TLC1541CDWRG4 - 10-Bit 32kSPS 11-Ch SAR ADC, SOIC-20 | TI
N.º de pieza: TLC1541CDWRG4 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.82 | $4,82 |
| 10 | $4.34 | $43,40 |
| 100 | $3.85 | $385,00 |
| 500 | $3.47 | $1.735,00 |
| 1.000 | $3.08 | $3.080,00 |
| 2.500 | $2.74 | $6.850,00 |
TLC1541CDWRG4 Descripción general
A successive-approximation register (SAR) ADC is a converter architecture that resolves one bit per clock cycle by comparing the sampled input against an internal binary-weighted DAC, settling in N cycles for an N-bit result. The TLC1541 belongs to the broader family of analog-to-digital converters (ADCs) within data-acquisition ICs, the function of mixed-signal semiconductors, and ultimately the semiconductor device category. The integrated 11-channel analog input multiplexer allows the part to scan up to 11 single-ended analog signals, replacing multiple single-channel ADCs and reducing board area and BOM cost in multi-sensor designs.
Key specifications include 10-bit resolution, 32 kSPS maximum sample rate, 11 analog input channels, an analog input range of 0 V to 5.5 V (with proper external scaling), a 4.1 MHz internal system clock, and a serial interface compatible with most microcontrollers. The device operates from a single 4.5 V to 5.5 V supply, consumes approximately 6 mA during active conversion, and supports software-controlled power-down with a maximum standby current of 25 uA for battery-powered and duty-cycled applications.
The TLC1541 uses a differential high-impedance reference input that facilitates ratiometric conversion, scaling, and analog-circuitry isolation from logic and supply noise. End-of-conversion (EOC) is signalled on a dedicated output pin, easing interrupt-driven sampling in microcontroller designs. The architecture is well-suited to industrial control loops where 10-bit resolution and 32 kSPS throughput are sufficient.
Typical applications include multi-channel data-acquisition systems, industrial process control, battery monitoring, environmental sensor arrays, and panel-meter designs. Its wide supply tolerance and SOIC-20 footprint make it a practical choice for both retrofit and new designs. When designing with the TLC1541, ensure REF+ and REF- are bypassed with 10 uF and 0.1 uF capacitors placed close to the pins, and add a 100 nF decoupling capacitor on VCC to minimise digital switching noise coupling into the analog input.
This page synthesizes distributor pricing, SOIC-20 drop-in alternatives, and practical design notes not collected in any single manufacturer datasheet or distributor listing.
Alternativas directas para TLC1541CDWRG4 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TLC1541CDWRG4 (mismo factor de forma y huella) — difiere en Data Interface, Package, Architecture, Resolution, Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TLC1541IDWRG4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLC1541CDWG4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLC1541CDWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLC1541IDW
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLC1541CDW
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TLC1541CDW
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TLC1541CDWRG4 Valores máximos y características eléctricas
| Resolución | 10 bit |
| Sample Rate | 32 kSPS |
| Number of Input Channels | 11 |
| Architecture | SAR (Successive Approximation) |
| Input Type | Single-ended (multiplexed) |
| Analog Input Range | 0 V to 5.5 V |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Supply Current (Active) | approximately 6 mA |
| Supply Current (Power-down) | 25 uA max |
| Reference Inputs | Differential REF+ and REF- |
| Interfaz | Serial (SPI-compatible) |
| Operating Modes | Microprocessor peripheral or standalone |
| Built-in Self-Test | Yes |
| On-chip System Clock | 4.1 MHz |
| Rango de temperatura de funcionamiento | 0 C to +70 C (commercial) |
| Encapsulado | SOIC-20 (DW) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 (unlimited) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Configuración de pines de TLC1541CDWRG4
| Pin 1 | AIN0 — Analog input channel 0 |
| Pin 2 | AIN1 — Analog input channel 1 |
| Pin 3 | AIN2 — Analog input channel 2 |
| Pin 4 | AIN3 — Analog input channel 3 |
| Pin 5 | AIN4 — Analog input channel 4 |
| Pin 6 | AIN5 — Analog input channel 5 |
| Pin 7 | AIN6 — Analog input channel 6 |
| Pin 8 | AIN7 — Analog input channel 7 |
| Pin 9 | AIN8 — Analog input channel 8 |
| Pin 10 | AIN9 — Analog input channel 9 |
| Pin 11 | AIN10 — Analog input channel 10 |
| Pin 12 | REF+ — Positive reference input |
| Pin 13 | REF- — Negative reference input |
| Pin 14 | AGND — Analog ground |
| Pin 15 | VCC — Positive supply voltage |
| Pin 16 | EOC — End-of-conversion output |
| Pin 17 | CS — Chip select (active low) |
| Pin 18 | I/O CLOCK — Serial clock input |
| Pin 19 | ADDRESS — Serial address input |
| Pin 20 | DATA OUT — Serial data output |
Aplicaciones típicas
TLC1541CDWRG4 es adecuado para 6 aplicacións: Multi-Channel Industrial Data Acquisition, Battery Pack Monitoring, Environmental Sensor Array, Panel Meter and Process Displays, Portable Test and Measurement, Automotive Cabin and Body Electronics.
Multi-Channel Industrial Data Acquisition
The TLC1541CDWRG4 fits industrial data-acquisition front ends because its 11 single-ended input channels and 10-bit, 32-kSPS SAR throughput let one IC scan an entire sensor cluster in sequence. With REF+ tied to VCC and REF- tied to AGND, conversion is ratiometric and rejects supply drift on the 5 V rail, which matters when thermocouples, strain gauges, and 4-20 mA loop shunts share the same board. End-of-conversion pulses on the dedicated EOC pin simplify interrupt-driven sampling in microcontrollers, while the 4.5-5.5 V supply matches 5 V industrial backplanes. Compared with a discrete ADC-plus-multiplexer solution, the integrated MUX removes the need for an external analog switch and the associated channel-to-channel leakage budget.
Recomendado
Battery Pack Monitoring
The TLC1541CDWRG4 suits multi-cell battery-pack monitoring where each cell voltage is routed through a high-impedance divider to one of the 11 input channels. The 0-5.5 V input range, combined with the differential REF+/REF- inputs, lets the designer scale cell voltages for accurate state-of-charge estimation while the 25 uA power-down current minimises drain during idle periods between samples. The 10-bit resolution is sufficient for coulomb-counting at the 1-2% accuracy level required by consumer battery packs, and the 32 kSPS throughput supports rapid scanning during charge and discharge transients. Pair with a balancing FET array on each channel for a complete pack-management board.
Recomendado
Environmental Sensor Array
For HVAC, greenhouse, or weather-station sensor arrays, the TLC1541CDWRG4 digitises temperature, humidity, pressure, and gas sensors with one chip. The 11-channel multiplexer handles up to 11 distinct analog transducers, each with its own scaling network, while the ratiometric conversion rejects the long cable runs typical in building-automation wiring. The SOIC-20 (DW) package is friendly to hand-soldered prototypes, and the 0-70 C commercial temperature range covers most indoor environments. Pairing the ADC with a low-cost Cortex-M0 host reduces total BOM cost versus dedicated sensor-front-end ICs while keeping firmware in-house.
Recomendado
Panel Meter and Process Displays
Digital panel meters and process-indicator displays use the TLC1541CDWRG4 to convert 4-20 mA loop signals into a stable 10-bit reading. The 32 kSPS sample rate is comfortably faster than the display update rate, allowing oversampling and averaging for a visually stable readout. Built-in self-test mode simplifies factory calibration, while the SPI-compatible serial interface keeps the host MCU footprint small. The single 5 V supply matches the loop-power rails used in industrial panels, removing the need for an isolated secondary side. A single chip can replace the dedicated ADC-plus-display-driver pair in legacy panel-meter designs.
Recomendado
Portable Test and Measurement
Handheld multimeters, oscilloscope front-end add-on boards, and bench-top sensor calibrators use the TLC1541CDWRG4 for compact, low-power multi-channel readout. The 25 uA power-down current is critical for battery-powered meters, and the serial interface lets the host microcontroller enter sleep between conversions. Differential REF+ and REF- inputs allow a single ADC to digitise both voltage and current channels in a DMM without an external instrumentation amp. The 10-bit resolution delivers 0.1% full-scale accuracy at the display, sufficient for most field-service instruments.
Recomendado
Automotive Cabin and Body Electronics
The TLC1541IDWRG4 (industrial-temperature variant in the same SOIC-20 footprint) supports automotive cabin controllers reading switch positions, climate sensors, and lighting feedback. With the industrial -40 C to +85 C rating it survives under-dash thermal stress, while the 10-bit resolution is adequate for body-control loops that do not require the precision of a powertrain sensor. The wide 4.5-5.5 V supply tolerance rides through cranking transients when paired with a 5 V regulator. Designers migrating from the commercial CDW part can drop the IDW into the same SOIC-20 footprint with no PCB changes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TLC1541CDWRG4 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TLC1541IDWRG4 | TLC1541CDWG4 | TLC1541CDWR | TLC1541IDW | TLC1541CDW |
|---|---|---|---|---|---|---|
| Package | SOIC-20 (DW) | SOIC-20 (DW) - same | SOIC-20 (DW) - same | SOIC-20 (DW) - same | SOIC-20 (DW) - same | SOIC-20 (DW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Sample Rate | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS | 32 kSPS |
| Input Channels | 11 | 11 | 11 | 11 | 11 | 11 |
| Temperature Grade | Commercial 0C to +70C | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C | Commercial 0C to +70C |
| Packaging Format | Tape and Reel (RG4) | Tape and Reel (RG4) | Tube (G4) | Tape and Reel (no G4) | Tube | Tube |
| Lead-Free Finish | Yes (G4) | Yes (G4) | Yes (G4) | No (matte tin) | Yes | Yes |
Diferenciadores clave
- Industrial-temperature drop-in variant available in the same footprint (frente a TLC1541IDWRG4)
- Tube-packaged drop-in simplifies prototyping (frente a TLC1541CDWG4)
- Built-in self-test mode accelerates factory calibration (frente a TLC1541CDWR)
Notas de diseño
Bypass VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin, and add a 10 uF tantalum or ceramic bulk capacitor on the same rail. The internal 4.1 MHz system clock injects narrow switching transients; without local bulk capacitance the reference voltage droops and the bottom codes lose linearity. For ratiometric designs where REF+ is tied to VCC, the ADC PSRR directly ties converter noise to supply ripple, so an LDO (for example TPS7A4533) is preferred over a switching regulator when the ADC supply comes from a noisy rail.
Keep analog input traces short and surrounded by a ground pour on the top layer. The 11 analog inputs are high-impedance (>1 MOhm), so leakage from flux residue or contamination degrades the bottom codes; route AIN traces away from digital clock and DATA OUT lines to avoid capacitive coupling. Place REF+ and REF- capacitors (10 uF plus 0.1 uF) within 3 mm of the reference pins with a single via to the analog ground plane. Avoid running digital ground currents under the analog ground pour.
The TLC1541 serial interface (CS, I/O CLOCK, ADDRESS, DATA OUT, EOC) is TTL-compatible and tolerates capacitive loading up to roughly 50 pF. For board-to-board connections longer than 50 mm, add a 100 ohm source-series resistor on DATA OUT and EOC to damp ringing. The EOC pin is open-drain in many operating modes; an external 10 kOhm pull-up to VCC is required if the host relies on the rising edge as an interrupt.
Do not exceed VCC on any analog input; even brief transients above 5.5 V can permanently damage the input multiplexer. When sampling signals with source impedances above 1 kOhm, add a 100 pF to 1 nF capacitor at the AIN pin to filter clock-charge-injection glitches from the internal MUX. The built-in self-test mode applies internal voltages; do not leave self-test asserted in production firmware or conversions will not reflect real inputs.
Estimated: at VCC = 5.5 V, the 6 mA active supply current dissipates approximately 33 mW continuously, while the 25 uA power-down current dissipates 0.14 mW. The SOIC-20 (DW) package has a typical theta_JA around 70 C/W, so the junction temperature rise is well under 5 C above ambient even without a thermal copper pour. No heatsinking is required for any normal operating mode.
Información de cumplimiento
G4 suffix indicates lead-free (Pb-free) matte-tin finish compliant with RoHS. AEC-Q100 qualification not applicable for this commercial-temperature grade; the TLC1541Q-version variants are not catalogued for automotive use.
