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Texas Instruments TLC0834IN
- Part No.:
- TLC0834IN
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC0834IN.pdf
- Description:
- IC ADC 8BIT SAR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,040
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Product details
Overview
TLC0834IN from Texas Instruments is a 4-channel, 8-bit successive-approximation analog-to-digital converter (ADC) with serial control interface, operating from a single 5-V supply and supporting ratiometric or external reference configurations. It features ±1 LSB total unadjusted error, 32 µs conversion time at 250 kHz clock, and software-configurable single-ended/differential input assignments for industrial sensor interfacing.
For engineers reviewing the TLC0834IN datasheet, TLC0834IN pinout, TLC0834IN application, or TLC0834IN equivalent, this page provides verified technical context, validated pin functions, confirmed operating temperature range (–40°C to +85°C), package-specific terminal mapping, and real-world design implications of its serial shift-register interface and multiplexer addressing logic.
Technical Context
The TLC0834IN implements a sample-data comparator architecture with an internal 8-bit SAR engine and configurable 4-channel analog multiplexer. Its serial interface uses a 5-bit shift register for channel selection and mode control (SGL/DIF, ODD/EVEN), requiring a start bit followed by address bits before conversion initiation.
Conversion begins on CS low assertion and proceeds over exactly eight clock cycles after multiplexer settling; output data is MSB-first, with SARS high during conversion and DO transitioning from high-impedance to active low for one clock period during settling. Input range is 0 V to VREF, with VREF adjustable up to 5 V and compatible with TTL/MOS logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes across full-scale input range |
| Conversion Time | 32 µs at fCLK = 250 kHz - fixed 8-clock-cycle latency enables deterministic timing in real-time systems |
| Total Unadjusted Error | ±1 LSB - includes offset, full-scale, linearity, and multiplexer errors without calibration |
| Input Channels | 4-channel single-ended or 2-channel differential - supports flexible sensor signal routing via software address control |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of typical power rail variation |
| Reference Input | External 0–5 V - enables ratiometric measurement or precise scaling independent of VCC |
Pinout & Package
Package: PDIP (N), 14-pin through-hole. Pin 1 marked by notch or dot; pin numbering counterclockwise from top-left corner when viewed from top with notch left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pad; must remain unconnected to avoid parasitic coupling |
| 2 (CS) | Chip Select | Active-low enable for serial interface and internal logic; must stay low throughout conversion cycle |
| 3–6 (CH0–CH3) | Analog input channels | Configurable as single-ended inputs or differential pairs (e.g., CH0+/CH1–); polarity assigned via serial address |
| 7 (DGTL GND) | Digital ground | Return path for digital I/O; requires separate low-impedance trace from analog ground to minimize noise coupling |
| 8 (VCC) | Positive supply | Provides power for digital logic and internal reference ladder; bypass capacitor required at pin |
| 9 (DI) | Serial data input | Accepts multiplexer address and start bit; sampled only during CS low and prior to conversion start |
| 10 (CLK) | Serial clock input | Synchronizes address loading and conversion timing; duty cycle 40–60% required for reliable operation |
| 11 (SARS) | Start/Busy indicator | High during conversion; used for polling or interrupt-driven synchronization with host processor |
| 12 (DO) | Serial data output | MSB-first 8-bit result; tri-states when CS high; shares line with DI in bidirectional configurations |
| 13 (REF) | Reference voltage input | Defines full-scale analog input range; accepts 0–5 V; impedance ~2 kΩ; decoupling recommended |
| 14 (ANLG GND) | Analog ground | Return path for analog inputs and internal ladder; must be star-connected to DGTL GND at single point |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input modes | Single-ended, differential, or pseudodifferential assignment per channel via serial address bits - eliminates external switching hardware |
| Serial interface with minimal I/O | Uses only CS, CLK, DI, and DO - reduces MCU pin count and PCB routing complexity versus parallel ADCs |
| Internal multiplexer settling management | Automated one-clock-period delay after channel selection - ensures stable sampling without host timing overhead |
| TTL/MOS logic compatibility | Input thresholds meet 0.8 V / 2.0 V specs and outputs drive 1.6 mA sink - interoperable with legacy 5-V microcontrollers |
| Ratiometric operation support | VREF tied to same source as sensor excitation - cancels supply drift effects in bridge or current-loop sensors |
Applications
| Industrial Sensor Interface | Embedded Data Acquisition |
|---|---|
Use Scenario: Reading thermistor, RTD, or pressure transducer outputs in PLC analog input modules. IC Role / Device Role / Timing Role: ADC front-end with integrated 4-channel mux; converts conditioned analog signals to digital for Modbus or CAN bus transmission. Use Value: Eliminates external multiplexer and level-shifting circuitry; ±1 LSB accuracy meets Class B industrial sensor requirements per IEC 61000-4-5. | Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and light intensity. IC Role / Device Role / Timing Role: Low-power 8-bit ADC with serial interface; samples multiple sensors sequentially using software-controlled channel selection. Use Value: 0.6–1.25 mA supply current enables >1-year battery life; 32 µs conversion allows rapid polling without MCU idle cycles. |
| Motor Control Feedback | Power Supply Monitoring |
Use Scenario: Measuring phase currents and DC bus voltage in BLDC motor drives. IC Role / Device Role / Timing Role: High-speed analog acquisition block; differential inputs reject common-mode noise from PWM switching. Use Value: Differential mode rejects >40 dB common-mode noise at 20 kHz; 32 µs conversion supports 15 kHz current loop update rates. | Use Scenario: Real-time monitoring of +12 V, +5 V, and +3.3 V rails in telecom power shelves. IC Role / Device Role / Timing Role: Multi-rail voltage digitizer; ratiometric operation compensates for reference drift in long-term deployments. Use Value: Adjustable VREF allows full 8-bit resolution across sub-5 V ranges (e.g., 0–3.3 V); ±1 LSB error ensures <0.4% voltage measurement uncertainty. |
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 |
|---|---|---|---|
| ADC0834CN | Functionally identical but lacks internal Zener regulator network; requires external 5-V reference | Same pinout and timing; no difference in sensor interface or microcontroller integration | Select ADC0834CN if existing design already provides stable 5-V reference and cost minimization is critical |
| TLC0834CD | SOIC-14 package; rated for 0°C to 70°C instead of –40°C to 85°C | Not suitable for extended-temperature industrial enclosures or outdoor equipment | Choose TLC0834CD only for commercial-grade applications where ambient temperature stays within 0–70°C |
Compared with ADC0834CN and TLC0834CD, the TLC0834IN offers identical electrical performance and interface behavior while providing extended temperature qualification and through-hole PDIP packaging for prototyping and high-reliability industrial assembly.
Availability
TLC0834IN is available at Aetrix Electronics and suitable for industrial sensor interface, embedded data acquisition, motor control feedback, and power supply monitoring requiring stable component supply across extended temperature ranges.
Supply support for TLC0834IN 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and communications product portfolios.
The TLC0834IN belongs to TI's legacy precision data acquisition family, designed specifically for cost-sensitive, medium-resolution industrial measurement systems requiring simple serial interfacing and robust operation without calibration.
FAQ
What is the maximum clock frequency supported by the TLC0834IN?
The TLC0834IN supports clock frequencies from 10 kHz to 600 kHz per the recommended operating conditions. At 600 kHz, conversion time remains eight clock periods (13.3 µs), but timing margins for setup/hold and settling narrow; TI specifies 250 kHz as the nominal frequency for guaranteed ±1 LSB performance across temperature.
Does the TLC0834IN require an external reference voltage?
Yes, the TLC0834IN requires an external reference voltage applied to the REF pin. It does not include an internal voltage reference or Zener regulator. The reference can be derived from the same 5-V supply (ratiometric mode) or a precision external source, with input impedance approximately 2 kΩ and full-scale range up to 5 V.
Can the TLC0834IN perform differential measurements?
Yes, the TLC0834IN supports true differential measurements between adjacent channels (e.g., CH0 and CH1) using software-configured polarity assignment. Each pair operates as a dedicated differential input with common-mode rejection; it does not support arbitrary channel pairing or pseudo-differential mode like the TLC0838.
What is the purpose of the SARS pin on the TLC0834IN?
The SARS (Start/Busy) pin on the TLC0834IN is an open-drain output that goes high when conversion starts and returns low when complete. It provides hardware synchronization for microcontrollers - enabling polling or interrupt-driven data capture without relying solely on fixed clock-count delays.
Is the TLC0834IN pin-compatible with the TLC0838IN?
No, the TLC0834IN is not pin-compatible with the TLC0838IN. The TLC0834IN uses a 14-pin PDIP package with four analog inputs (CH0–CH3), while the TLC0838IN uses a 20-pin PDIP package with eight analog inputs (CH0–CH7) plus a COM pin. Their pinouts, channel count, and address logic differ fundamentally.
TLC0834IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 14-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
TLC0834IN FAQ
1.How can I place an order for TLC0834IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC0834IN 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 TLC0834IN reliable?
The price and inventory of TLC0834IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC0834IN is usually 5 days.
3.What payment methods are accepted for TLC0834IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC0834IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC0834IN?
TLC0834IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC0834IN 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 TLC0834IN?
For technical support, including TLC0834IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC0834IN requirements.
6.How does Aetrix verify that TLC0834IN is sourced from the original manufacturer or authorized distributors?
All TLC0834IN 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 TLC0834IN meets industry standards.
7.What is the process for return or replacement of TLC0834IN?
All TLC0834IN units undergo pre-shipment inspection (PSI). If there is an issue with TLC0834IN, 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 TLC0834IN part is unused and in its original packaging.
Return procedure for TLC0834IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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