ADC141S625CIMMX/NOPB - 14-Bit 50-250kSPS Differential ADC | TI
料号： ADC141S625CIMMX/NOPB ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.1 | $4,100.00 |
ADC141S625CIMMX/NOPB 概述
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that samples continuous-time, continuous-amplitude analog signals and converts them into discrete digital codes. Successive-approximation-register (SAR) ADCs like the ADC141S625 use a binary-search algorithm through an internal DAC to converge on the input voltage within N conversion cycles, producing N-bit resolution. The ADC141S625 sits at the bottom of the precision converter hierarchy: SAR ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features include 14-bit resolution with no missing codes, true-differential input for excellent common-mode noise rejection, a low-power architecture drawing micro-amps in shutdown, an external reference input for system-level flexibility, and a small-footprint VSSOP-8 (DGK) package. The wide input voltage range combined with differential sampling makes the part tolerant of ground-loop noise in industrial sensor interfaces.
Typical applications include precision sensor signal chains (load cells, strain gauges, RTD bridges), industrial process-control analog front ends, portable/battery-powered instrumentation, factory-automation modules, and medical monitoring front ends. The differential input simplifies direct bridge-digitization, eliminating instrumentation amplifiers in many designs.
When designing with this part, pair the ADC with an external low-noise reference and provide adequate input protection (ESD diodes, RC anti-aliasing filters sized below half the Nyquist rate). Note that this part carries the /NOPB suffix indicating lead-free, Pb-free matte-tin finish and is RoHS compliant.
直接替换替代料： ADC141S625CIMMX/NOPB ——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： ADC141S625CIMMX/NOPB （相同外形与封装尺寸） ——差异在于 Sampling Rate, Architecture, Number of Channels, Package, Resolution.
快速对比工具——选择替代料号进行并排对比：
ADC141S625CIMM/NOPB
✅ 直接替换✓ 有现货
$2.49 / 个
查看数据手册 →ADC141S625CIMMX
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →ADC141S626CIMM/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
ADC141S625CIMMX/NOPB 最大额定值与电气特性
| 分辨率 | 14 bit |
| Number of Channels | 1 |
| 采样率 | 50 kSPS to 250 kSPS |
| Input Type | Differential |
| Architecture | SAR (Successive Approximation Register) |
| Data Interface | SPI / QSPI / MICROWIRE compatible serial |
| 封装 | 8-VSSOP (DGK) |
| 工作温度 | -40C to +85C (industrial) |
| Reference Type | External |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited) |
| RoHS 状态 | Compliant |
| Lead-Free Finish | Yes (NOPB suffix - Pb-free matte tin) |
| Packaging | Tape & Reel (CIMMX = tape/reel, /NOPB = lead-free) |
ADC141S625CIMMX/NOPB 引脚配置
| 引脚 1 | VIN+ — Positive differential analog input |
| 引脚 2 | VIN- — Negative differential analog input |
| 引脚 3 | GND — Ground |
| 引脚 4 | REF — External reference voltage input |
| 引脚 5 | CS — Chip select (active low) for SPI interface |
| 引脚 6 | SCLK — Serial clock input for SPI |
| 引脚 7 | DOUT — Serial data output |
| 引脚 8 | VDD — Positive supply voltage |
典型应用
ADC141S625CIMMX/NOPB 适用于 7 应用s: Precision Bridge Sensor Digitization, Industrial Process Control Analog Front End, Portable Battery-Powered Instrumentation, Medical Monitoring Equipment, Factory Automation Sensor Modules, Energy Monitoring and Smart Metering, Test and Measurement Equipment.
Precision Bridge Sensor Digitization
The ADC141S625's true-differential 14-bit input and 50-250 kSPS sampling rate make it ideal for direct digitization of bridge sensors including load cells, strain gauges, and pressure transducers. The differential input rejects common-mode noise from long sensor cable runs, eliminating the need for an external instrumentation amplifier. With 14-bit resolution (16384 codes), the converter provides sufficient dynamic range for weighing scales and force-measurement applications where sub-gram accuracy is required. The 8-VSSOP package fits compact PCB layouts inside sensor housings.
推荐
Industrial Process Control Analog Front End
For industrial PLC analog input modules measuring 4-20 mA current loops or 0-10V voltage signals, the ADC141S625 provides 14-bit resolution at sample rates up to 250 kSPS. The SPI-compatible serial interface simplifies isolation barrier implementation with digital isolators, allowing the ADC to sit on the field side of the isolation boundary. Industrial -40C to +85C temperature rating supports factory-floor deployment. Differential sampling rejects motor drive noise common in factory automation cabinets.
推荐
Portable Battery-Powered Instrumentation
The micro-power architecture of the ADC141S625 suits handheld multimeters, portable medical monitors, and battery-operated data loggers where every microamp matters. The SAR topology consumes power only during active conversion, allowing duty-cycled sampling to extend battery life. The 8-VSSOP footprint enables miniaturized PCB designs in handheld form factors. Differential inputs simplify thermocouple and RTD interfaces used in field-test instrumentation.
推荐
Medical Monitoring Equipment
Medical monitoring devices such as patient vital-sign monitors and portable diagnostic equipment benefit from the ADC141S625's 14-bit precision and differential input for ECG, temperature, and SpO2 signal chains. The low-power consumption extends battery life in ambulatory monitors, while the small VSSOP package fits wrist-watch form factors. The external reference input allows the system designer to optimize noise performance per channel for medical-grade signal fidelity.
推荐
Factory Automation Sensor Modules
Factory automation sensor modules measuring proximity, position, or process variables use the ADC141S625 to digitize analog sensor outputs at high sampling rates. The 250 kSPS maximum sample rate supports multi-channel time-multiplexed acquisition through external analog switches. The differential input simplifies direct connection to bridge-type position sensors and LVDT signal conditioning circuits. Industrial temperature rating ensures reliable operation in unconditioned factory environments.
推荐
Energy Monitoring and Smart Metering
Smart electricity meters and energy-monitoring sub-systems use the ADC141S625 for digitizing current-sense and voltage-sense signals from shunt resistors and CTs. The 14-bit resolution and differential input support accurate power calculation across the dynamic range of household and industrial loads. The low power consumption suits always-on metering applications, while the small package allows integration into compact meter form factors. SPI interface simplifies connection to metering MCUs.
推荐
Test and Measurement Equipment
Bench-top and portable test equipment benefit from the ADC141S625's 14-bit precision for digitizing sensor signals in laboratory and field-test setups. The differential input supports direct connection to differential probes and bridge sensors used in materials testing. Combined with an external precision reference, the ADC achieves the linearity required for calibrated test instruments. The 8-VSSOP package allows dense PCB layouts with multiple ADC instances for multi-channel data acquisition systems.
推荐
推荐产品汇总
工程参考数据： ADC141S625CIMMX/NOPB ——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 | ADC141S625CIMM/NOPB | ADC141S625CIMMX | ADC141S626CIMM/NOPB |
|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 50-250 kSPS | 50-250 kSPS | 50-250 kSPS | 50-250 kSPS |
| Input Type | Differential | Differential | Differential | Differential |
| Shipping Format | Tape & Reel | Tube | Tape & Reel | Tube |
| Lead-Free (NOPB) | Yes | Yes | No | Yes |
| Architecture | SAR | SAR | SAR | SAR |
关键差异点
- Same-brand drop-in alternative available in non-NOPB finish （对比 ADC141S625CIMMX)
- Sister part in the same family with similar performance （对比 ADC141S626CIMM/NOPB)
- Tube packaging alternative available from same family （对比 ADC141S625CIMM/NOPB)
设计说明
The ADC141S625 requires a clean analog supply; place a 10uF tantalum bulk capacitor plus a 0.1uF ceramic bypass capacitor close to the VDD pin. For best noise performance, derive the ADC supply from a low-noise LDO (such as TPS7A47) rather than directly from a switching converter. Add a ferrite bead if the ADC must share a rail with digital logic to prevent digital switching noise from coupling into the analog input.
Keep analog input traces short and symmetric for the differential pair. Route the SPI digital lines (SCLK, DOUT, CS) away from the analog input traces to avoid digital coupling. Use a ground plane under the ADC with the analog and digital grounds star-connected at the ADC GND pin. Place the external reference capacitor immediately adjacent to the REF pin with a short, low-inductance trace.
Estimated: at 250 kSPS full-rate sampling, an anti-aliasing RC filter with fc at approximately 125 kHz (Nyquist) should be placed ahead of the analog input to prevent aliasing of out-of-band noise. Designers commonly omit the differential anti-aliasing filter and discover spurious codes in production testing. Verify the reference voltage source can supply the ADC reference current without droop at maximum sampling rate.
The differential input structure rejects common-mode noise up to the specified common-mode range; however, exceeding this range at the input pins will distort the conversion result or damage the input ESD structures. Add external clamping diodes if the input can exceed the supply rail during fault events. Maintain a stable common-mode voltage (typically VDD/2) at the input pins for maximum dynamic range.
合规信息
RoHS compliant per the /NOPB suffix designation. Lead-free matte-tin finish. Industrial -40C to +85C temperature rating; not AEC-Q100 qualified for automotive applications.
