ADC141S625CIMM - 14-Bit 250kSPS ADC | Texas Instruments
MPN: ADC141S625CIMM ✓ Hoạt độngADC141S625CIMM Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADC141S625CIMM — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADC141S625CIMM (cùng hình factor và footprint) — khác nhau ở Package, Resolution, RoHS Status, Input Type, Architecture.
ADC141S625CIMM/NOPB
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC141S625CIMMX
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC141S625CIMM/NOPB-TR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADC122S101CIMM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC122S051CIMMX
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC102S101CIMM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADC141S625CIMM Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 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 |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 8-VSSOP (Mini-SOIC, MSOP) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per /NOPB variant) |
Cấu hình chân ADC141S625CIMM
| Chân 1 | AVDD — Analog supply voltage input (4.75V to 5.25V) |
| Chân 2 | IN+ — Non-inverting analog input (single-ended, 0V to VREF) |
| Chân 3 | AGND — Analog ground |
| Chân 4 | VREF / REFCAP — Internal reference bypass / external reference input |
| Chân 5 | CS — Chip-select (active low) for SPI interface |
| Chân 6 | SCLK — Serial clock input for SPI interface |
| Chân 7 | DOUT/DRDY — Serial data output, also serves as data-ready indicator |
| Chân 8 | DVDD — Digital supply voltage input (1.6V to 5.25V) |
Ứng dụng tiêu biểu
ADC141S625CIMM phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADC141S625CIMM — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Integrated 4.096V reference (vsADC122S101CIMM)
- 14-bit resolution at 250 kSPS (vsADC102S101CIMM)
- Single 5V analog supply operation (vsADC122S101CIMM)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
