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Texas Instruments TLC1514IDG4
- Part No.:
- TLC1514IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC1514IDG4.pdf
- Description:
- IC ADC 10BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,647
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Product details
Overview
TLC1514IDG4 from Texas Instruments is a 10-bit, 4-channel, serial analog-to-digital converter (ADC) with 400 kSPS throughput, built-in 4 V reference, and 8× FIFO buffer. It operates from a single 5 V supply, supports SPI/DSP-compatible serial interface up to 20 MHz SCLK, and features hardware/software/auto power-down modes (1 µA max in external-ref power-down). It is used in industrial data acquisition systems requiring low-power, multi-channel sampling with flexible timing control.
For engineers reviewing the TLC1514IDG4 datasheet, TLC1514IDG4 pinout, TLC1514IDG4 application, or TLC1514IDG4 equivalent, this page delivers verified technical context-including SAR architecture, programmable sampling (short/long/extended), pseudo-differential input support, FIFO-triggered interrupt behavior, and precise terminal-level I/O roles-enabling confident selection for embedded measurement and control designs.
Technical Context
The TLC1514IDG4 implements a charge-redistribution successive-approximation (SAR) ADC core with integrated analog multiplexer, sample-and-hold, and 4-V internal reference. Its 4-channel input structure supports both single-ended and pseudo-differential modes (A1 serves as MINUS input when enabled), with source impedance tolerance up to 1 kΩ under normal sampling or extended via CSTART.
It uses a 4-wire SPI-compatible serial interface (CS, SCLK, SDI, SDO) plus optional FS for DSP synchronization, and provides four conversion modes (one-shot, repeat, sweep, repeat-sweep) controlled by a 12-bit configuration register (CFR). The 8-deep FIFO enables burst-mode data capture with programmable interrupt thresholds (1/4, 1/2, 3/4, or full).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1 LSB = 4.88 mV step size at 5 V full-scale, enabling ±0.5 LSB DNL/INL accuracy for precision sensor interfacing. |
| Max Throughput | 400 kSPS - supports real-time sampling of signals up to ~195 kHz Nyquist bandwidth with adequate anti-aliasing filtering. |
| Analog Input Range | 0 V to VCC (5 V) with 500 kHz BW - accommodates unipolar industrial sensors without external level-shifting circuitry. |
| Reference | Internal 4 V or external - eliminates need for external reference IC unless higher accuracy or temperature stability is required. |
| Power Consumption | 6 mA (internal ref) / 4 mA (external ref) active; 1 µA (ext ref, power-down) - enables battery-powered or thermally constrained applications. |
| SNR + Distortion | 59 dB at fi = 12 kHz - sufficient for 9.5 ENOB in audio-grade or vibration monitoring signal chains. |
| Spurious-Free Dynamic Range | 72 dB at fi = 12 kHz - suppresses harmonic distortion critical for clean spectral analysis in instrumentation. |
Pinout & Package
Package: 16-pin SOIC (D) - industry-standard 300-mil wide body, compatible with automated PCB assembly and legacy socket footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDO) | Serial data output | 3-state MSB-first output; driven only during CS-active read cycles; supports daisy-chaining or shared bus configurations. |
| 2 (SDI) | Serial data input | Accepts 16-bit command/config words (MSB first); latched on rising (SPI) or falling (DSP) SCLK edges depending on FS state. |
| 3 (SCLK) | Serial clock input | Up to 20 MHz; serves dual role as interface clock and ADC conversion clock (or SCLK/2 if configured). |
| 4 (EOC/(INT)) | End-of-conversion/interrupt output | Configurable as EOC (mode 00 only) or INT (all other modes); asserts on conversion completion or FIFO threshold breach. |
| 5 (VCC) | Positive supply | Single 5 V ±10% supply; powers analog and digital sections; requires local 0.1 µF + 10 µF decoupling at REFP/REFM. |
| 6–9 (A0–A3) | Analog input channels | Four single-ended inputs; A1 doubles as pseudo-differential MINUS input when CFR.D7 = 1; max 0.2 V ripple allowed on MINUS. |
| 10 (CSTART) | Asynchronous sampling trigger | Falling edge initiates sampling; rising edge ends sampling and starts conversion; independent of SCLK/CS timing for precise control. |
| 11 (GND) | Analog/digital ground | Common return for all circuitry; must be connected to low-impedance system ground plane to maintain 0.5 LSB linearity. |
| 12 (PWDN) | Power-down enable | Logic low disables analog and reference circuits; device resumes operation within microseconds after returning high. |
| 13 (FS) | DSP frame sync input | Optional; resets internal counter and enables SDI on falling edge; used with TMS320-series DSPs to eliminate CS toggling overhead. |
| 14 (REFM) | Reference ground/decoupling | Return for internal 4 V reference or external reference; connect 0.1 µF + 10 µF capacitors between REFM and REFP. |
| 15 (REFP) | Reference voltage input | Connects to internal 4 V reference or external reference source; defines full-scale range (VREFP – VREFM) for ADC conversion. |
| 16 (CS) | Chip select | Active-low enable; resets command counter, enables SDI, and releases SDO from 3-state; may double as FS when dedicated DSP port unavailable. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable sampling period | Short (12 SCLKs) or long (24 SCLKs) normal sampling, or fully asynchronous extended sampling via CSTART - adapts to varying source impedances and system clock constraints. |
| Built-in 8× FIFO with interrupt | Reduces host CPU polling overhead; INT triggers at user-defined FIFO fill levels (1/4 to full), enabling deterministic data capture in sweep/repeat modes. |
| Pseudo-differential input mode | Uses A1 as common-mode rejection node (±0.2 V ripple tolerance), improving noise immunity in noisy industrial environments without external instrumentation amps. |
| Multiple conversion modes | One-shot, repeat, sweep, and repeat-sweep modes - simplifies firmware for static monitoring, dynamic channel scanning, or continuous waveform capture. |
| Auto power-down capability | Enters 5 µA auto power-down after conversion completes in one-shot mode - extends battery life in portable data loggers without software intervention. |
Applications
| Industrial Sensor Monitoring | Portable Data Logger |
|---|---|
|
Use Scenario: Continuous voltage/current readings from 4 RTD or thermocouple front-ends in factory-floor PLC modules. IC Role / Device Role / Timing Role: Primary 10-bit ADC with integrated MUX and FIFO; samples each channel sequentially in sweep mode with INT-driven FIFO reads. Use Value: Eliminates external MUX and reference ICs; 400 kSPS aggregate throughput ensures sub-millisecond per-channel update rates with minimal firmware overhead. |
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and light intensity over 72-hour periods. IC Role / Device Role / Timing Role: Low-power ADC with auto power-down; configured in one-shot mode with CSTART-triggered sampling synchronized to MCU sleep/wake cycles. Use Value: 1 µA power-down current and 4 mA active draw extend runtime; internal 4 V reference removes need for precision external reference, reducing BOM count. |
| Motor Control Feedback | Audio Test Equipment |
|
Use Scenario: Sampling phase currents and DC bus voltage in 3-phase inverter drives for closed-loop torque control. IC Role / Device Role / Timing Role: High-speed 4-channel ADC with extended sampling; CSTART aligned to PWM dead-time to avoid switching noise corruption. Use Value: Asynchronous sampling window control ensures accurate capture during quiet intervals; 500 kHz analog BW supports fast current transducer response. |
Use Scenario: Benchtop audio analyzer capturing 12 kHz test tones for THD+N and SNR measurements. IC Role / Device Role / Timing Role: Precision ADC with 59 dB SNR+D and 72 dB SFDR; configured in repeat mode on single channel with external 5 V reference for repeatability. Use Value: Meets Class 2 audio test requirements; differential input mode rejects ground loop noise from PC-based USB control interfaces. |
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 |
|---|---|---|---|
| TLC1514IPW | Same electrical specs; 20-pin TSSOP package instead of 16-pin SOIC - 0.65 mm pitch, smaller footprint, no lead exposure for reflow. | Preferred for space-constrained PCBs or automated optical inspection (AOI)-friendly layouts; thermal resistance differs slightly due to package geometry. | Select TLC1514IPW when board area is limited or RoHS-compliant lead-free assembly is required; verify thermal derating in high-density layouts. |
| TLC2554IDW | 12-bit resolution, 400 kSPS, pin-compatible upgrade; same SOIC-20 package; adds internal 2.048 V reference and improved INL (±1 LSB). | Suitable for higher-accuracy applications like medical diagnostics or calibration equipment where 10-bit quantization noise is insufficient. | Choose TLC2554IDW when resolution upgrade is needed without redesigning layout; note that REF pins require different decoupling (2.048 V vs 4 V). |
Compared with TLC1514IPW, the TLC1514IDG4 offers identical performance in a through-hole–compatible SOIC package ideal for prototyping and mixed-technology boards; versus TLC2554IDW, it trades 2 bits of resolution for lower cost and simpler reference design, making it optimal for cost-sensitive industrial sensing.
Availability
TLC1514IDG4 is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable data loggers, motor control feedback, and audio test equipment requiring stable component supply across production lifecycles.
Supply support for TLC1514IDG4 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 power management technologies, with decades of heritage in precision data converters and industrial-grade ICs.
The TLC1514IDG4 belongs to TI's legacy precision SAR ADC family designed for low-power, multi-channel industrial measurement systems where integration, reliability, and ease of interface outweigh ultra-high-speed or ultra-high-resolution requirements.
FAQ
What is the maximum sampling rate supported by the TLC1514IDG4?
The TLC1514IDG4 achieves a maximum throughput of 400 kSPS under specified conditions (5 V supply, internal reference, 20 MHz SCLK). This rate assumes optimal timing alignment and accounts for conversion time, sampling period, and serial interface overhead. Real-world sustained rates may be lower depending on host processor latency and FIFO management strategy in sweep or repeat modes.
Does the TLC1514IDG4 require an external reference voltage?
No - the TLC1514IDG4 includes a factory-trimmed 4 V internal reference usable across its operating temperature range. An external reference can be applied via REFP/REFM pins for improved accuracy or custom full-scale ranges, but it is not required. When using the internal reference, CFR.D11 must be set to '1'.
How does the CSTART pin function in the TLC1514IDG4?
The CSTART pin provides hardware-controlled, asynchronous sampling initiation for the TLC1514IDG4. A falling edge starts sampling; a rising edge ends sampling and triggers conversion. This bypasses SCLK dependency, enabling precise timing alignment - for example, synchronizing to PWM dead-time in motor control - and supports high-impedance sources beyond the 1 kΩ limit of normal sampling.
Can the TLC1514IDG4 operate in pseudo-differential mode, and how is it configured?
Yes - the TLC1514IDG4 supports pseudo-differential mode by setting CFR.D7 = 1. In this mode, A1 becomes the common-mode (MINUS) input, while A0, A2, and A3 serve as PLUS inputs. The MINUS input tolerates up to 0.2 V ripple, allowing effective ground-noise rejection without external differential amplifiers.
What are the power-down current specifications for the TLC1514IDG4?
The TLC1514IDG4 supports three power-down states: software/hardware power-down draws ≤1 µA (with external reference) or ≤5 µA (auto power-down mode); both disable analog and reference circuits. Full operation draws 4 mA (external ref) or 6 mA (internal ref) at 5.5 V. Recovery time from power-down is typically <1 µs after PWDN returns high.
TLC1514IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 3, 4
- Input Type:
- Pseudo-Differential, 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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC1514IDG4 FAQ
1.How can I place an order for TLC1514IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC1514IDG4 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 TLC1514IDG4 reliable?
The price and inventory of TLC1514IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC1514IDG4 is usually 5 days.
3.What payment methods are accepted for TLC1514IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC1514IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC1514IDG4?
TLC1514IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC1514IDG4 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 TLC1514IDG4?
For technical support, including TLC1514IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC1514IDG4 requirements.
6.How does Aetrix verify that TLC1514IDG4 is sourced from the original manufacturer or authorized distributors?
All TLC1514IDG4 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 TLC1514IDG4 meets industry standards.
7.What is the process for return or replacement of TLC1514IDG4?
All TLC1514IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC1514IDG4, 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 TLC1514IDG4 part is unused and in its original packaging.
Return procedure for TLC1514IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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