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Texas Instruments TLC0834CD
- Part No.:
- TLC0834CD
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC0834CD.pdf
- Description:
- IC ADC 8BIT SAR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,559
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Product details
Overview
TLC0834CD from Texas Instruments is a 4-channel, 8-bit successive-approximation analog-to-digital converter (ADC) with serial control interface, ratiometric operation capability, and single 5-V supply support. It delivers ±1 LSB total unadjusted error, 32 µs conversion time at 250 kHz clock, and supports single-ended or differential input configurations for industrial sensor interfacing and embedded data acquisition systems.
For engineers reviewing the TLC0834CD datasheet, TLC0834CD pinout, TLC0834CD application, or TLC0834CD equivalent, key selection considerations include its SOIC-14 package, 0°C to 70°C operating range, software-configurable multiplexer addressing, TTL/MOS-compatible I/O, and compatibility with microprocessor serial interfaces requiring minimal external components.
Technical Context
The TLC0834CD implements a sample-data-comparator architecture with an internal 8-bit SAR (successive approximation register) and resistive ladder network. Its serial interface uses a 5-bit shift register for channel and mode selection, followed by MSB-first data output, with optional LSB-first mode enabled via external control on compatible variants (not applicable to TLC0834CD).
Channel selection and input polarity (single-ended/differential) are determined by a 3- to 4-bit assignment word shifted in via DI during CS low. The device features dual ground pins (ANLG GND and DGTL GND), separate REF input for flexible voltage reference scaling, and high-impedance DO/SARS outputs controlled by CS timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - provides 256 discrete digital codes over full-scale input range |
| Conversion Time | 32 µs at fCLK = 250 kHz - enables up to ~31.25 kSPS sustained sampling rate |
| Total Unadjusted Error | ±1 LSB - guarantees monotonicity and worst-case linearity without calibration |
| Input Channels | 4-channel multiplexer - supports CH0–CH3 with software-selectable single-ended or differential pairing |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across standard 5-V rail tolerances |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded and industrial control environments |
| Reference Input | External REF pin - allows encoding of sub-5-V analog spans to full 8-bit resolution |
Pinout & Package
Package: SOIC-14 (D package), 14-pin small-outline integrated circuit with gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No internal connection | Unused pad; must be left floating or tied to ground per layout best practices |
| 2 CS | Chip Select | Active-low enable for serial interface and conversion logic; must remain low throughout conversion cycle |
| 3 CH0 | Analog Input Channel 0 | Positive input terminal for single-ended or differential mode (paired with CH1) |
| 4 CH1 | Analog Input Channel 1 | Positive/negative input terminal for differential mode with CH0; configurable polarity |
| 5 CH2 | Analog Input Channel 2 | Positive input terminal for single-ended or differential mode (paired with CH3) |
| 6 CH3 | Analog Input Channel 3 | Positive/negative input terminal for differential mode with CH2; configurable polarity |
| 7 DGTL GND | Digital Ground | Return path for digital I/O circuits; should be separated from analog ground to minimize noise coupling |
| 8 VCC | Power Supply | +5 V supply for digital and analog sections; requires local 0.1 µF decoupling capacitor |
| 9 DI | Data Input | Serial address/data input for channel selection and mode configuration during CS low |
| 10 CLK | Serial Clock | Asynchronous master clock input; supports 10–600 kHz; duty cycle 40–60% |
| 11 SARS | SAR Status | Open-drain status output indicating active conversion (high) or idle (high-impedance) |
| 12 DO | Data Output | Serial MSB-first digital output; tri-stated when CS high or during address setup |
| 13 REF | Reference Voltage Input | External reference source for ADC full-scale; accepts 0–VCC; sets LSB weight |
| 14 ANLG GND | Analog Ground | Return path for analog inputs and reference; must be star-connected to DGTL GND at single point |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable multiplexer | Enables dynamic reassignment of CH0–CH3 as single-ended or differential pairs without hardware change |
| Ratiometric operation | Allows direct use of supply rail as reference, eliminating need for precision external reference in cost-sensitive designs |
| TTL/MOS-compatible I/O | Permits direct interfacing with legacy microcontrollers and FPGAs without level-shifting circuitry |
| Dual ground separation | Reduces digital switching noise coupling into analog measurement path, improving effective resolution |
| Low-power consumption | Typical ICC = 1.25 mA at 5 V enables battery-operated or thermally constrained applications |
Applications
| Industrial Sensor Interface | Embedded Data Logger |
|---|---|
|
Use Scenario: Monitoring temperature, pressure, and flow sensors in PLC I/O modules using 4–20 mA or 0–5 V analog outputs. IC Role / Device Role / Timing Role: 4-channel ADC digitizing multiple sensor signals with shared clock and serial bus to reduce MCU pin count. Use Value: Eliminates need for external multiplexer and reference IC; ±1 LSB error ensures repeatability across sensor calibration points. |
Use Scenario: Portable environmental monitoring unit logging temperature, humidity, and light intensity over extended periods. IC Role / Device Role / Timing Role: Low-power ADC acquiring samples at 10–100 Hz with microcontroller-controlled channel sequencing. Use Value: 1.25 mA typical supply current extends battery life; SOIC-14 footprint simplifies compact PCB layout. |
| Motor Control Feedback | Test & Measurement Front-End |
|
Use Scenario: Sampling current-sense amplifier outputs and potentiometer position feedback in closed-loop DC motor drives. IC Role / Device Role / Timing Role: Simultaneous sampling of two differential channels (e.g., CH0/CH1 for current, CH2/CH3 for position) with common-mode rejection. Use Value: Differential input mode rejects common-mode noise from PWM switching; 32 µs conversion supports real-time control loop updates. |
Use Scenario: Entry-level bench multimeter or signal analyzer capturing analog waveforms for display or PC transfer. IC Role / Device Role / Timing Role: Stand-alone ADC operated via serial link to FPGA or ARM-based host, providing calibrated 8-bit digitization. Use Value: External REF pin allows precise full-scale adjustment; TTL-compatible I/O simplifies interface design with minimal glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 8-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC0834CCN | Functionally equivalent but includes internal Zener regulator network; requires no external reference for 5-V operation | Eliminates need for external REF source; higher quiescent current (~2.5 mA) and limited to 5-V-only operation | Select when system lacks stable external reference and operates exclusively at 5 V |
| TLC0834ID | Identical functionality and pinout; rated for –40°C to 85°C industrial temperature range | Supports wider ambient operating conditions; same SOIC-14 package and electrical specs | Select when deployment environment exceeds 70°C or requires extended thermal margin |
Compared with TLC0834CD, ADC0834CCN offers integrated reference convenience at the cost of flexibility and power efficiency, while TLC0834ID provides identical performance with extended temperature qualification-making it suitable for harsher environments without layout or firmware changes.
Availability
TLC0834CD is available at Aetrix Electronics and suitable for industrial sensor interface, embedded data logging, motor control feedback, and test & measurement front-end applications requiring stable component supply and long-term production continuity.
Supply support for TLC0834CD 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 connectivity technologies with over 90 years of innovation in precision data conversion.
The TLC0834CD belongs to TI's legacy precision ADC product line designed for cost-sensitive, microprocessor-integrated data acquisition systems where serial interface simplicity and 8-bit resolution meet commercial-grade reliability requirements.
FAQ
What is the maximum clock frequency supported by the TLC0834CD?
The TLC0834CD supports a clock frequency range of 10 kHz to 600 kHz per the recommended operating conditions. At the maximum 600 kHz, conversion time remains eight clock periods (13.3 µs), but system-level timing margins for setup/hold and settling must be verified. For guaranteed 32 µs conversion, TI specifies 250 kHz as the reference test condition.
Does the TLC0834CD support differential input mode?
Yes, the TLC0834CD supports differential input mode for adjacent channel pairs: CH0/CH1 and CH2/CH3. Polarity is software-configurable via the serial address word. Each pair operates independently, and differential mode provides common-mode rejection-critical for noisy industrial signal conditioning.
Can the TLC0834CD operate without an external reference voltage?
Yes-the TLC0834CD can operate ratiometrically using VCC as the reference by connecting REF to VCC. This eliminates the need for an external precision reference in cost-sensitive applications, though full-scale accuracy depends on VCC stability and tolerance.
What is the meaning of the "C" suffix in TLC0834CD?
The "C" suffix in TLC0834CD denotes the commercial temperature grade, specifying operation from 0°C to 70°C. This distinguishes it from the "I" (industrial, –40°C to 85°C) and "Q" (automotive, –40°C to 125°C) variants-all sharing identical functionality and pinout within their respective packages.
Is the TLC0834CD pin-compatible with the TLC0838 series?
No-the TLC0834CD (14-pin SOIC) is not pin-compatible with the TLC0838 series (20-pin SOIC/DW or TSSOP/PW). While functionally similar, the TLC0838 adds four additional analog inputs (CH4–CH7) and a COM pin, requiring different PCB layout and firmware addressing logic.
TLC0834CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 20k
- Number of Inputs:
- 2, 3, 4
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 14-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC0834CD FAQ
1.How can I place an order for TLC0834CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC0834CD 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 TLC0834CD reliable?
The price and inventory of TLC0834CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC0834CD is usually 5 days.
3.What payment methods are accepted for TLC0834CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC0834CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC0834CD?
TLC0834CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC0834CD 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 TLC0834CD?
For technical support, including TLC0834CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC0834CD requirements.
6.How does Aetrix verify that TLC0834CD is sourced from the original manufacturer or authorized distributors?
All TLC0834CD 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 TLC0834CD meets industry standards.
7.What is the process for return or replacement of TLC0834CD?
All TLC0834CD units undergo pre-shipment inspection (PSI). If there is an issue with TLC0834CD, 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 TLC0834CD part is unused and in its original packaging.
Return procedure for TLC0834CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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