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MAX4234ASD-T Equivalent & Substitute Parts Reference
Part Overview
The MAX4234ASD-T is a CMOS quad-channel operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, packaged in 14-SOIC surface mount configuration. This device features rail-to-rail output capability and is designed for low-power, general-purpose amplification applications across industrial and consumer electronics.
The MAX4234ASD-T is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this amplifier topology.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 4 | Channels |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 10 | V/µs |
| Gain Bandwidth Product | 10 | MHz |
| Current - Input Bias | 1 | pA |
| Voltage - Input Offset | 850 | µV |
| Current - Supply (Total) | 1.2 | mA (x4 Channels) |
| Current - Output / Channel | 200 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX4234ASD-T is determined by the following critical parameters:
Primary Substitution Criteria:
- Quad-channel (4 circuits) operational amplifier architecture
- 14-SOIC surface mount package with 0.154" (3.90mm) width
- Rail-to-rail output capability
- Supply voltage range: 2.7 V to 5.5 V minimum overlap
- Operating temperature range: -40°C to 125°C minimum coverage
- ROHS3 compliance and MSL 1 rating
Secondary Performance Parameters:
- Slew rate ≥ 4.5 V/µs (acceptable for most applications)
- Gain bandwidth product ≥ 5.5 MHz (acceptable for most applications)
- Input bias current ≤ 15 nA (acceptable for most applications)
- Input offset voltage ≤ 2 mV (acceptable for most applications)
Substitute parts are grouped into two categories: Direct Packaging Equivalents (identical packaging and product status) and Functional Equivalents (compatible electrical performance with different product status or packaging options).
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) | Temp Range (°C) | Product Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MAX4234ASD-T | Analog Devices / Maxim | CMOS | 10 | 10 | 1 | 850 | 1.2 | 200 | -40 to 125 | Obsolete | 14-SOIC |
| MAX4234ASD+T | Analog Devices / Maxim | CMOS | 10 | 10 | 1 | 850 | 1.2 | 200 | -40 to 125 | Active | 14-SOIC (TR) |
| OPA4343UA | Burr Brown | CMOS | 6 | 5.5 | 0.2 | 2000 | 0.85 | 50 | -40 to 85 | Active | 14-SOIC |
| TSV914AIDT | STMicroelectronics | General Purpose | 4.5 | 8 | 1 | 1500 | 0.78 | 35 | -40 to 125 | Active | 14-SO (CT) |
| TSV914IDT | STMicroelectronics | General Purpose | 4.5 | 8 | 1 | 100 | 0.78 | 35 | -40 to 125 | Active | 14-SO (CT) |
| TSV914IYDT | STMicroelectronics | General Purpose | 4.5 | 8 | 1 | 100 | 0.78 | 35 | -40 to 125 | Active | 14-SO (TR) |
| TSV994AIDT | STMicroelectronics | General Purpose | 10 | 20 | 1 | 100 | 0.82 | 35 | -40 to 125 | Active | 14-SO (CT) |
| TSV994IDT | STMicroelectronics | General Purpose | 10 | 20 | 1 | 100 | 0.82 | 35 | -40 to 125 | Active | 14-SO (CT) |
| TSV994IYDT | STMicroelectronics | General Purpose | 10 | 20 | 1 | 100 | 0.82 | 35 | -40 to 125 | Active | 14-SO (TR) |
| LMV324ID | Texas Instruments | General Purpose | 1 | 1 | 15000 | 1700 | 0.41 | 40 | -40 to 125 | Last Time Buy | 14-SOIC (Tube) |
Engineering Selection Recommendations
Direct Replacement (Identical Electrical Performance):
MAX4234ASD+T is the active production equivalent of MAX4234ASD-T. Both devices share identical electrical specifications, supply voltage range, temperature operating range, and 14-SOIC packaging. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard). MAX4234ASD+T is recommended for new designs and ongoing production requiring exact electrical equivalence.
High-Performance Substitutes (Enhanced Specifications):
TSV994AIDT, TSV994IDT, and TSV994IYDT (STMicroelectronics) provide superior slew rate (10 V/µs, matching MAX4234ASD-T) and gain bandwidth product (20 MHz, double the original). These devices maintain 1 pA input bias current, -40°C to 125°C operating range, and ROHS3 compliance. All three variants carry AEC-Q100 automotive qualification. Packaging differences exist: AIDT and IDT use Cut Tape format, while IYDT uses Tape & Reel. These substitutes are suitable for applications requiring higher bandwidth performance within the same supply voltage envelope.
Moderate-Performance Substitutes (Reduced Specifications):
TSV914AIDT, TSV914IDT, and TSV914IYDT (STMicroelectronics) offer reduced slew rate (4.5 V/µs) and gain bandwidth product (8 MHz) compared to the original. Input bias current remains at 1 pA, and operating temperature range extends to -40°C to 125°C. All variants include AEC-Q100 automotive qualification and ROHS3 compliance. These substitutes are appropriate for applications where the original performance specifications exceed system requirements.
Lower-Performance Substitute (Reduced Specifications, Last Time Buy Status):
LMV324ID (Texas Instruments) operates at significantly reduced performance levels: 1 V/µs slew rate, 1 MHz gain bandwidth product, and 15 nA input bias current. Operating temperature range matches the original (-40°C to 125°C), and ROHS3 compliance is maintained. Product status is Last Time Buy, indicating limited future availability. This substitute is suitable only for legacy system maintenance where performance margins are substantial.
Lower-Performance Substitute (Reduced Temperature Range):
OPA4343UA (Burr Brown) provides CMOS amplifier architecture with 6 V/µs slew rate and 5.5 MHz gain bandwidth product. Operating temperature range is limited to -40°C to 85°C, which does not cover the full -40°C to 125°C specification of the original. This device is suitable only for applications operating within the reduced temperature envelope. Product status is Active, ensuring continued availability.
Frequently Asked Questions (FAQ)
Q: Can MAX4234ASD+T be used as a direct replacement for MAX4234ASD-T?
A: Yes. MAX4234ASD+T is the active production equivalent with identical electrical specifications, supply voltage range, temperature operating range, and 14-SOIC package. The only differences are product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard). Both devices are pin-compatible and functionally equivalent.
Q: What is the primary difference between TSV994 and TSV914 variants?
A: TSV994 devices provide 10 V/µs slew rate and 20 MHz gain bandwidth product, matching or exceeding the original MAX4234ASD-T performance. TSV914 devices operate at 4.5 V/µs slew rate and 8 MHz gain bandwidth product. Both families maintain 1 pA input bias current and -40°C to 125°C operating range. Selection depends on application bandwidth requirements.
Q: Are TSV914 and TSV994 devices available in different packaging formats?
A: Yes. Both families are available in three packaging variants: AIDT (Cut Tape & Digi-Reel), IDT (Cut Tape & Digi-Reel), and IYDT (Tape & Reel). All three variants use 14-SO package with identical electrical specifications. Packaging selection depends on manufacturing process requirements and inventory management practices.
Q: Does LMV324ID meet the full operating temperature specification of MAX4234ASD-T?
A: No. LMV324ID operates from -40°C to 125°C (TA), matching the original temperature range. However, LMV324ID exhibits significantly reduced electrical performance: 1 V/µs slew rate, 1 MHz gain bandwidth product, and 15 nA input bias current. This device is suitable only for legacy system maintenance where performance margins are substantial. Product status is Last Time Buy, indicating limited future availability.
Q: Does OPA4343UA cover the full operating temperature range of MAX4234ASD-T?
A: No. OPA4343UA operates from -40°C to 85°C, which does not cover the upper temperature limit of 125°C specified for MAX4234ASD-T. This device is suitable only for applications operating within the reduced temperature envelope. OPA4343UA provides CMOS amplifier architecture with 6 V/µs slew rate and 5.5 MHz gain bandwidth product. Product status is Active.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed in this reference are ROHS3 compliant. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all devices, matching the original MAX4234ASD-T specification.
Q: Which substitute parts carry automotive qualification?
A: TSV914AIDT, TSV914IDT, TSV914IYDT, TSV994AIDT, TSV994IDT, and TSV994IYDT all carry AEC-Q100 automotive qualification. These devices are suitable for automotive and industrial applications requiring formal qualification documentation.
Q: What is the inventory status of substitute parts?
A: MAX4234ASD+T has 2,900 units in stock. TSV994AIDT has the highest inventory at 55,300 units. TSV994IDT has 21,422 units, TSV914IDT has 42,200 units, and TSV914IYDT has 18,668 units. OPA4343UA has 20,450 units. LMV324ID has 3,200 units. TSV914AIDT has 1,132 units, and TSV994IYDT has 2,373 units. Inventory levels support ongoing production requirements.
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