MAX192ACAP - 10-Bit 8-Ch Serial ADC, Low-Power | Maxim
Артикул: MAX192ACAP ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.2 | $132,00 |
| 100 | $11.45 | $1.145,00 |
| 500 | $9.85 | $4.925,00 |
| 1.000 | $8.4 | $8.400,00 |
MAX192ACAP Обзор
What is a successive-approximation ADC (SAR ADC)? A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm and an internal DAC to step through each bit of the digital output one at a time. SAR ADCs sit in the data-converter hierarchy below sigma-delta and flash converters, combining moderate resolution (8-18 bits typical), low power consumption, and a small footprint. They are the dominant topology for 10-16 bit multi-channel data-acquisition systems that interface to microcontrollers via SPI/MICROWIRE.
Key features of the MAX192 include software-configurable unipolar/bipolar input ranges (0-5 V, 0-10 V, ±5 V, ±10 V), hardware- and software-compatible data format with the MAX186/MAX188 family, single +5 V analog supply operation, and a hardware SHDN pin for power management. Internal +4.096 V reference and 8 single-ended or 4 differential analog input channels simplify BOM.
The MAX192 uses a capacitive-charge redistribution DAC with an inherent track/hold, eliminating the need for an external sample/hold amplifier. The serial interface operates to 4 MHz (max), allowing full-speed conversions to be clocked in ~7.5 µs. The -40°C to +85°C commercial operating temperature range suits industrial and instrumentation environments.
Typical applications include portable data loggers, multi-channel sensor monitoring (4-20 mA loop, thermocouple, RTD), pen-tablet digitizers, battery-powered instrumentation, and process-control front ends. The internal reference and bipolar input ranges also simplify PLC analog input modules.
When designing with this device, place the 10 µF input bypass capacitor as close to VDD as possible and route analog/digital grounds in a star pattern. The internal reference requires a 4.7 µF bypass; insufficient capacitance degrades noise and linearity.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not consolidated in the manufacturer datasheet alone.
Аналоги без доработки для MAX192ACAP — 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 MAX192ACAP (тот же форм-фактор и посадочное место) — отличается по Mounting Type, Operating Temperature, Package, Resolution, RoHS Status.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
MAX192BCAP+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX192AEAP+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX192ACAP+T
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX186AEAP+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX188AEAP+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX189BEPA+
✅ Прямая замена✓ В наличии
$9.15 / шт.
Открыть даташит →MAX192ACAP Максимальные параметры и электрические характеристики
| Разрешение | 10 bit |
| Number of Channels | 8 single-ended / 4 differential |
| Частота дискретизации | 133 ksps |
| Architecture | SAR (Successive Approximation) |
| Input Voltage Range (unipolar) | 0 V to 5 V, 0 V to 10 V |
| Input Voltage Range (bipolar) | ±5 V, ±10 V |
| Напряжение питания | +5 V (analog), +5 V (digital) |
| Supply Current (operating) | 1.5 mA typ at 133 ksps |
| Supply Current (shutdown) | 10 µA typ |
| Internal Reference | +4.096 V |
| Serial Interface | MICROWIRE / QSPI / SPI compatible |
| Корпус | 20-pin SSOP (5.3 mm body) |
| Рабочая температура | 0°C to +70°C (MAX192ACAP grade C) |
| INL | ±1 LSB max (A grade) |
| DNL | ±1 LSB max (A grade) |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов MAX192ACAP
| Контакт 1 | CH0 — Analog input channel 0 |
| Контакт 2 | CH1 — Analog input channel 1 |
| Контакт 3 | CH2 — Analog input channel 2 |
| Контакт 4 | CH3 — Analog input channel 3 |
| Контакт 5 | CH4 — Analog input channel 4 |
| Контакт 6 | CH5 — Analog input channel 5 |
| Контакт 7 | CH6 — Analog input channel 6 |
| Контакт 8 | CH7 — Analog input channel 7 |
| Контакт 9 | COM — Common analog input (for differential conversions) |
| Контакт 10 | AGND — Analog ground |
| Контакт 11 | VDD — +5 V analog supply |
| Контакт 12 | REF — Reference voltage output (internal +4.096 V) / reference input |
| Контакт 13 | REFADJ — Reference adjust (for fine trim) |
| Контакт 14 | SHDN — Shutdown input (active low) |
| Контакт 15 | DOUT — Serial data output |
| Контакт 16 | DIN — Serial data input |
| Контакт 17 | SCLK — Serial clock input |
| Контакт 18 | CS — Chip select (active low) |
| Контакт 19 | DGND — Digital ground |
| Контакт 20 | DVDD — +5 V digital supply |
Типичное применение
MAX192ACAP подходит для 7 применениеs: Multi-Channel Sensor Monitoring, Portable Data Loggers, Process Control PLC Analog Inputs, Battery-Powered Instrumentation, Pen-Tablet / Digitizer Front Ends, Patient Monitoring / Medical Instrumentation, Industrial Control HMI Panels.
Multi-Channel Sensor Monitoring
The MAX192ACAP's 8 single-ended / 4 differential input channels and integrated multiplexer directly support multi-sensor monitoring in industrial data-acquisition systems. Its ±5 V/±10 V bipolar input ranges accept signals from common industrial transducers (4-20 mA loops via sense resistors, ±10 V instrumentation outputs, and 0-10 V process signals) without external signal conditioning, while the +4.096 V internal reference provides a stable conversion scale. The 133 ksps sampling rate is more than adequate for temperature, pressure, and flow sensor multiplexing at typical scan rates below 10 ksps aggregate, and the 1.5 mA operating current keeps power budgets reasonable even with continuous scanning. SPI/MICROWIRE compatibility simplifies connection to most microcontrollers, and 10 µA shutdown current enables battery-powered remote sensor nodes.
Рекомендуется
Portable Data Loggers
Low-power operation (1.5 mA at 133 ksps, 10 µA in shutdown) makes the MAX192ACAP well-suited to battery-powered portable data loggers. The internal +4.096 V reference eliminates a separate reference supply and reduces standby drain, while hardware shutdown (SHDN pin) lets the host microcontroller power-cycle the ADC between acquisitions to extend battery life to months or years on a CR2032 cell. The 20-pin SSOP footprint occupies minimal PCB area, leaving room for an MSP430/PIC host MCU, microSD storage, and a coin-cell battery in compact form factors. Wide input range (0-10 V unipolar or ±10 V bipolar) means the same logger PCB can handle thermocouple-amplified, RTD-scaled, and 4-20 mA signals with only software reconfig.
Рекомендуется
Process Control PLC Analog Inputs
The MAX192ACAP directly interfaces to process-control analog input modules with its software-configurable 0-5 V, 0-10 V, ±5 V, and ±10 V input ranges - covering all common industrial signal levels in a single IC. The 8-channel multiplexer accepts multiple thermocouples, RTDs (via bridge excitation), pressure transducers, and 4-20 mA current loops through scaling resistors. SAR architecture provides no pipeline latency, critical for control loops where deterministic conversion-to-output delay matters. Galvanic isolation between MCU and field wiring is typically added via digital isolators on the SPI lines; the MAX192ACAP's 4 MHz max SCLK supports the high-throughput end of PLC scan rates. The 0°C to +70°C commercial operating range covers most cabinet-internal installations.
Рекомендуется
Battery-Powered Instrumentation
Battery-powered test and measurement instruments benefit from the MAX192ACAP's 1.5 mA operating current and 10 µA hardware-shutdown current. Handheld multimeters, portable oscilloscope probes, and field calibration tools can scan multiple sensor inputs without burdening battery budgets. The integrated +4.096 V reference eliminates a separate reference IC that would otherwise add 1-2 mA quiescent current. Hardware SHDN allows the host to duty-cycle the ADC for ultra-low average power: 1% duty-cycle acquisitions drop average current to ~15 µA. The 20-SSOP footprint and SPI/MICROWIRE interface pair well with low-power MCUs (MSP430, MAX326xx) in compact handheld enclosures.
Рекомендуется
Pen-Tablet / Digitizer Front Ends
The MAX192ACAP's 133 ksps throughput and 8-channel analog input multiplexer make it a candidate digitizer front end for pen-tablet / digitizer products that need multiple pen-position or pressure-sensor inputs. The 10-bit resolution is adequate for basic stylus force and position sensing, and the SAR architecture provides no-latency conversions needed for real-time pen tracking. The integrated +4.096 V reference provides a stable conversion scale across temperature. SPI interface connects directly to embedded pen-controller MCUs. Low power consumption supports wireless / Bluetooth pen-tablet designs where battery life matters.
Рекомендуется
Patient Monitoring / Medical Instrumentation
Although not AEC-Q100 qualified, the MAX192ACAP's medical-grade potential extends to non-life-support patient monitoring devices where the integrated multiplexer simplifies multi-channel electrode / sensor acquisition. Its ±10 V bipolar input range accommodates ECG amplified signals (typically ±5 mV to ±1 V after instrumentation amp) and pressure transducer outputs without external scaling. The internal reference and shutdown mode support portable patient-worn designs. Designers should note that life-support and IEC 60601-1 applications require additional isolation, creepage/clearance, and qualification that this IC alone does not provide - it is suitable only for non-critical monitoring or development/prototyping use.
Рекомендуется
Industrial Control HMI Panels
Human-machine interface (HMI) panels with analog touch / slider / rotary inputs benefit from the MAX192ACAP's 8-channel multiplexer, accepting up to 8 analog control inputs (potentiometers, linear sliders, force-sensitive resistors) on a single ADC. The 133 ksps throughput allows responsive real-time control updates with minimal perceived lag. SPI interface connects to HMI touch-controller ICs. Low power operation and small 20-SSOP footprint suit compact panel designs where PCB real estate is at a premium. Industrial temperature grade variants (MAX192AEAP+) extend operating range to -40°C to +85°C for factory-floor installations.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MAX192ACAP — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MAX192BCAP+ | MAX192AEAP+ | MAX186AEAP+ | MAX188AEAP+ | MAX189BEPA+ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Resolution | 10 bit | 10 bit | 10 bit | 12 bit | 12 bit | 12 bit |
| Number of Channels | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF |
| Internal Reference | +4.096 V | +4.096 V | +4.096 V | +4.096 V | External only | External only |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V | +5 V | +3 V |
| Operating Temperature | 0°C to +70°C (C grade) | 0°C to +70°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Unit Price (qty 100, as of 2026-10-15) | $11.45 | $10.80 | $12.95 | $16.40 | $14.95 | $13.20 |
Ключевые отличия
- Software-configurable bipolar input ranges (против MAX188AEAP+)
- Internal +4.096 V reference integrated (против MAX189BEPA+)
- 8-channel integrated multiplexer (против MAX152CAP+T (single-channel ADC))
- Same SSOP-20 package as 12-bit MAX186 (против MAX186AEAP+)
Заметки по проектированию
Decouple AVDD (pin 11) and DVDD (pin 20) with separate 10 µF tantalum + 0.1 µF ceramic capacitors placed within 5 mm of each pin. Separate analog (AVDD) and digital (DVDD) supplies reduce digital switching noise coupling into analog circuits. For battery-powered designs, use the SHDN pin (active low) to duty-cycle the ADC between acquisitions - shutdown current is only 10 µA, so 1% duty-cycle scanning drops average current to ~15 µA.
Use a star-ground pattern with analog ground (AGND, pin 10) and digital ground (DGND, pin 19) tied together at a single point under the IC. Route the COM pin directly to a low-impedance analog ground plane area - this pin is the return path for single-ended conversions and any ground noise here appears as conversion error. Keep analog input traces short and shielded with ground pours; the high-impedance analog inputs (CH0-CH7, COM) are susceptible to nearby digital switching noise coupling.
Do not omit the 4.7 µF bypass on the REF pin (pin 12) - insufficient capacitance degrades both noise performance and integral linearity. Do not apply signals to any analog input (CH0-CH7, COM) that exceed AVDD + 0.3 V or fall below AGND - 0.3 V; the absolute-max input range is AVDD + 0.3 V, and over-voltage can permanently damage the input ESD structures. Do not exceed 5 MHz SCLK frequency - the SAR internal logic has a maximum clock rate. Configure bipolar input mode by writing the appropriate control bits to the configuration byte at the start of each conversion.
Place a 100 Ω source impedance on each analog input channel by adding a series resistor at the IC pad, combined with an external 100 pF capacitor to ground - this forms an RC anti-aliasing filter (fc ≈ 16 kHz). For high-impedance sources (>10 kΩ), use a Maxim MAX4162 or similar op-amp buffer per channel to drive the ADC's input capacitance without introducing gain error. Note that the MAX192's input sampling capacitor is ~15 pF, so settling time to 10-bit accuracy is <1 µs for source impedances <5 kΩ.
Информация о соответствии
MAX192ACAP+ (lead-free, RoHS-compliant) is the recommended variant for new designs. The legacy MAX192ACAP (no + suffix) is lead-bearing. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Halogen-free status not specified in verified data.
