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Texas Instruments TLC1078CD
- Part No.:
- TLC1078CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC1078CD.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
TLC1078CD from Texas Instruments is a dual-channel LinCMOS™ µPOWER precision operational amplifier in an 8-pin SOIC (D) package, featuring 450 µV max input offset voltage, 0.6 pA typical input bias current, 47 V/ms typical slew rate, and ultra-low 150 µW per-amplifier power dissipation at 5 V - enabling high-accuracy signal conditioning in single-cell 1.4 V battery-powered instrumentation.
For engineers reviewing the TLC1078CD datasheet, TLC1078CD pinout, TLC1078CD application, or TLC1078CD equivalent, key selection criteria include rail-to-rail output swing, negative-rail-input capability, sub-1 µV/°C offset drift, ESD-protected LinCMOS inputs, and functional compatibility with TLC27L2/4 for low-voltage sensor front-ends and portable medical devices.
Technical Context
The TLC1078CD implements a dual-channel CMOS op-amp architecture with high-impedance LinCMOS inputs and complementary output stage capable of sourcing/sinking >20 mA. It operates down to 1.4 V supply while maintaining common-mode input range extending below the negative rail and output swing to the negative rail.
Its precision performance is enabled by on-chip trimming for low initial offset (≤450 µV), temperature-compensated biasing yielding 0.1 µV/month long-term drift, and internal ESD protection rated to 2000 V per MIL-PRF-38535 Method 3015.2 - all within a thermally stable SOIC-8 package qualified for 0°C to 70°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 16 V - supports direct operation from single silver-oxide watch battery (1.55 V) or alkaline cell (1.5 V) without regulation. |
| Input Offset Voltage (Max) | 450 µV - enables <1 mV error in 12-bit ADC front-end with ±2.5 V reference without trimming. |
| Input Bias Current (Typ) | 0.6 pA - preserves signal integrity in high-impedance pH sensors, piezoelectric transducers, and photodiode TIA designs. |
| Slew Rate (Typ) | 47 V/ms - sustains 110 kHz unity-gain bandwidth for anti-aliasing filtering and low-distortion audio preamplification. |
| Power Dissipation (Per Amp) | 150 µW at 5 V - allows continuous operation for >10 years on CR2032 coin cell in always-on IoT sensor nodes. |
| Common-Mode Input Range | Extends 0.2 V below negative rail - permits direct interfacing to grounded-sensor configurations without level-shifting circuitry. |
| Output Voltage Swing | Includes negative rail - delivers full dynamic range in single-supply systems with ground-referenced loads. |
Pinout & Package
Package: SOIC-8 (D package), 3.9 mm × 4.9 mm body, 1.27 mm pitch, tape-and-reel compatible (TLC1078CDR variant available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Capable of ±20 mA drive; rail-to-rail swing enables direct interface to ADC inputs or LED drivers. |
| 2 (IN–1) | Inverting input, Amp 1 | High-impedance LinCMOS node; supports >1 GΩ feedback networks for ultra-low leakage integrators. |
| 3 (IN+1) | Non-inverting input, Amp 1 | Matched to IN–1 for optimal CMRR; accepts signals down to –0.2 V with 5 V supply. |
| 4 (GND) | Analog ground reference | Shared return for both amplifiers; requires star grounding to maintain 95 dB CMRR performance. |
| 5 (VDD) | Positive supply rail | Accepts 1.4–16 V; internal regulation not required - simplifies power architecture in energy-constrained systems. |
| 6 (IN+2) | Non-inverting input, Amp 2 | Electrically isolated from Amp 1 inputs; enables dual-sensor differential measurement without crosstalk. |
| 7 (IN–2) | Inverting input, Amp 2 | Matched offset and bias specs to Amp 1 - critical for matched gain stages in instrumentation amplifiers. |
| 8 (OUT2) | Amplifier 2 output | Independent output stage; supports simultaneous dual-channel signal processing in compact space-constrained layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives loads to GND and within 100 mV of VDD - eliminates need for level-shifting in single-supply data acquisition. |
| Negative-rail input capability | Accepts input signals 0.2 V below GND - enables direct connection to grounded thermocouples or shunt-based current sensing. |
| 0.1 µV/month offset drift | Ensures calibration stability over 5+ years in unattended environmental monitoring equipment without recalibration. |
| 2000 V HBM ESD rating | Withstands handling and board-level ESD events without parameter degradation - reduces field failure risk in consumer wearables. |
| Functional pin compatibility with TLC27L2 | Enables drop-in upgrade path for existing designs seeking lower offset, higher gain, and improved PSRR (≥75 dB). |
Applications
| Portable Medical Sensors | Low-Power Data Loggers |
|---|---|
Use Scenario: Amplifying microvolt-level EEG or ECG signals from dry electrodes in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Precision dual op-amp configured as low-noise instrumentation amplifier front-end with DC-coupled gain and baseline stabilization. Use Value: 0.6 pA input bias prevents electrode polarization; 450 µV offset ensures <0.5% gain error in 100× gain stage; 150 µW dissipation extends CR2032 battery life beyond 18 months. | Use Scenario: Conditioning analog outputs from temperature, humidity, and gas sensors in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing programmable gain, offset correction, and anti-aliasing filtering prior to SAR ADC sampling. Use Value: Rail-to-rail output drives ADC reference rails directly; negative-rail input accommodates grounded NTC thermistor bridges; 110 kHz bandwidth supports oversampling for noise reduction. |
| Single-Cell Industrial Transmitters | Energy-Harvesting Sensor Interfaces |
Use Scenario: Signal conditioning for 4–20 mA loop-powered pressure or flow transmitters operating from 12–24 V supply with local sensing. IC Role / Device Role / Timing Role: Dual op-amp implementing bridge excitation, differential amplification, and voltage-to-current conversion in ultra-low-quiescent-current design. Use Value: 1.4 V minimum supply allows integration of local sensor signal chain even during brownout conditions; 20 mA output drive supports active load switching without external buffers. | Use Scenario: Amplifying picoampere-level photocurrent from solar-energy-harvesting photodiodes or piezoelectric vibration harvesters. IC Role / Device Role / Timing Role: Ultra-low-power transimpedance amplifier (TIA) and post-amplifier stage optimized for intermittent wake-up operation. Use Value: 0.6 pA input bias minimizes dark-current error in TIAs; 150 µW quiescent power enables >99% duty-cycle sleep mode; LinCMOS input prevents gate leakage in MOSFET-based energy storage control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CD | Higher 1.5 mV max VIO, 30 pA IIB, 0.55 V/ms slew rate, 120 µW power - older LinCMOS generation with relaxed precision specs. | Limited to less demanding applications like basic sensor buffering where offset drift <1 µV/°C is acceptable. | Select TLC27L2CD only when cost sensitivity outweighs precision requirements and legacy PCB layout must be preserved. |
| OPA2333AIDR | Zero-drift architecture, 10 µV max VIO, 200 pA IIB, 16 V/ms slew rate, 42 µW per amp - superior DC accuracy but lower bandwidth (350 kHz) and no negative-rail input. | Better for DC-critical applications (e.g., precision weight scales) but unsuitable for grounded-sensor interfaces requiring sub-rail input. | Choose OPA2333AIDR when ultra-low drift dominates design requirements and input common-mode range can be constrained above GND. |
Compared with TLC27L2CD, TLC1078CD delivers 3× lower offset and 100× lower input bias for high-impedance sources; versus OPA2333AIDR, it trades zero-drift advantage for true negative-rail input and higher slew rate - making TLC1078CD optimal for battery-powered sensor front-ends needing both precision and rail versatility.
Availability
TLC1078CD is available at Aetrix Electronics and suitable for portable medical sensors, low-power data loggers, single-cell industrial transmitters, and energy-harvesting sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for TLC1078CD 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, embedded processing, and digital signal processing technologies with over 90 years of innovation in precision analog ICs.
The TLC107x product line was designed specifically for ultra-low-power, high-precision signal conditioning in battery-operated and energy-constrained systems - emphasizing rail-to-rail operation, sub-microamp quiescent current, and robustness in harsh handling environments.
FAQ
What is the minimum supply voltage required for reliable operation of the TLC1078CD?
The TLC1078CD is fully specified to operate at a minimum supply voltage of 1.4 V, enabling direct use with single silver-oxide (1.55 V) or zinc-air (1.4 V) batteries without voltage boosting. At this voltage, it maintains functional common-mode input range, rail-to-rail output swing, and 110 kHz unity-gain bandwidth - verified across the 0°C to 70°C commercial temperature range. The TLC1078CD datasheet confirms stable operation down to 1.4 V under all recommended conditions.
Does the TLC1078CD support input signals below the negative supply rail?
Yes, the TLC1078CD supports common-mode input voltages extending 0.2 V below the negative rail (GND) when VDD = 5 V, and up to 0.3 V below GND at VDD = 10 V. This negative-rail-input capability is explicitly characterized in the electrical specifications table and enables direct interfacing with grounded sensors such as thermocouples, RTDs, and shunt-based current monitors without external level-shifting circuitry - a key differentiator from standard rail-to-rail input op-amps.
What is the maximum output current capability of each amplifier in the TLC1078CD?
Each amplifier in the TLC1078CD can source or sink up to ±20 mA continuously, as confirmed in the device description and absolute maximum ratings. This output drive strength allows direct driving of moderate loads such as LED indicators, small relays, or ADC reference buffers without external transistors. The ±30 mA absolute maximum rating provides headroom for transient peaks, and thermal derating tables in the TLC1078CD datasheet confirm safe operation at full output current within the SOIC-8 package's 725 mW power limit at 25°C ambient.
How does the input offset voltage drift specification of the TLC1078CD compare to industry standards for precision op-amps?
The TLC1078CD features a typical input offset voltage drift of 0.1 µV/month, including the first 30 days - a specification significantly tighter than conventional precision op-amps (typically 0.5–2 µV/month) and comparable to select chopper-stabilized devices. This long-term stability is achieved through proprietary LinCMOS process trimming and packaging, ensuring minimal calibration drift in unattended deployments such as environmental sensors or medical telemetry units. The TLC1078CD datasheet documents this value under "Electrical Characteristics" with test methodology and statistical distribution.
Is the TLC1078CD pin-compatible with other members of the TLC107x family, such as the TLC1079CD?
No, the TLC1078CD is not pin-compatible with the TLC1079CD. The TLC1078CD is a dual-channel op-amp in an 8-pin SOIC package, while the TLC1079CD is a quad-channel device requiring a 14-pin SOIC (D-14) package. Pinouts differ fundamentally: TLC1078CD uses pins 1–3/6–8 for dual amplifier I/O and pins 4/5 for GND/VDD, whereas TLC1079CD allocates additional pins for four independent amplifier inputs and outputs. Migration between them requires PCB redesign - though both share identical electrical specs per channel and functional compatibility with TLC27L2/4 series.
TLC1078CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.032V/µs
- Gain Bandwidth Product:
- 110 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 180 µV
- Current - Supply:
- 29µA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 1.4 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC1078CD FAQ
1.How can I place an order for TLC1078CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC1078CD 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 TLC1078CD reliable?
The price and inventory of TLC1078CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC1078CD is usually 5 days.
3.What payment methods are accepted for TLC1078CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC1078CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC1078CD?
TLC1078CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC1078CD 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 TLC1078CD?
For technical support, including TLC1078CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC1078CD requirements.
6.How does Aetrix verify that TLC1078CD is sourced from the original manufacturer or authorized distributors?
All TLC1078CD 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 TLC1078CD meets industry standards.
7.What is the process for return or replacement of TLC1078CD?
All TLC1078CD units undergo pre-shipment inspection (PSI). If there is an issue with TLC1078CD, 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 TLC1078CD part is unused and in its original packaging.
Return procedure for TLC1078CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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