TLE2142IDRG4 Equivalent & Substitute Parts

Part Overview

The TLE2142IDRG4 is a general-purpose operational amplifier manufactured by Texas Instruments, featuring two circuits in an 8-SOIC surface-mount package. This device is designed for rail-to-rail output applications with a supply voltage range of 4 V to 44 V and operates across an extended temperature range of -40°C to 105°C. The TLE2142IDRG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLE2142IDRG4
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	2
Output Type	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	45 V/µs
Gain Bandwidth Product	5.9 MHz
Current - Input Bias	700 nA
Voltage - Input Offset	290 µV
Current - Supply	6.9 mA (x2 Channels)
Current - Output / Channel	50 mA
Voltage - Supply Span (Min)	4 V
Voltage - Supply Span (Max)	44 V
Operating Temperature	-40°C to 105°C
Product Status	Discontinued at DiGi Electronics
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TLE2142IDRG4 is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface-mount package to ensure direct PCB footprint compatibility.

Circuit Configuration: All substitutes must provide two operational amplifier circuits to match the dual-channel architecture of the original device.

Supply Voltage Range: Substitute parts must operate within overlapping supply voltage specifications. The TLE2142IDRG4 operates from 4 V to 44 V. Substitutes with minimum supply voltages of 8 V to 10 V and maximum ratings of 30 V to 36 V provide functional compatibility within typical application ranges, though designs requiring the full 4 V minimum or 44 V maximum of the original part may require circuit redesign.

Output Characteristics: The TLE2142IDRG4 features rail-to-rail output. Substitute parts without explicitly specified rail-to-rail output may have different output swing characteristics and require evaluation for specific applications.

Temperature Range: The TLE2142IDRG4 operates from -40°C to 105°C. Substitutes with -40°C to 125°C ratings provide extended high-temperature capability.

Amplifier Type: The original part is a general-purpose amplifier. J-FET amplifier substitutes offer superior input bias current characteristics but represent a different amplifier topology with distinct performance trade-offs.

Product Status: Active substitute parts ensure ongoing availability and manufacturing support, contrasting with the discontinued status of the original device.

Parameter Comparison

Parameter	TLE2142IDRG4	AD8512ARZ	AD8512ARZ-REEL	AD8512ARZ-REEL7	ADA4000-2ARZ	ADA4000-2ARZ-R7	ADA4000-2ARZ-RL	ADA4075-2ARZ	ADA4075-2ARZ-R7	ADA4075-2ARZ-RL	LT1057IS8#PBF
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	General Purpose	J-FET	J-FET	J-FET	J-FET	J-FET	J-FET	General Purpose	General Purpose	General Purpose	J-FET
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Slew Rate (V/µs)	45	20	20	20	20	20	20	12	12	12	13
Gain Bandwidth Product (MHz)	5.9	8	8	8	5	5	5	6.5	6.5	6.5	5
Current - Input Bias (nA/pA)	700 nA	25 pA	25 pA	25 pA	5 pA	5 pA	5 pA	30 nA	30 nA	30 nA	7 pA
Voltage - Input Offset (µV)	290	100	100	100	200	200	200	200	200	200	220
Current - Supply (mA, x2 Channels)	6.9	2.2	2.2	2.2	1.35	1.35	1.35	1.8	1.8	1.8	1.7
Current - Output / Channel (mA)	50	70	70	70	28	28	28	40	40	40	Not Specified
Voltage - Supply Span (Min)	4 V	10 V	10 V	10 V	8 V	8 V	8 V	9 V	9 V	9 V	20 V
Voltage - Supply Span (Max)	44 V	30 V	30 V	30 V	36 V	36 V	36 V	36 V	36 V	36 V	36 V
Operating Temperature	-40°C to 105°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 85°C
Product Status	Discontinued	Active	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	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

General Purpose Amplifier Substitutes (Recommended for Direct Replacement):

The ADA4075-2ARZ, ADA4075-2ARZ-R7, and ADA4075-2ARZ-RL represent the closest functional equivalents to the TLE2142IDRG4. These devices maintain the general-purpose amplifier topology and are available in active product status with ROHS3 compliance and unlimited moisture sensitivity rating. The ADA4075 series operates across -40°C to 125°C, providing extended high-temperature capability. Supply voltage range spans 9 V to 36 V, which covers most applications within the TLE2142IDRG4's operating envelope, though designs requiring operation below 9 V or above 36 V require circuit modification. The ADA4075 series exhibits lower input bias current (30 nA) and reduced supply current (1.8 mA per dual channels) compared to the original part, resulting in improved power efficiency. Slew rate of 12 V/µs and gain bandwidth product of 6.5 MHz provide adequate performance for general-purpose signal conditioning applications.

J-FET Amplifier Substitutes (Alternative Topology):

The AD8512ARZ, AD8512ARZ-REEL, and AD8512ARZ-REEL7 variants offer J-FET input architecture with superior input bias current characteristics (25 pA). These devices are active products with ROHS3 compliance. The AD8512 series operates from 10 V to 30 V, representing a narrower supply range than the original part. Gain bandwidth product of 8 MHz exceeds the TLE2142IDRG4 specification. Output current capability reaches 70 mA per channel, exceeding the original 50 mA specification. The J-FET topology introduces different input impedance and noise characteristics compared to the general-purpose amplifier architecture.

The ADA4000-2ARZ, ADA4000-2ARZ-R7, and ADA4000-2ARZ-RL variants provide J-FET input amplification with extremely low input bias current (5 pA). Supply voltage range spans 8 V to 36 V. These devices are active products with ROHS3 compliance and extended temperature operation to 125°C. Output current per channel is limited to 28 mA, below the original 50 mA specification, requiring evaluation for high-current output applications.

The LT1057IS8#PBF is a J-FET amplifier from the LT series with 7 pA input bias current and 13 V/µs slew rate. This device operates from 20 V to 36 V minimum supply voltage, restricting use in low-voltage applications. Operating temperature range extends only to 85°C, below the original -40°C to 105°C specification. This part is suitable for applications requiring high input impedance within the specified voltage and temperature constraints.

Packaging Considerations:

All substitute parts are available in 8-SOIC surface-mount package, ensuring direct PCB footprint compatibility. Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) affect procurement and assembly processes but do not alter electrical performance or pinout compatibility.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the original device's environmental and regulatory certifications. All parts carry EAR99 ECCN classification and HTSUS code 8542.33.0001, consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the ADA4075-2ARZ directly replace the TLE2142IDRG4 without circuit modification?

A: The ADA4075-2ARZ provides direct PCB footprint compatibility and maintains the general-purpose amplifier topology. However, the minimum supply voltage is 9 V compared to the original 4 V minimum. Applications operating below 9 V require circuit redesign. The maximum supply voltage of 36 V is below the original 44 V specification. Designs requiring operation at 44 V supply voltage require alternative approaches. Within the 9 V to 36 V range, the ADA4075-2ARZ functions as a direct replacement with improved power efficiency and lower input bias current.

Q: What is the primary difference between general-purpose and J-FET amplifier substitutes?

A: General-purpose amplifiers (ADA4075 series) use bipolar input stages, while J-FET amplifiers (AD8512, ADA4000, LT1057 series) use field-effect transistor input stages. J-FET amplifiers provide significantly lower input bias current (5 pA to 25 pA versus 30 nA to 700 nA), making them suitable for high-impedance signal sources. General-purpose amplifiers typically offer lower input offset voltage and simpler biasing requirements. The choice depends on application requirements for input impedance, offset voltage, and bias current characteristics.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts use the 8-SOIC surface-mount package, ensuring footprint compatibility. However, packaging variants differ: some are supplied in Tube format, others in Cut Tape & Digi-Reel, and some in Tape & Reel. These variants affect procurement quantities and assembly processes but do not alter electrical performance or pinout. Verify packaging availability with your component supplier based on assembly requirements.

Q: Which substitute part offers the lowest power consumption?

A: The ADA4000-2ARZ series exhibits the lowest supply current at 1.35 mA per dual channels, followed by the ADA4075 series at 1.8 mA. The original TLE2142IDRG4 draws 6.9 mA, making all listed substitutes significantly more power-efficient. The AD8512 series draws 2.2 mA, providing moderate power reduction. Selection should balance power consumption requirements with output current capability and supply voltage constraints.

Q: Can J-FET substitutes be used in applications originally designed for the TLE2142IDRG4?

A: J-FET substitutes are functionally compatible for most general-purpose applications but introduce different input impedance and bias current characteristics. Applications sensitive to input bias current (such as transimpedance amplifiers or precision instrumentation) benefit from J-FET topology. Applications requiring high output current or wide supply voltage range may be better served by general-purpose substitutes. Circuit simulation or prototype testing is appropriate when transitioning between amplifier topologies.

Q: What is the impact of the lower slew rate in substitute parts?

A: The TLE2142IDRG4 features 45 V/µs slew rate. Substitute parts range from 12 V/µs to 20 V/µs. Lower slew rate limits the maximum rate of output voltage change, affecting applications with high-frequency or high-amplitude signals. For audio-frequency and low-frequency signal conditioning, the reduced slew rate of substitute parts is typically not limiting. High-frequency applications (above 100 kHz) or applications requiring rapid transient response should evaluate slew rate specifications against circuit requirements.

Q: Are all substitute parts suitable for the full -40°C to 105°C temperature range of the original part?

A: Most substitute parts operate from -40°C to 125°C, exceeding the original specification. The LT1057IS8#PBF operates only to 85°C, below the original 105°C maximum. Applications requiring operation above 85°C should use ADA4075, AD8512, or ADA4000 series substitutes. Applications operating below 105°C can use any listed substitute.

Q: How do output current capabilities compare across substitute parts?

A: The TLE2142IDRG4 provides 50 mA per channel output current. The AD8512 series exceeds this at 70 mA per channel. The ADA4075 series provides 40 mA per channel. The ADA4000 series is limited to 28 mA per channel. Applications requiring output currents above 50 mA should use the AD8512 series. Applications with lower output current requirements can use any substitute. The LT1057IS8#PBF does not specify output current capability.

Q: What supply voltage range is common to all substitute parts and the original device?

A: No single supply voltage range encompasses all parts. The original TLE2142IDRG4 operates from 4 V to 44 V. The ADA4000 series operates from 8 V to 36 V, providing the widest overlap with the original specification among substitutes. The AD8512 series is limited to 10 V to 30 V. The LT1057IS8#PBF requires minimum 20 V supply. Applications requiring operation below 8 V or above 36 V cannot use standard substitutes without circuit modification.

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