Last Time Buy status, this part provides the most direct substitution path with no design modifications required. Both parts are ROHS3 compliant and maintain the same operating temperature range (-55°C to 125°C), supply voltage range (8 V to 38 V), and all critical electrical parameters.

Secondary Recommendation: AD817ARZ-REEL or AD817ARZ-REEL7

The AD817ARZ series from Analog Devices provides Active product status with identical 50 MHz gain bandwidth product and 8-SOIC packaging. These parts feature significantly higher slew rate (350 V/µs) and are suitable for applications requiring faster transient response. The supply voltage range (5 V to 36 V) overlaps the TLE2037MDG4 specification. Operating temperature range is -40°C to -45°C to 85°C, which covers most industrial applications but does not extend to the full -55°C lower limit of the original part. Both variants are ROHS3 compliant with MSL 1 rating.

Tertiary Recommendation: LT1360CS8#PBF

The LT1360CS8#PBF is a voltage feedback amplifier with 50 MHz gain bandwidth product, 8-SOIC packaging, and Active status. This part offers the highest slew rate (800 V/µs) among substitutes and lowest supply current (4 mA). The supply voltage range (5 V to 30 V) is narrower than the original part. Operating temperature range is 0°C to 70°C, limiting use in extended temperature applications. ROHS3 compliant with MSL 1 rating.

Alternative Consideration: LT1028CS8#PBF

The LT1028CS8#PBF provides higher gain bandwidth product (75 MHz) with input offset voltage matching the original part (20 µV). Supply voltage range (8 V to 36 V) closely aligns with TLE2037MDG4. Operating temperature range is 0°C to 70°C. ROHS3 compliant with MSL 1 rating. Suitable for applications not requiring extended low-temperature operation.

Not Recommended for Direct Substitution: LT1220 and LT1224 Series

The LT1220CS8 and LT1224CS8 parts feature lower gain bandwidth product (45 MHz) compared to the 50 MHz specification of the TLE2037MDG4. The LT1220 series has reduced output current capability (26 mA vs. 50 mA) and narrower supply voltage range (10 V to 30 V). These parts are suitable only for applications where the lower bandwidth and output current are acceptable.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLE2037MDG4 with TLE2037MD?

A: Yes. The TLE2037MD is the direct equivalent with identical electrical specifications, 8-SOIC packaging, and operating temperature range. The only difference is packaging format (Tube vs. MDG4 variant). No circuit modifications are required.

Q: What is the key difference between TLE2037MDG4 and AD817ARZ-REEL?

A: Both parts have 50 MHz gain bandwidth product and 8-SOIC packaging. The primary differences are: (1) AD817ARZ-REEL has significantly higher slew rate (350 V/µs vs. 7.5 V/µs), (2) higher input bias current (3.3 µA vs. 15 nA), (3) higher input offset voltage (500 µV vs. 20 µV), (4) narrower supply voltage range (5 V to 36 V vs. 8 V to 38 V), and (5) narrower operating temperature range (-40°C to 85°C vs. -55°C to 125°C). The AD817ARZ-REEL is suitable for applications requiring faster slew rate but not for designs requiring the full temperature range or low input offset voltage of the original part.

Q: Is the 8-SOIC package the same across all substitute parts?

A: Yes. All substitute parts listed use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and PCB layout compatibility with the TLE2037MDG4. Pin configuration and footprint are identical.

Q: Why does LT1360CS8#PBF have lower supply current than TLE2037MDG4?

A: The LT1360CS8#PBF is a voltage feedback amplifier architecture with optimized power consumption (4 mA vs. 3.8 mA). While the supply current is comparable, the LT1360 achieves higher slew rate (800 V/µs) through different circuit topology. This part is suitable for power-sensitive applications.

Q: Can I use LT1220CS8 or LT1224CS8 as substitutes?

A: These parts are not recommended as direct substitutes due to lower gain bandwidth product (45 MHz vs. 50 MHz). The LT1220 also has reduced output current (26 mA vs. 50 mA) and narrower supply voltage range (10 V to 30 V). Use these parts only if your application specifications allow for lower bandwidth and output current.

Q: What is the difference between AD817ARZ, AD817ARZ-REEL, and AD817ARZ-REEL7?

A: All three variants have identical electrical specifications and 50 MHz gain bandwidth product. The differences are in packaging format: AD817ARZ is supplied in Tube, while AD817ARZ-REEL and AD817ARZ-REEL7 are supplied in Cut Tape (CT) & Digi-Reel® format. The operating temperature range for AD817ARZ is -45°C to 85°C, while AD817ARZ-REEL and AD817ARZ-REEL7 are -40°C to 85°C. Select based on your procurement and assembly requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the environmental compliance of the TLE2037MDG4.

Q: Which substitute part best matches the original TLE2037MDG4 specifications?

A: The TLE2037MD provides the closest match with identical electrical specifications and operating temperature range. For Active product status alternatives, the LT1028CS8#PBF offers the closest electrical match with 75 MHz gain bandwidth product, 20 µV input offset voltage, and 8 V to 36 V supply range, though it has a narrower operating temperature range (0°C to 70°C).

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