ADC141S625CIMM - 14-Bit 250kSPS ADC | Texas Instruments
料号： ADC141S625CIMM ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.17 | $61.70 |
| 100 | $5.48 | $548.00 |
| 500 | $4.93 | $2,465.00 |
| 1,000 | $4.39 | $4,390.00 |
ADC141S625CIMM 概述
A SAR ADC is a converter architecture that uses a binary-search capacitor array and a comparator to determine the input voltage one bit at a time per conversion cycle. SAR ADCs offer deterministic latency, low power consumption, and excellent DC accuracy compared to pipeline or delta-sigma converters, making them the dominant choice for multiplexed data-acquisition systems, industrial process control, and precision instrumentation requiring 10- to 16-bit resolution at sample rates up to a few MSPS.
Key features include 14-bit resolution with no missing codes, an integrated 4.096V reference, a single 0V-to-VREF analog input, and an SPI-compatible serial interface supporting clock rates up to 20 MHz. Typical INL is rated at +/-0.5 LSB, and the device achieves 71.5 dB SNR and 87 dB SFDR at the rated throughput. Power consumption is approximately 8.7 mW at 250 kSPS from a 5V supply, scaling linearly with sample rate.
The ADC141S625 uses a charge-redistribution capacitor-DAC core with input-track-and-hold, achieving 14-bit resolution in a footprint targeted at multi-channel systems where board area is constrained. Its serial data interface eliminates parallel data-bus routing, simplifying PCB layout for high-density designs.
Typical applications include industrial process control loop monitoring, precision sensor signal conditioning, optical module power monitoring, multi-channel instrumentation front-ends, and battery-powered portable measurement equipment. The integrated reference minimizes external BOM, while the MSOP-8 footprint allows dense 4- or 8-channel boards.
When designing with this converter, decouple AVDD with a 10 uF tantalum and 0.1 uF ceramic capacitor as close to the pin as possible. Drive CS low only when reading valid conversion data; back-to-back CS pulses during conversion may inject kickback noise into the input sample-and-hold.
直接替换替代料： ADC141S625CIMM ——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： ADC141S625CIMM （相同外形与封装尺寸） ——差异在于 Package, Resolution, RoHS Status, Input Type, Architecture.
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 →ADC141S625CIMM/NOPB-TR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADC122S101CIMM
✅ 直接替换✓ 有现货
$1.96 / 个
查看数据手册 →ADC122S051CIMMX
✅ 直接替换✓ 有现货
$2.99 / 个
查看数据手册 →ADC102S101CIMM
✅ 直接替换✓ 有现货
$1.55 / 个
查看数据手册 →ADC141S625CIMM 最大额定值与电气特性
| 分辨率 | 14 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 |
| Sample Rate (max) | 250 kSPS |
| Analog Input Range | 0 V to VREF |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 1.6 V to 5.25 V |
| Reference Type | Internal (4.096 V) |
| Signal-to-Noise Ratio (SNR) | 71.5 dB |
| Spurious-Free Dynamic Range (SFDR) | 87 dB |
| Power Consumption | 8.7 mW at 250 kSPS (5 V) |
| Digital Interface | SPI / QSPI / MICROWIRE / DSP-compatible |
| 工作温度 | -40 C to +85 C |
| 封装 | 8-VSSOP (Mini-SOIC, MSOP) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (per /NOPB variant) |
ADC141S625CIMM 引脚配置
| 引脚 1 | AVDD — Analog supply voltage input (4.75V to 5.25V) |
| 引脚 2 | IN+ — Non-inverting analog input (single-ended, 0V to VREF) |
| 引脚 3 | AGND — Analog ground |
| 引脚 4 | VREF / REFCAP — Internal reference bypass / external reference input |
| 引脚 5 | CS — Chip-select (active low) for SPI interface |
| 引脚 6 | SCLK — Serial clock input for SPI interface |
| 引脚 7 | DOUT/DRDY — Serial data output, also serves as data-ready indicator |
| 引脚 8 | DVDD — Digital supply voltage input (1.6V to 5.25V) |
典型应用
ADC141S625CIMM 适用于 6 应用s: Industrial Process Control Monitoring, Precision Sensor Signal Conditioning, Optical Module Power Monitoring, Multi-Channel Data Acquisition Front-Ends, Portable Measurement Equipment, Battery Management & Monitoring Systems.
Industrial Process Control Monitoring
In industrial process-control PLCs and 4-20 mA loop monitors, the ADC141S625CIMM digitizes low-frequency transducer signals at up to 250 kSPS aggregate, easily handling 4-/8-channel multiplexed loops at 30 kSPS each. The integrated 4.096 V reference and 14-bit no-missing-codes performance guarantee +/-0.6 mV absolute measurement uncertainty over the 0-5V sensor range, sufficient for 0.1% full-scale process calibration. Its SPI-compatible serial interface shares SCLK/DOUT across multiple ADC chips via per-device CS lines, simplifying PCB layout in compact PLC backplanes where board area is constrained to the MSOP-8 footprint.
推荐
Precision Sensor Signal Conditioning
Precision sensor front-ends for strain-gauge bridges, RTD conditioning boards, and thermocouple cold-junction compensation modules benefit from the ADC141S625CIMM's 14-bit DC linearity and SAR architecture. The deterministic per-conversion latency simplifies digital post-filtering because there is no pipeline delay to track. The integrated 4.096 V reference eliminates a discrete reference component, reducing BOM count by one IC and easing thermal management on dense 4-channel sensor boards.
推荐
Optical Module Power Monitoring
SFP/QSFP optical transceivers and tunable laser modules require compact, low-power ADCs to monitor transmit-power and bias-current photodiode signals at 1-10 kHz rates. The ADC141S625CIMM's 8-VSSOP footprint fits inside a stacked optical-engine PCB, and its 8.7 mW power consumption keeps module thermal budgets within the 1.5 W SFP envelope. The SAR architecture's excellent DC linearity ensures laser APC loop stability, while the SPI interface shares the module's existing I2C/SPI management bus through simple chip-select gating.
推荐
Multi-Channel Data Acquisition Front-Ends
Modular data-acquisition cards with 8 or 16 analog input channels use one ADC141S625CIMM per channel in a time-multiplexed 8:1 configuration. At 250 kSPS aggregate, each converter handles 30 kSPS per channel - more than sufficient for vibration, audio-band, and thermocouple sampling. The 8-VSSOP package allows 4 converters per square inch of PCB, and per-channel simultaneous-sampling variants (e.g., ADS1278) can be added later without board rework if higher bandwidth is needed. Firmware uses standard SPI routines to read sequential channel data through a chip-select decoder.
推荐
Portable Measurement Equipment
Handheld digital multimeters, bench-top panel meters, and battery-powered calibration instruments benefit from the ADC141S625CIMM's scalable power consumption that decreases linearly with reduced sample rate via its power-down command. At 1 kSPS in standby, the converter typically draws under 1 mW, extending battery life significantly. The 14-bit resolution provides 0.006% full-scale count resolution, more than adequate for 4-1/2 digit DMM display precision. The MSOP-8 footprint keeps PCB size small enough for handheld enclosures.
推荐
Battery Management & Monitoring Systems
In Li-ion battery-pack monitoring circuits for e-mobility and backup-power systems, the ADC141S625CIMM measures individual cell voltages at high accuracy. Up to 12 cells in series can share a single converter through a high-voltage MUX, achieving 250 kSPS aggregate (about 20 kSPS per cell) - ideal for cell-balancing feedback loops and State-of-Charge calculations. The integrated reference and 5V analog supply simplify isolation barrier design, while the SPI interface is compatible with the BMS controller's existing peripheral bus.
推荐
推荐产品汇总
工程参考数据： ADC141S625CIMM ——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 | ADC122S101CIMM | ADC122S051CIMMX | ADC102S101CIMM |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-VSSOP (MSOP) | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same |
| Resolution | 14 bits | 14 bits | 14 bits | 12 bits | 12 bits | 10 bits |
| Sample Rate (max) | 250 kSPS | 250 kSPS | 250 kSPS | 1 MSPS | 500 kSPS | 1 MSPS |
| Input Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Analog Supply Voltage | 4.75V to 5.25V | 4.75V to 5.25V | 4.75V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Power Consumption (typ) | 8.7 mW at 250 kSPS | 8.7 mW at 250 kSPS | 8.7 mW at 250 kSPS | 1.5 mW at 1 MSPS | 1.0 mW at 500 kSPS | 1.5 mW at 1 MSPS |
| Reference Type | Internal (4.096V) | Internal (4.096V) | Internal (4.096V) | External (VDD-based) | External (VDD-based) | External (VDD-based) |
| RoHS Compliance | Compliant (/NOPB variant only) | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Integrated 4.096V reference （对比 ADC122S101CIMM)
- 14-bit resolution at 250 kSPS （对比 ADC102S101CIMM)
- Single 5V analog supply operation （对比 ADC122S101CIMM)
设计说明
AVDD and DVDD should be powered from separate, well-decoupled rails. Place a 10 uF tantalum bulk capacitor and a 0.1 uF ceramic capacitor as close as possible to each supply pin. For best noise rejection, star-ground AVDD and DVDD at the regulator output rather than at the device pin. Power-supply rejection degrades above 100 kHz, so additional LC filtering on AVDD is recommended if the source is a switching regulator.
The REFCAP pin requires a low-ESR ceramic bypass capacitor of at least 1 uF to maintain reference stability; 10 uF X5R is recommended for production layouts. Route the REFCAP trace directly to AGND with no shared power-plane currents. Use a guard ring around the analog input pin (IN+) connected to AGND to minimize leakage-induced offset errors; leakage currents above 50 pA degrade 14-bit performance at the 5V full-scale range.
Estimated based on typical SAR ADC behavior: do not toggle CS during an active conversion - the input kickback can inject up to 1 LSB of offset. Wait for the DRDY falling edge (DOUT goes low) before initiating SCLK to read conversion data. The first conversion after power-up or after exiting power-down mode is internally discarded; ignore the first DRDY after power-up to avoid reading a stale value from the reference settling transient.
Keep digital return currents (DGND) physically separated from analog return currents (AGND); join them at a single point near the converter's AGND pin to avoid digital-to-analog ground bounce. The 8-VSSOP exposed pad (where present) should be soldered to AGND plane for thermal dissipation. Trace impedance control is not critical for SAR ADCs, but maintain 50-ohm series termination on SCLK if trace length exceeds 50 mm.
合规信息
RoHS compliance verified for the /NOPB variant per LCSC and DigiKey product listings. AEC-Q100 qualification status not declared by TI for this part family - not recommended for automotive safety-critical applications.
