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Texas Instruments TLV1543CDW
- Part No.:
- TLV1543CDW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV1543CDW.pdf
- Description:
- IC ADC 10BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,997
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Product details
Overview
TLV1543CDW from Texas Instruments is a 10-bit, 11-channel serial-output analog-to-digital converter (ADC) with built-in sample-and-hold, on-chip system clock, and end-of-conversion (EOC) output. It operates from a 3.3-V supply, delivers ±1 LSB total unadjusted error, and supports three self-test modes. It is used in embedded data acquisition systems requiring precise ratiometric conversion via differential reference inputs (REF+, REF−).
For engineers reviewing the TLV1543CDW datasheet, TLV1543CDW pinout, TLV1543CDW application, or TLV1543CDW equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature (0°C to 70°C), and real-world interface timing behavior for host microcontroller integration.
Technical Context
The TLV1543CDW implements a switched-capacitor successive-approximation architecture with a 14-channel analog multiplexer (11 external inputs + 3 internal self-test voltages). Conversion is initiated by a 4-bit serial address shifted in on ADDRESS during the first four rising edges of I/O CLOCK, followed by automatic sampling over six clock cycles and hold on the tenth falling edge.
It features differential high-impedance reference inputs enabling ratiometric measurement, and its 3-state DATA OUT supports direct 4-wire SPI-compatible interfacing with CS, I/O CLOCK, ADDRESS, and DATA OUT signals. EOC asserts low after the tenth I/O CLOCK falling edge and returns high when conversion completes and data is ready.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes for analog input mapping |
| Analog Inputs | 11 channels (A0–A10) - selectable via 4-bit serial address with break-before-make switching |
| Total Unadjusted Error | ±1 LSB max - ensures monotonicity and ≤0.1% full-scale deviation without calibration |
| Supply Voltage | 3.0 V to 5.5 V - compatible with 3.3-V logic systems and tolerant of 5-V operation |
| Conversion Time | 21 µs - fixed latency from tenth I/O CLOCK falling edge to EOC assertion |
| Operating Temperature | 0°C to 70°C - commercial-grade qualification per TLV1543C specification |
| I/O CLOCK Frequency | Up to 1.1 MHz - defines maximum serial throughput and sampling rate |
Pinout & Package
TLV1543CDW uses a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013AC footprint. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Analog input terminals | 11 single-ended analog inputs; internally multiplexed; source impedance ≤1 kΩ required |
| CS | Chip select input | Active-low control that enables serial interface and resets internal counters on high-to-low transition |
| I/O CLOCK | Serial clock input/output | Controls address latching (first 4 rising edges), sampling window, and data shifting (falling edges) |
| ADDRESS | Serial address input | 4-bit MSB-first channel select for analog or self-test mode; ignored after fourth clock |
| DATA OUT | 3-state serial data output | Shifts out previous conversion result (MSB first); high-impedance when CS is high |
| EOC | End-of-conversion indicator | Active-low open-drain output; goes low on tenth I/O CLOCK falling edge, high when data ready |
| REF+, REF− | Differential reference inputs | Set full-scale (REF+) and zero-scale (REF−) voltage range; enable ratiometric accuracy |
| VCC, GND | Power supply terminals | 3.0–5.5 V digital/analog supply; all measurements referenced to GND |
Key Features
| Feature | Design Value |
|---|---|
| Inherent sample-and-hold | Automatic sampling starts on fourth I/O CLOCK falling edge and holds on tenth falling edge - eliminates external S/H circuitry |
| Three self-test modes | Internal test voltages (Vref−, Vref+/2, Vref+) accessible via address 1011b/1100b/1101b - enables in-system ADC verification without external stimuli |
| Ratiometric reference architecture | Differential REF+/REF− inputs decouple conversion accuracy from supply noise - critical for sensor front-ends powered from same rail |
| Pin compatibility with TLC1543 | Identical pinout and serial protocol - allows drop-in replacement in legacy designs using TLC1543 without PCB change |
| CMOS switched-capacitor design | Enables ±1 LSB error over full 0°C–70°C range without trimming - reduces calibration overhead in production |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitoring thermistor, potentiometer, and pressure sensor outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Primary 10-bit ADC performing sequential multi-channel sampling with ratiometric scaling against sensor excitation voltage. Use Value: ±1 LSB error and 21 µs conversion time support 40+ kSPS aggregate throughput across 11 channels with deterministic timing. |
Use Scenario: Reading cabin temperature, seat position, and ambient light sensors in vehicle interior electronics. IC Role / Device Role / Timing Role: Low-power serial ADC interfaced to 8-bit MCU via 4-wire SPI; leverages EOC for interrupt-driven data capture. Use Value: 3.3-V operation and 0.8 mA typical ICC meet automotive micro-power requirements while maintaining 10-bit resolution. |
| Medical Vital Sign Monitor | Energy Meter Front-End |
|
Use Scenario: Digitizing ECG lead voltages and respiration transducer outputs in portable patient monitors. IC Role / Device Role / Timing Role: High-impedance analog input stage with REF+/REF− isolation prevents logic noise coupling into sensitive biopotential signals. Use Value: Input capacitance ≤60 pF and 5 MΩ hold-mode impedance minimize signal settling errors during multiplexed acquisition. |
Use Scenario: Sampling shunt-based current and transformer-coupled voltage signals in Class 0.5 electricity meters. IC Role / Device Role / Timing Role: Ratiometric ADC referenced to precision voltage reference; uses self-test modes for periodic metrological validation. Use Value: Total unadjusted error ≤±1 LSB ensures compliance with IEC 62053-21 linearity requirements without software correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC1543CN | Same pinout and serial interface; wider 2.7–5.5 V supply range but higher ±1.5 LSB error and no 3.3-V optimized characterization | Acceptable for cost-sensitive industrial designs where ±1.5 LSB error is tolerable and 5-V supply is available | Select TLC1543CN only if board already uses 5-V rails and absolute error budget allows +0.5 LSB degradation |
| ADS7822U | 8-pin MSOP, 12-bit resolution, SPI-only interface (no EOC), 2.7–5.25 V supply, 1.2 µs conversion time | Better resolution/speed but lacks self-test modes, multiplexer, and EOC - requires host-controlled timing | Choose ADS7822U when higher resolution and faster sampling are prioritized over built-in diagnostics and multi-channel flexibility |
Compared with TLC1543CN, TLV1543CDW offers tighter ±1 LSB error and guaranteed 3.3-V performance; versus ADS7822U, it trades resolution and speed for integrated multiplexing, self-test, and EOC signaling - making it optimal for resource-constrained microcontroller systems needing robust, multi-sensor digitization.
Availability
TLV1543CDW is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control units, and portable medical devices requiring stable component supply and long-term manufacturability.
Supply support for TLV1543CDW 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 data converters and industrial-grade ICs.
The TLV1543CDW belongs to TI's TLV1543 family of low-power, serial 10-bit ADCs designed specifically for microcontroller-based data acquisition in cost-sensitive, space-constrained embedded systems.
FAQ
What is the maximum I/O CLOCK frequency supported by TLV1543CDW?
The TLV1543CDW supports up to 1.1 MHz I/O CLOCK frequency under recommended operating conditions (VCC = 3.0–5.5 V, TA = 0°C to 70°C). This limit ensures reliable address latching, sampling, and data shifting. Exceeding 1.1 MHz may cause timing violations in conversion initiation or data output validity windows, as specified in the SLAS072E datasheet timing diagrams.
Does TLV1543CDW require an external sample-and-hold circuit?
No, the TLV1543CDW includes inherent sample-and-hold functionality. Sampling begins automatically on the fourth falling edge of I/O CLOCK and holds on the tenth falling edge - eliminating need for external components. This is confirmed in the functional block diagram and "detailed description" section of the SLAS072E datasheet.
How does the self-test feature work in TLV1543CDW?
The TLV1543CDW provides three internal self-test voltages (Vref−, Vref+/2, Vref+) selected via ADDRESS bits 1011b, 1100b, and 1101b respectively. When activated, these references are routed through the 14-channel multiplexer and converted identically to external analog inputs, yielding expected hex codes 000, 200, and 3FF - enabling in-system verification without external test equipment.
Is TLV1543CDW pin-compatible with TLC1543?
Yes, TLV1543CDW is explicitly stated as pin-compatible with TLC1543 in the datasheet's "Features" list. Both share identical 20-pin SOIC (DW) packaging, matching pin functions (e.g., CS, I/O CLOCK, ADDRESS, DATA OUT, EOC), and compatible serial timing - allowing direct substitution in existing TLC1543 layouts without PCB modification.
What is the purpose of the EOC signal in TLV1543CDW?
The EOC (end-of-conversion) output in TLV1543CDW is an active-low indicator that transitions low on the tenth I/O CLOCK falling edge and returns high when conversion completes and the 10-bit result is ready in the output register. It enables interrupt-driven data reads in microcontroller systems, eliminating polling delays and improving CPU efficiency during multi-channel acquisition sequences.
TLV1543CDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 38k
- Number of Inputs:
- 11
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 3V ~ 5.5V
- Voltage - Supply, Digital:
- 3V ~ 5.5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV1543CDW FAQ
1.How can I place an order for TLV1543CDW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1543CDW 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 TLV1543CDW reliable?
The price and inventory of TLV1543CDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1543CDW is usually 5 days.
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TLV1543CDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1543CDW 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 TLV1543CDW?
For technical support, including TLV1543CDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1543CDW requirements.
6.How does Aetrix verify that TLV1543CDW is sourced from the original manufacturer or authorized distributors?
All TLV1543CDW 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 TLV1543CDW meets industry standards.
7.What is the process for return or replacement of TLV1543CDW?
All TLV1543CDW units undergo pre-shipment inspection (PSI). If there is an issue with TLV1543CDW, 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 TLV1543CDW part is unused and in its original packaging.
Return procedure for TLV1543CDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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