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AD744JNZ Equivalent & Substitute Parts
Part Overview
The AD744JNZ is a J-FET input operational amplifier manufactured by Analog Devices Inc., housed in an 8-DIP through-hole package. This linear amplifier circuit is classified as Active product status and is ROHS3 compliant. The AD744JNZ serves applications requiring low input bias current, low input offset voltage, and moderate slew rate performance in single-supply or dual-supply configurations. Substitute parts are necessary when addressing inventory constraints, extended temperature range requirements, or specific performance optimization for particular circuit topologies.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 1 | — |
| Slew Rate | 75 | V/µs |
| Gain Bandwidth Product (-3dB Bandwidth) | 13 | MHz |
| Current - Input Bias | 30 | pA |
| Voltage - Input Offset | 300 | µV |
| Current - Supply | 3.5 | mA |
| Current - Output / Channel | 25 | mA |
| Voltage - Supply Span (Min) | 9 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | 0 to 70 | °C |
| Package / Case | 8-DIP (0.300", 7.62mm) | — |
| Mounting Type | Through Hole | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the AD744JNZ is determined by electrical and mechanical compatibility across the following critical parameters:
Primary Substitution Criteria:
- Amplifier Type: J-FET topology required for input bias current and offset voltage characteristics
- Package / Case: 8-DIP (0.300", 7.62mm) through-hole mounting
- Number of Circuits: Single circuit configuration
- Slew Rate: Minimum 45 V/µs acceptable
- Gain Bandwidth Product: 10 MHz or greater
- Current - Input Bias: 30 pA or lower
- Voltage - Input Offset: 300 µV or lower
- Voltage - Supply Span: Minimum 9 V to 36 V maximum overlap required
- Operating Temperature: 0°C to 70°C minimum coverage
- RoHS Status: ROHS3 Compliant
Substitute parts are grouped into two categories:
Category A - J-FET Amplifiers (Direct Topology Match): TLE2071ACP, TLE2071AIP, TLE2081ACP, TLE2081AIP, TLE2081IP, and LT1122CCN8#PBF maintain J-FET input architecture with compatible electrical performance.
Category B - Alternative Topology (Voltage Feedback): LT1354CN8#PBF provides voltage feedback amplifier topology with enhanced slew rate and reduced supply current, suitable for applications where input bias current tolerance is relaxed.
Category C - General Purpose (Obsolete Status): OPA627AP is classified as Obsolete and is included for reference only.
Parameter Comparison
| Parameter | AD744JNZ | LT1122CCN8#PBF | LT1354CN8#PBF | OPA627AP | TLE2071ACP | TLE2071AIP | TLE2081ACP | TLE2081AIP | TLE2081IP |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Type | J-FET | J-FET | Voltage Feedback | General Purpose | J-FET | J-FET | J-FET | J-FET | J-FET |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Slew Rate (V/µs) | 75 | 75 | 400 | 55 | 45 | 45 | 45 | 45 | 45 |
| Gain Bandwidth Product (MHz) | 13 | 13 | 12 | 16 | 10 | 10 | 10 | 10 | 10 |
| Current - Input Bias (pA) | 30 | 12 | 80 nA | 2 | 20 | 20 | 20 | 20 | 20 |
| Voltage - Input Offset (µV) | 300 | 130 | 300 | 130 | 470 | 470 | 470 | 470 | 490 |
| Current - Supply (mA) | 3.5 | 7.8 | 1 | 7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 |
| Current - Output / Channel (mA) | 25 | — | 30 | 45 | 48 | 48 | 48 | 48 | 48 |
| Voltage - Supply Span Min (V) | 9 | 10 | 5 | 9 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| Voltage - Supply Span Max (V) | 36 | 36 | 30 | 36 | 38 | 38 | 38 | 38 | 38 |
| Operating Temperature (°C) | 0 to 70 | -40 to 85 | 0 to 70 | -25 to 85 | 0 to 70 | -40 to 85 | 0 to 70 | -40 to 85 | -40 to 85 |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Obsolete | Active | Active | Last Time Buy | Active | Active |
Engineering Selection Recommendations
Recommended Substitutes (Active Status, Full Compatibility):
TLE2071ACP, TLE2071AIP, TLE2081AIP, and TLE2081IP are the primary substitute options. These parts maintain J-FET amplifier topology, 8-DIP package configuration, and supply voltage compatibility. TLE2071AIP and TLE2081AIP extend operating temperature range to -40°C to 85°C, providing broader environmental coverage than the AD744JNZ. All recommended substitutes are ROHS3 compliant and carry Active product status.
Secondary Substitutes (Conditional Compatibility):
LT1122CCN8#PBF is an Active J-FET amplifier with superior input bias current (12 pA) and input offset voltage (130 µV) performance. However, minimum supply voltage is 10 V, requiring verification that circuit design accommodates this constraint. Extended operating temperature range (-40°C to 85°C) is available.
LT1354CN8#PBF is an Active voltage feedback amplifier offering significantly higher slew rate (400 V/µs) and lower supply current (1 mA). This topology differs from J-FET architecture; input bias current is 80 nA, substantially higher than AD744JNZ. Maximum supply voltage is limited to 30 V. Substitution is valid only for applications where input bias current tolerance is relaxed and supply voltage does not exceed 30 V.
Not Recommended:
OPA627AP carries Obsolete product status and is not recommended for new designs or long-term production applications.
TLE2081ACP is classified as Last Time Buy and should not be selected for applications requiring sustained component availability.
Frequently Asked Questions (FAQ)
Q: Can TLE2081AIP directly replace AD744JNZ in existing circuit boards?
A: Yes. Both parts use identical 8-DIP (0.300", 7.62mm) through-hole package configuration and pinout. Electrical parameters are compatible within the specified operating ranges. TLE2081AIP extends operating temperature to -40°C to 85°C, providing enhanced environmental coverage.
Q: What is the primary difference between J-FET and voltage feedback amplifier topologies?
A: J-FET amplifiers (AD744JNZ, TLE2071ACP, TLE2081AIP) feature extremely low input bias current (20-30 pA range) and are suitable for high-impedance signal sources. Voltage feedback amplifiers (LT1354CN8#PBF) exhibit higher input bias current (80 nA) but deliver superior slew rate (400 V/µs) and lower supply current. Topology selection depends on circuit requirements for input impedance and signal bandwidth.
Q: Is LT1122CCN8#PBF compatible with 9 V supply voltage applications?
A: No. LT1122CCN8#PBF requires minimum 10 V supply voltage. Applications designed for 9 V operation must use AD744JNZ, TLE2071ACP, TLE2071AIP, TLE2081ACP, TLE2081AIP, or TLE2081IP.
Q: What is the significance of "Last Time Buy" product status for TLE2081ACP?
A: Last Time Buy status indicates the manufacturer has announced end-of-life for this part number. Existing inventory may be available, but future procurement is not guaranteed. For new designs or applications requiring sustained component supply, select Active status alternatives such as TLE2081AIP or TLE2081IP.
Q: Can OPA627AP be used as a substitute for the AD744JNZ?
A: OPA627AP carries Obsolete product status and is not recommended. Although electrical parameters are compatible, obsolete parts present supply chain risk and are unsuitable for production applications.
Q: What are the thermal operating range implications when selecting between AD744JNZ and TLE2071AIP?
A: AD744JNZ operates from 0°C to 70°C. TLE2071AIP extends this range to -40°C to 85°C. Selection depends on application environment. Industrial or automotive applications requiring extended temperature coverage should specify TLE2071AIP or TLE2081AIP.
Q: Is LT1354CN8#PBF suitable for applications requiring 36 V supply voltage?
A: No. LT1354CN8#PBF maximum supply voltage is 30 V. Applications requiring 36 V operation must use J-FET amplifiers: AD744JNZ, LT1122CCN8#PBF, TLE2071ACP, TLE2071AIP, TLE2081ACP, TLE2081AIP, or TLE2081IP.
Q: What is the input bias current difference between AD744JNZ and LT1122CCN8#PBF?
A: AD744JNZ specifies 30 pA input bias current. LT1122CCN8#PBF specifies 12 pA. LT1122CCN8#PBF provides superior input bias current performance, reducing errors in high-impedance signal conditioning applications. However, minimum supply voltage requirement of 10 V must be verified for circuit compatibility.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed carry ROHS3 Compliant status, meeting environmental and regulatory requirements equivalent to the AD744JNZ.
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