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Texas Instruments TLV1543CFNR
- Part No.:
- TLV1543CFNR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
TLV1543CFNR.pdf
- Description:
- SAR ADC, 10-BIT, SERIAL ACCESS
- Quantity:
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Product details
Overview
TLV1543CFNR from Texas Instruments is a 3.3-V CMOS 10-bit successive-approximation analog-to-digital converter with 11 analog input channels, inherent sample-and-hold, and ±1 LSB total unadjusted error. It features a 4-wire serial interface (CS, I/O CLOCK, ADDRESS, DATA OUT), on-chip system clock, and end-of-conversion (EOC) output - used in embedded data acquisition systems requiring low-power, multi-channel voltage monitoring.
For engineers reviewing the TLV1543CFNR datasheet, TLV1543CFNR pinout, TLV1543CFNR application, or TLV1543CFNR equivalent, this page delivers verified technical context, real-world timing behavior, true pin-level circuit roles, confirmed self-test functionality, and validated alternative options for industrial sensor interfacing and microcontroller-based ADC expansion.
Technical Context
The TLV1543CFNR implements a switched-capacitor SAR architecture with a 14-channel analog multiplexer (11 external inputs + 3 internal self-test voltages), automatic sample-and-hold triggered on the fourth I/O CLOCK falling edge and held after the tenth, and differential high-impedance reference inputs (REF+, REF−) enabling ratiometric conversion. Its serial interface supports six timing modes - including fast 10-clock and slow 16-clock transfers - with CS-controlled state transitions and EOC-synchronized data readout.
Conversion begins on the tenth I/O CLOCK falling edge; EOC asserts low within 70–240 ns thereafter and remains low until conversion completes (21 µs typical). The device uses a charge-redistribution capacitor ladder (512–1 weights) and threshold detector to resolve bits MSB-first, with all 10 bits shifted out via DATA OUT under CS control - supporting direct connection to MSP430, C2000, and other TI microcontrollers' SPI peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete digital codes over full-scale range, sufficient for 0.1% measurement precision in industrial sensing. |
| Input Channels | 11 analog inputs (A0–A10) + 3 internal self-test voltages - enables flexible channel selection without external MUX in compact systems. |
| Total Unadjusted Error | ±1 LSB max - guarantees monotonicity and eliminates need for system-level calibration in most embedded applications. |
| Supply Voltage | 3.0 V to 5.5 V (TLV1543C grade) - compatible with 3.3-V logic domains and tolerant of rail variations in battery-powered designs. |
| Conversion Time | 21 µs typical - allows up to ~47.6 kSPS sustained sampling when using fast 10-clock mode with continuous CS low. |
| Reference Interface | Differential REF+/REF− inputs - supports ratiometric operation, isolates analog front-end from supply noise, and enables scaling via external references. |
| Serial Interface | 4-wire SPI-compatible (CS, I/O CLOCK, ADDRESS, DATA OUT) - requires no additional level-shifting or protocol translation for MCU integration. |
Pinout & Package
TLV1543CFNR is packaged in a 20-pin plastic chip carrier (FN package), surface-mountable with gull-wing leads, footprint compatible with JEDEC MS-013AC. Pin numbering follows standard FN top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Analog input terminals | 11 single-ended analog signal inputs; driven by sources ≤1 kΩ impedance to ensure accurate sampling during 6-clock acquisition window. |
| CS | Chip select input | Active-low enable controlling interface activation, DATA OUT tri-state, and internal counter reset - must meet 1.425 µs setup before first clock. |
| I/O CLOCK | Serial clock input/output | Bi-directional clock governing address latching (first 4 rising edges), sampling start (4th falling edge), and data shifting (next 9 falling edges). |
| ADDRESS | 4-bit serial address input | MSB-first 4-bit code selecting A0–A10 or self-test voltage; latched on first four I/O CLOCK rising edges, ignored thereafter per conversion cycle. |
| DATA OUT | 3-state serial data output | Drives MSB on CS falling edge (Mode 1/3/5) or EOC rising edge (Mode 2/4); shifts remaining 9 bits on subsequent I/O CLOCK falling edges. |
| EOC | End-of-conversion flag | Open-drain output goes low on 10th I/O CLOCK falling edge and returns high after 21 µs - signals readiness of 10-bit result for host readback. |
| REF+, REF− | Differential reference inputs | Set full-scale (REF+) and zero-scale (REF−) bounds; support ratiometric use where reference tracks sensor excitation or power rail. |
| VCC, GND | Power supply terminals | 3.0–5.5 V digital/analog supply (VCC) and common return (GND); decoupling capacitor required near VCC pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Three built-in self-test modes | Verifies ADC functionality in-system using internal Vref+, Vref−, and Vref+−Vref−/2 test voltages - eliminates need for external test equipment during production or field diagnostics. |
| Inherent sample-and-hold | Automatic sampling initiated on 4th I/O CLOCK falling edge and held after 10th - removes requirement for external S/H circuitry and simplifies PCB layout. |
| Pin compatibility with TLC1543 | Direct drop-in replacement for legacy TLC1543 in existing FN-package designs - preserves board layout, firmware, and BOM continuity during upgrade. |
| Break-before-make analog multiplexer | Prevents transient coupling between channels during switching - critical for high-accuracy measurements in multi-sensor monitoring applications. |
| Low operating current | 0.8–2.5 mA typical ICC at 3–5.5 V - enables extended battery life in portable instrumentation and low-power IoT edge nodes. |
Applications
| Industrial Sensor Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Real-time acquisition of temperature, pressure, and current-sense signals across 11 factory-floor sensors connected to a PLC or RTU. IC Role / Device Role / Timing Role: Central 10-bit ADC providing synchronized, ratiometric digitization of analog sensor outputs with self-test validation before each scan cycle. Use Value: ±1 LSB error ensures repeatability across temperature range (0°C to 70°C), while 21 µs conversion time supports 20+ channel scans per millisecond in distributed I/O modules. |
Use Scenario: Sampling phase currents and DC bus voltage in a 3-phase inverter for field-oriented control (FOC) in HVAC compressors or servo drives. IC Role / Device Role / Timing Role: Multi-channel ADC interfaced to C2000 MCU via SPI, delivering timely feedback with deterministic 10-clock timing mode and EOC-driven interrupt handling. Use Value: Break-before-make multiplexer prevents cross-talk between current-sense and voltage-sense paths; REF+/REF− isolation rejects common-mode noise from power stage switching. |
| Portable Data Loggers | Medical Vital Sign Acquisition |
|
Use Scenario: Battery-powered environmental logger capturing humidity, ambient light, and battery voltage over extended periods using ultra-low-quiescent-current design. IC Role / Device Role / Timing Role: Low-power ADC activated on timer interrupt, performing single-channel conversions with CS toggled per sample to minimize average current draw. Use Value: 0.8 mA typical supply current at 3 V and 10-clock mode reduces active power to <2.5 mW - extends AA-cell life to >12 months at 1 Hz sampling. |
Use Scenario: Digitizing ECG lead voltages, respiration transducer outputs, and temperature probes in handheld patient monitors with strict EMC requirements. IC Role / Device Role / Timing Role: Isolated ADC subsystem using differential REF inputs and high-impedance analog path to reject 50/60 Hz mains interference and amplifier offset drift. Use Value: Input capacitance ≤60 pF and 5 MΩ hold-mode impedance preserve signal integrity from high-Z biopotential sources; self-test validates accuracy pre-measurement. |
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, identical 11-channel 10-bit SAR architecture, but rated for 0°C to 70°C only and lacks TLV-series low-voltage optimization below 3.3 V. | Valid for legacy designs using plastic DIP (N) package; not suitable for new 3.0-V-only systems due to higher minimum VCC (4.5 V typical). | Select TLC1543CN only when reusing existing N-package PCBs and operating above 4.5 V - TLV1543CFNR offers broader supply range and lower power. |
| ADS7822U | 8-pin SOIC, 12-bit resolution, SPI interface, 200 kSPS, but only 1 analog input and no internal MUX or self-test - requires external signal conditioning. | Better for high-precision single-channel applications (e.g., precision voltage monitoring), not for multi-sensor systems needing channel agility. | Choose ADS7822U when resolution >10 bits is mandatory and channel count is fixed; TLV1543CFNR remains optimal for cost-sensitive, multi-input, self-validating designs. |
Compared with TLC1543CN and ADS7822U, the TLV1543CFNR uniquely combines 11-channel flexibility, on-chip self-test, 3.0–5.5 V operation, and FN-package compatibility - making it the only option that preserves legacy layout while enabling lower-voltage, lower-power, and higher-integration embedded ADC subsystems.
Availability
TLV1543CFNR is available at Aetrix Electronics and suitable for industrial sensor monitoring, motor control feedback, portable data loggers, and medical vital sign acquisition requiring stable component supply across extended product lifecycles.
Supply support for TLV1543CFNR 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 decades of expertise in precision data converters and industrial-grade ICs.
The TLV1543CFNR belongs to TI's legacy low-voltage precision ADC family, designed specifically for cost-effective, multi-channel data acquisition in resource-constrained embedded systems operating from 3.3-V rails.
FAQ
What is the operating temperature range for the TLV1543CFNR?
The TLV1543CFNR is characterized for operation from 0°C to 70°C - matching the 'C' grade specification defined in the SLAS072E datasheet. This commercial temperature range suits indoor industrial controls, consumer test equipment, and non-extreme environmental monitoring applications where ambient conditions remain within this bound.
Does the TLV1543CFNR require an external clock source?
No, the TLV1543CFNR includes an on-chip system clock and does not require an external crystal or oscillator. All timing is derived from the externally supplied I/O CLOCK signal, which drives address latching, sampling, conversion sequencing, and serial data output - simplifying system design and reducing BOM count.
How many self-test modes does the TLV1543CFNR support, and how are they selected?
The TLV1543CFNR supports three internal self-test modes: Vref+ − Vref−, Vref−, and Vref+. These are selected by writing address codes B (1011), C (1100), and D (1101) to the ADDRESS pin during the 4-bit serial address phase - enabling in-system verification without external stimulus.
Is the TLV1543CFNR pin-compatible with the TLC1543 series?
Yes, the TLV1543CFNR is explicitly stated as pin compatible with the TLC1543 in the datasheet. Both share identical FN-package pinout, terminal functions, and serial interface protocol - allowing direct replacement in existing TLC1543CN or TLC1543IN designs without PCB or firmware changes.
What is the maximum recommended I/O CLOCK frequency for the TLV1543CFNR?
The maximum recommended I/O CLOCK frequency for the TLV1543CFNR is 1.1 MHz under standard operating conditions (VCC = 3–5.5 V, TA = 0°C to 70°C). Exceeding this may cause timing violations in address capture, sampling, or data output validity windows as specified in Figures 9–14 of SLAS072E.
TLV1543CFNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
TLV1543CFNR FAQ
1.How can I place an order for TLV1543CFNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1543CFNR 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 TLV1543CFNR reliable?
The price and inventory of TLV1543CFNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1543CFNR is usually 5 days.
3.What payment methods are accepted for TLV1543CFNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1543CFNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1543CFNR?
TLV1543CFNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1543CFNR 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 TLV1543CFNR?
For technical support, including TLV1543CFNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1543CFNR requirements.
6.How does Aetrix verify that TLV1543CFNR is sourced from the original manufacturer or authorized distributors?
All TLV1543CFNR 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 TLV1543CFNR meets industry standards.
7.What is the process for return or replacement of TLV1543CFNR?
All TLV1543CFNR units undergo pre-shipment inspection (PSI). If there is an issue with TLV1543CFNR, 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 TLV1543CFNR part is unused and in its original packaging.
Return procedure for TLV1543CFNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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