TLE2081ACP Equivalent & Substitute Parts

Part Overview

The TLE2081ACP is a J-FET input operational amplifier manufactured by Texas Instruments in the Excalibur™ series. This device is a single-circuit, 8-DIP through-hole package operational amplifier designed for applications requiring low input bias current and low input offset voltage characteristics. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for existing applications or new designs requiring similar performance characteristics.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	45	V/µs
Gain Bandwidth Product	10	MHz
Current - Input Bias	20	pA
Voltage - Input Offset	470	µV
Current - Supply	1.7	mA
Current - Output / Channel	48	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	38	V
Operating Temperature	0 to 70	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62mm)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TLE2081ACP is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET input architecture
Number of Circuits: Single circuit configuration
Package / Case: 8-DIP through-hole form factor
Operating Temperature Range: 0°C to 70°C minimum
Supply Voltage Range: Minimum 4.5V to maximum 38V overlap
RoHS Compliance: ROHS3 Compliant

Secondary Performance Parameters:

Slew Rate: 45 V/µs or greater
Gain Bandwidth Product: 10 MHz or greater
Input Bias Current: 20 pA or lower
Input Offset Voltage: 470 µV or lower

Substitute parts are grouped into two categories:

Category 1: Direct Packaging Equivalent (8-DIP Through-Hole) Parts maintaining identical through-hole DIP packaging with J-FET input characteristics and compatible electrical specifications.

Category 2: Surface Mount Alternative (8-SOIC) The TLE2081ACDR provides functional equivalence with surface-mount packaging for designs transitioning to SMT assembly.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Package	Status
TLE2081ACP	Texas Instruments	J-FET	45	10	20	470	1.7	8-DIP	Last Time Buy
TLE2081ACDR	Texas Instruments	J-FET	45	10	20	470	1.7	8-SOIC	Active
AD845JNZ	Analog Devices Inc.	J-FET	100	16	750	700	10	8-DIP	Active
AD847JNZ	Analog Devices Inc.	General Purpose	300	50	3300	500	5.3	8-DIP	Active
LT1008CN8#PBF	Analog Devices Inc.	General Purpose	0.2	—	30	30	0.38	8-DIP	Active
LT1055CN8#PBF	Analog Devices Inc.	J-FET	12	4.5	30	120	2.8	8-DIP	Active
LT1122BCN8#PBF	Linear Technology	J-FET	80	14	10	120	7.5	8-DIP	Active
LT1122CCN8#PBF	Analog Devices Inc.	J-FET	75	13	12	130	7.8	8-DIP	Active
LT1122DCN8#PBF	Analog Devices Inc.	J-FET	75	13	12	130	7.8	8-DIP	Active
LT1354CN8#PBF	Analog Devices Inc.	Voltage Feedback	400	12	80	300	1	8-DIP	Active

Engineering Selection Recommendations

Tier 1: Recommended Direct Replacement

TLE2081ACDR (Texas Instruments, 8-SOIC, Active Status) This part is the manufacturer-recommended equivalent with identical electrical specifications to the TLE2081ACP. The only difference is packaging format (surface-mount 8-SOIC versus through-hole 8-DIP). Selection of this part is appropriate for new designs or PCB redesigns supporting surface-mount assembly. Active product status ensures long-term availability and supply continuity.

Tier 2: Compatible Through-Hole Alternatives

LT1122CCN8#PBF and LT1122DCN8#PBF (Analog Devices Inc., 8-DIP, Active Status) These J-FET input amplifiers provide superior slew rate (75 V/µs versus 45 V/µs) and gain bandwidth product (13 MHz versus 10 MHz) while maintaining compatible input bias current (12 pA versus 20 pA) and low input offset voltage (130 µV versus 470 µV). Both parts are ROHS3 compliant and active products. The LT1122 series operates across an extended temperature range (-40°C to 85°C), providing additional margin beyond the TLE2081ACP specification (0°C to 70°C). Higher supply current (7.8 mA versus 1.7 mA) must be evaluated for power budget applications.

LT1122BCN8#PBF (Linear Technology, 8-DIP, Active Status) This variant offers similar performance to the LT1122CCN8#PBF and LT1122DCN8#PBF with slew rate of 80 V/µs and gain bandwidth product of 14 MHz. Input bias current is superior at 10 pA. Extended temperature range (-40°C to 85°C) and active product status support long-term design continuity.

Tier 3: Performance-Enhanced Alternatives

AD845JNZ (Analog Devices Inc., 8-DIP, Active Status) This J-FET input amplifier provides enhanced slew rate (100 V/µs) and gain bandwidth product (16 MHz) compared to the TLE2081ACP. Input bias current is higher at 750 pA, and input offset voltage is 700 µV. Supply current requirement is 10 mA. This part is suitable for applications requiring higher bandwidth and slew rate performance where increased input bias current is acceptable.

Tier 4: Specialized Alternatives

LT1354CN8#PBF (Analog Devices Inc., 8-DIP, Active Status) This voltage feedback amplifier offers significantly higher slew rate (400 V/µs) and lower supply current (1 mA). However, input bias current is substantially higher at 80 nA, and amplifier topology differs from J-FET input architecture. Selection is appropriate only for applications where voltage feedback topology and high slew rate are primary requirements.

LT1008CN8#PBF (Analog Devices Inc., 8-DIP, Active Status) This general-purpose amplifier provides extremely low input offset voltage (30 µV) and minimal supply current (0.38 mA). However, slew rate is significantly reduced (0.2 V/µs), making this part unsuitable for high-speed applications. Selection is limited to precision, low-speed measurement circuits.

AD847JNZ (Analog Devices Inc., 8-DIP, Active Status) This general-purpose amplifier offers high slew rate (300 V/µs) and high gain bandwidth product (50 MHz). Input bias current is substantially higher at 3.3 µA. This part is suitable only for applications where high-speed performance is critical and input bias current specifications are relaxed.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace TLE2081ACP with TLE2081ACDR in my existing PCB?

A: No. The TLE2081ACDR uses 8-SOIC surface-mount packaging, while the TLE2081ACP uses 8-DIP through-hole packaging. PCB redesign is required. However, electrical specifications are identical, making this the preferred long-term solution for new designs or PCB revisions.

Q2: What is the key difference between J-FET and general-purpose amplifier types?

A: J-FET input amplifiers feature extremely low input bias current (typically in the picoampere range) and are suitable for high-impedance signal sources and precision measurement applications. General-purpose amplifiers typically have higher input bias current (microampere to nanoampere range) but may offer higher bandwidth and slew rate. Selection depends on application requirements.

Q3: Why do some substitute parts have higher supply current than the TLE2081ACP?

A: Supply current varies with amplifier design, bandwidth, and slew rate specifications. Higher bandwidth and slew rate typically require increased quiescent current. Applications with strict power budget constraints must evaluate total system power consumption, not component-level current alone.

Q4: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed are ROHS3 compliant. Compliance status is provided in the input specifications and must be verified for each part before selection.

Q5: Can I use AD847JNZ as a direct replacement for TLE2081ACP?

A: AD847JNZ is not a direct replacement. While both are 8-DIP through-hole packages, AD847JNZ is a general-purpose amplifier with significantly different electrical characteristics: input bias current of 3.3 µA (versus 20 pA), higher slew rate (300 V/µs), and higher gain bandwidth product (50 MHz). Selection is appropriate only for applications where high-speed performance is required and low input bias current is not critical.

Q6: What is the operating temperature range difference between TLE2081ACP and LT1122 series?

A: TLE2081ACP operates from 0°C to 70°C. LT1122 series (LT1122BCN8#PBF, LT1122CCN8#PBF, LT1122DCN8#PBF) operates from -40°C to 85°C. The extended range provides additional margin for industrial and automotive applications operating outside the commercial temperature range.

Q7: Which substitute part offers the best input offset voltage performance?

A: LT1008CN8#PBF provides the lowest input offset voltage at 30 µV, compared to TLE2081ACP at 470 µV. However, LT1008CN8#PBF has significantly reduced slew rate (0.2 V/µs) and is suitable only for precision, low-speed applications.

Q8: Is inventory availability a factor in part selection?

A: Yes. TLE2081ACP is in Last Time Buy status with 996 pieces in stock. All recommended substitute parts are in Active status with higher inventory levels: TLE2081ACDR (3777 pcs), AD845JNZ (19000 pcs), LT1122 variants (920-1415 pcs), and LT1354CN8#PBF (1761 pcs). Active status ensures long-term supply continuity.

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