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Texas Instruments TLV2785IDR
- Part No.:
- TLV2785IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2785IDR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,137
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Product details
Overview
TLV2785IDR from Texas Instruments is a quad rail-to-rail input/output operational amplifier optimized for low-voltage, low-power precision signal conditioning in battery-powered and space-constrained systems. It operates from 1.8 V to 3.6 V, delivers 8 MHz gain-bandwidth, 4.8 V/µs slew rate (at VDD = 2.7 V), 650 µA per channel supply current, and supports −40°C to 125°C industrial temperature range - enabling use in portable medical sensors and high-resolution ADC front-ends.
For engineers reviewing the TLV2785IDR datasheet, TLV2785IDR pinout, TLV2785IDR application, or TLV2785IDR equivalent, this page provides verified electrical specifications, TSSOP-16 package terminal mapping, shutdown-enabled quad-channel architecture details, and validated alternatives for low-voltage analog signal chain design.
Technical Context
The TLV2785IDR implements a CMOS input stage with rail-to-rail input common-mode range (−0.2 V to VDD + 0.2 V) and rail-to-rail output swing, enabling full dynamic range utilization in single-supply 1.8 V systems. Its 8 MHz unity-gain bandwidth and 4.8 V/µs positive slew rate support stable operation driving 2 kΩ loads with ≤10 pF capacitance.
Each of the four amplifiers integrates an independent shutdown control (pins 1/2SHDN and 3/4SHDN), reducing per-channel supply current to 900 nA in disabled state while placing outputs in high-impedance mode - critical for power-gated sensor multiplexing and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct operation from two rechargeable cells (±0.9 V to ±1.8 V split supply equivalent) |
| Gain-Bandwidth Product | 8 MHz - supports stable closed-loop gain ≥10 at 800 kHz for anti-aliasing filter interfaces |
| Slew Rate (Positive) | 4.8 V/µs at VDD = 2.7 V - ensures <2.4 µs settling to 0.01% for 1 VPP step inputs |
| Input Offset Voltage | 3000 µV max (I-suffix, full temp range) - defines DC error budget in precision transducer amplification |
| Supply Current / Channel | 650 µA typical at 25°C - allows four-channel operation within 2.6 mA total for ultra-low-power data loggers |
| Input Noise Voltage | 9 nV/√Hz at 10 kHz - preserves SNR in audio and sensor signal chains up to 20 kHz bandwidth |
| Operating Temperature | −40°C to 125°C - qualified for under-hood automotive and industrial motor control feedback paths |
Pinout & Package
TSSOP-16 package: 5 mm × 4.4 mm body, 0.65 mm pitch, exposed pad optional for thermal enhancement (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT, 2OUT, 3OUT, 4OUT | Amplifier Output | Rail-to-rail voltage source capable of sourcing/sinking ±10 mA; high-impedance when corresponding SHDN asserted |
| 1IN−, 2IN−, 3IN−, 4IN− | Inverting Input | Differential node with 2.5 pA bias current; requires short trace routing to minimize stray capacitance |
| 1IN+, 2IN+, 3IN+, 4IN+ | Non-inverting Input | Common-mode range extends 0.2 V beyond rails; supports direct connection to 0 V or VDD-referenced sources |
| VDD | Positive Supply | Single supply input (1.8–3.6 V); must be decoupled with 0.1 µF ceramic capacitor placed ≤0.1 inch from pin |
| GND | Ground Reference | Low-inductance return path; recommended to use solid ground plane with local removal under input traces |
| 1/2SHDN, 3/4SHDN | Channel Shutdown Control | Active-low logic input; <0.6 V disables channels 1&2 or 3&4; >2 V enables; floating = enabled |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale signal swing in 1.8 V systems without level-shifting circuitry or dual supplies |
| 8 MHz GBW @ 650 µA | Delivers high-speed performance at <1/3 the quiescent current of comparable 10 MHz op-amps |
| Independent dual shutdown pairs | Allows selective channel disabling (e.g., disable unused ADC driver channels) to reduce system-level idle current |
| −40°C to 125°C operation | Qualified for continuous operation in automotive engine control units and industrial PLC analog I/O modules |
| Low 9 nV/√Hz noise @ 10 kHz | Maintains >90 dB SNR in 16-bit SAR ADC driver applications with 100 kHz effective bandwidth |
Applications
| Portable ECG Front-End | Industrial 4–20 mA Transmitter |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in battery-operated wearable monitors. IC Role / Device Role / Timing Role: Quad-channel instrumentation amplifier first stage with rail-to-rail output driving 16-bit sigma-delta ADC. Use Value: 1.8 V operation extends battery life; 8 MHz bandwidth supports >1 kHz ECG bandwidth; shutdown reduces idle current to nanoamp level during sleep cycles. |
Use Scenario: Conditioning RTD/thermocouple sensor outputs and driving 4–20 mA loop with HART modulation capability. IC Role / Device Role / Timing Role: Precision voltage-to-current converter input buffer and reference amplifier in loop-powered transmitter. Use Value: Rail-to-rail input accepts 0–2.5 V sensor outputs directly; 3000 µV max VIO ensures <0.01% FSR error over −40°C to 125°C ambient. |
| Automotive Cabin Air Quality Sensor | Smart Energy Meter Analog Front-End |
Use Scenario: Signal conditioning for NDIR CO₂ and VOC sensors in HVAC control modules exposed to under-dash temperatures. IC Role / Device Role / Timing Role: Low-noise preamplifier and active filter stage preceding metrology ADC. Use Value: −40°C to 125°C rating eliminates derating; 9 nV/√Hz noise preserves ppm-level gas concentration resolution; TSSOP-16 fits compact PCB layouts. |
Use Scenario: Isolated voltage/current sensing and anti-aliasing filtering in Class 0.2 electricity meters with optical communication interface. IC Role / Device Role / Timing Role: Four-channel signal conditioner for phase voltage, neutral current, and auxiliary sensor inputs. Use Value: Independent shutdown pairs allow dynamic channel enable/disable based on tariff period; 650 µA/channel enables 4-channel operation within 3 mA system budget. |
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 |
|---|---|---|---|
| TLV2785IPW | Same silicon die, identical electrical specs, PW (TSSOP-16) package with same pinout and footprint | No difference - direct package variant; TLV2785IDR uses tape-and-reel packaging (R suffix), TLV2785IPW is tray-packed | Select TLV2785IDR for automated SMT assembly; TLV2785IPW for prototyping or low-volume hand-soldering |
| OPA4376AIPWR | Lower 5.5 µV/°C VIO drift, 2.8 MHz GBW, 1.3 mA/ch supply current, no shutdown function | Lacks channel shutdown; higher power prevents use in battery-critical designs; superior DC precision suits lab-grade instrumentation | Choose OPA4376AIPWR only when VIO drift <10 µV/°C is mandatory and shutdown is unnecessary |
Compared with TLV2785IDR, TLV2785IPW offers identical performance in a different packaging format ideal for manual handling, while OPA4376AIPWR trades shutdown capability and ultra-low quiescent current for lower offset drift and higher DC accuracy - making it suitable only where power efficiency is secondary to long-term calibration stability.
Availability
TLV2785IDR is available at Aetrix Electronics and suitable for portable medical devices, industrial 4–20 mA transmitters, automotive cabin air quality sensors, and smart energy meter analog front-ends requiring stable component supply across extended temperature ranges.
Supply support for TLV2785IDR 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-amps and low-power signal chain solutions.
The TLV278x family was designed specifically for single-supply, low-voltage precision analog applications - delivering rail-to-rail I/O, sub-mA quiescent current, and industrial temperature range in compact packages for portable and harsh-environment electronics.
FAQ
What is the maximum capacitive load the TLV2785IDR can drive without instability?
The TLV2785IDR maintains stable operation with ≤10 pF capacitive load at the output when configured as a unity-gain follower. For loads exceeding 10 pF, a series null resistor (RNULL) of 10–50 Ω must be added between the output pin and the capacitive node to preserve ≥58° phase margin - as confirmed in Figure 18 of the SLOS245E datasheet. This requirement applies across the full 1.8–3.6 V supply range and −40°C to 125°C temperature range.
Does the TLV2785IDR support true rail-to-rail input common-mode voltage range?
Yes, the TLV2785IDR supports a common-mode input voltage range from −0.2 V to VDD + 0.2 V, verified across its full operating supply (1.8 V to 3.6 V) and temperature range (−40°C to 125°C). This allows direct interfacing with 0 V-referenced sensors and VDD-referenced voltage dividers without external level-shifting circuitry - a key feature confirmed in the "Recommended Operating Conditions" table of the SLOS245E datasheet.
How does the shutdown function operate on the TLV2785IDR?
The TLV2785IDR features two independent shutdown controls: pin 6 (1/2SHDN) disables amplifiers 1 and 2, and pin 13 (3/4SHDN) disables amplifiers 3 and 4. When pulled below 0.6 V, each pair enters shutdown mode with supply current reduced to 900 nA per channel and outputs placed in high-impedance state. Pulling above 2 V or leaving floating enables the respective pair - as specified in the "Shutdown Characteristics" section of the SLOS245E datasheet.
What is the typical input bias current of the TLV2785IDR and how does it affect high-impedance sensor interfaces?
The TLV2785IDR exhibits a typical input bias current of 2.5 pA at 25°C, with a maximum of 300 pA over the full −40°C to 125°C range. This ultra-low bias current minimizes voltage drop across high-impedance sources (e.g., pH electrodes or piezoelectric sensors), preserving signal integrity - especially critical in transducer interfaces where source impedances exceed 1 MΩ. The value is confirmed in the "Electrical Characteristics" table under IIB test conditions.
Can the TLV2785IDR be used with a 3.3 V supply in industrial applications?
Yes, the TLV2785IDR is fully specified and qualified for 3.3 V operation within its 1.8 V to 3.6 V supply range and −40°C to 125°C industrial temperature grade. At 3.3 V, it delivers 4.5 V/µs positive slew rate, 8 MHz gain-bandwidth, and maintains rail-to-rail output swing to within 180 mV of each rail at 5 mA load - all parameters verified in the "Electrical Characteristics" tables of the SLOS245E datasheet for VDD = 3.6 V (upper limit) and interpolated for 3.3 V.
TLV2785IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
TLV2785IDR FAQ
1.How can I place an order for TLV2785IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2785IDR 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 TLV2785IDR reliable?
The price and inventory of TLV2785IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2785IDR is usually 5 days.
3.What payment methods are accepted for TLV2785IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2785IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2785IDR?
TLV2785IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2785IDR 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 TLV2785IDR?
For technical support, including TLV2785IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2785IDR requirements.
6.How does Aetrix verify that TLV2785IDR is sourced from the original manufacturer or authorized distributors?
All TLV2785IDR 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 TLV2785IDR meets industry standards.
7.What is the process for return or replacement of TLV2785IDR?
All TLV2785IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2785IDR, 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 TLV2785IDR part is unused and in its original packaging.
Return procedure for TLV2785IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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