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Texas Instruments TLC3578IPWR
- Part No.:
- TLC3578IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC3578IPWR.pdf
- Description:
- IC ADC 14BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
TLC3578IPWR from Texas Instruments is a 14-bit, 8-channel single-ended SAR analog-to-digital converter (ADC) with SPI/DSP-compatible serial interface, ±10 V bipolar input range, 200-KSPS maximum throughput, and integrated 8× FIFO. It operates from a single 5-V analog supply and 3-/5-V digital supply, targeting precision data acquisition in industrial process control systems.
For engineers reviewing the TLC3578IPWR datasheet, TLC3578IPWR pinout, TLC3578IPWR application, or TLC3578IPWR equivalent, key selection considerations include its 14-bit resolution with ±1 LSB INL, hardware-configurable sampling (normal/short/extended), built-in conversion clock, and TSSOP-20 package compatibility with board-level space constraints.
Technical Context
The TLC3578IPWR implements a charge-redistribution SAR architecture with on-chip analog multiplexer selecting among eight single-ended inputs or three self-test voltages. Its internal 6.5-MHz oscillator serves as default conversion clock, but external SCLK up to 25 MHz may be used for timing flexibility.
Conversion control supports multiple modes: CS-initiated SPI operation, FS-initiated DSP framing, or CSTART-triggered asynchronous sampling. The device features programmable autochannel sweep, hardware-default configuration via SDI tie-high, and dual ground/isolation (AGND/DGND) for noise-sensitive mixed-signal layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit SAR - delivers 16,384 discrete output codes for high-fidelity signal digitization |
| Throughput Rate | 200 KSPS - supports real-time monitoring of fast transients in motor control or power quality analyzers |
| Analog Input Range | ±10 V - accommodates industrial sensor outputs (e.g., 4–20 mA loop receivers with gain stages) without external scaling |
| INL / DNL | ±1 LSB / ±0.5 LSB - ensures monotonicity and minimal code-width variation across full scale for closed-loop feedback accuracy |
| Power Consumption | 5.8 mA normal / 20 µA power-down - enables low-energy operation in battery-backed or energy-harvesting DAQ nodes |
| SPI Clock Support | Up to 25 MHz SCLK - allows high-speed data streaming to FPGA or DSP hosts with minimal interface latency |
| Reference Inputs | REFP/REFM differential pair - accepts external 4-V reference (±0.04% full-scale error) for stable absolute measurement accuracy |
Pinout & Package
Package: 20-pin TSSOP (PW), 4.4 mm × 6.5 mm, 0.65 mm pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Drives data transfer timing; doubles as external conversion clock source when enabled |
| FS | Frame sync input | Indicates start of serial frame in DSP mode; must be tied to DVDD if unused in SPI configuration |
| SDI | Serial data input | Accepts 4-bit command + optional 12-bit config; tied to DVDD for hardware-default initialization |
| EOC/INT | End-of-conversion interrupt output | Active-low pulse signals data readiness; cleared by CS↓, FS↑, or CSTART↓ |
| SDO | 3-state serial data output | MSB-first 14-bit result; high-impedance when CS is high to support multi-device bus sharing |
| DGND | Digital ground return | Isolates digital switching noise from analog section; requires separate PCB pour from AGND |
| DVDD | Digital supply (3–5 V) | Power domain for logic and interface; decoupled with 0.1 µF ceramic near pin |
| CS | Chip select input | Enables serial interface and releases SDO; falling edge resets internal 4-bit counter |
| A0–A7 | Analog input channels | Eight single-ended inputs; source impedance ≤25 Ω required for normal sampling fidelity |
| CSTART | External sampling trigger | Controls hold time independently of SCLK; low pulse initiates sampling, high transition starts conversion |
| AVDD | Analog supply (4.75–5.5 V) | Power domain for SAR core and MUX; requires low-noise regulation and 10 µF + 0.1 µF decoupling |
| AGND | Analog ground return | Reference for all analog circuitry; star-connected to AVDD decoupling and REFP/REFM |
| COMP | Internal compensation | Requires 0.1 µF capacitor to AGND to stabilize internal op-amp feedback loop |
| REFM | Negative reference input | Connected directly to AGND; establishes lower rail of ±10 V input range |
| REFP | Positive reference input | Accepts 4 V reference; 10 µF + 0.1 µF decoupling mandatory for AC performance |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 8× FIFO buffer | Reduces host CPU overhead by enabling burst reads of up to eight conversions without per-sample polling |
| Pseudodifferential input capability | Allows rejection of common-mode noise on paired channels (e.g., A0/A1) without external instrumentation amps |
| Programmable autochannel sweep | Automatically sequences through selected analog inputs-ideal for multi-sensor monitoring in PLC I/O modules |
| Hardware-default configuration | Eliminates firmware initialization when SDI is tied to DVDD-accelerates bring-up in fixed-function embedded systems |
| Extended sampling via CSTART | Supports high-impedance sensor interfaces (e.g., thermocouples, RTDs) by decoupling sample aperture from SCLK frequency |
Applications
| Industrial Process Monitoring | Motor Drive Current Sensing |
|---|---|
Use Scenario: Continuous voltage/current measurement from field transmitters (4–20 mA, ±10 V) in distributed control systems. IC Role / Device Role / Timing Role: Primary ADC front-end digitizing analog sensor outputs with 14-bit resolution and ±1 LSB linearity. Use Value: Enables sub-0.01% full-scale accuracy for regulatory compliance in flow, pressure, and temperature loops. |
Use Scenario: Real-time phase current sampling in 3-phase inverter drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: High-throughput ADC capturing synchronized current waveforms at 200 KSPS with deterministic latency. Use Value: Supports precise torque ripple suppression and overcurrent protection with <2.9 µs conversion time using external SCLK. |
| Programmable Logic Controller (PLC) I/O Module | Test & Measurement Equipment |
Use Scenario: Modular analog input card acquiring data from up to eight sensors with channel isolation and anti-aliasing. IC Role / Device Role / Timing Role: Channel-multiplexed ADC with programmable sweep and FIFO buffering for deterministic scan-cycle execution. Use Value: Reduces host controller load and eliminates missed samples during rapid channel switching in cyclic executive environments. |
Use Scenario: Benchtop multimeter or data logger requiring calibrated DC accuracy and low THD for waveform analysis. IC Role / Device Role / Timing Role: Precision ADC subsystem delivering 79 dB SINAD and −82 dB THD at 20 kHz input frequency. Use Value: Meets Class II portable instrument specifications with 12.8 ENOB and <±0.04% full-scale error stability over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IPW | 16-bit resolution, 100-KSPS, no internal FIFO, SPI-only interface, 2.7–5.5 V supply | Higher resolution but lower speed; lacks pseudodifferential mode and auto-sweep capability | Select for ultra-precision DC measurements where throughput >100 KSPS is not required |
| MAX11623ETE+ | 14-bit, 250-KSPS, internal reference, 2.7–3.6 V digital supply only, no CSTART pin | Lower power (2.5 mA), smaller 16-pin TQFN, but limited to unipolar 0–VREF input range | Select for compact, low-voltage battery-powered sensors needing ±10 V range via external level-shifting |
Compared with ADS8325IPW and MAX11623ETE+, the TLC3578IPWR uniquely combines 200-KSPS throughput, ±10 V bipolar input, hardware-configurable sampling, and 8× FIFO in a 20-pin TSSOP-making it optimal for industrial DAQ where channel count, interface flexibility, and mixed-signal noise immunity are critical.
Availability
TLC3578IPWR is available at Aetrix Electronics and suitable for industrial process monitoring, motor drive current sensing, PLC I/O modules, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC3578IPWR 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 IC design.
The TLC3578IPWR belongs to TI's high-performance SAR ADC product line, engineered specifically for demanding industrial automation applications requiring robustness, wide input range, and flexible digital interfacing.
FAQ
What is the maximum sampling rate achievable with the TLC3578IPWR?
The TLC3578IPWR achieves a maximum throughput of 200 KSPS under normal long-sampling conditions with fixed-channel operation in conversion mode 00 or 01. This rate assumes internal 6.5-MHz OSC clocking and accounts for multiplexer settling time; channel-switching reduces effective rate due to DAC memory effect.
Does the TLC3578IPWR support true differential input mode?
No, the TLC3578IPWR does not support true differential input. It provides eight single-ended analog inputs (A0–A7) and supports pseudodifferential operation-where one channel acts as reference for another-but lacks dedicated differential input pairs or internal subtractor circuitry.
How is the TLC3578IPWR initialized without software configuration?
The TLC3578IPWR enters hardware-default mode when SDI is tied to DVDD at power-on. In this state, it uses factory-programmed configuration: fixed-channel mode, internal OSC clock, normal long sampling, and SPI interface-enabling immediate conversion without host firmware setup.
What is the function of the COMP pin on the TLC3578IPWR?
The COMP pin on the TLC3578IPWR connects to an internal op-amp compensation node. A 0.1 µF capacitor must be placed between COMP and AGND to ensure stable operation of the internal signal-scaling amplifier and prevent oscillation during conversion cycles.
Can the TLC3578IPWR operate with a 3.3-V digital supply while maintaining full analog performance?
Yes, the TLC3578IPWR supports DVDD from 2.7 V to 5.5 V. When powered with 3.3 V, digital I/O levels remain compatible (VIH = 2.1 V min), and analog performance-including 14-bit resolution, ±1 LSB INL, and 79 dB SINAD-is fully preserved, as AVDD remains independent at 5 V.
TLC3578IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 4, 8
- 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
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC3578IPWR FAQ
1.How can I place an order for TLC3578IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC3578IPWR 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 TLC3578IPWR reliable?
The price and inventory of TLC3578IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC3578IPWR is usually 5 days.
3.What payment methods are accepted for TLC3578IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC3578IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC3578IPWR?
TLC3578IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC3578IPWR 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 TLC3578IPWR?
For technical support, including TLC3578IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC3578IPWR requirements.
6.How does Aetrix verify that TLC3578IPWR is sourced from the original manufacturer or authorized distributors?
All TLC3578IPWR 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 TLC3578IPWR meets industry standards.
7.What is the process for return or replacement of TLC3578IPWR?
All TLC3578IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC3578IPWR, 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 TLC3578IPWR part is unused and in its original packaging.
Return procedure for TLC3578IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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