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TLV2784AIDRG4 Equivalent & Substitute Parts
Part Overview
The TLV2784AIDRG4 is a general purpose operational amplifier manufactured by Texas Instruments, configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as obsolete product status. Due to its obsolete classification, equivalent substitute parts from active manufacturers are necessary to ensure design continuity, supply chain reliability, and long-term component availability for new production runs and design updates.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | TLV2784AIDRG4 | — |
| Manufacturer | Texas Instruments | — |
| Category | Linear, Amplifiers | — |
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 5 | V/µs |
| Gain Bandwidth Product | 8 | MHz |
| Current - Input Bias | 2.5 | pA |
| Voltage - Input Offset | 250 | µV |
| Current - Supply | 650 | µA (x4 Channels) |
| Current - Output / Channel | 23 | mA |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 3.6 | V |
| Operating Temperature | -40 to 125 | °C |
| Product Status | Obsolete | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the TLV2784AIDRG4 is determined by the following critical parameters:
Mandatory Compatibility Criteria:
- Package type: 14-SOIC surface mount form factor
- Circuit configuration: 4 independent amplifier circuits
- Output architecture: Rail-to-rail output capability
- Mounting technology: Surface mount
Electrical Performance Parameters (Allowable Ranges):
- Supply voltage span must encompass or exceed the original 1.8 V to 3.6 V range
- Slew rate, gain bandwidth product, and output current drive capability determine functional equivalence
- Input bias current and input offset voltage affect precision and noise performance
- Operating temperature range must support -40°C to 125°C minimum
Compliance Requirements:
- RoHS3 compliance mandatory
- MSL rating of 1 (Unlimited) preferred for manufacturing flexibility
Substitute parts are grouped by their electrical performance tier relative to the original device, ensuring that selected alternatives meet or exceed the original specifications within the defined supply voltage and temperature operating windows.
Parameter Comparison
| Parameter | TLV2784AIDRG4 | AD8604ARZ-REEL7 | MCP6284-E/SL | MCP6484-E/SL | MCP6494-E/SL | LMV824DR2G |
|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Analog Devices Inc. | Microchip Technology | Microchip Technology | Microchip Technology | onsemi |
| Amplifier Type | General Purpose | CMOS | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Package / Case | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Slew Rate (V/µs) | 5 | 6 | 2.5 | 2.7 | 6 | 2 |
| Gain Bandwidth Product (MHz) | 8 | 8.4 | 5 | 4 | 7.5 | 5.6 |
| Current - Input Bias (pA) | 2.5 | 0.2 | 1 | 1 | 1 | 119 nA |
| Voltage - Input Offset (µV) | 250 | 80 | 3000 | 1500 | 1500 | 1000 |
| Current - Supply (µA x4 Channels) | 650 | 750 | 450 | 240 | 530 | 1000 |
| Current - Output / Channel (mA) | 23 | 50 | 25 | 12 | 15 | 45 |
| Voltage - Supply Span Min (V) | 1.8 | 2.7 | 2.2 | 2.2 | 2.4 | 2.7 |
| Voltage - Supply Span Max (V) | 3.6 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Operating Temperature (°C) | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
Primary Substitute: AD8604ARZ-REEL7
The AD8604ARZ-REEL7 from Analog Devices Inc. is the recommended primary substitute. This device maintains active product status with full ROHS3 compliance and MSL rating of 1 (Unlimited). The AD8604ARZ-REEL7 offers superior electrical performance with higher slew rate (6 V/µs versus 5 V/µs), improved gain bandwidth product (8.4 MHz versus 8 MHz), and significantly lower input bias current (0.2 pA versus 2.5 pA). The extended supply voltage range (2.7 V to 5.5 V) provides broader application flexibility. Output current capability is enhanced at 50 mA per channel. The 14-SOIC package and surface mount configuration provide direct mechanical compatibility.
Secondary Substitute: MCP6494-E/SL or MCP6494T-E/SL
The MCP6494 series from Microchip Technology offers active product status with ROHS3 compliance and MSL rating of 1 (Unlimited). These devices provide slew rate of 6 V/µs and gain bandwidth product of 7.5 MHz, closely matching the original performance envelope. Supply voltage range extends to 5.5 V maximum. The MCP6494-E/SL is packaged in tube format, while MCP6494T-E/SL is supplied in tape and reel format. Both maintain the 14-SOIC package specification and -40°C to 125°C operating temperature range.
Tertiary Substitute: MCP6284-E/SL or MCP6284T-E/SL
The MCP6284 series from Microchip Technology provides active product status with ROHS3 compliance and MSL rating of 1 (Unlimited). These devices deliver slew rate of 2.5 V/µs and gain bandwidth product of 5 MHz. Supply voltage range extends to 5.5 V maximum. The MCP6284-E/SL is packaged in tube format, while MCP6284T-E/SL is supplied in tape and reel format. Both maintain the 14-SOIC package specification and -40°C to 125°C operating temperature range. This option is suitable for applications where lower slew rate and reduced power consumption (450 µA total) are acceptable.
Not Recommended: LMV824DR2G
The LMV824DR2G from onsemi does not meet the full operating temperature requirement, supporting only -40°C to 85°C versus the required -40°C to 125°C. Additionally, the MSL rating of 3 (168 Hours) introduces moisture sensitivity constraints during manufacturing and storage. Higher supply current consumption (1 mA total) and lower slew rate (2 V/µs) further limit its suitability as a direct substitute.
Frequently Asked Questions (FAQ)
Q: Can the AD8604ARZ-REEL7 be used as a direct pin-for-pin replacement for the TLV2784AIDRG4?
A: Yes. Both devices feature identical 14-SOIC package geometry with matching pin assignments for 4-circuit rail-to-rail amplifier configurations. The AD8604ARZ-REEL7 maintains surface mount compatibility and requires no PCB layout modifications.
Q: What is the primary difference between MCP6494-E/SL and MCP6284-E/SL?
A: The MCP6494 series provides higher slew rate (6 V/µs versus 2.5 V/µs) and higher gain bandwidth product (7.5 MHz versus 5 MHz), making it suitable for higher-speed signal processing applications. The MCP6284 series offers lower power consumption (450 µA versus 530 µA total supply current), making it preferable for battery-powered or power-constrained designs.
Q: Does the extended supply voltage range of substitute parts affect circuit design?
A: The substitute parts support supply voltages up to 5.5 V, compared to the original 3.6 V maximum. Designs operating within the original 1.8 V to 3.6 V range require no modification. Designs utilizing the extended voltage range must verify that all connected components and signal levels are rated for the higher supply voltage.
Q: What is the significance of MSL rating 1 (Unlimited) versus MSL rating 3?
A: MSL rating 1 (Unlimited) indicates the component has no moisture sensitivity constraints and can be stored indefinitely without special desiccant packaging or baking procedures. MSL rating 3 (168 Hours) requires the component to be used within 168 hours of package opening or requires thermal baking to restore moisture absorption capacity. For high-volume manufacturing environments, MSL rating 1 is preferred to eliminate process constraints.
Q: Are there packaging format differences between tube and tape & reel options?
A: Tube packaging (E/SL designation) is suitable for lower-volume applications and manual assembly processes. Tape & reel packaging (T-E/SL designation) is optimized for automated pick-and-place assembly equipment and high-volume production. Electrical specifications and performance characteristics are identical between packaging formats; selection depends on manufacturing process requirements.
Q: What is the impact of input bias current differences on circuit performance?
A: The AD8604ARZ-REEL7 exhibits input bias current of 0.2 pA, significantly lower than the original 2.5 pA. Lower input bias current reduces errors in high-impedance signal conditioning circuits and precision measurement applications. For most general-purpose amplifier applications, this difference is negligible. Applications with input impedances exceeding 1 MΩ benefit from the lower bias current specification.
Q: Can the LMV824DR2G be used in applications requiring operation above 85°C?
A: No. The LMV824DR2G is specified for operation only to 85°C maximum. Applications requiring the full -40°C to 125°C temperature range must use alternative substitutes such as AD8604ARZ-REEL7, MCP6494 series, or MCP6284 series.
Q: How do slew rate differences affect signal fidelity?
A: Slew rate determines the maximum rate of voltage change the amplifier can produce. The original TLV2784AIDRG4 specifies 5 V/µs. The AD8604ARZ-REEL7 and MCP6494 series provide 6 V/µs, enabling faster signal transitions. The MCP6284 series provides 2.5 V/µs, suitable for lower-frequency applications. Selection depends on the maximum signal frequency and required output slew rate in the target application.
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