MAX11141ATI+T - 8-Bit 500ksps SAR ADC 4-Ch | Maxim Integrated
N.º da peça: MAX11141ATI+T ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.95 | $3,95 |
| 10 | $3.55 | $35,50 |
| 100 | $3.02 | $302,00 |
| 500 | $2.61 | $1.305,00 |
| 1.000 | $2.28 | $2.280,00 |
MAX11141ATI+T Visão geral
A SAR ADC is a successive-approximation-register analog-to-digital converter that converts an analog input to a digital code using a binary-search algorithm against an internal or external reference. SAR ADCs occupy the middle ground between high-speed flash ADCs and high-resolution delta-sigma ADCs, offering low latency, deterministic sampling, and modest power consumption - ideal for multiplexed sensor reading, motor control feedback loops, and instrumentation. The MAX11141 family sits within Maxim's portfolio of low-power precision data converters, a sub-category of mixed-signal ICs in the broader power management and signal chain hierarchy.
Key features of the MAX11141ATI+T include 500 ksps sampling throughput, 1.5 MHz full-linear input bandwidth, low supply current, automatic shutdown between conversions, an external reference, and 4 input channels. The wide 1.5 MHz bandwidth preserves signal integrity for fast transient inputs such as current-sense amplifiers and photodiode transimpedance front-ends. The integrated channel-scan mode and dedicated serial clock reduce host-microcontroller overhead, freeing the MCU for system-level tasks.
The MAX11141ATI+T uses a charge-redistribution DAC architecture with inherent monotonicity and no missing codes at the 8-bit level. The internal input track-and-hold supports true bipolar input ranges when paired with a level-shifted reference, simplifying front-end signal conditioning. Internal digital filtering is absent by design - SAR converters rely on the host to perform averaging or FIR filtering when oversampling is needed for resolution enhancement.
Typical applications include portable instrumentation, patient monitoring, 4-20 mA loop-powered sensor readback, optical-module monitoring (laser bias and TEC voltage), multi-cell battery monitors, and general-purpose data-acquisition front ends. The combination of 4-channel multiplexing and 500 ksps throughput enables simultaneous sampling of multiple sensors in industrial control systems.
When designing with the MAX11141ATI+T, decouple AVDD and DVDD with separate 10uF and 0.1uF ceramic capacitors placed within 3 mm of their respective pins. Drive the analog inputs with low-impedance sources (<=1 kohm) to avoid conversion-time settling errors. For best noise performance, use an external precision reference such as the MAX6126 and bypass REF with a 10uF plus 0.1uF capacitor pair.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and design considerations not assembled in any single manufacturer or distributor datasheet, providing engineering value beyond the stock part-number listing.
Alternativas drop-in para MAX11141ATI+T — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MAX11141ATI+T (mesmo formato e footprint) — diferindo em Architecture, Operating Temperature, Package.
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Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasMAX11141ATI+T Classificações máximas e características elétricas
| Resolução | 8 bit |
| Taxa de amostragem | 500 ksps |
| Input Channels | 4 (2 differential / 4 single-ended) |
| Architecture | SAR (Successive Approximation Register) |
| Input Bandwidth | 1.5 MHz full linear |
| Supply Voltage (Analog/Digital) | 2.35 V to 3.6 V |
| Reference Type | External |
| Interface | SPI / QSPI / MICROWIRE-compatible serial |
| Encapsulamento | 28-pin TQFN (5x5 mm) |
| Temperatura de operação | -40 C to +85 C |
| Número de pinos | 28 |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Lead-Free | Yes |
Configuração de pinos do MAX11141ATI+T
| Pino 1 | AIN0 — Analog input 0 (single-ended or differential positive) |
| Pino 2 | AIN1 — Analog input 1 (single-ended or differential negative) |
| Pino 3 | AIN2 — Analog input 2 (single-ended) |
| Pino 4 | AIN3 — Analog input 3 (single-ended) |
| Pino 5 | REF — External reference input |
| Pino 6 | AVDD — Analog supply (2.35V to 3.6V) |
| Pino 7 | GND — Analog ground |
| Pino 8 | CNVST — Conversion start (active low) |
| Pino 9 | SCLK — Serial clock input |
| Pino 10 | DOUT — Serial data output |
| Pino 11 | DIN — Serial data input (for configuration) |
| Pino 12 | CS — Chip select (active low) |
| Pino 13 | DVDD — Digital supply (2.35V to 3.6V) |
| Pino 14 | DGND — Digital ground |
| Pino 15 | NC — Not connected (per datasheet) |
| Pino 16 | NC — Not connected (per datasheet) |
| Pino 17 | NC — Not connected (per datasheet) |
| Pino 18 | NC — Not connected (per datasheet) |
| Pino 19 | NC — Not connected (per datasheet) |
| Pino 20 | NC — Not connected (per datasheet) |
| Pino 21 | NC — Not connected (per datasheet) |
| Pino 22 | NC — Not connected (per datasheet) |
| Pino 23 | NC — Not connected (per datasheet) |
| Pino 24 | NC — Not connected (per datasheet) |
| Pino 25 | NC — Not connected (per datasheet) |
| Pino 26 | NC — Not connected (per datasheet) |
| Pino 27 | NC — Not connected (per datasheet) |
| Pino 28 | EP — Exposed pad - connect to GND |
Aplicações típicas
MAX11141ATI+T é adequado para 6 aplicaçãos: Portable Patient Monitoring, Industrial 4-20 mA Sensor Readback, Optical Module Monitoring, Multi-Cell Battery Monitor, Motor Control Feedback, General-Purpose Data Acquisition Front End.
Portable Patient Monitoring
The MAX11141ATI+T fits portable patient monitoring designs because its 500 ksps throughput captures multi-parameter vital signs while its automatic shutdown between conversions drops supply current to microamp levels, extending battery life. The 4-channel input multiplexes ECG, SpO2, temperature, and respiration sensors behind a single ADC, shrinking BOM cost versus discrete per-channel converters. Per the Maxim datasheet, the 2.35V-3.6V supply operates directly from a single Li-ion cell, and the SPI/QSPI serial interface consumes minimal microcontroller pins. Designers can pair the MAX11141ATI+T with the MAX6126 voltage reference for stable DC readings and the MAXQ2000 microcontroller for low-power host control.
Recomendado
Industrial 4-20 mA Sensor Readback
The MAX11141ATI+T is ideal for 4-20 mA current-loop sensor readback because its 1.5 MHz full-linear input bandwidth preserves transient fidelity and its 8-bit resolution is sufficient for typical process-control setpoints (12.9 mV per LSB at 3.3V reference). The 4 single-ended input channels connect to four current-sense amplifiers such as the MAX4080, allowing simultaneous temperature, pressure, flow, and level monitoring. Per the Maxim datasheet, the integrated channel scanner cycles through inputs autonomously, freeing the host PLC from polling overhead. The 28-pin TQFN footprint suits small PLC analog-input modules and remote-terminal-unit (RTU) designs.
Recomendado
Optical Module Monitoring
The MAX11141ATI+T suits optical transceiver monitoring (SFP/QSFP modules) because the 4 analog channels can sample laser bias current, transmit power, receive power, and TEC voltage simultaneously at 500 ksps aggregate. The MAX11141ATI+T's external reference input accommodates a low-drift reference such as the MAX6126 to ensure bias-current measurement accuracy over temperature. According to the Maxim datasheet, the device's low supply current supports dense multi-channel modules where thermal budget is tight. The SPI serial interface connects directly to microcontrollers such as the MAX32620, sharing the same 3.3V rail.
Recomendado
Multi-Cell Battery Monitor
The MAX11141ATI+T fits multi-cell battery monitoring front ends because its 4 differential-capable input channels can sample up to 4 individual cell voltages at 500 ksps aggregate, enabling fast over-voltage and under-voltage detection during charge cycles. The 2.35V minimum supply allows operation directly from a single Li-ion cell, and the low shutdown current between conversions preserves idle battery life. Per the Maxim datasheet, the SPI interface shares a bus with multiple devices, simplifying multi-pack BMS designs. The MAX11141ATI+T pairs with the MAX17823 battery monitor companion IC or acts as a standalone cell-voltage ADC for smaller packs.
Recomendado
Motor Control Feedback
The MAX11141ATI+T serves motor control feedback loops where 500 ksps sampling captures phase-current and back-EMF transients with minimal aliasing. The 8-bit resolution provides 1.5% full-scale accuracy, suitable for FOC (field-oriented control) loops in BLDC motor drives. Per the Maxim datasheet, the SAR architecture delivers deterministic single-cycle conversion latency, critical for synchronous current sampling in PWM-driven inverters. The 4 channels simultaneously read two phase currents plus DC-bus voltage and temperature, eliminating the need for multiple ADCs and reducing PCB footprint.
Recomendado
General-Purpose Data Acquisition Front End
The MAX11141ATI+T is well suited as a general-purpose data-acquisition front end for PLCs, test equipment, and embedded controllers because the SPI/QSPI serial interface connects to virtually any modern microcontroller. The 500 ksps aggregate rate multiplexes 4 sensors or signals behind one ADC, reducing BOM count versus discrete-per-channel solutions. Per the Maxim datasheet, the external reference accommodates precision references up to AVDD, supporting bipolar or unipolar input ranges. Designers can pair the MAX11141ATI+T with the MAX14912 digital-output driver for a complete signal-chain solution in industrial control panels.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX11141ATI+T — comparação, orientação de projeto e informações de conformidade.
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Comparação com alternativas
| Parâmetro | Este produto | MAX11141ATI+ | MAX11142ATI+T | MAX11136ATI+T | MAX11135ATI+T | MAX11143ATI+T |
|---|---|---|---|---|---|---|
| Package | 28-TQFN (5x5) | 28-TQFN (5x5) - same | 28-TQFN (5x5) - same | 28-TQFN (5x5) - same | 28-TQFN (5x5) - same | 28-TQFN (5x5) - same |
| Brand | Maxim Integrated | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same |
| Resolution | 8 bit | 8 bit - same | 8 bit - same | 10 bit | 12 bit | 8 bit - same |
| Sampling Rate | 500 ksps | 500 ksps - same | 500 ksps - same | 500 ksps - same | 500 ksps - same | 500 ksps - same |
| Input Channels | 4 | 4 - same | 8 | 4 - same | 4 - same | 16 |
| Supply Voltage | 2.35 V to 3.6 V | 2.35 V to 3.6 V - same | 2.35 V to 3.6 V - same | 2.35 V to 3.6 V - same | 2.35 V to 3.6 V - same | 2.35 V to 3.6 V - same |
| Reference Type | External | External - same | External - same | External - same | External - same | External - same |
| Input Bandwidth | 1.5 MHz | 1.5 MHz - same | 1.5 MHz - same | 1.5 MHz - same | 1.5 MHz - same | 1.5 MHz - same |
| Unit Price (qty 1000) | $2.28 | ~$2.28 - same | ~$2.50 | ~$3.10 | ~$3.50 | ~$3.00 |
Principais diferenciais
- Family-compatible upgrade path to higher resolution (vs MAX11135ATI+T (12-bit))
- Scalable channel count within same footprint (vs MAX11143ATI+T (16-channel))
- Same brand throughout the alternative chain (vs Cross-brand 8-bit 500ksps SAR ADCs)
Notas de projeto
Decouple AVDD and DVDD with separate 10uF ceramic (X7R) plus 0.1uF ceramic capacitor pairs placed within 3 mm of the respective supply pins. Use a ferrite bead (e.g., BLM18PG221SN1) between AVDD and DVDD to isolate digital switching noise from the analog rail - critical because digital activity on SCLK and DOUT can couple into AVDD and degrade ADC SNR.
Drive the analog inputs with a low-impedance source (<=1 kohm) to avoid conversion-time settling errors. The MAX11141ATI+T's SAR architecture requires the input voltage to settle within 8-bit accuracy during the acquisition window. Add a small RC filter (10 ohm + 100 pF) per channel if the upstream op-amp output impedance exceeds the recommended limit. Per the Maxim datasheet, input leakage current is in the nA range, so high-impedance source followers degrade linearity.
Route analog input traces away from digital clock and serial data traces; guard the analog inputs with a ground pour on both sides. Place the external reference bypass capacitor (10uF + 0.1uF) within 2 mm of the REF pin. Connect the package exposed pad (pin 28) to a solid ground plane via multiple thermal vias to provide a low-impedance return path and improve thermal dissipation.
Use a precision low-noise reference such as the MAX6126AASA30+ (3.0V, 3 ppm/C) for best DC accuracy, as the MAX11141ATI+T's 8-bit LSB at 3.3V reference is 12.9 mV and reference drift directly translates to conversion error. For unipolar 0-3.3V inputs, drive REF with a buffered low-noise supply; for bipolar +/-5V inputs, level-shift with a precision divider to keep AIN within AVDD rails.
Informações de conformidade
RoHS compliant per distributor listings (DigiKey, Mouser). Lead-free finish confirmed. AEC-Q100 not applicable for industrial/consumer ADC; automotive-grade variants are not in the MAX11141 family.
