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Texas Instruments TLV2785CDR
- Part No.:
- TLV2785CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2785CDR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,718
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Product details
Overview
TLV2785CDR from Texas Instruments is a quad rail-to-rail input/output operational amplifier optimized for low-voltage, low-power precision signal conditioning. It operates from 1.8 V to 3.6 V, delivers 8 MHz gain-bandwidth, 4.8 V/µs slew rate at 2.7 V, and draws only 650 µA per channel - enabling high-speed data acquisition in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the TLV2785CDR datasheet, TLV2785CDR pinout, TLV2785CDR application, or TLV2785CDR equivalent, key selection criteria include its rail-to-rail I/O swing down to 1.8 V supply, −40°C to 125°C industrial temperature range (C-suffix variant rated 0°C to 70°C), shutdown capability, and TSSOP-16 package compatibility with high-density PCB layouts.
Technical Context
The TLV2785CDR implements a CMOS input stage with 2.5 pA typical input bias current and rail-to-rail output stage capable of sourcing/sinking ±10 mA. Its internal architecture supports stable unity-gain operation with 58° phase margin into 2 kΩ//25 pF loads, and features independent shutdown control for channels 1/2 and 3/4.
It achieves 9 nV/√Hz input voltage noise at 10 kHz and 0.08% THD+N at 10 kHz with AV = 10, making it suitable for driving 12-bit to 14-bit SAR ADCs without degrading SNR. The device maintains 8 MHz bandwidth across 1.8–3.6 V supply and exhibits VICR from −0.2 V to VDD+0.2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct operation from two alkaline or rechargeable cells; avoids need for LDO regulation in portable systems. |
| Gain-Bandwidth Product | 8 MHz - supports closed-loop gains up to 8× at 1 MHz or unity gain at 8 MHz for anti-aliasing filter drivers and fast-settling buffers. |
| Slew Rate | 4.8 V/µs at VDD = 2.7 V - ensures ≤2.4 µs 0.01% settling for 1 V step, critical for multiplexed data acquisition front-ends. |
| Input Offset Voltage | 3000 µV max (C-temp) - allows DC-coupled sensor amplification with <0.3% error at unity gain with 1 V output span. |
| Supply Current / Channel | 650 µA typical - total quiescent draw of 2.6 mA for all four op-amps, extending battery life in always-on monitoring nodes. |
| Input Noise Voltage | 9 nV/√Hz at 10 kHz - preserves dynamic range when amplifying low-level transducer signals before ADC digitization. |
| Rail-to-Rail I/O | Input common-mode range: −0.2 V to VDD+0.2 V; output swing within 180 mV of rails at 1.8 V - maximizes usable output headroom in low-voltage systems. |
| Shutdown Current | 900 nA/channel - reduces total system standby power to sub-µA level when unused channels are disabled. |
Pinout & Package
The TLV2785CDR is housed in a 16-pin TSSOP (PW) package with 0.65 mm pitch, 5.0 mm × 4.4 mm body size, and exposed pad for thermal enhancement. Pin assignment follows standard quad op-amp layout with dedicated shutdown controls for dual-channel pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 10, 16 | Output (OUT) | Amplified output terminals for channels 1–4; rail-to-rail swing supports full-scale ADC interface without level-shifting. |
| 2, 6, 9, 13 | Inverting Input (IN−) | Differential input node for each channel; high impedance (1000 GΩ) minimizes loading on high-Z sources like piezoresistive sensors. |
| 3, 5, 12, 14 | Non-inverting Input (IN+) | Reference input node; common-mode range extends 0.2 V beyond supply rails, enabling direct connection to DAC outputs or reference voltages. |
| 4, 15 | Ground (GND) | Power return path; dual GND pins reduce ground bounce in multi-channel switching applications. |
| 8 | Positive Supply (VDD) | Single positive supply input; accepts 1.8–3.6 V; internal regulation not required. |
| 11 | 1/2 Shutdown (1/2SHDN) | Logic-controlled enable/disable for channels 1 & 2; pulled high or left floating to activate; driven low to enter 900 nA shutdown mode. |
| 11 | 3/4 Shutdown (3/4SHDN) | Logic-controlled enable/disable for channels 3 & 4; independent control allows selective channel activation in multi-stage signal chains. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8 V supply range - no lost dynamic range when interfacing with 1.8 V logic or ADC references. |
| 8 MHz bandwidth at 650 µA | Delivers >10× higher speed-per-mA than legacy low-power op-amps, reducing latency in real-time control loops. |
| Independent dual shutdown controls | Allows partial system power-down - e.g., disable analog front-end while keeping reference buffer active - improving overall system energy efficiency. |
| −40°C to 125°C operation (I-suffix compatible) | Supports deployment in automotive engine compartments and industrial motor drives without derating or external heating/cooling. |
| Low 9 nV/√Hz input noise | Maintains >70 dB SNR for 10 kHz signals amplified 100×, meeting requirements for medical ECG and precision weigh-scale front-ends. |
| High CMRR (70 dB min) | Rejects common-mode interference from noisy digital supplies or shared ground paths in mixed-signal PCBs. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental monitors acquiring temperature, humidity, and gas concentration via analog sensor outputs. IC Role / Device Role / Timing Role: Quad op-amp configures as 4× single-ended sensor buffers, 1× differential amplifier for thermocouple inputs, and 1× reference buffer - all sharing one TLV2785CDR. Use Value: 650 µA/channel supply current extends 10-year battery life; rail-to-rail I/O captures full sensor range without external level-shifting circuitry. | Use Scenario: 4–20 mA loop-powered transmitters conditioning RTD, strain gauge, and pressure sensor signals in factory automation. IC Role / Device Role / Timing Role: Configured as precision instrumentation amplifier front-end (using 3 op-amps) and 4–20 mA current loop driver (4th channel). Use Value: 3000 µV max VIO ensures <0.1% measurement error over 0–100°C RTD range; shutdown mode cuts idle current during sleep cycles. |
| Medical Patient Monitoring | Automotive Body Control Modules |
Use Scenario: Wearable ECG patches amplifying microvolt-level cardiac signals while maintaining ultra-low power consumption. IC Role / Device Role / Timing Role: Channels 1–2 implement low-noise, high-CMRR instrumentation amplifier; channels 3–4 serve as anti-aliasing filters and ADC drivers. Use Value: 9 nV/√Hz input noise preserves QRS complex fidelity; 8 MHz GBW supports ≥1 kHz bandwidth for diagnostic-grade waveform capture. | Use Scenario: In-vehicle cabin sensors (occupancy, CO₂, ambient light) feeding microcontroller ADCs in 12 V systems with local 3.3 V LDO. IC Role / Device Role / Timing Role: Buffers analog outputs of Hall-effect, photo-diode, and thermistor sensors prior to MCU sampling. Use Value: Rail-to-rail output swing ensures full 0–3.3 V ADC input range utilization; 1.8 V minimum supply allows direct LDO dropout margin reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2785IDR | Identical electrical specs but rated for −40°C to 125°C industrial temperature range; same TSSOP-16 package. | Required for under-hood automotive or outdoor industrial deployments where ambient exceeds 70°C. | Select TLV2785IDR when operating temperature exceeds 70°C; otherwise TLV2785CDR suffices for commercial environments. |
| OPA4340UA | Higher 5.5 V max supply, 5.5 MHz GBW, 1.25 mA/channel supply current, and 1.5 nV/√Hz noise - but no shutdown function and SO-14 package. | Better for wide-supply, low-noise applications where power budget permits and shutdown is unnecessary. | Choose OPA4340UA only if lower noise and wider supply range outweigh loss of shutdown and TSSOP footprint advantages. |
Compared with TLV2785IDR, the TLV2785CDR trades extended temperature rating for lower cost in commercial-grade applications; compared with OPA4340UA, it offers integrated shutdown and smaller TSSOP-16 packaging at the expense of slightly higher noise and lower supply voltage ceiling.
Availability
TLV2785CDR is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical monitoring equipment requiring stable component supply across long production lifecycles.
Supply support for TLV2785CDR 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 specializing in analog and embedded processing technologies, with decades of expertise in precision op-amp design and low-power signal chain solutions.
The TLV278x family was engineered for ultra-low-voltage, rail-to-rail precision amplification in space-constrained, battery-sensitive applications - targeting portable medical devices, IoT edge sensors, and energy-harvesting systems.
FAQ
What is the maximum supply voltage for TLV2785CDR?
The absolute maximum supply voltage for TLV2785CDR is 4 V, but the recommended operating range is strictly 1.8 V to 3.6 V. Exceeding 3.6 V risks parametric shift or reliability degradation; operation at 3.6 V delivers optimal slew rate and output drive capability while remaining within safe margins defined in the SLOS245E datasheet.
Does TLV2785CDR support true rail-to-rail input and output?
Yes, TLV2785CDR supports rail-to-rail input with common-mode range from −0.2 V to VDD+0.2 V, and rail-to-rail output with swing within 180 mV of both rails at 1.8 V supply and 1 mA load. This enables direct interfacing with 1.8 V ADCs and DACs without external level-shifting components, preserving signal integrity and simplifying PCB layout.
How does the shutdown function work on TLV2785CDR?
TLV2785CDR features two independent shutdown pins: pin 11 (1/2SHDN) disables channels 1 and 2, while pin 11 (3/4SHDN) - shared on same pin per datasheet Figure 3 - disables channels 3 and 4. Driving either pin low reduces supply current to 900 nA per channel and places outputs in high-impedance state. Leaving the pin floating or pulling it high activates the respective pair.
What is the typical input bias current of TLV2785CDR?
The typical input bias current of TLV2785CDR is 2.5 pA at 25°C, with a maximum of 100 pA over the full 0°C to 70°C commercial temperature range. This ultra-low bias current minimizes voltage errors when used with high-impedance sources such as pH electrodes, photodiodes, or capacitive sensors - critical for precision measurement accuracy.
Can TLV2785CDR drive a 1000 pF capacitive load?
No, TLV2785CDR is not unity-gain stable into 1000 pF loads. The datasheet specifies stability for ≤25 pF capacitive loads; driving larger capacitances requires an isolation resistor (RNULL) in series with the output - typically 10–100 Ω - to restore phase margin and prevent oscillation, as detailed in Figure 30 of SLOS245E.
TLV2785CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2.5 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 650µA (x4 Channels)
- Current - Output / Channel:
- 23 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
TLV2785CDR FAQ
1.How can I place an order for TLV2785CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2785CDR 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 TLV2785CDR reliable?
The price and inventory of TLV2785CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2785CDR is usually 5 days.
3.What payment methods are accepted for TLV2785CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2785CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2785CDR?
TLV2785CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2785CDR 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 TLV2785CDR?
For technical support, including TLV2785CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2785CDR requirements.
6.How does Aetrix verify that TLV2785CDR is sourced from the original manufacturer or authorized distributors?
All TLV2785CDR 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 TLV2785CDR meets industry standards.
7.What is the process for return or replacement of TLV2785CDR?
All TLV2785CDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2785CDR, 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 TLV2785CDR part is unused and in its original packaging.
Return procedure for TLV2785CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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