INA114APG4 Equivalent & Substitute Parts

Part Overview

The INA114APG4 is an instrumentation amplifier manufactured by Texas Instruments, featuring a single circuit in an 8-PDIP package. This device is classified as obsolete, though 705 units remain in stock as new original inventory. The INA114APG4 operates across a wide supply voltage range of 4.5V to 36V and maintains performance across the industrial temperature range of -40°C to 85°C. Due to its obsolete status, identifying active equivalent and substitute parts is essential for design continuity and long-term component availability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Instrumentation	—
Number of Circuits	1	—
Slew Rate	0.6	V/µs
-3dB Bandwidth	1	MHz
Current - Input Bias	500	pA
Voltage - Input Offset	25	µV
Current - Supply	2.2	mA
Current - Output / Channel	20	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62mm)	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the INA114APG4 is determined by strict electrical and mechanical compatibility across the following critical parameters:

Primary Compatibility Criteria:

Amplifier Type: Instrumentation
Number of Circuits: 1
Package / Case: 8-DIP (0.300", 7.62mm)
Mounting Type: Through Hole
Operating Temperature Range: -40°C to 85°C
Supply Voltage Range: Minimum 4.5V to Maximum 36V
RoHS3 Compliance

Secondary Performance Parameters:

Slew Rate: 0.6 V/µs or greater
-3dB Bandwidth: 1 MHz or greater
Current - Input Bias: 500 pA or lower
Voltage - Input Offset: 25 µV or lower
Current - Supply: 2.2 mA or lower
Current - Output / Channel: 20 mA or greater

Substitute parts are grouped into two categories based on their electrical performance relative to the INA114APG4:

Category A - Direct Equivalents (Matched Performance): Parts that maintain the same electrical specifications as the INA114APG4, with identical or superior performance across all key parameters.

Category B - Enhanced Performance Substitutes (Superior Specifications): Parts that exceed the INA114APG4 specifications in one or more performance parameters while maintaining full backward compatibility and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	Bandwidth (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
INA114APG4	Texas Instruments	Obsolete	0.6	1	500	25	2.2	20	4.5	36	-40 to 85	8-DIP
INA114AP	Texas Instruments	Active	0.6	1	500	25	2.2	20	4.5	36	-40 to 85	8-DIP
AD620ANZ	Analog Devices Inc.	Active	1.2	1	500	30	0.9	18	4.6	36	-40 to 85	8-DIP
AD620BNZ	Analog Devices Inc.	Active	1.2	1	500	15	0.9	18	4.6	36	-40 to 85	8-DIP
AD622ANZ	Analog Devices Inc.	Active	1.2	1	2000	60	0.9	18	5.2	36	-40 to 85	8-DIP
AMP02EPZ	Analog Devices Inc.	Active	6	1.2	2000	20	5	32	9	36	-40 to 85	8-DIP
AMP02FPZ	Analog Devices Inc.	Active	6	1.2	4000	40	5	32	9	36	-40 to 85	8-DIP
LT1167AIN8#PBF	Analog Devices Inc.	Active	1.2	1	50	15	0.9	27	4.6	36	-40 to 85	8-DIP
LT1167CN8#PBF	Analog Devices Inc.	Active	1.2	1	80	20	0.9	—	4.6	36	0 to 70	8-DIP
LT1167IN8#PBF	Analog Devices Inc.	Active	1.2	1	80	20	0.9	27	4.6	36	-40 to 85	8-DIP
LT1168ACN8#PBF	Analog Devices Inc.	Active	0.5	0.4	40	15	0.35	32	4.6	36	0 to 70	8-DIP

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for Immediate Substitution):

INA114AP is the primary recommended substitute. This part is manufactured by Texas Instruments, the original manufacturer of the INA114APG4, and maintains identical electrical specifications across all parameters. The INA114AP is in active production status with 6,646 units in stock, ensuring long-term availability. Both parts are ROHS3 compliant and carry identical compliance certifications (REACH Unaffected, EAR99, HTSUS 8542.33.0001). The only difference is packaging format (Tube vs. standard), which does not affect electrical performance or board-level compatibility.

Tier 2 - Enhanced Performance Substitutes (For Applications Requiring Improved Specifications):

The LT1167AIN8#PBF offers superior performance with 10× lower input bias current (50 pA vs. 500 pA), lower input offset voltage (15 µV vs. 25 µV), and higher output current capability (27 mA vs. 20 mA). This part maintains the full -40°C to 85°C operating range and is in active production with 1,105 units available. The LT1167AIN8#PBF is suitable for applications requiring lower noise and higher precision.

The AD620BNZ provides excellent input offset voltage performance (15 µV) with lower supply current consumption (0.9 mA vs. 2.2 mA). This part is in active production with 1,688 units in stock and is recommended for power-sensitive applications.

Tier 3 - High-Performance Alternatives (For Applications Requiring Extended Bandwidth or Slew Rate):

The AMP02EPZ and AMP02FPZ offer significantly higher slew rate (6 V/µs vs. 0.6 V/µs) and extended bandwidth (1.2 MHz vs. 1 MHz). However, these parts require a minimum supply voltage of 9V (vs. 4.5V for the INA114APG4) and consume higher supply current (5 mA vs. 2.2 mA). These substitutes are suitable only for applications with higher supply voltage availability and where increased bandwidth is required.

Parts Not Recommended for Direct Substitution:

LT1168ACN8#PBF operates only across 0°C to 70°C temperature range, which does not meet the full -40°C to 85°C requirement of the INA114APG4. This part is suitable only for applications with restricted temperature requirements.

AD622ANZ requires a minimum supply voltage of 5.2V and exhibits higher input bias current (2 nA) and input offset voltage (60 µV), making it unsuitable as a direct replacement.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace INA114APG4 with INA114AP without any circuit modifications?

A: Yes. The INA114AP is electrically identical to the INA114APG4 across all specified parameters. Both parts operate across 4.5V to 36V supply range, maintain the same -40°C to 85°C temperature range, and are packaged in 8-DIP format. The only difference is packaging format (Tube), which does not affect electrical performance or PCB compatibility. No circuit modifications are required.

Q2: What is the primary reason for substituting the INA114APG4?

A: The INA114APG4 is classified as obsolete. While 705 units remain in current stock, long-term availability cannot be guaranteed. The INA114AP, manufactured by the same company (Texas Instruments), is in active production status with significantly higher inventory (6,646 units), ensuring sustained component availability for future production runs and field replacements.

Q3: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this document are ROHS3 compliant and carry identical regulatory certifications (REACH Unaffected, EAR99, HTSUS 8542.33.0001) as the original INA114APG4. All parts are suitable for applications requiring environmental compliance.

Q4: Which substitute offers the lowest power consumption?

A: The LT1168ACN8#PBF offers the lowest supply current at 350 µA. However, this part operates only across 0°C to 70°C temperature range and has reduced bandwidth (400 kHz vs. 1 MHz), making it unsuitable for applications requiring the full -40°C to 85°C operating range of the INA114APG4. For applications requiring full temperature range operation, the AD620ANZ and AD620BNZ offer the lowest supply current at 900 µA.

Q5: Can I use AMP02EPZ or AMP02FPZ as direct replacements?

A: No. While these parts are instrumentation amplifiers in 8-DIP packages, they require a minimum supply voltage of 9V compared to 4.5V for the INA114APG4. If your circuit operates at 4.5V to 8.9V supply voltage, these parts cannot be used. Additionally, these parts consume higher supply current (5 mA vs. 2.2 mA). Use these parts only in applications with supply voltage of 9V or higher and where increased bandwidth (1.2 MHz) and slew rate (6 V/µs) are required.

Q6: What is the difference between AD620ANZ and AD620BNZ?

A: Both parts are manufactured by Analog Devices Inc. and share identical electrical specifications except for input offset voltage. The AD620ANZ has 30 µV input offset voltage, while the AD620BNZ has 15 µV input offset voltage. The AD620BNZ is recommended for applications requiring lower offset voltage and higher precision. Both parts operate across -40°C to 85°C and are in active production.

Q7: Is the LT1167CN8#PBF suitable for industrial temperature range applications?

A: No. The LT1167CN8#PBF operates only across 0°C to 70°C temperature range, which does not meet the -40°C to 85°C requirement of the INA114APG4. This part is suitable only for commercial temperature range applications. For industrial temperature range requirements, use LT1167AIN8#PBF or LT1167IN8#PBF, both of which operate across -40°C to 85°C.

Q8: What are the key electrical differences between LT1167AIN8#PBF and LT1167IN8#PBF?

A: Both parts are identical in electrical performance and operating temperature range (-40°C to 85°C). The primary difference is input bias current specification: LT1167AIN8#PBF specifies 50 pA, while LT1167IN8#PBF specifies 80 pA. Both parts offer superior input bias current performance compared to the INA114APG4 (500 pA). Select based on specific application requirements for input bias current precision.

Q9: Can I use multiple substitute parts interchangeably in the same design?

A: No. While all listed parts are instrumentation amplifiers in 8-DIP packages, they have different electrical specifications. Interchanging parts with different slew rates, bandwidth, input offset voltage, or supply current requirements will alter circuit performance. Select a single substitute part based on your application requirements and maintain consistency across all units in production.

Q10: Which substitute part offers the best overall performance improvement over the INA114APG4?

A: The LT1167AIN8#PBF offers the most comprehensive performance improvement: 10× lower input bias current (50 pA vs. 500 pA), lower input offset voltage (15 µV vs. 25 µV), 2× higher slew rate (1.2 V/µs vs. 0.6 V/µs), and higher output current capability (27 mA vs. 20 mA). This part maintains full -40°C to 85°C temperature range operation and is in active production with good inventory availability (1,105 units).

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