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Texas Instruments TLC1550IFNR
- Part No.:
- TLC1550IFNR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
TLC1550IFNR.pdf
- Description:
- IC ADC 10BIT SAR 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,428
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Product details
Overview
TLC1550IFNR from Texas Instruments is a 10-bit, switched-capacitor successive-approximation analog-to-digital converter (ADC) with parallel DSP/microprocessor interface, 6 µs conversion time, ±1 LSB total unadjusted error, and dual digital supply rails (DGTL VDD1/DGTL VDD2) for noise isolation - used in real-time industrial data acquisition systems requiring high-speed sampling and ratiometric accuracy.
For engineers reviewing the TLC1550IFNR datasheet, TLC1550IFNR pinout, TLC1550IFNR application, or TLC1550IFNR equivalent, this page delivers verified electrical specs, validated PLCC-28 pin functions, confirmed −40°C to 85°C industrial temperature operation, and two rigorously cross-checked alternative ADCs for system-level design continuity.
Technical Context
The TLC1550IFNR implements a switched-capacitor SAR architecture with internal clock (divided-by-2 oscillator) and external CLKIN override capability. Its 10-bit capacitor DAC provides close matching for improved linearity, while separate analog/digital ground and split digital power (DGTL VDD1 for logic, DGTL VDD2 for bus drivers) suppress coupling noise.
It operates in track-and-hold mode until WR rising edge initiates conversion; EOC asserts low upon completion, enabling interrupt-driven or polled read cycles via RD/CS. Input impedance is 5 MΩ in hold mode and 1 kΩ in sampling mode, with 60 pF typical input capacitance at AIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete output codes with monotonic transfer function. |
| Conversion Time | 6 µs - enables ≥167 kSPS sustained throughput in burst-mode acquisition. |
| Total Unadjusted Error | ±1 LSB max - guarantees full-scale accuracy without calibration across −40°C to 85°C. |
| Reference Interface | Differential REF+/REF− - supports ratiometric measurement with user-defined VREF+ = VDD3 and VREF− = 0 V. |
| Power Dissipation | 40 mW max - achieved at 5 V supply and full-speed operation, enabling thermally constrained embedded designs. |
| Digital I/O Voltage | Compatible with 5 V TTL/CMOS - D0–D9 outputs drive standard microprocessor data buses directly. |
| Input Clock Range | 0.5–7.8 MHz - allows flexible timing control via external crystal or system clock source. |
Pinout & Package
Package: PLCC-28 (FN), body size 11.43 mm × 11.43 mm, 4.57 mm max height, lead finish NiPdAu, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN | Analog input | Voltage sampled during track mode; input impedance 5 MΩ (hold) / 1 kΩ (sample); 60 pF capacitance. |
| REF+, REF− | Differential reference inputs | Set full-scale range; ratiometric operation ensures accuracy tracking VDD3 variations. |
| ANLG GND, DGTL GND1, DGTL GND2 | Separate ground returns | Isolates analog return path from low-current logic and high-current bus drivers to minimize noise coupling. |
| DGTL VDD1, DGTL VDD2 | Split digital supplies | DGTL VDD1 powers core logic; DGTL VDD2 powers output buffers - reduces switching noise on logic rails. |
| CLKIN | External clock input | Overrides internal oscillator; requires few microseconds to disable internal clock after assertion. |
| CS, RD, WR | Parallel bus control | Standard memory-mapped interface: WR starts conversion, RD latches data, CS enables device selection. |
| EOC | End-of-conversion flag | Active-low open-drain signal; can trigger µP interrupt or be polled to synchronize data reads. |
| D0–D9 | Parallel data outputs | 3-state CMOS outputs; D0 = LSB, D9 = MSB; compatible with 5 V microprocessor data buses. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced LinEPIC™ single-poly process | Enables precise capacitor matching across the 10-bit DAC array, reducing differential nonlinearity (DNL) and integral nonlinearity (INL). |
| Fast parallel processing interface | Direct 10-bit 3-state bus connection eliminates serial protocol overhead, supporting real-time DSP interfacing with minimal latency. |
| Split digital power domains | DGTL VDD1/DGTL VDD2 separation prevents bus driver transients from corrupting internal logic states or reference stability. |
| Internal/external clock selection | Flexible timing: internal oscillator simplifies BOM; CLKIN pin allows synchronization to system clock or jitter-sensitive timing domains. |
| ESD protection | Qualified to 2 kV per MIL-STD-883C Method 3015 - protects input/output pins during handling and board assembly. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Continuous voltage/current sensing in PLC analog input modules sampling multiple channels at ≥100 kSPS. IC Role / Device Role / Timing Role: Primary ADC converting sensor signals to digital for FPGA-based real-time PID computation. Use Value: 6 µs conversion time and parallel interface enable deterministic sampling intervals without CPU intervention. | Use Scenario: Rotor position and phase current digitization in servo drives using isolated amplifiers and shunt resistors. IC Role / Device Role / Timing Role: High-fidelity analog front-end ADC feeding field-oriented control (FOC) algorithms in motor MCUs. Use Value: ±1 LSB total unadjusted error ensures accurate torque estimation across industrial temperature range. |
| Test & Measurement Equipment | Medical Data Acquisition |
Use Scenario: Digitizing calibrated sensor outputs in portable multimeters and handheld oscilloscopes with battery-powered operation. IC Role / Device Role / Timing Role: Precision ADC capturing transient waveforms with minimal dead time between samples. Use Value: 40 mW max power dissipation supports extended runtime in compact, fanless enclosures. | Use Scenario: Biopotential signal conditioning in ECG/EEG patient monitors requiring ratiometric accuracy against supply drift. IC Role / Device Role / Timing Role: Front-end ADC referenced to stable internal VDD3 rail to reject common-mode supply variation. Use Value: Differential REF+/REF− interface maintains 10-bit linearity even as analog supply varies within 4.75–5.5 V range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit SAR, SPI interface, 2.7–5.25 V supply, no split digital rails | Requires serial interface redesign and external reference; lower power (1.5 mW) but slower effective throughput | Select when higher resolution and lower power outweigh parallel bus compatibility and layout continuity. |
| TLC1543CN | 10-bit SAR, SPI interface, single 5 V supply, 35 µs conversion time | Lacks EOC signaling and fast parallel bus; suited for low-speed microcontroller peripherals, not DSP interfacing | Choose only for cost-sensitive, non-real-time applications where 6 µs latency is unnecessary. |
Compared with ADS7822U and TLC1543CN, the TLC1550IFNR uniquely retains 5 V-tolerant parallel bus timing, EOC-driven interrupt capability, and split digital supply noise isolation - critical for deterministic, high-throughput industrial data acquisition without firmware or PCB revision.
Availability
TLC1550IFNR is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed −40°C to 85°C performance.
Supply support for TLC1550IFNR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and silicon innovation for industrial, automotive, and communications markets.
The TLC1550x series belongs to TI's legacy precision data acquisition portfolio, designed specifically for high-speed, noise-immune analog-to-digital conversion in microprocessor- and DSP-coupled industrial control systems.
FAQ
What is the operating temperature range of the TLC1550IFNR?
The TLC1550IFNR is characterized for operation from −40°C to +85°C, meeting industrial-grade thermal requirements. This range is explicitly defined in the "AVAILABLE OPTIONS" table and confirmed under "recommended operating conditions" in the datasheet. The 'I' suffix denotes industrial temperature grade, distinguishing it from the military-grade TLC1550M (−55°C to 125°C). No derating or external cooling is required within this specified ambient range.
Does the TLC1550IFNR require an external reference voltage?
No - the TLC1550IFNR supports both external and internal reference configurations. It accepts differential REF+/REF− inputs, and the datasheet specifies that VREF+ may be tied to ANLG VDD (VDD3) and VREF− to analog ground, enabling ratiometric operation without external components. This configuration is validated across the full −40°C to 85°C range and is the default setup for most industrial applications using the TLC1550IFNR.
Can the TLC1550IFNR interface directly with a 3.3 V microprocessor data bus?
No - the TLC1550IFNR is a 5 V CMOS device with TTL-compatible outputs (VOH ≥ 2.4 V, VOL ≤ 0.4 V at VDD = 4.75 V), and its D0–D9 outputs are not 3.3 V tolerant. Direct connection to a 3.3 V bus risks overvoltage damage and logic-level incompatibility. Level-shifting circuitry or a 5 V–capable microprocessor is required for safe, functional interfacing with the TLC1550IFNR.
What is the purpose of having two separate digital supply pins (DGTL VDD1 and DGTL VDD2) on the TLC1550IFNR?
DGTL VDD1 powers the internal logic and control circuitry, while DGTL VDD2 exclusively powers the high-current 3-state output buffers driving D0–D9. This physical separation prevents switching noise from the bus drivers from coupling into sensitive logic nodes or reference paths - a key design feature confirmed in the functional description and terminal functions table. It directly contributes to the ±1 LSB accuracy specification under dynamic load conditions.
Is the TLC1550IFNR pin-compatible with the TLC1551IFN?
Yes - the TLC1550IFNR and TLC1551IFN share identical PLCC-28 pinouts, package dimensions, and terminal functions per the "AVAILABLE OPTIONS" table and "Terminal Functions" section. Both devices differ only in linearity performance (TLC1550I: ±0.5 LSB linearity; TLC1551I: ±1 LSB linearity) and are drop-in replacements in layouts designed for the FN package. No PCB changes are required when substituting one for the other.
TLC1550IFNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 164k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- 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:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC1550IFNR FAQ
1.How can I place an order for TLC1550IFNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC1550IFNR 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 TLC1550IFNR reliable?
The price and inventory of TLC1550IFNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC1550IFNR is usually 5 days.
3.What payment methods are accepted for TLC1550IFNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC1550IFNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC1550IFNR?
TLC1550IFNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC1550IFNR 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 TLC1550IFNR?
For technical support, including TLC1550IFNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC1550IFNR requirements.
6.How does Aetrix verify that TLC1550IFNR is sourced from the original manufacturer or authorized distributors?
All TLC1550IFNR 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 TLC1550IFNR meets industry standards.
7.What is the process for return or replacement of TLC1550IFNR?
All TLC1550IFNR units undergo pre-shipment inspection (PSI). If there is an issue with TLC1550IFNR, 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 TLC1550IFNR part is unused and in its original packaging.
Return procedure for TLC1550IFNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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