TL032ACD Equivalent & Substitute Parts

Part Overview

The TL032ACD is a J-FET input operational amplifier featuring dual circuits in an 8-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory of 2,245 pieces. The TL032ACD operates across a supply voltage range of 10V to 30V with a slew rate of 5.1V/µs and gain bandwidth product of 1.1 MHz, making it suitable for precision analog signal processing applications requiring low input bias current (2 pA) and low input offset voltage (570 µV).

Identifying equivalent and substitute parts is necessary due to the Last Time Buy status, which restricts long-term availability. Alternative components with identical or compatible electrical and mechanical specifications ensure design continuity and supply chain reliability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	2	—
Slew Rate	5.1	V/µs
Gain Bandwidth Product	1.1	MHz
Current - Input Bias	2	pA
Voltage - Input Offset	570	µV
Current - Supply (x2 Channels)	422	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TL032ACD is determined by strict compatibility across electrical and mechanical parameters. The primary substitution criteria are:

Electrical Compatibility Requirements:

Amplifier Type: J-FET input topology (required for low input bias current and offset voltage characteristics)
Number of Circuits: Dual-channel configuration (2 circuits)
Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
Mounting Type: Surface Mount
Supply Voltage Range: Minimum 10V to Maximum 30V overlap
Operating Temperature: 0°C to 70°C minimum coverage

Mechanical Compatibility Requirements:

Supplier Device Package: 8-SOIC
Compliance: ROHS3 Compliant, REACH Unaffected

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (J-FET Amplifiers) Parts maintaining identical amplifier type, circuit count, and core electrical specifications within the specified supply and temperature ranges. These include TL032ACDR (Texas Instruments, Tape & Reel packaging), AD648JRZ variants (Analog Devices Inc.), and LF253DT / LF353DT (STMicroelectronics).

Category 2: Functional Alternatives (General Purpose Amplifiers) Parts with different amplifier topology (General Purpose instead of J-FET) but compatible package, pin count, and output capability. These include LM258ADT, LM258AYDT, LM2904AS-13, and LM2904AYDT. These alternatives sacrifice the ultra-low input bias current characteristic but maintain dual-circuit 8-SOIC configuration and supply voltage compatibility.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Packaging	Status
TL032ACD	Texas Instruments	J-FET	5.1	1.1	2	570	422	40	10	30	0 to 70	Tube	Last Time Buy
TL032ACDR	Texas Instruments	J-FET	5.1	1.1	2	570	422	40	10	30	0 to 70	Tape & Reel	Active
AD648JRZ	Analog Devices Inc.	J-FET	1.8	1	5	750	340	15	9	36	0 to 70	Tube	Active
AD648JRZ-REEL	Analog Devices Inc.	J-FET	1.8	1	5	750	340	15	9	36	0 to 70	Cut Tape	Active
AD648JRZ-REEL7	Analog Devices Inc.	J-FET	1.8	1	5	750	340	15	9	36	0 to 70	Cut Tape & Digi-Reel	Active
LF253DT	STMicroelectronics	J-FET	16	4	20	3000	1400	40	6	36	-40 to 105	Cut Tape & Digi-Reel	Active
LF353DT	STMicroelectronics	J-FET	16	4	20	3000	1400	40	6	36	0 to 70	Cut Tape & Digi-Reel	Active
LM258ADT	STMicroelectronics	General Purpose	0.6	1.1	20000	1000	700	40	3	30	-40 to 105	Cut Tape & Digi-Reel	Active
LM258AYDT	STMicroelectronics	General Purpose	0.6	1.1	20000	1000	700	40	3	30	-40 to 105	Tape & Reel	Active
LM2904AS-13	Diodes Incorporated	General Purpose	0.3	0.7	20000	1000	700	40	3	36	-40 to 125	Tape & Reel	Active
LM2904AYDT	STMicroelectronics	General Purpose	0.6	1.1	20000	1000	700	40	3	30	-40 to 125	Cut Tape & Digi-Reel	Active

Engineering Selection Recommendations

Tier 1: Direct Substitutes (Identical Electrical Performance)

TL032ACDR is the primary recommended substitute. Manufactured by Texas Instruments, it maintains identical electrical specifications to the TL032ACD across all critical parameters: J-FET amplifier type, 5.1V/µs slew rate, 1.1 MHz gain bandwidth product, 2 pA input bias current, and 570 µV input offset voltage. The only difference is packaging format (Tape & Reel versus Tube), which does not affect electrical function. Product status is Active with 8,140 pieces in inventory, ensuring long-term availability. ROHS3 compliance and REACH unaffected status match the original part.

Tier 2: J-FET Equivalents with Parameter Variations

AD648JRZ, AD648JRZ-REEL, and AD648JRZ-REEL7 (Analog Devices Inc.) maintain J-FET amplifier topology and dual-circuit configuration. These parts operate within the TL032ACD supply voltage range (9V to 36V encompasses the 10V to 30V requirement). However, electrical performance differs: slew rate is reduced to 1.8V/µs, gain bandwidth product is 1 MHz, input bias current is 5 pA, and input offset voltage is 750 µV. These differences are acceptable for applications where the TL032ACD's higher slew rate and lower offset voltage are not critical. All three variants are Active status with substantial inventory (3,521 to 7,928 pieces).

LF253DT and LF353DT (STMicroelectronics) are J-FET amplifiers with enhanced performance: 16V/µs slew rate and 4 MHz gain bandwidth product exceed TL032ACD specifications. However, input bias current (20 pA) and input offset voltage (3 mV) are significantly higher, making these suitable only for applications where precision is not required. LF253DT supports extended temperature range (-40°C to 105°C). Both are Active status with high inventory availability (6,520 to 72,138 pieces).

Tier 3: General Purpose Alternatives

LM258ADT, LM258AYDT, LM2904AS-13, and LM2904AYDT are general-purpose amplifiers with different topology. These parts sacrifice J-FET input characteristics (input bias current increases to 20 nanoamperes, input offset voltage to 1 millivolt) but maintain dual-circuit 8-SOIC packaging and 40 mA output current. Supply voltage compatibility is confirmed: all support 3V to 30V or 3V to 36V ranges, encompassing the TL032ACD requirement. These alternatives are suitable only for applications where ultra-low input bias current and offset voltage are not specifications. All are Active status with high inventory (2,670 to 60,400 pieces). LM258ADT and LM258AYDT include AEC-Q100 automotive qualification.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original TL032ACD. Moisture Sensitivity Level is 1 (Unlimited) for all parts except LM2904AS-13 (MSL 3, 168 Hours), which requires controlled storage conditions.

Frequently Asked Questions (FAQ)

Q1: Can TL032ACDR be used as a direct replacement for TL032ACD?

Yes. TL032ACDR is electrically identical to TL032ACD across all specified parameters. The only difference is packaging format: TL032ACDR is supplied in Tape & Reel format while TL032ACD is supplied in Tube format. Both are 8-SOIC surface mount packages with identical pin configuration and electrical performance. TL032ACDR is Active status with higher inventory availability.

Q2: What are the key differences between J-FET and General Purpose amplifier substitutes?

J-FET amplifiers (TL032ACD, AD648JRZ, LF253DT, LF353DT) feature extremely low input bias current (2 to 20 pA range) and low input offset voltage (570 µV to 3 mV range). General Purpose amplifiers (LM258, LM2904 series) have input bias current in the nanoampere range (20 nA) and input offset voltage in the millivolt range (1 mV). J-FET types are required for high-impedance signal sources and precision analog circuits. General Purpose types are suitable for standard signal conditioning applications where input impedance is not critical.

Q3: Are the AD648JRZ variants interchangeable with each other?

AD648JRZ, AD648JRZ-REEL, and AD648JRZ-REEL7 are electrically identical. Differences are in packaging format: AD648JRZ is Tube, AD648JRZ-REEL is Cut Tape, and AD648JRZ-REEL7 is Cut Tape with Digi-Reel. All three have identical electrical specifications and 8-SOIC package dimensions. Selection depends on procurement and assembly requirements.

Q4: Can LF253DT or LF353DT replace TL032ACD in precision applications?

LF253DT and LF353DT are not recommended for precision applications requiring low input offset voltage. While both are J-FET amplifiers, their input offset voltage (3 mV) is significantly higher than TL032ACD (570 µV), representing a 5.3× increase. Input bias current is also higher (20 pA versus 2 pA). These parts are suitable for applications where higher slew rate (16V/µs) and bandwidth (4 MHz) are prioritized over precision.

Q5: What is the impact of using General Purpose amplifiers instead of J-FET types?

General Purpose amplifiers (LM258, LM2904 series) have 10,000× higher input bias current than TL032ACD. This creates significant errors in high-impedance circuits (>1 MΩ source impedance). Input offset voltage is also 1.75× to 1.8× higher. These substitutes are acceptable only for low-impedance signal sources and applications where offset voltage drift is not critical. They are not suitable for precision instrumentation, sensor interfaces, or high-impedance transducer circuits.

Q6: Does supply voltage range affect substitution compatibility?

Yes. TL032ACD requires 10V to 30V supply range. AD648JRZ variants support 9V to 36V, which encompasses the requirement. LF253DT and LF353DT support 6V to 36V, also compatible. General Purpose amplifiers support 3V to 30V or 3V to 36V, which includes the TL032ACD range. However, if your circuit operates at the lower end of TL032ACD range (10V to 12V), verify that substitute parts are specified for operation at that voltage level.

Q7: What is the significance of Last Time Buy status for TL032ACD?

Last Time Buy indicates Texas Instruments has discontinued production of TL032ACD. The 2,245 pieces in current inventory represent the final available stock. Once depleted, the part will be unavailable. Design migration to an Active status substitute (such as TL032ACDR or AD648JRZ) is recommended to ensure long-term supply chain continuity and avoid future obsolescence issues.

Q8: Are there temperature range limitations for substitutes?

TL032ACD operates 0°C to 70°C. AD648JRZ variants match this range. LF253DT extends to -40°C to 105°C. LF353DT matches 0°C to 70°C. General Purpose amplifiers (LM258, LM2904 series) support -40°C to 105°C or -40°C to 125°C, exceeding TL032ACD range. If your application requires operation below 0°C or above 70°C, verify substitute part temperature specifications.

Q9: What is the Moisture Sensitivity Level (MSL) consideration?

TL032ACD and most substitutes have MSL 1 (Unlimited), meaning no moisture sensitivity restrictions. LM2904AS-13 has MSL 3 (168 Hours), requiring controlled storage and handling. If using LM2904AS-13, parts must be stored in dry conditions and used within 168 hours of package opening. This adds handling complexity compared to MSL 1 parts.

Q10: Can I use multiple substitute parts in the same design?

No. Select a single substitute part for your application based on electrical requirements. Mixing different amplifier types in a single circuit introduces performance inconsistencies and complicates troubleshooting. If your design uses multiple TL032ACD devices, use the same substitute part number for all instances to maintain consistent performance across the circuit.

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