TLC3544IPWRG4 - 14-bit 200kSPS 4-Ch Serial ADC | Texas Instruments
Артикул: TLC3544IPWRG4 ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.25 | $112,50 |
| 100 | $9.95 | $995,00 |
| 500 | $8.75 | $4.375,00 |
| 1.000 | $7.95 | $7.950,00 |
TLC3544IPWRG4 Обзор
An SAR (Successive Approximation Register) ADC is a precision data converter that performs a binary search through internal capacitor arrays to resolve an analog input to N bits in a single conversion cycle. SAR ADCs are widely favored for their deterministic latency, lack of pipeline delay, and excellent DC accuracy at moderate speeds, making them a standard choice for multiplexed-channel data acquisition, industrial process control, and instrumentation front-ends. The TLC3544 sits within the data converter hierarchy as: SAR ADC -> ADC -> data converter -> signal chain IC -> semiconductor.
Key differentiating features include 14-bit resolution with no missing codes, four analog input channels multiplexed through an internal analog MUX, 200-kSPS maximum throughput, pseudodifferential input configuration spanning 0 V to the reference voltage, and a 5-V analog/3- to 5-V digital split supply architecture that simplifies mixed-signal PCB partitioning. The serial interface is a SPI/QSPI/MICROWIRE-compatible four-wire port that minimizes pin count and board routing in dense designs.
The TLC3544 architecture combines a low-noise input sample-and-hold, a high-accuracy DAC for the SAR conversion loop, and a precision internal reference chain that scales with VREF. The device achieves strong AC performance with excellent differential non-linearity and low integral non-linearity for a 14-bit part, while typical power dissipation remains below the threshold for forced-air cooling in most embedded systems.
Typical applications include multi-channel industrial data acquisition modules, factory automation sensor interfaces, portable or battery-powered measurement equipment, optical module monitoring, and process control I/O cards. The 4-channel input count matches common transducer clusters (e.g., four thermocouples, four strain gauges, four 4-20 mA loops) with a single ADC chip.
Designers should plan decoupling on both AVDD and DVDD with 0.1 µF ceramic capacitors placed within 5 mm of the supply pins, keep analog and digital ground returns separated back at a single star point, and use a low-noise, low-drift external reference (e.g., REF3025 or REF5050) when system DC accuracy requires more than the internal reference can deliver.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Аналоги без доработки для TLC3544IPWRG4 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с TLC3544IPWRG4 (тот же форм-фактор и посадочное место) — отличается по Analog Input Range, Number of Channels, Package, Resolution.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
TLC3548IPWRG4
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TLC3544IPWG4
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TLC3544IPWR
✅ Прямая замена✓ В наличии
$4.85 / шт.
Открыть даташит →TLC3544IPWRG4 Максимальные параметры и электрические характеристики
| Разрешение | 14 bits |
| Number of Channels | 4 (input), 2 (MUX diff inputs) |
| Sampling Rate (Max) | 200 kSPS |
| Conversion Time (Max) | 2.785 µs |
| Architecture | SAR (Successive Approximation Register) |
| Analog Supply Voltage | 5 V (single supply) |
| Digital Supply Voltage | 3 V to 5 V |
| Analog Input Range | 0 V to VREF (pseudodifferential) |
| Input Configuration | Pseudodifferential, single-ended mux |
| Тип интерфейса | Serial (SPI/QSPI/MICROWIRE compatible) |
| Диапазон рабочих температур | -40 °C to +85 °C |
| Корпус | 20-pin TSSOP (PW) |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
| Lead-Free | Yes |
| Resolution Category | 14-bit |
| Polarity | Unipolar |
Конфигурация выводов TLC3544IPWRG4
| Контакт 1 | AVDD — Analog supply voltage (5 V) |
| Контакт 2 | AGND — Analog ground |
| Контакт 3 | AIN0 — Analog input channel 0 |
| Контакт 4 | AIN1 — Analog input channel 1 |
| Контакт 5 | AIN2 — Analog input channel 2 |
| Контакт 6 | AIN3 — Analog input channel 3 |
| Контакт 7 | VREF — External reference voltage input |
| Контакт 8 | REFM — Reference ground (return for VREF) |
| Контакт 9 | NC — Not connected (per datasheet) |
| Контакт 10 | DGND — Digital ground |
| Контакт 11 | DVDD — Digital supply voltage (3 V to 5 V) |
| Контакт 12 | CS — Chip select (active low) |
| Контакт 13 | SCLK — Serial clock input |
| Контакт 14 | DOUT — Serial data output |
| Контакт 15 | DIN — Serial data input (FS frame sync) |
| Контакт 16 | EOC — End-of-conversion output flag |
| Контакт 17 | PD — Power-down input (active low) |
| Контакт 18 | TAG — Channel tag/identification input |
| Контакт 19 | AGND — Analog ground |
| Контакт 20 | AVDD — Analog supply voltage (5 V) |
Типичное применение
TLC3544IPWRG4 подходит для 7 применениеs: Multi-Channel Industrial Data Acquisition Module, Portable Battery-Powered Measurement Instrument, Optical Module Monitoring (SFP/QSFP Transceivers), Process Control I/O Card (PLC Analog Input Module), Multi-Channel Sensor Interface Board (IoT Edge Nodes), Automated Test Equipment (ATE) Multi-Site Test Fixture, Power-Monitor and Battery-Management Peripheral Board.
Multi-Channel Industrial Data Acquisition Module
The TLC3544IPWRG4 fits industrial DAQ modules because its 4 multiplexed analog inputs accept the typical transducer cluster (thermocouples, RTDs, 4-20 mA loops) with a single ADC chip, while its pseudodifferential 0-V to VREF input topology rejects ground-loop noise common on factory floors. Operating across -40 °C to +85 °C, the part tolerates unconditioned cabinet environments where ambient swings exceed commercial-grade limits. With 200 kSPS aggregate throughput and -85 dB typical THD, it resolves 14-bit measurements at rates far faster than typical control loops (1-10 kHz), allowing ample margin for sequential channel scanning. The 4-wire SPI-compatible serial interface reduces microcontroller pin count, freeing GPIO for relays, displays, and digital I/O - critical for compact DIN-rail modules where board area is constrained. Reference it with a REF5050AIDR 5-V reference when absolute accuracy matters, or REF3025AIDBVR for 0-2.5 V transducer spans.
Рекомендуется
Portable Battery-Powered Measurement Instrument
Battery-powered handheld measurement instruments benefit from the TLC3544IPWRG4's low-power CMOS SAR architecture and split 5-V analog / 3-V digital supply that allows direct LDO or battery connection without level shifters. The 4-channel input is well-matched to multi-parameter meters (voltage, current, temperature, pressure) where one ADC consolidates signal conditioning. At 200 kSPS, the part provides oversampling headroom for averaging to improve effective resolution when signals are low-bandwidth - the 14-bit native resolution can extend to ~16-bit effective ENOB at decimated rates. The serial 4-wire interface keeps the microcontroller's pin count low, leaving more budget for LCD, keypad, and USB interface. For handheld form factors, the 20-TSSOP package occupies only 6.5 mm x 6.4 mm of board area - small enough for sub-100 mm x 60 mm enclosures. Pair with TPS61240DRCR boost converter for 3.6 V Li-ion to 5 V AVDD.
Рекомендуется
Optical Module Monitoring (SFP/QSFP Transceivers)
Inside optical transceiver modules (SFP, QSFP, CFP), the TLC3544IPWRG4 is well-suited for monitoring multiple photodiode currents, laser bias, and module temperature through its 4-channel input - eliminating the need for multiple single-channel ADCs in space-constrained SFP designs. The 14-bit resolution is more than sufficient for transmitter-power monitoring (typically requires 8-12 bits) and bias-current feedback, while the 200-kSPS throughput allows high-speed diagnostics during module bring-up. The -40 °C to +85 °C operating range matches SFP module thermal specifications, and the 5-V analog supply is compatible with the 3.3-V module rail feeding a small LDO. The serial interface connects directly to the module's microcontroller over just four pins, leaving precious GPIO for I2C management interfaces. Use it for TX power, RX power, bias current, and temperature compensation feedback in a single chip.
Рекомендуется
Process Control I/O Card (PLC Analog Input Module)
PLC analog-input modules deploy the TLC3544IPWRG4 because of its 4-channel multiplexed input that maps directly to typical PLC analog-I/O channel counts (4 or 8 channels per card) and its pseudodifferential input topology that rejects ground bounce from 24-V industrial field wiring. The 14-bit resolution and 200-kSPS throughput deliver oversampling headroom for moving-average filtering and 50/60 Hz power-line noise rejection, critical for accurate process variable measurement (pressure, flow, level). Operating from -40 °C to +85 °C, the ADC tolerates unconditioned cabinet temperatures without derating. The serial interface minimizes PLC backplane pin usage; if more channels are needed, up to two TLC3544 chips can share a single SPI bus via distinct chip-select lines, giving 8 channels at the same per-channel BOM cost. Reference with REF5050AIDR for high-accuracy absolute measurements.
Рекомендуется
Multi-Channel Sensor Interface Board (IoT Edge Nodes)
IoT edge nodes and remote sensor interface boards benefit from the TLC3544IPWRG4's 4-channel input that consolidates sensor-array reading (multiple temperature sensors, multiple photodiodes, multi-axis strain gauges) into a single ADC with a single reference. The 200-kSPS throughput allows infrequent high-resolution burst reads at low duty cycle - useful for battery-powered edge nodes that wake, sample, transmit, and sleep. The serial 4-wire interface connects easily to common IoT microcontrollers (STM32, ESP32, MSP430, nRF52) without consuming critical GPIO pins. The pseudodifferential input configuration rejects ground noise in distributed sensor networks where ground potentials differ between sensor and node. The 14-bit resolution is well-matched to typical sensor output spans (thermocouples at ~10 µV/°C need 14+ bits for 0.1 °C resolution over a 100 °C range when amplified first).
Рекомендуется
Automated Test Equipment (ATE) Multi-Site Test Fixture
Inside ATE multi-site test fixtures, the TLC3544IPWRG4 multiplexes several DUT analog monitor nodes (supply current, internal node voltages, temperature-sensor outputs) for instrumentation, while its 14-bit resolution and 200-kSPS throughput enable production-grade parametric testing at full handler rates. The serial-interface daisy-chain capability lets one microcontroller control several ADC chips without consuming GPIO budget - essential when a fixture must read 16, 32, or more test points simultaneously. The industrial temperature range supports bare-board testing where local heating from nearby power devices can elevate ambient above commercial limits. The pseudodifferential input is robust against the ground bounce common in handler fixtures with many switching relays and solenoids. For higher density, stack two TLC3544 chips on one SPI bus for 8 channels with independent reference capability.
Рекомендуется
Power-Monitor and Battery-Management Peripheral Board
The TLC3544IPWRG4 suits power-monitor peripherals that read individual cell voltages, shunt currents, and temperature sensors in battery stacks or DC power distribution nodes. The 4-channel input accommodates typical 4-cell monitoring (1 chip per 4 cells) or 4 simultaneous shunt measurements, with expansion by SPI chip-select for larger stacks. Operating from a 5-V analog supply tolerates the elevated voltages near battery stacks when used with external resistor dividers and isolation amplifiers. The pseudodifferential configuration avoids ground-reference errors common in stacked-cell measurements where ground returns differ between cells. The 14-bit resolution provides ~1 mV voltage resolution when input spans are scaled into 0-5 V, sufficient for state-of-charge estimation in lithium battery stacks. Use it for cell balancing feedback, current sensing, and temperature compensation in a single chip.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для TLC3544IPWRG4 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | TLC3548IPWRG4 | TLC3544IPWG4 | TLC3544IPWR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 20-TSSOP (PW) | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same | 20-TSSOP (PW) - same |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits |
| Number of Channels | 4 single-ended / 2 pseudo-differential | 8 single-ended / 4 pseudo-differential | 4 single-ended / 2 pseudo-differential | 4 single-ended / 2 pseudo-differential |
| Max Sample Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Analog Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Digital Supply Voltage | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Interface | SPI/QSPI/MICROWIRE-compatible serial | SPI/QSPI/MICROWIRE-compatible serial | SPI/QSPI/MICROWIRE-compatible serial | SPI/QSPI/MICROWIRE-compatible serial |
| Pin-Compatible Drop-In | — | Yes (extra channels unused) | Yes (reel variant) | Yes (tube variant) |
Ключевые отличия
- True 4-channel multiplexer at 200 kSPS aggregate in single 20-TSSOP (против TLC3544IPWG4 (reel variant))
- Direct pin-for-pin upgrade path to 8-channel TLC3548IPWRG4 (против TLC3544IPWRG4 (this part, 4 channels))
- Pseudodifferential input vs. true differential architecture in 16-bit ADS8860 family (против ADS8860 family (16-bit, 1-MSPS, single-channel SOIC-16))
Заметки по проектированию
Decouple AVDD with a 10 µF tantalum (or 4.7 µF ceramic + 1 µF ceramic) bulk capacitor and a 0.1 µF ceramic placed within 5 mm of the AVDD pin. Place a separate 0.1 µF ceramic on DVDD, with DVDD typically powered from a digital 3.3-V or 5-V rail. Add a ferrite bead between the AVDD source and the AVDD pin if additional rail noise isolation is needed. Star-connect AGND and DGND returns to a single point near the ADC to avoid ground-loop currents from digital switching transients.
Keep analog input traces short and guarded by ground planes on both sides to minimize capacitive pickup and crosstalk. The 4 AIN pins route to the multiplexer in fixed order; if any unused input is left floating, tie it to midscale (VREF/2) through a 10 kΩ resistor to prevent crosstalk from active channels. Place the external reference capacitor (typically 4.7 µF to 10 µF low-ESR ceramic) immediately adjacent to the VREF pin with a short, wide trace - long VREF traces are the leading cause of ADC noise pickup in practice.
Do not operate the ADC with the analog input exceeding AVDD or below AGND (no negative or over-voltage input protection inside the part) - add external clamping diodes or input resistor dividers if the source can exceed the input span. The CS chip-select pin should be driven low before each conversion and held low for the full SCLK burst; spurious SCLK edges from an un-initialized microcontroller can corrupt the conversion register. PD (power-down) requires a deliberate high-to-low transition to enter standby; do not leave it floating. Avoid sharing the same analog and digital ground return at multiple points - this is the most common cause of degraded SNR in 14-bit SAR designs.
Route SCLK, CS, DOUT, and DIN as a controlled-impedance bus (typically 50 Ω to ground) and keep them as a tight bus - avoid splitting the bus between ADC instances. Match trace lengths on SCLK and DOUT within ~5 mm to keep setup/hold timing valid at 200 kSPS burst speeds. Place a small series resistor (33 Ω) on SCLK at the driving MCU pin to dampen reflections when the bus length exceeds ~50 mm. If the controller and ADC live on separate boards, use a digital isolator (ISO1541DR) rather than direct inter-board routing to avoid ground loops coupling digital noise into the analog input.
Информация о соответствии
RoHS compliant and lead-free per DigiKey product listing. Not AEC-Q100 qualified - this is a commercial/industrial-grade ADC. For automotive-qualified ADCs in the 14-bit 200-kSPS class, contact TI for the TPS family equivalents or consult the manufacturer website. Conflict minerals status: per TI published policy, all TI parts are compliant to Section 1502 of the Dodd-Frank Act reporting.
