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Texas Instruments TL3472CD
- Part No.:
- TL3472CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL3472CD.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,259
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Product details
Overview
TL3472CD from Texas Instruments is a dual, high-slew-rate operational amplifier optimized for single-supply operation across 4V to 36V. It delivers 4.5MHz gain-bandwidth product, 2μs settling time to 0.1%, and rail-to-rail input common-mode range including ground - enabling precision signal conditioning in industrial sensor interfaces and 24V PLC analog front-ends.
For engineers reviewing the TL3472CD datasheet, TL3472CD pinout, TL3472CD application, or TL3472CD equivalent, key selection criteria include its SOIC-8 package, ±15V or single 5V–36V supply flexibility, low 0.56mA/channel quiescent current, and verified performance at 0°C to 70°C ambient temperature.
Technical Context
The TL3472CD implements a bipolar-input, internally compensated two-stage op-amp architecture with differential input stage featuring 540GΩ input resistance and 10pF input capacitance. Its output stage provides ±75mA short-circuit current capability and supports capacitive loads up to 300pF while maintaining ≥50° phase margin.
Designed for stable unity-gain operation, it achieves 85kHz power bandwidth at 20VPP, 10.8nV/√Hz input voltage noise, and 2fA/√Hz input current noise - making it suitable for medium-speed, low-noise transducer amplification where DC accuracy and transient fidelity are jointly critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 4.5MHz - ensures stable closed-loop gain ≥10 at 450kHz, supporting anti-aliasing filter design up to ~200kHz. |
| Settling time (0.1%) | 2μs - enables accurate sampling of 12-bit ADC inputs with ≤1LSB error after step transitions in data acquisition systems. |
| Supply voltage range | 4V to 36V single supply - eliminates need for negative rail in 24V industrial I/O modules and battery-powered instrumentation. |
| Input offset voltage (max) | 12mV over 0°C–70°C - sets worst-case DC error floor in uncalibrated 10-bit sensor signal chains. |
| Slew rate (positive) | 10V/μs - supports clean amplification of 1VPP signals up to ~1.6MHz without slew-induced distortion. |
| Common-mode input range | Includes VCC− (ground) - allows direct interfacing to 0–5V sensors without level-shifting circuitry. |
| Quiescent current per channel | 0.56mA typical - enables dual-channel amplification in space-constrained, thermally sensitive applications like handheld meters. |
Pinout & Package
TL3472CD is housed in an 8-pin SOIC (D) package measuring 4.9mm × 3.9mm with 1.27mm lead pitch and 1.75mm max height. The package complies with JEDEC MS-012 variation AA and is RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output 1 | Amplified output of Channel 1; capable of sourcing/sinking ±75mA with short-circuit protection. |
| 1IN– | Inverting input | Differential input node for Channel 1; accepts common-mode voltages down to VCC− (ground). |
| 1IN+ | Non-inverting input | Differential input node for Channel 1; matched impedance to 1IN– for optimal CMRR performance. |
| GND | Ground reference | Return path for both channels; serves as VCC− in single-supply configurations. |
| 2IN+ | Non-inverting input | Differential input node for Channel 2; electrically isolated from Channel 1 with 101dB channel separation. |
| 2IN– | Inverting input | Differential input node for Channel 2; shares same input stage topology and biasing as Channel 1. |
| 2OUT | Output 2 | Amplified output of Channel 2; independent operation allows dual-path signal processing without crosstalk. |
| VCC+ | Positive supply | Main power terminal; supports 4V–36V single supply or ±18V split supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation from 4V | Enables direct interface to 3.3V/5V microcontrollers and 24V fieldbus systems without charge pumps or dual rails. |
| Input common-mode range includes ground | Eliminates level-shifter requirements for 0–VREF sensor outputs such as thermocouples or resistive bridges. |
| Output short-circuit protection | Prevents latch-up or thermal runaway during accidental output shorts in motor drive feedback or actuator control loops. |
| Low input bias current (0.01nA typ) | Minimizes voltage error across high-impedance sources like pH electrodes or photodiode transimpedance networks. |
| High CMRR (65–97dB) | Maintains signal integrity in noisy industrial environments by rejecting common-mode interference on sensor cables. |
Applications
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Analog Input Modules |
|---|---|
Use Scenario: Amplifying low-level mV outputs from RTDs, strain gauges, or pressure transducers in factory-floor equipment. IC Role / Device Role / Timing Role: Dual-channel precision amplifier providing gain, filtering, and level-shifting before 12-bit ADC conversion. Use Value: 12mV max input offset and 10.8nV/√Hz noise ensure ≤0.1% measurement error across 0–100°C temperature ranges. |
Use Scenario: Isolating and scaling 4–20mA loop signals in modular I/O cards for distributed control systems. IC Role / Device Role / Timing Role: Current-to-voltage converter and buffer driving multiplexed ADC inputs with fast settling for multi-channel scanning. Use Value: 2μs 0.1% settling enables full 16-channel scan rates >1kSPS while maintaining linearity under varying load conditions. |
| DC Motor Current Sensing | Battery-Powered Test Equipment |
Use Scenario: Measuring bidirectional motor phase currents using shunt resistors in H-bridge drives. IC Role / Device Role / Timing Role: High-speed, rail-to-rail input amplifier capturing current spikes during PWM switching transitions. Use Value: 10V/μs slew rate and 4.5MHz GBW preserve pulse fidelity for real-time overcurrent detection within <1μs response window. |
Use Scenario: Building portable multimeters or handheld oscilloscope front-ends requiring low power and wide dynamic range. IC Role / Device Role / Timing Role: Dual-channel programmable gain amplifier (PGA) stage preceding precision ADC and microcontroller. Use Value: 0.56mA/channel quiescent current extends battery life to >20 hours on two AA cells while maintaining 10-bit ENOB performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34072DR2G | Higher 4.5MHz GBW but higher 1.8mA/channel quiescent current; no guaranteed 0°C–70°C operation for C-grade variants. | Less suitable for battery-powered designs; requires tighter thermal management in dense PCB layouts. | Prefer TL3472CD when single-supply ground-referenced input and ultra-low IQ are mandatory. |
| LM2904DT | Lower 1.2MHz GBW and 0.6V/μs slew rate; wider −40°C to 125°C temp range but 7mV max VIO. | Better for automotive under-hood use; insufficient for >100kHz signal paths or fast-settling data acquisition. | Choose TL3472CD when bandwidth, speed, and input-range flexibility outweigh extended temperature needs. |
Compared with MC34072DR2G and LM2904DT, the TL3472CD uniquely balances 4.5MHz bandwidth, 2μs settling, ground-sensing inputs, and sub-1mA quiescent current - making it the optimal dual op-amp for cost-sensitive, single-supply industrial signal chains requiring both speed and DC precision.
Availability
TL3472CD is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC analog input modules, and DC motor current sensing requiring stable component supply across production lifecycles.
Supply support for TL3472CD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on industrial, automotive, and power management applications.
The TL3472CD belongs to TI's legacy precision op-amp portfolio designed specifically for cost-sensitive, single-supply industrial signal conditioning - prioritizing ground-referenced input operation, robust output drive, and reliable performance across extended voltage ranges.
FAQ
What is the operating temperature range for TL3472CD?
The TL3472CD is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade specification is confirmed in Section 4.2 Recommended Operating Conditions of the official datasheet (SLOS200H), and applies specifically to the TL3472CD variant - distinct from the TL3472ID (-40°C to 105°C) version. Thermal derating is required above 70°C ambient to maintain reliability.
Does TL3472CD support true single-supply operation with input signals at ground potential?
Yes, the TL3472CD supports true single-supply operation with input common-mode voltage extending to VCC− (ground). As specified in Table 4-2 and Figure 3-1, its input stage includes ground in the common-mode range - enabling direct connection of 0V-referenced sensors without external level-shifting circuitry. This behavior is explicitly validated for the TL3472CD in the "Wide input common-mode range includes ground" feature list.
What is the maximum capacitive load the TL3472CD can drive while remaining stable?
The TL3472CD maintains stability with up to 300pF capacitive load, as verified in Section 4.4 Operating Characteristics where phase margin is specified at 50° under CL = 300pF test conditions. Driving larger capacitive loads may require external isolation resistors or compensation networks - a design consideration explicitly documented for TL3472CD in the datasheet's stability analysis.
Is TL3472CD pin-compatible with MC34072 or LM2904?
No, TL3472CD is not pin-compatible with MC34072 or LM2904. While all three are dual op-amps in SOIC-8 packages, their pinouts differ: TL3472CD uses GND at Pin 4 and VCC+ at Pin 8, whereas MC34072 places VCC− at Pin 4 and VCC+ at Pin 8, and LM2904 assigns VCC− to Pin 4 and VCC+ to Pin 8 but swaps inverting/non-inverting inputs between channels. Direct substitution would cause functional failure without PCB revision.
What is the typical input bias current of TL3472CD and why does it matter?
The TL3472CD has a typical input bias current of 0.01nA (10pA) at 25°C, with a maximum of 700nA across 0°C–70°C. This ultra-low value minimizes voltage drop across high-impedance sensor elements - critical for applications like photodiode amplification or high-value resistor-based voltage dividers where even nanoampere-level leakage introduces measurable offset errors in the TL3472CD signal path.
TL3472CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 3.5mA (x2 Channels)
- Current - Output / Channel:
- 34 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL3472CD FAQ
1.How can I place an order for TL3472CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL3472CD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TL3472CD reliable?
The price and inventory of TL3472CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL3472CD is usually 5 days.
3.What payment methods are accepted for TL3472CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL3472CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL3472CD?
TL3472CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL3472CD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TL3472CD?
For technical support, including TL3472CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL3472CD requirements.
6.How does Aetrix verify that TL3472CD is sourced from the original manufacturer or authorized distributors?
All TL3472CD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL3472CD meets industry standards.
7.What is the process for return or replacement of TL3472CD?
All TL3472CD units undergo pre-shipment inspection (PSI). If there is an issue with TL3472CD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TL3472CD part is unused and in its original packaging.
Return procedure for TL3472CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL3472CD Tags
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