INA145UA Equivalent & Substitute Parts

Part Overview

The INA145UA is a differential amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This linear amplifier device is designed for applications requiring single-circuit differential signal conditioning with a supply voltage range of 4.5 V to 36 V and operating temperature range of -40°C to 85°C. The INA145UA is currently classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for ongoing production and support requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Differential	—
Number of Circuits	1	—
Slew Rate	0.45	V/µs
-3dB Bandwidth	500	kHz
Current - Input Bias	50	nA
Voltage - Input Offset	200	µV
Current - Supply	570	µA
Current - Output / Channel	15	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	3 (168 Hours)	—

Substitute Part Grouping Explanation

Substitution of the INA145UA is determined by compatibility across the following critical parameters: amplifier type, number of circuits, package type, mounting method, supply voltage range, operating temperature range, and regulatory compliance status. The INA145UA is a differential amplifier with specific electrical characteristics that define its functional role in signal conditioning applications.

Substitute parts are grouped into two categories based on functional equivalence:

Category 1: Direct Functional Equivalents (Differential Amplifier Type) Parts that maintain the differential amplifier topology and are manufactured by Texas Instruments with identical or compatible electrical specifications. These parts operate within the same supply voltage range and temperature specifications.

Category 2: Alternative Amplifier Topologies (J-FET and Voltage Feedback Types) Parts that employ different amplifier architectures (J-FET or voltage feedback) but are housed in the same 8-SOIC package and support the same supply voltage range. These alternatives provide different performance characteristics suitable for specific application requirements.

The substitution logic is based strictly on:

Package compatibility (8-SOIC surface mount)
Supply voltage range overlap (minimum 4.5 V to 36 V capability)
Operating temperature range coverage (-40°C to 85°C or broader)
RoHS3 compliance and regulatory status
Single-circuit configuration

Parameter Comparison

Parameter	INA145UA	INA145UA/2K5	AD711JRZ-REEL7	LT1226CS8#PBF	LT1354CS8#TRPBF	LT1354IS8#PBF	LT1793AIS8#TRPBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Differential	Differential	J-FET	General Purpose	Voltage Feedback	Voltage Feedback	J-FET
Number of Circuits	1	1	1	1	1	1	1
Slew Rate (V/µs)	0.45	0.45	20	400	400	400	3.4
Bandwidth (kHz / MHz)	500 kHz	500 kHz	4 MHz	1 GHz	12 MHz	12 MHz	4.2 MHz
Current - Input Bias	50 nA	50 nA	15 pA	4 µA	80 nA	80 nA	3 pA
Voltage - Input Offset (µV)	200	200	300	300	300	300	250
Current - Supply	570 µA	570 µA	2.5 mA	7 mA	1 mA	1 mA	4.2 mA
Current - Output / Channel (mA)	15	15	25	—	30	30	—
Voltage - Supply Span (Min)	4.5 V	4.5 V	9 V	5 V	5 V	5 V	9 V
Voltage - Supply Span (Max)	36 V	36 V	36 V	30 V	30 V	30 V	40 V
Operating Temperature	-40 to 85°C	-40 to 85°C	0 to 70°C	0 to 70°C	0 to 70°C	-40 to 85°C	-40 to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: INA145UA/2K5

The INA145UA/2K5 is the recommended direct substitute for the INA145UA. Both parts are manufactured by Texas Instruments and maintain identical electrical specifications across all critical parameters: differential amplifier topology, 500 kHz bandwidth, 0.45 V/µs slew rate, 50 nA input bias current, and 200 µV input offset voltage. The INA145UA/2K5 operates within the same supply voltage range (4.5 V to 36 V) and temperature range (-40°C to 85°C). The primary distinction is product status: INA145UA/2K5 is classified as Active, ensuring continued availability and manufacturing support. Both parts are ROHS3 compliant and carry identical MSL ratings. The packaging difference (Cut Tape & Digi-Reel® versus standard packaging) does not affect electrical compatibility.

Secondary Substitutes: AD711JRZ-REEL7 and LT1793AIS8#TRPBF

These J-FET amplifier alternatives provide superior input bias current performance (15 pA and 3 pA respectively, compared to 50 nA) and extended bandwidth capabilities (4 MHz and 4.2 MHz respectively). Both are housed in 8-SOIC packages and support the full 36 V maximum supply voltage. The AD711JRZ-REEL7 operates over 0°C to 70°C, while LT1793AIS8#TRPBF extends to -40°C to 85°C, matching the original temperature range. These alternatives are suitable for applications where lower input bias current and higher bandwidth are beneficial, though they require minimum supply voltages of 9 V.

Tertiary Substitutes: LT1354CS8#TRPBF and LT1354IS8#PBF

These voltage feedback amplifiers offer significantly higher slew rate (400 V/µs) and bandwidth (12 MHz) compared to the INA145UA. The LT1354IS8#PBF maintains the full -40°C to 85°C operating temperature range. Both parts are housed in 8-SOIC packages and are ROHS3 compliant. These alternatives are applicable in applications requiring higher frequency response, though they operate with a maximum supply voltage of 30 V, which is lower than the INA145UA's 36 V maximum.

Compliance and Regulatory Status

All substitute parts listed are ROHS3 compliant and carry REACH Unaffected status, matching the regulatory compliance profile of the INA145UA. All parts are classified under ECCN EAR99 and HTSUS 8542.33.0001. MSL ratings vary: INA145UA and INA145UA/2K5 carry MSL 3 (168 Hours), while all Analog Devices alternatives carry MSL 1 (Unlimited), indicating superior moisture resistance characteristics.

Frequently Asked Questions (FAQ)

Q: Can INA145UA/2K5 be used as a direct replacement for INA145UA?

A: Yes. The INA145UA/2K5 is a direct functional equivalent with identical electrical specifications, supply voltage range, operating temperature range, and package type. The primary advantage is Active product status, ensuring continued availability. The packaging format difference (Cut Tape & Digi-Reel® versus standard) does not affect electrical performance or PCB compatibility.

Q: What is the key difference between the INA145UA and the AD711JRZ-REEL7?

A: The primary differences are amplifier topology and input bias current. The INA145UA is a differential amplifier with 50 nA input bias current, while the AD711JRZ-REEL7 is a J-FET amplifier with 15 pA input bias current. The AD711JRZ-REEL7 also provides higher bandwidth (4 MHz versus 500 kHz) and faster slew rate (20 V/µs versus 0.45 V/µs). However, the AD711JRZ-REEL7 requires a minimum supply voltage of 9 V and operates only to 70°C, compared to the INA145UA's 4.5 V minimum and 85°C maximum.

Q: Are all substitute parts housed in the same 8-SOIC package?

A: Yes. All substitute parts listed are housed in 8-SOIC (0.154", 3.90mm Width) surface mount packages, ensuring mechanical and PCB layout compatibility with the INA145UA.

Q: Which substitute part maintains the full -40°C to 85°C operating temperature range?

A: Three parts maintain the full -40°C to 85°C range: INA145UA/2K5, LT1354IS8#PBF, and LT1793AIS8#TRPBF. The AD711JRZ-REEL7 and LT1226CS8#PBF operate only to 70°C.

Q: What is the significance of the MSL rating difference?

A: The INA145UA and INA145UA/2K5 carry MSL 3 (168 Hours), indicating moisture sensitivity requiring controlled storage and handling conditions. All Analog Devices alternatives carry MSL 1 (Unlimited), indicating superior moisture resistance and less stringent storage requirements. This difference may impact supply chain logistics and component shelf life management.

Q: Can LT1354 series parts replace the INA145UA in all applications?

A: LT1354 series parts (LT1354CS8#TRPBF and LT1354IS8#PBF) are voltage feedback amplifiers with different topology and performance characteristics. While they share the same 8-SOIC package and ROHS3 compliance, they operate with a maximum supply voltage of 30 V (versus 36 V for INA145UA) and provide significantly higher bandwidth and slew rate. Substitution is application-dependent and requires verification that the higher performance characteristics and lower maximum supply voltage are compatible with the target circuit design.

Q: What is the supply voltage compatibility range across all substitute parts?

A: The INA145UA and INA145UA/2K5 support 4.5 V to 36 V. The AD711JRZ-REEL7 and LT1793AIS8#TRPBF require minimum 9 V. The LT1226CS8#PBF and LT1354 series require minimum 5 V. All parts support maximum supply voltages between 30 V and 40 V. Substitution requires verification that the target supply voltage falls within the substitute part's specified range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and carry REACH Unaffected status, matching the regulatory compliance profile of the INA145UA.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message