TLC1541IFNG3 - 10-Bit, 32 kSPS, 11-Ch SAR ADC | Texas Instruments
MPN: TLC1541IFNG3 ✓ Hoạt độngTLC1541IFNG3 Tóm tắt
A SAR ADC is a successive-approximation analog-to-digital converter, a subtype of ADC architecture that performs a binary search across the analog input range using an internal sample-and-hold and a comparator. Within the broader hierarchy, SAR ADCs belong to the direct-conversion ADC family (versus delta-sigma, dual-slope, and pipeline ADCs) and are widely used in data acquisition, process control, and instrumentation applications where moderate resolution (8-16 bit) and low latency are required. The TLC1541 family, which includes 11 multiplexed input channels, was designed as a microprocessor peripheral or standalone data-acquisition front-end, with on-chip track-and-hold, internal clock, and self-test modes.
Key features include 11 analog input channels (10 external + 1 self-test), on-chip 12-channel analog multiplexer, software-configurable unipolar/bipolar input modes, and a maximum linearity error of ±1 LSB at 10 bits. The device operates from a single +5 V analog supply with a separate digital supply pin for noise isolation. The 20-pin PLCC (J-lead, FN) package provides socket-friendly through-hole-style mounting on SMT boards, simplifying prototyping and field replacement compared with fine-pitch QFN packages.
The architecture combines a charge-redistribution DAC for successive approximation with a sample-and-hold front-end, allowing it to settle a full 10-bit conversion in 21 µs. The serial interface (compatible with TMS320 and SPI-style peripherals) reduces pin count versus parallel-output ADCs of similar resolution, simplifying PCB routing on dense mixed-signal boards. The built-in self-test voltage (Vref) plus channel 11 self-test address enables on-command verification of converter integrity without external stimuli.
Typical applications include multi-channel data acquisition front-ends, industrial process-control analog input modules, portable instrumentation and panel meters, and embedded sensor digitizers. The wide input range (0-5 V with 5 V supply) and bipolar-mode flexibility also suit transducer-signal conditioning for thermocouples, RTDs, and strain-gauge bridges through external signal conditioning.
When designing with this part, place the analog and digital supply pins close to low-impedance decoupling (typically 10 µF bulk + 0.1 µF ceramic) and keep analog/digital ground returns separated to a single-point tie under the IC. The SAR input draws transient current during conversion, so source impedance above 1 kΩ may degrade linearity unless an external input buffer is added.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not collected in any single distributor listing or the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho TLC1541IFNG3 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TLC1541IFNG3 (cùng hình factor và footprint) — khác nhau ở Package, Architecture, Resolution, Data Interface, Digital Supply Voltage.
TLC1541IFNR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TLC1541CFNG3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLC1541CFNR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TLC1541CDWRG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TLC1541IFNG3 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bit |
| Number of Analog Input Channels | 11 (10 external + 1 self-test) |
| Conversion Architecture | SAR (Successive Approximation Register) |
| Tỷ lệ lấy mẫu | 32 kSPS |
| Conversion Time | 21 µs (typical) |
| Analog Input Voltage Range | 0 V to 5.5 V (with 5 V supply) |
| Data Interface | Serial (3-state output, 4-wire control) |
| Integral Linearity Error (max) | ±1 LSB (±0.0977 %) |
| Điện áp cung cấp | +5 V (analog); separate digital supply pin |
| On-Chip Features | Sample-and-hold, 12-channel analog MUX, self-test voltage, internal oscillator |
| Input Modes | Software-configurable unipolar / bipolar |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (industrial) |
| Hộp | 20-pin PLCC (FN) J-lead, 9x9 mm |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tube |
| Trạng thái RoHS | Compliant |
Cấu hình chân TLC1541IFNG3
| Chân 1 | AIN0 — Analog input channel 0 |
| Chân 2 | AIN1 — Analog input channel 1 |
| Chân 3 | AIN2 — Analog input channel 2 |
| Chân 4 | AIN3 — Analog input channel 3 |
| Chân 5 | AIN4 — Analog input channel 4 |
| Chân 6 | AIN5 — Analog input channel 5 |
| Chân 7 | AIN6 — Analog input channel 6 |
| Chân 8 | AIN7 — Analog input channel 7 |
| Chân 9 | AIN8 — Analog input channel 8 |
| Chân 10 | AIN9 — Analog input channel 9 |
| Chân 11 | AIN10/SELF-TEST — Analog input channel 10 / self-test voltage |
| Chân 12 | REF+ — Reference voltage positive input |
| Chân 13 | REF- — Reference voltage negative input (analog ground) |
| Chân 14 | AVCC — Analog +5 V supply |
| Chân 15 | AGND — Analog ground |
| Chân 16 | CS — Chip select (active low) for serial interface |
| Chân 17 | I/O CLOCK — Serial data clock input |
| Chân 18 | ADDRESS — Serial address input for channel select |
| Chân 19 | EOC — End-of-conversion output (active low) |
| Chân 20 | DOUT — Serial data output (3-state) |
Ứng dụng tiêu biểu
TLC1541IFNG3 phù hợp cho 7 Áp dụngs: Multi-Channel Data Acquisition Front-End, Industrial Process Control Analog Input Modules, Portable Instrumentation and Panel Meters, Embedded Sensor Digitizers, Automated Test Equipment (ATE) Card Digitizers, Battery Monitoring and Energy-Management Inputs, Automotive Sensor Signal Conditioning Modules.
Multi-Channel Data Acquisition Front-End
The TLC1541IFNG3 fits data-acquisition front-ends by combining an 11-channel analog multiplexer with a 10-bit SAR converter in one IC, eliminating external channel-switching components. With a 32 kSPS aggregate rate (21 µs conversion time), a single TLC1541IFNG3 can sequentially digitize up to 10 sensor channels at rates above 2 kSPS each. The serial output reduces pin count versus parallel-output ADCs, simplifying routing on dense mixed-signal boards where multiple sensor rails converge at the controller.
Được đề xuất
Industrial Process Control Analog Input Modules
In industrial process-control PLC analog input modules, the TLC1541IFNG3's industrial -40C to +85C temperature range and 0-5 V analog input span match standard transducer outputs (4-20 mA across 250 Ω, or 0-10 V divided). The on-chip 12-channel MUX handles multiple thermocouple/RTD/strain-gauge signals through external signal conditioning. The built-in self-test voltage (channel 11) lets the host periodically verify converter integrity for SIL-class safety diagnostics.
Được đề xuất
Portable Instrumentation and Panel Meters
Portable instrumentation such as handheld multimeters and panel meters benefits from the TLC1541IFNG3's single +5 V supply operation and low power consumption, allowing battery-powered operation with simple regulator rails. The 10-bit resolution is adequate for 3.5-digit panel-meter display accuracy, and the 11-channel input supports voltage, current, and temperature measurements in a single instrument. The PLCC package is rugged against vibration and field-replaceable without specialized tooling.
Được đề xuất
Embedded Sensor Digitizers
The TLC1541IFNG3 digitizes embedded sensor arrays (temperature, pressure, humidity, position) by multiplexing multiple low-bandwidth analog signals into a single MCU-friendly serial stream. With 32 kSPS throughput and software-configurable unipolar/bipolar modes, it adapts to single-ended bridge sensors (load cells, strain gauges) as well as ratiometric RTD/thermistor dividers. The serial interface is compatible with most MCU SPI peripherals and TMS320 DSP serial ports.
Được đề xuất
Automated Test Equipment (ATE) Card Digitizers
In ATE pin-cards and boundary-scan test fixtures, the TLC1541IFNG3's 11-channel MUX allows per-pin analog monitoring of DUT signals with 10-bit resolution and 32 kSPS sample rates. The on-chip sample-and-hold captures fast transients, and the serial output interfaces cleanly with rack-controller backplanes over a 4-wire bus. The PLCC socket-compatibility simplifies card-level field replacement during calibration cycles.
Được đề xuất
Battery Monitoring and Energy-Management Inputs
Battery management and energy-storage systems use the TLC1541IFNG3 to digitize per-cell voltage, pack current (across a shunt), and temperature sensors in a single IC. The 11-channel MUX accommodates 8-12 cell chemistries with auxiliary temperature inputs, and the 0-5.5 V input range (with 5 V supply) directly handles Li-ion cell voltages when used with external dividers. The serial output streams to a battery-management MCU over a 4-wire bus, reducing wiring harness complexity versus parallel ADCs.
Được đề xuất
Automotive Sensor Signal Conditioning Modules
Although the TLC1541IFNG3 is not AEC-Q100 qualified, it appears in non-safety automotive subsystems such as HVAC control modules, body controllers, and infotainment analog inputs where industrial-grade -40C to +85C operation suffices. The 10-bit resolution and 11-channel input support multiple sensor types (temperature, position, pressure) feeding a body-control MCU over SPI. Designers requiring AEC-Q100 grade 1 should evaluate TI's automotive-qualified SAR ADC family instead.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TLC1541IFNG3 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TLC1541IFNR | TLC1541CFNG3 | TLC1541CFNR | TLC1541CDWRG4 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 20-PLCC (FN) 9x9 mm | 20-PLCC (FN) 9x9 mm - same | 20-PLCC (FN) 9x9 mm - same | 20-PLCC (FN) 9x9 mm - same | 20-SOIC (DW) wide-body - different footprint |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Sampling Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS |
| Analog Input Channels | 11 (10 ext + 1 self-test) | 11 | 11 | 11 | 11 |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C |
| Packaging Form | Tube | Tape and Reel | Tube | Tape and Reel | Tape and Reel (different package) |
| RoHS / Pb-Free | Yes (G3 suffix) | Yes | Yes | Yes | Yes |
| Pin-to-Pin Compatibility | Reference (TLC1541FN PLCC-20 base) | Identical - same PLCC-20 footprint | Identical - same PLCC-20 footprint | Identical - same PLCC-20 footprint | Different package (SOIC-20), pinout may differ - verify before swap |
Bảo phân biệt quan trọng
- Industrial temperature grade in standard PLCC-20 package (vsTLC1541CFNG3)
- Tube packaging for prototyping and low-volume builds (vsTLC1541IFNR)
- On-chip self-test channel for built-in diagnostics (vsTLC2543 (12-bit successor))
- Wide industrial supply tolerance + bipolar input mode (vsTLC1541CDWRG4 (SOIC package variant))
Ghi chú thiết kế
Decouple both the analog +5 V supply (AVCC) and digital +5 V supply (DVCC) close to the IC with a 10 µF tantalum or ceramic bulk capacitor in parallel with a 0.1 µF ceramic high-frequency bypass. AGND and DGND should be tied at a single point under the IC (star-ground topology) to prevent digital switching noise from coupling into the analog sample-and-hold front-end. Estimated: at 32 kSPS conversion rate, each conversion draws transient current on AVCC, so a low-ESR bulk cap is mandatory.
Route analog input traces (AIN0-AIN10) as short, guarded differential pairs or directly over a continuous analog ground plane to minimize capacitive pickup from digital lines. Keep the serial interface traces (CS, I/O CLOCK, ADDRESS, EOC, DOUT) routed together and away from analog inputs; place a ground guard trace between the two groups on the PCB. The PLCC-20 (FN) package has J-leads that wrap under the body - leave clearance under the part for socket footprints if field replacement is needed.
Source impedance above 1 kΩ on analog input channels degrades linearity because the SAR input draws transient charge during the sample phase - add an external input buffer op-amp or keep source impedance below 600 Ω for full 10-bit accuracy. Do not exceed the absolute maximum analog input voltage (±15 V over-voltage, but continuous 0-5.5 V at 5 V supply) - higher voltages without external protection can damage the input multiplexer. The serial protocol is NOT a standard SPI - the host must drive CS manually and respect the EOC handshake.
The DOUT pin is a 3-state output that releases the bus when CS is high - ensure the host serial peripheral does not enable its pull-up or pull-down on the idle DOUT line, as this can cause bus contention with another device sharing the SPI bus. The I/O CLOCK input must remain stable for at least 50 ns after CS rising edge to allow the internal state machine to latch the address - use a short CS pulse and clock bursts for fastest scan rates.
The 20-PLCC (FN) package has a typical thermal resistance θJA of approximately 60-70 °C/W (per TI package datasheet). At maximum supply current of about 5 mA and 5 V supply, dissipation is 25 mW, giving a junction temperature rise of only 1.5 °C above ambient - thermal management is not a concern for this part. The industrial -40 °C to +85 °C operating range is bounded by silicon limits, not package thermal limits.
Thông tin tuân thủ
RoHS compliant per TI product page (G3 suffix denotes Pb-free green release). REACH compliant per TI material declaration. Not AEC-Q100 qualified - this part targets industrial, not automotive safety-critical designs. Conflict-minerals declaration available on TI.com.
