TLE2071ID Equivalent & Substitute Parts

Part Overview

The TLE2071ID is a J-FET input operational amplifier manufactured by Texas Instruments in the Excalibur™ series. This device is a single-circuit, 8-SOIC surface mount integrated circuit designed for applications requiring low input bias current and high input impedance characteristics. The TLE2071ID is currently in Last Time Buy status, indicating that new production has ceased and existing inventory is limited. Identifying equivalent and substitute parts is necessary to ensure design continuity and long-term component availability for production and maintenance applications.

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	490	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	-40 to 85	°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 TLE2071ID are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Amplifier Type: J-FET input architecture
Number of Circuits: Single circuit configuration
Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
Mounting Type: Surface Mount
Operating Temperature Range: -40°C to 85°C minimum
Voltage Supply Span: Minimum 4.5V to 38V maximum
RoHS3 Compliance and MSL Level 1 rating

Performance Parameters for Functional Equivalence:

Slew Rate: 45V/µs or greater
Gain Bandwidth Product: 10 MHz or greater
Input Bias Current: 20 pA or lower
Input Offset Voltage: 490 µV or lower
Supply Current: 1.7 mA or lower
Output Current per Channel: 48 mA or greater

Substitute parts are classified into two categories: Direct Equivalents (identical electrical specifications and packaging) and Functional Alternatives (compatible electrical performance within application tolerance, same package form factor).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Package	Product Status
TLE2071ID	Texas Instruments	J-FET	45	10	20	490	1.7	48	4.5	38	-40 to 85	8-SOIC	Last Time Buy
TLE2071IDR	Texas Instruments	J-FET	45	10	20	490	1.7	48	4.5	38	-40 to 85	8-SOIC	Active
LT1122CS8#PBF	Analog Devices Inc.	J-FET	75	13	12	130	7.8	—	10	36	-40 to 85	8-SOIC	Active
LT1122CS8#TR	Analog Devices Inc.	J-FET	75	13	12	130	7.8	—	10	36	-40 to 85	8-SOIC	Active
LT1122CS8	Linear Technology	J-FET	75	13	12	130	7.8	—	10	36	-40 to 85	8-SOIC	Active
LT1055S8#PBF	Analog Devices Inc.	J-FET	12	4.5	30	500	2.8	—	10	36	0 to 70	8-SOIC	Active
LT1055S8	Analog Devices Inc.	J-FET	12	4.5	30	500	2.8	—	10	36	0 to 70	8-SOIC	Active
LT1008S8#PBF	Analog Devices Inc.	General Purpose	0.2	—	100	30	0.38	—	4	36	0 to 70	8-SOIC	Active
LT1008S8#TRPBF	Analog Devices Inc.	General Purpose	0.2	—	100	30	0.38	—	4	36	0 to 70	8-SOIC	Active
AD847ARZ	Analog Devices Inc.	General Purpose	300	50	3300	500	5.3	32	9	36	-40 to 85	8-SOIC	Active
AD847ARZ-REEL	Analog Devices Inc.	General Purpose	300	50	3300	500	5.3	32	9	36	-40 to 85	8-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: TLE2071IDR

The TLE2071IDR is the direct equivalent replacement for the TLE2071ID. Both devices are manufactured by Texas Instruments, share identical electrical specifications, and are housed in the same 8-SOIC package. The TLE2071IDR is currently in Active product status with 2800 pieces in stock, providing superior long-term availability compared to the Last Time Buy status of the TLE2071ID. This part is ROHS3 compliant with MSL Level 1 rating, matching all compliance requirements of the original part.

Secondary Recommendation: LT1122CS8#PBF or LT1122CS8#TR

The LT1122 series (Analog Devices Inc.) represents a functional alternative for applications where enhanced performance is acceptable. These J-FET input amplifiers offer superior slew rate (75V/µs versus 45V/µs), higher gain bandwidth product (13 MHz versus 10 MHz), and lower input bias current (12 pA versus 20 pA). The LT1122 series maintains the same 8-SOIC package form factor and operates across the -40°C to 85°C temperature range. However, the minimum supply voltage requirement is 10V (versus 4.5V for TLE2071ID), which may limit applicability in low-voltage designs. Both LT1122CS8#PBF (Tube packaging) and LT1122CS8#TR (Tape & Reel packaging) are in Active status with substantial inventory availability.

Tertiary Consideration: LT1055S8#PBF or LT1055S8

The LT1055 series provides J-FET input architecture in the same 8-SOIC package but with reduced performance specifications. The slew rate (12V/µs) and gain bandwidth product (4.5 MHz) are lower than the TLE2071ID, making this option suitable only for applications with relaxed bandwidth requirements. The operating temperature range is limited to 0°C to 70°C, which excludes use in full industrial temperature applications. This part is recommended only when cost optimization is prioritized over performance.

Not Recommended: LT1008S8 Series and AD847ARZ Series

The LT1008S8 series employs general-purpose amplifier architecture rather than J-FET input design, resulting in significantly higher input bias current (100 pA) and different performance characteristics. The operating temperature range is restricted to 0°C to 70°C. The AD847ARZ series, while offering superior bandwidth and slew rate, is a general-purpose amplifier with input bias current of 3.3 µA, which is incompatible with applications requiring the low input bias current characteristic of J-FET input amplifiers. These parts should not be used as direct substitutes for the TLE2071ID.

Frequently Asked Questions (FAQ)

Q1: Can I use TLE2071IDR as a direct replacement for TLE2071ID?

A: Yes. The TLE2071IDR is electrically and mechanically identical to the TLE2071ID. Both devices feature J-FET input architecture, identical electrical specifications (45V/µs slew rate, 10 MHz gain bandwidth product, 20 pA input bias current), and the same 8-SOIC package. The primary difference is product status: TLE2071IDR is in Active production status with greater long-term availability, while TLE2071ID is Last Time Buy. No circuit modifications are required for this substitution.

Q2: What is the key difference between J-FET input amplifiers and general-purpose amplifiers in the substitute list?

A: J-FET input amplifiers (TLE2071ID, LT1122CS8, LT1055S8) feature extremely low input bias current (12–30 pA range) and high input impedance, making them suitable for high-impedance signal sources and precision measurement applications. General-purpose amplifiers (LT1008S8, AD847ARZ) have significantly higher input bias current (100 pA to 3.3 µA) and are optimized for different application classes. Substituting a general-purpose amplifier for a J-FET input amplifier will degrade input impedance performance and introduce additional input bias current errors.

Q3: Why does the LT1122CS8 require a minimum 10V supply voltage while the TLE2071ID operates at 4.5V minimum?

A: The LT1122CS8 is designed with internal circuitry that requires a higher minimum supply voltage to maintain proper biasing and performance. The TLE2071ID achieves operation at lower supply voltages through different circuit topology. Applications operating at supply voltages below 10V cannot use the LT1122CS8 without external voltage regulation or conversion circuitry.

Q4: What does "Last Time Buy" status mean for the TLE2071ID?

A: Last Time Buy status indicates that Texas Instruments has ceased new production of the TLE2071ID and will not manufacture additional units beyond existing inventory. Current stock (1220 pieces) represents the final available supply. Once inventory is depleted, the part will become obsolete. This status necessitates identifying and qualifying substitute parts for long-term design continuity.

Q5: Are there packaging differences between TLE2071ID, LT1122CS8#PBF, and LT1122CS8#TR?

A: Both parts use the same 8-SOIC (0.154", 3.90mm width) package form factor, ensuring mechanical compatibility on printed circuit boards. The primary packaging difference is delivery format: #PBF indicates Tube packaging (loose components in protective tubes), while #TR indicates Tape & Reel packaging (components on continuous tape for automated assembly). Electrical performance and physical dimensions are identical. Selection between these formats depends on assembly process requirements and inventory management preferences.

Q6: Can I substitute LT1055S8 for TLE2071ID in a bandwidth-critical application?

A: No. The LT1055S8 has a gain bandwidth product of 4.5 MHz compared to the TLE2071ID's 10 MHz, representing a 55% reduction in bandwidth. Additionally, the slew rate is reduced from 45V/µs to 12V/µs. These performance reductions will degrade circuit response time and frequency response characteristics. The LT1055S8 is suitable only for applications with relaxed bandwidth requirements (below 4.5 MHz). The operating temperature range limitation (0°C to 70°C versus -40°C to 85°C) further restricts applicability.

Q7: What compliance certifications should I verify when selecting a substitute part?

A: Verify that the substitute part maintains ROHS3 compliance and MSL Level 1 (Unlimited moisture sensitivity) rating to ensure compatibility with manufacturing processes and long-term reliability. All recommended substitute parts in this document meet these requirements. Additionally, confirm that the REACH status matches the original part specification. The TLE2071ID and all primary substitute recommendations are REACH Unaffected, indicating no regulatory restrictions on use.

Q8: Is the LT1008S8 a suitable substitute for cost reduction?

A: No. While the LT1008S8 is housed in the same 8-SOIC package, it is a general-purpose amplifier with fundamentally different input characteristics. Input bias current is 100 pA (5 times higher than TLE2071ID), and it lacks J-FET input architecture. The operating temperature range is limited to 0°C to 70°C. This part should be used only in applications where general-purpose amplifier performance is acceptable and input bias current is not a critical parameter. Substituting LT1008S8 for TLE2071ID in precision measurement or high-impedance applications will result in performance degradation.

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