MAX192ACAP - 10-Bit 8-Ch Serial ADC, Low-Power | Maxim
料号： MAX192ACAP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： MAX192ACAP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX192ACAP （相同外形与封装尺寸） ——差异在于 Mounting Type, Operating Temperature, Package, Resolution, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
MAX192BCAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX192AEAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX192ACAP+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX186AEAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX188AEAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX189BEPA+
✅ 直接替换✓ 有现货
$9.15 / 个
查看数据手册 →MAX192ACAP 最大额定值与电气特性
| 分辨率 | 10 bit |
| Number of Channels | 8 single-ended / 4 differential |
| 采样率 | 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 |
| 电源电压 | +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 |
| 封装 | 20-pin SSOP (5.3 mm body) |
| 工作温度 | 0°C to +70°C (MAX192ACAP grade C) |
| INL | ±1 LSB max (A grade) |
| DNL | ±1 LSB max (A grade) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
MAX192ACAP 引脚配置
| 引脚 1 | CH0 — Analog input channel 0 |
| 引脚 2 | CH1 — Analog input channel 1 |
| 引脚 3 | CH2 — Analog input channel 2 |
| 引脚 4 | CH3 — Analog input channel 3 |
| 引脚 5 | CH4 — Analog input channel 4 |
| 引脚 6 | CH5 — Analog input channel 5 |
| 引脚 7 | CH6 — Analog input channel 6 |
| 引脚 8 | CH7 — Analog input channel 7 |
| 引脚 9 | COM — Common analog input (for differential conversions) |
| 引脚 10 | AGND — Analog ground |
| 引脚 11 | VDD — +5 V analog supply |
| 引脚 12 | REF — Reference voltage output (internal +4.096 V) / reference input |
| 引脚 13 | REFADJ — Reference adjust (for fine trim) |
| 引脚 14 | SHDN — Shutdown input (active low) |
| 引脚 15 | DOUT — Serial data output |
| 引脚 16 | DIN — Serial data input |
| 引脚 17 | SCLK — Serial clock input |
| 引脚 18 | CS — Chip select (active low) |
| 引脚 19 | DGND — Digital ground |
| 引脚 20 | DVDD — +5 V digital supply |
典型应用
MAX192ACAP 适用于 7 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MAX192ACAP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Software-configurable bipolar input ranges （对比 MAX188AEAP+)
- Internal +4.096 V reference integrated （对比 MAX189BEPA+)
- 8-channel integrated multiplexer （对比 MAX152CAP+T (single-channel ADC))
- Same SSOP-20 package as 12-bit MAX186 （对比 MAX186AEAP+)
设计说明
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.
合规信息
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.
