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Texas Instruments TLC2554ID
- Part No.:
- TLC2554ID
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC2554ID.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,093
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Product details
Overview
TLC2554ID from Texas Instruments is a 12-bit, 4-channel, serial analog-to-digital converter (ADC) operating from a single 5-V supply with 400 kSPS maximum throughput, ±1 LSB differential/integral nonlinearity, and built-in 4-V reference - used in industrial data acquisition systems requiring low-power, SPI-compatible digitization of sensor signals with hardware- or software-controlled sampling.
For engineers reviewing the TLC2554ID datasheet, TLC2554ID pinout, TLC2554ID application, or TLC2554ID equivalent, this page delivers verified technical context, validated pin functions, confirmed conversion modes (single-shot, repeat, sweep), real-world FIFO behavior, and precise alternative selection guidance for embedded measurement systems.
Technical Context
The TLC2554ID implements a 12-bit successive-approximation register (SAR) ADC with internal 4-V reference and 8× deep FIFO, supporting both normal (12/24 SCLK sampling) and extended (CSTART-triggered) sampling. It uses charge redistribution across binary-weighted capacitors and features break-before-make analog multiplexing for 4-channel input selection.
Its SPI/DSP-compatible serial interface operates with SCLK up to 20 MHz, supports unipolar binary or 2's complement output formats, and enables four conversion modes (one-shot, repeat, sweep, repeat-sweep) via a 12-bit configuration register (CFR). Power-down modes include software/hardware/auto (1 µA max with external reference).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR architecture delivering 4096 discrete output codes with monotonic transfer function. |
| Max Throughput | 400 kSPS - achieved using 20-MHz SCLK as conversion clock source; full 12-bit result available per sample. |
| DNL/INL | ±1 LSB - ensures no missing codes and accurate linearity for precision sensor interfacing. |
| SNDR | 69 dB at fi = 12 kHz - defines usable dynamic range for audio-band and vibration monitoring applications. |
| SFDR | 75 dB at fi = 12 kHz - indicates spurious-free performance critical for spectral analysis and FFT-based processing. |
| Analog Input Range | 0 V to VCC (5 V) with 500-kHz bandwidth - supports direct connection to resistive sensors and op-amp outputs without level-shifting. |
| Power Consumption | 6 mA at 5.5 V with internal reference; 4 mA with external reference - enables battery-powered operation with programmable auto power-down. |
Pinout & Package
Package: 16-pin SOIC (D) and 16-pin TSSOP (PW); TLC2554ID is specified for –40°C to +85°C operation and shipped in SOIC-D package per TI's available options table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial interface; resets internal counter and enables SDI/SDO; doubles as FS when dedicated serial port used. |
| SDI | Serial Data Input | MSB-first command/data input (4-bit CMR + 12-bit CFR); accepts SPI- or DSP-frame-sync-aligned data depending on FS state. |
| SCLK | Serial Clock | Up to 20-MHz input clock used for data shifting and as conversion clock source (or SCLK/2 if configured). |
| SDO | Serial Data Output | 3-state MSB-first output carrying conversion results (12 bits + 4 zeros), CFR contents, or FIFO data; timing depends on FS mode. |
| EOC/(INT) | End-of-Conversion / Interrupt | Configurable as EOC (mode 00 only) or INT (all other modes); falling edge signals ready data; cleared by CS↓ or FS↑. |
| PWDN | Power-Down Control | Logic-low disables analog and reference circuits; device resumes operation after CS or CSTART activation and PWDN high. |
| CSTART | Asynchronous Sampling Trigger | Hardware-controlled start/stop of sampling period; rising edge initiates conversion; low time sets sampling duration for high-Z sources. |
| A0–A3 | Analog Inputs | Four single-ended or pseudo-differential inputs; A1 serves as MINUS input in pseudo-diff mode, limiting channel count to 3 active. |
| REFP / REFM | Reference Terminals | Support internal 4-V reference (REFP = VCC, REFM = GND) or external reference; require 10-µF + 0.1-µF decoupling. |
| VCC / GND | Supply & Ground | Single 5-V supply; all voltage measurements referenced to GND; layout-sensitive for noise immunity in mixed-signal designs. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sampling Period | Short (12 SCLKs) or long (24 SCLKs) normal sampling; plus CSTART-driven extended sampling for >1-µs control over aperture time. |
| Auto Channel Sweep | Configurable 4-channel sequence (0–1–2–3, 0–0–1–1, etc.) with FIFO-triggered interrupt; supports continuous multi-sensor monitoring. |
| On-Chip 4-V Reference | Stable internal reference eliminates need for external precision reference; selectable via CFR.D11; reduces BOM count and board space. |
| 8× Deep FIFO Buffer | Stores up to eight 12-bit conversions; enables burst acquisition without host CPU intervention; threshold-triggered INT minimizes polling overhead. |
| Low-Power Auto Power-Down | 1 µA max quiescent current in auto power-down mode; activated automatically after conversion completion; ideal for intermittent sensing. |
Applications
| Industrial Sensor Monitoring | Portable Data Loggers |
|---|---|
|
Use Scenario: Continuous temperature, pressure, and humidity readings from 4 RTD/thermistor channels in factory-floor PLC modules. IC Role / Device Role / Timing Role: Primary 12-bit digitizer with programmable sweep mode, FIFO buffering, and auto power-down between samples. Use Value: Eliminates external multiplexer and reference IC; 400 kSPS throughput supports oversampling for noise reduction; ±1 LSB INL ensures calibration stability over temperature. |
Use Scenario: Battery-powered environmental logger capturing hourly snapshots from analog gas and particulate sensors. IC Role / Device Role / Timing Role: Low-quiescent ADC with hardware-triggered sampling (CSTART) and auto power-down to extend battery life beyond 1 year. Use Value: 1 µA auto power-down current and 6 mA active current at 5.5 V enable multi-year operation on coin-cell; SPI interface simplifies MCU integration. |
| Motor Control Feedback | Test & Measurement Front-End |
|
Use Scenario: Real-time current/voltage sensing in BLDC motor drives with simultaneous sampling of phase currents and bus voltage. IC Role / Device Role / Timing Role: High-speed, synchronized 4-channel ADC with short sampling period (12 SCLKs) and repeat-sweep mode for deterministic latency. Use Value: 400 kSPS throughput supports 100-kHz PWM switching harmonics capture; pseudo-differential mode rejects common-mode noise from gate drivers. |
Use Scenario: Modular benchtop instrument front-end acquiring calibrated analog signals from transducers and signal generators. IC Role / Device Role / Timing Role: Precision ADC with internal 4-V reference, 69 dB SNDR, and configurable output format (binary/2's complement) for flexible firmware handling. Use Value: ±1 LSB DNL/INL and 75 dB SFDR meet Class I accuracy requirements; SPI interface allows daisy-chaining multiple units for parallel acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200 kSPS, no FIFO, external reference only, SPI-only (no FS/CSTART), 3.3-V supply. | Lower resolution and speed; lacks sweep/FIFO; suited for cost-sensitive, low-complexity 8-bit systems. | Select when 8-bit accuracy suffices and 3.3-V operation is mandatory; avoid if 12-bit linearity or multi-channel automation required. |
| MCP3204-I/P | 12-bit, 100 kSPS, 4-channel, SPI-only, no CSTART, no FIFO, no internal reference, 2.7–5.5-V supply. | No auto-sweep or hardware sampling control; limited to basic sequential reads; lower throughput constrains real-time response. | Choose for simple, low-throughput sensor reading where TI's advanced timing control and power management are unnecessary. |
Compared with ADS7822U and MCP3204-I/P, the TLC2554ID uniquely combines 12-bit precision, 400 kSPS speed, 4-channel auto-sweep, 8× FIFO, CSTART-triggered sampling, and integrated 4-V reference - making it the only option among the three suitable for deterministic, low-power, multi-sensor industrial acquisition with minimal external components.
Availability
TLC2554ID is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable data loggers, motor control feedback, and test & measurement front-end applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC2554ID 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 digital signal technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The TLC2554ID belongs to TI's legacy high-performance SAR ADC family designed specifically for low-power, multi-channel industrial data acquisition - emphasizing robust serial interfacing, flexible sampling control, and integrated reference functionality.
FAQ
What is the maximum sampling rate supported by the TLC2554ID?
The TLC2554ID achieves a maximum throughput of 400 kSPS when using a 20-MHz SCLK as the conversion clock source. This rate is sustained across all four analog input channels in sweep or repeat-sweep mode, with each 12-bit conversion completed within 1.6 µs. The actual achievable rate depends on SCLK frequency, sampling period configuration (short/long), and selected conversion mode.
Does the TLC2554ID include an internal voltage reference?
Yes, the TLC2554ID integrates a 4-V internal reference that can be selected via bit D11 in the Configuration Register (CFR). When enabled, REFP connects internally to VCC and REFM to GND. External reference operation is also supported, offering flexibility for applications requiring higher accuracy or different voltage scaling.
How does the CSTART pin function in the TLC2554ID?
The CSTART pin provides asynchronous, hardware-controlled sampling initiation for the TLC2554ID. A high-to-low transition starts sampling; a low-to-high transition ends sampling and begins conversion. Its low time directly controls sampling duration - enabling extended aperture times for high-impedance sources beyond what SCLK-based sampling allows.
What are the valid conversion modes for the TLC2554ID?
The TLC2554ID supports four conversion modes defined by CFR bits D6–D5: one-shot (00), repeat (01), sweep (10), and repeat-sweep (11). Each mode determines how channels are selected, whether FIFO is used, how interrupts are generated, and how sampling is triggered - allowing optimization for single-point measurement, continuous single-channel logging, or automated multi-channel acquisition.
Can the TLC2554ID operate with a 3.3-V supply?
No - the TLC2554ID is specified for single-supply operation from 4.5 V to 5.5 V, with typical performance characterized at 5 V. It is not rated for 3.3-V operation; attempting to power it from 3.3 V may result in undefined behavior, failure to meet AC specifications (e.g., SNDR, throughput), or inability to drive logic thresholds reliably. For 3.3-V systems, consider TI's ADS7822 or newer 3.3-V-compatible ADCs.
TLC2554ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- 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:
- -
TLC2554ID FAQ
1.How can I place an order for TLC2554ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2554ID 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 TLC2554ID reliable?
The price and inventory of TLC2554ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2554ID is usually 5 days.
3.What payment methods are accepted for TLC2554ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2554ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2554ID?
TLC2554ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2554ID 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 TLC2554ID?
For technical support, including TLC2554ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2554ID requirements.
6.How does Aetrix verify that TLC2554ID is sourced from the original manufacturer or authorized distributors?
All TLC2554ID 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 TLC2554ID meets industry standards.
7.What is the process for return or replacement of TLC2554ID?
All TLC2554ID units undergo pre-shipment inspection (PSI). If there is an issue with TLC2554ID, 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 TLC2554ID part is unused and in its original packaging.
Return procedure for TLC2554ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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