AD42377 - 12-Bit Analog to Digital Converter | Analog Devices
料号： AD42377 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.75 | $1,375.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.85 | $9,850.00 |
AD42377 概述
An analog-to-digital converter (ADC) is an integrated circuit that samples a continuous analog voltage and converts it into a discrete digital code at a specified sampling rate. In the broader system hierarchy, ADCs sit between analog signal-conditioning circuitry (amplifiers, filters, sensors) and a digital controller (MCU, FPGA, DSP). The 12-bit resolution class typically delivers ~0.024% full-scale quantization step (1 LSB = VREF/4096) and is widely used in industrial process control, sensor readout, motor control feedback loops, and portable instrumentation.
Key features of the AD42377 include single-supply operation, CMOS-compatible digital interface, and a small-form-factor surface-mount package suited for high-density PCB designs. The 12-bit core provides adequate resolution for closed-loop control and many measurement tasks without the cost and latency of higher-resolution 14-/16-/18-/24-bit converters. The device is offered through the ADI global authorized distributor network and ships in standard tape-and-reel packaging.
Architecturally, the AD42377 integrates a sample-and-hold front end, a successive-approximation register (SAR) or flash-style conversion core (per ADI's product category), an internal reference option, and a serial or parallel digital interface. Designers should consult the manufacturer datasheet for the exact input range, sample rate, channel count, and interface timing.
Typical applications include industrial process-control analog input modules, sensor-signal digitization in PLCs, temperature/pressure transmitter front ends, and battery-powered handheld instrumentation where moderate resolution, low power, and a compact footprint are required. When pairing the AD42377 with an upstream instrumentation amplifier, select one with low offset and low noise so that the ADC's quantization noise remains the dominant error source. Design with adequate input filtering (an RC anti-alias network) and bypass capacitors on every supply pin. This page synthesizes distributor stock, application guidance, and pin-compatibility notes beyond the raw datasheet.
直接替换替代料： AD42377 ——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： AD42377 （相同外形与封装尺寸） ——差异在于 Resolution.
快速对比工具——选择替代料号进行并排对比：
AD42378
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD7942BCPZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.6 / 个
查看数据手册 →AD42377 最大额定值与电气特性
| Manufacturer | Analog Devices, Inc. |
| Product Category | Data Acquisition - Analog to Digital Converters (ADC) |
| 分辨率 | 12 bit |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel |
AD42377 standard 引脚配置指南
AD42377（standard 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： AD42377.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD42377 适用于 6 应用s: Industrial Process Control Analog Input Module, Sensor Signal Digitization Front End, Battery-Powered Handheld Instrumentation, Motor Control Current / Voltage Feedback Loop, Data Acquisition System Analog Front End, IoT Edge Sensor Node Digitizer.
Industrial Process Control Analog Input Module
The AD42377's 12-bit resolution (4096 codes, ~0.024% per LSB) suits PLC analog input modules that monitor 4-20 mA or 0-10 V process variables such as tank level, flow rate, and pressure. Digitizing a 0-10 V signal yields ~2.4 mV per LSB, more than adequate for closed-loop control where the downstream PID controller smooths quantization noise. Place the ADC behind a signal-conditioning amplifier and a first-order RC anti-alias filter (fc ~ sample_rate / 2). The surface-mount package supports high-density backplane designs and the wide ADI authorized-distribution network minimizes sourcing risk for factory-floor deployments.
推荐
Sensor Signal Digitization Front End
The AD42377 digitizes low-bandwidth analog outputs from temperature, pressure, and position sensors after upstream amplification. For thermocouple or strain-gauge bridges, pair the ADC with a precision instrumentation amp such as AD8421 to bring the differential signal into the converter's input common-mode range. A 12-bit converter is sufficient for applications where the measurement precision requirement is ~0.1% of full scale; for higher-accuracy demands, escalate to 16-/18-/24-bit ADCs (e.g., AD7799). Bypass every supply pin with 0.1 uF ceramic plus 10 uF bulk capacitance to keep digital switching noise out of the analog reference.
推荐
Battery-Powered Handheld Instrumentation
Handheld multimeters, portable test gear, and field data loggers benefit from the AD42377's moderate resolution and surface-mount footprint. A 12-bit ADC provides adequate digitizing resolution for many field measurements while keeping system cost and power consumption low compared with 16-/18-bit parts. Operating from a single low-voltage supply simplifies Li-Ion or 4xAA battery designs. Designers should add power-rail sequencing and an LC filter on the supply line to suppress the boost-converter switching noise from contaminating the analog reference.
推荐
Motor Control Current / Voltage Feedback Loop
In brushless DC (BLDC) and stepper motor drives, the AD42377 can sample phase current or back-EMF voltage for the control loop's ADC channel. A 12-bit converter at moderate sampling rates is sufficient for trapezoidal commutation schemes; field-oriented control (FOC) requiring higher bandwidth may need faster sample rates. Place a low-inductance shunt resistor in series with the motor phase and amplify the differential voltage into the ADC's input range with a current-sense amplifier. The compact surface-mount package fits within the tight PCB real-estate of integrated motor-drive modules.
推荐
Data Acquisition System Analog Front End
Multi-channel data acquisition systems often allocate a 12-bit ADC such as the AD42377 per channel for cost-effective parallel sampling architectures. The surface-mount package supports dense PCB layouts where many ADCs sit close to their analog signal sources. Pair the converter with a low-noise reference (ADR01/ADR02) and an instrumentation amplifier to maximize dynamic range. Designers should synchronize sampling clocks across channels and use a common reference to minimize channel-to-channel gain error in measurement instruments.
推荐
IoT Edge Sensor Node Digitizer
Low-power IoT edge nodes (smart agriculture, environmental monitoring, smart-building sensors) use a 12-bit ADC such as the AD42377 to digitize analog sensor outputs before transmitting over BLE/LoRa. A 12-bit converter provides ~0.024% resolution, sufficient for slow-changing measurements such as soil moisture, ambient temperature, and indoor air-quality sensors. Operating from a coin-cell or Li-Ion battery, the design benefits from the ADC's compact surface-mount form factor. Place a low-pass RC filter ahead of the analog input to remove high-frequency environmental noise.
推荐
推荐产品汇总
工程参考数据： AD42377 ——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 | AD42378 | AD7942 |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 14 bit |
关键差异点
- ADI precision data-converter portfolio support and authorized distribution （对比 ADS7813 (Texas Instruments))
- Same-family pin-compatibility within the AD4237x product line （对比 AD7942 (Analog Devices 14-bit))
- 12-bit resolution targeted at cost-sensitive industrial applications （对比 ADS8482 (Texas Instruments 14-bit, 65 MSPS))
设计说明
Bypass every AD42377 supply pin with a 0.1 uF X7R ceramic placed within 2-3 mm of the pin, plus a 10 uF bulk tantalum or ceramic on each main supply rail. Estimated: switching noise on a poorly decoupled analog supply can couple into the ADC reference and degrade SNR by 6-10 dB. If the design uses a switching regulator upstream, add a ferrite bead and a second LC filter stage between the switcher and the ADC supply pin.
Place a first-order RC anti-alias filter on the analog input with a cutoff at one-half the sample rate (Nyquist). For example, with a 100 kSPS sample rate, fc ~ 50 kHz; choose R from the source impedance budget and C to set the corner. Estimated: at fc = 50 kHz with R = 1 kohm and C = 3.3 nF, attenuation at the ADC's first aliasing frequency (fs - fin) is approximately -40 dB/decade. Keep analog traces short and away from digital clock lines to minimize crosstalk.
Do not assume the AD42377's reference voltage without consulting the datasheet; many 12-bit ADCs require an external precision reference (e.g., ADR01/ADR02) to achieve datasheet SNR. Estimated: using the internal reference at 3.3 V versus an external 5 V reference can change full-scale range by 50% and effective LSB size by the same factor. Verify input common-mode range, absolute maximum ratings on analog inputs, and the digital-interface logic levels (typically 1.8 V, 3.3 V, or 5 V CMOS) before committing to a design.
合规信息
Compliance status was not present in the verified web data captured on 2026-10-12. Confirm RoHS, REACH, lead-free, and conflict-mineral status directly on the Analog Devices product page or by contacting ADI customer support before qualifying the part for production.
