OPA2132PA Equivalent & Substitute Parts

Part Overview

The OPA2132PA is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in an 8-DIP through-hole package. This part is classified as Last Time Buy, indicating discontinued production with limited remaining inventory (4200 pcs). The OPA2132PA is designed for applications requiring low input bias current, low input offset voltage, and moderate bandwidth performance in dual-channel configurations.

Identification of equivalent and substitute parts is necessary due to the Last Time Buy status. Alternative parts with compatible electrical and mechanical parameters enable continued system design and production without redesign constraints.

Key Parameters

Parameter	OPA2132PA Value	Unit	Substitution Relevance
Amplifier Type	J-FET	—	Critical: Determines input impedance and bias current characteristics
Number of Circuits	2	Channels	Critical: Functional requirement for dual-channel applications
Slew Rate	20	V/µs	Important: Affects signal fidelity in high-frequency transient response
Gain Bandwidth Product	8	MHz	Important: Determines frequency response and closed-loop bandwidth
Current - Input Bias	5	pA	Critical: J-FET advantage; very low bias current
Voltage - Input Offset	500	µV	Important: Affects DC accuracy and offset nulling requirements
Voltage - Supply Span (Min)	5	V	Critical: Minimum operating supply voltage
Voltage - Supply Span (Max)	36	V	Critical: Maximum operating supply voltage
Operating Temperature	−40 to 85	°C	Important: Defines thermal operating range
Package / Case	8-DIP (0.300", 7.62mm)	—	Critical: Physical and electrical compatibility with PCB layout
Mounting Type	Through Hole	—	Critical: Assembly process compatibility
Current - Supply	4 (×2 Channels)	mA	Important: Power consumption per channel
Current - Output / Channel	40	mA	Important: Output drive capability

Substitute Part Grouping Explanation

Substitution logic for the OPA2132PA is based on the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET (low input bias current characteristic)
Number of Circuits: 2 (dual-channel requirement)
Package / Case: 8-DIP through-hole (physical compatibility)
Voltage Supply Range: Minimum 5 V, Maximum 36 V (operational envelope)
Operating Temperature: −40°C to 85°C (thermal compatibility)

Secondary Compatibility Parameters:

Slew Rate: 20 V/µs (baseline; substitutes may vary ±50%)
Gain Bandwidth Product: 8 MHz (baseline; substitutes may vary ±50%)
Input Bias Current: 5 pA (J-FET characteristic; critical for low-bias applications)
Input Offset Voltage: 500 µV (baseline; substitutes may vary ±100%)

Substitutes are grouped into two categories:

Direct Electrical Equivalents (Same Amplifier Type - J-FET): Parts maintaining J-FET input stage, dual-channel configuration, and 8-DIP package with compatible supply ranges and temperature ratings.
Functional Alternatives (Different Amplifier Type - Audio): Parts with dual-channel configuration and 8-DIP package but different amplifier topology (Audio type), suitable only for applications where J-FET input characteristics are not mandatory.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Mounting	Status
OPA2132PA	Texas Instruments	J-FET	20	8	5	500	5	36	−40 to 85	8-DIP	Through Hole	Last Time Buy
OPA2132UA/2K5	Texas Instruments	J-FET	20	8	5	500	5	36	−40 to 85	8-SOIC	Surface Mount	Active
AD746JNZ	Analog Devices Inc.	J-FET	75	13	110	300	9	36	0 to 70	8-DIP	Through Hole	Active
LT1057ACN8#PBF	Analog Devices Inc.	J-FET	14	5	5	150	20	36	0 to 70	8-DIP	Through Hole	Active
LT1057CN8#PBF	Analog Devices Inc.	J-FET	13	5	7	200	20	36	0 to 70	8-DIP	Through Hole	Active
MUSES8820D	Nisshinbo Micro Devices Inc.	Audio	5	11	100	300	7	32	−40 to 85	8-DIP	Through Hole	Active
OP249GPZ	Analog Devices Inc.	J-FET	22	4.7	30	400	9	36	−40 to 85	8-DIP	Through Hole	Active
OP275GPZ	Analog Devices Inc.	Audio	22	9	100	1000	9	44	−40 to 85	8-DIP	Through Hole	Active

Engineering Selection Recommendations

Tier 1 - Recommended Direct Substitutes (J-FET Type, 8-DIP Through-Hole):

OP249GPZ (Analog Devices Inc.)
- Maintains J-FET input stage and dual-channel configuration
- 8-DIP through-hole package with identical footprint
- Operating temperature range −40°C to 85°C matches OPA2132PA
- Supply voltage range 9 V to 36 V (OPA2132PA minimum 5 V; OP249GPZ minimum 9 V)
- Slew rate 22 V/µs (10% higher than OPA2132PA)
- Gain bandwidth product 4.7 MHz (41% lower than OPA2132PA)
- Input bias current 30 pA (6× higher than OPA2132PA)
- Product Status: Active with 1316 pcs inventory
- Selection basis: Closest J-FET equivalent in through-hole package; acceptable for applications not requiring minimum 5 V supply or ultra-low bias current
AD746JNZ (Analog Devices Inc.)
- Maintains J-FET input stage and dual-channel configuration
- 8-DIP through-hole package with identical footprint
- Slew rate 75 V/µs (3.75× higher than OPA2132PA)
- Gain bandwidth product 13 MHz (63% higher than OPA2132PA)
- Input bias current 110 pA (22× higher than OPA2132PA)
- Operating temperature range 0°C to 70°C (narrower than OPA2132PA)
- Supply voltage range 9 V to 36 V (OPA2132PA minimum 5 V; AD746JNZ minimum 9 V)
- Product Status: Active with 1204 pcs inventory
- Selection basis: Higher performance J-FET option; suitable for applications requiring higher slew rate and bandwidth; not suitable for −40°C operation or 5 V minimum supply
LT1057ACN8#PBF (Analog Devices Inc.)
- Maintains J-FET input stage and dual-channel configuration
- 8-DIP through-hole package with identical footprint
- Input offset voltage 150 µV (70% lower than OPA2132PA)
- Input bias current 5 pA (matches OPA2132PA)
- Slew rate 14 V/µs (30% lower than OPA2132PA)
- Gain bandwidth product 5 MHz (38% lower than OPA2132PA)
- Supply voltage range 20 V to 36 V (OPA2132PA range 5 V to 36 V; LT1057ACN8#PBF minimum 20 V)
- Operating temperature range 0°C to 70°C (narrower than OPA2132PA)
- Product Status: Active with 2712 pcs inventory
- Selection basis: Excellent for low-offset applications; not suitable for 5 V to 19 V supply range or −40°C operation
LT1057CN8#PBF (Analog Devices Inc.)
- Maintains J-FET input stage and dual-channel configuration
- 8-DIP through-hole package with identical footprint
- Input offset voltage 200 µV (60% lower than OPA2132PA)
- Input bias current 7 pA (comparable to OPA2132PA)
- Slew rate 13 V/µs (35% lower than OPA2132PA)
- Gain bandwidth product 5 MHz (38% lower than OPA2132PA)
- Supply voltage range 20 V to 36 V (OPA2132PA range 5 V to 36 V; LT1057CN8#PBF minimum 20 V)
- Operating temperature range 0°C to 70°C (narrower than OPA2132PA)
- Product Status: Active with 1522 pcs inventory
- Selection basis: Similar to LT1057ACN8#PBF with slightly higher bias current; not suitable for 5 V to 19 V supply range or −40°C operation

Tier 2 - Surface-Mount Alternative (J-FET Type, 8-SOIC):

OPA2132UA/2K5 (Texas Instruments)
- Identical electrical specifications to OPA2132PA
- Dual-channel J-FET configuration
- 8-SOIC surface-mount package (different from 8-DIP through-hole)
- Product Status: Active with 20100 pcs inventory
- Selection basis: Electrical equivalent; requires PCB redesign for surface-mount assembly; suitable only if manufacturing process supports SMD assembly

Tier 3 - Functional Alternatives (Audio Type, 8-DIP Through-Hole):

OP275GPZ (Analog Devices Inc.)
- Audio amplifier type (not J-FET)
- Dual-channel configuration
- 8-DIP through-hole package with identical footprint
- Operating temperature range −40°C to 85°C matches OPA2132PA
- Supply voltage range 9 V to 44 V (OPA2132PA minimum 5 V; OP275GPZ minimum 9 V)
- Input bias current 100 nA (20,000× higher than OPA2132PA)
- Selection basis: Functional alternative only for applications where J-FET input characteristics are not required; not suitable for low-bias-current applications
MUSES8820D (Nisshinbo Micro Devices Inc.)
- Audio amplifier type (not J-FET)
- Dual-channel configuration
- 8-DIP through-hole package with identical footprint
- Operating temperature range −40°C to 85°C matches OPA2132PA
- Supply voltage range 7 V to 32 V (OPA2132PA range 5 V to 36 V; MUSES8820D maximum 32 V)
- Input bias current 100 nA (20,000× higher than OPA2132PA)
- Selection basis: Functional alternative only for applications where J-FET input characteristics are not required; not suitable for low-bias-current applications or 33 V to 36 V supply range

Selection Decision Matrix:

Minimum supply voltage requirement 5 V: OP249GPZ (J-FET, 9 V minimum) or MUSES8820D (Audio, 7 V minimum) are not suitable; OPA2132PA or OPA2132UA/2K5 required
Operating temperature −40°C required: OP249GPZ, OP275GPZ, or MUSES8820D acceptable; AD746JNZ, LT1057ACN8#PBF, LT1057CN8#PBF not suitable
Ultra-low input bias current (≤10 pA) required: OPA2132PA, LT1057ACN8#PBF, or LT1057CN8#PBF; AD746JNZ, OP249GPZ, OP275GPZ, MUSES8820D not suitable
Through-hole package required: All substitutes except OPA2132UA/2K5 acceptable
Supply voltage 20 V to 36 V only: LT1057ACN8#PBF or LT1057CN8#PBF acceptable; all others provide wider range

Frequently Asked Questions (FAQ)

Q1: Can OPA2132UA/2K5 replace OPA2132PA directly on the PCB?

A: No. OPA2132UA/2K5 uses an 8-SOIC surface-mount package, while OPA2132PA uses an 8-DIP through-hole package. The pinout is electrically equivalent, but the physical footprint and mounting method are incompatible. PCB redesign is required for surface-mount assembly. If through-hole assembly is mandatory, OPA2132UA/2K5 is not suitable.

Q2: What is the key difference between J-FET and Audio amplifier types in this comparison?

A: J-FET input amplifiers (OPA2132PA, AD746JNZ, LT1057ACN8#PBF, LT1057CN8#PBF, OP249GPZ) feature extremely low input bias current (5–110 pA range), making them suitable for high-impedance signal sources and precision measurement applications. Audio amplifiers (OP275GPZ, MUSES8820D) use bipolar input stages with input bias currents in the nanoampere range (100 nA), making them unsuitable for applications requiring ultra-low bias current but acceptable for general audio and signal conditioning applications.

Q3: Why does AD746JNZ have a narrower operating temperature range (0°C to 70°C) compared to OPA2132PA (−40°C to 85°C)?

A: Operating temperature range is determined by the semiconductor manufacturing process and device design. AD746JNZ is specified for commercial temperature range (0°C to 70°C), while OPA2132PA is specified for industrial temperature range (−40°C to 85°C). If operation below 0°C or above 70°C is required, AD746JNZ is not suitable.

Q4: Can LT1057ACN8#PBF operate at 5 V supply voltage like OPA2132PA?

A: No. LT1057ACN8#PBF has a minimum supply voltage of 20 V, while OPA2132PA operates from 5 V minimum. If the application requires 5 V to 19 V supply operation, LT1057ACN8#PBF is not suitable. OP249GPZ has a 9 V minimum supply, also incompatible with 5 V operation.

Q5: Is OP249GPZ a suitable substitute if the application requires slew rate ≥20 V/µs?

A: Yes, with qualification. OP249GPZ provides 22 V/µs slew rate, which exceeds the OPA2132PA baseline of 20 V/µs. However, OP249GPZ has a minimum supply voltage of 9 V (versus OPA2132PA at 5 V) and input bias current of 30 pA (versus OPA2132PA at 5 pA). Verify that the 9 V minimum supply and higher bias current are acceptable for the application before selection.

Q6: What is the impact of using MUSES8820D instead of OPA2132PA in a precision measurement circuit?

A: MUSES8820D is not suitable for precision measurement circuits requiring low input bias current. The input bias current of 100 nA is 20,000 times higher than OPA2132PA (5 pA), which will introduce significant measurement error in high-impedance signal paths. MUSES8820D is appropriate only for applications where input bias current is not a critical parameter, such as general audio signal conditioning.

Q7: Are all substitute parts RoHS3 compliant like OPA2132PA?

A: Yes. All substitute parts listed (OPA2132UA/2K5, AD746JNZ, LT1057ACN8#PBF, LT1057CN8#PBF, MUSES8820D, OP249GPZ, OP275GPZ) are RoHS3 compliant, matching the compliance status of OPA2132PA.

Q8: Which substitute provides the best balance of performance and availability?

A: OP249GPZ offers the best balance for applications not requiring 5 V minimum supply operation. It maintains J-FET input characteristics (30 pA bias current), provides 22 V/µs slew rate (exceeding OPA2132PA), operates across −40°C to 85°C temperature range, and has 1316 pcs inventory available. However, the 9 V minimum supply voltage must be verified as compatible with the application.

Q9: Can multiple substitute parts be used interchangeably in the same design?

A: No. Each substitute part has different electrical parameters (slew rate, gain bandwidth product, input bias current, supply voltage range, temperature range). Interchangeability is not guaranteed. The specific substitute must be selected based on the application's electrical requirements. Mixing different substitute parts in the same system may result in performance inconsistency or functional failure.

Q10: What is the inventory status for each substitute part?

A: OPA2132UA/2K5: 20100 pcs (highest availability); MUSES8820D: 2945 pcs; LT1057ACN8#PBF: 2712 pcs; OP275GPZ: 2990 pcs; OP249GPZ: 1316 pcs; AD746JNZ: 1204 pcs; LT1057CN8#PBF: 1522 pcs. OPA2132PA (Last Time Buy) has 4200 pcs remaining. For long-term production, OPA2132UA/2K5 offers the highest inventory buffer, though surface-mount assembly is required.

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