ADC101S101CIMFX - 10-bit 1MSPS SAR ADC SPI SOT-23-6 | TI
料号： ADC101S101CIMFX ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.15 | $21.50 |
| 100 | $1.85 | $185.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.25 | $1,250.00 |
ADC101S101CIMFX 概述
An SAR ADC (successive-approximation-register analog-to-digital converter) is a type of ADC that converts an analog input to a digital code using a binary search through successive bit trials, with one conversion bit finalized per clock cycle. SAR ADCs sit within the broader data converter hierarchy (ADC -> data converter -> signal chain IC -> mixed-signal semiconductor), offering an excellent balance of speed, accuracy, latency, and power consumption for mid-speed precision applications.
Key features include 1 MSPS throughput, low power consumption (typical supply current below 1 mA at 1 Msps), a high-speed SPI/QSPI/MICROWIRE-compatible serial interface, an industrial temperature range of -40 °C to +85 °C, and a true-differential/single-ended analog input with no pipeline delay. The 6-pin SOT-23 package makes it one of the smallest SAR ADCs available, ideal for space-constrained sensor and instrumentation designs.
The converter is built on a CMOS SAR architecture with an internal track-and-hold, delivering deterministic latency and excellent DC accuracy. Its wide supply range allows direct interfacing to 3.3 V microcontrollers or 5 V systems, simplifying board-level design and reducing external component count.
Typical applications include portable instrumentation, battery-powered sensor data acquisition, industrial process control, embedded system monitoring, and precision measurement front-ends. The compact SOT-23 footprint also suits handheld medical and consumer devices.
When designing with the ADC101S101CIMFX, place a 0.1 µF decoupling capacitor as close as possible to the VDD pin and ensure the analog input source impedance is low (less than ~1 kΩ) to avoid conversion errors caused by the input sampling capacitor. A low-impedance reference such as a dedicated reference IC or a well-filtered supply rail is recommended for best linearity.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single, decision-ready reference.
直接替换替代料： ADC101S101CIMFX ——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： ADC101S101CIMFX （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Resolution, Sample Rate, Architecture.
快速对比工具——选择替代料号进行并排对比：
ADC101S101CIMFX/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
ADC121S101CIMFX
✅ 直接替换✓ 有现货
$1.85 / 个
查看数据手册 →ADC081S101CIMFX
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADC101S101CIMFX 最大额定值与电气特性
| 分辨率 | 10 bit |
| Number of Channels | 1 |
| Architecture | SAR (Successive Approximation) |
| Sample Rate | 500 kSPS to 1 MSPS |
| Supply Voltage (VDD) | 2.7 V to 5.25 V |
| Analog Input Type | Single-ended |
| Analog Input Range | 0 V to VDD |
| 接口 | SPI / QSPI / MICROWIRE-compatible |
| 工作温度 | -40 °C to +85 °C (Industrial) |
| 封装 | SOT-23-6 (LSSOP, gull-wing) |
| Terminal Form | GULL WING |
| Number of Terminals | 6 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (NOPB suffix) |
| Lead-Free | Yes (NOPB suffix) |
ADC101S101CIMFX 引脚配置
| 引脚 1 | VIN — Analog input (single-ended, 0V to VDD) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | DOUT — Serial data output (SPI MISO) |
| 引脚 4 | DIN/SCLK — Serial clock input (SPI SCLK) |
| 引脚 5 | CS — Chip select (active low) |
| 引脚 6 | VDD — Power supply (2.7 V to 5.25 V) |
典型应用
ADC101S101CIMFX 适用于 6 应用s: Portable Sensor Data Acquisition, Industrial Process Control & Monitoring, Embedded System Analog Monitoring, Battery-Powered Handheld Instruments, Precision Measurement Front-End, Consumer Audio & Control Interfaces.
Portable Sensor Data Acquisition
The ADC101S101CIMFX is well-suited to portable sensor data acquisition front-ends where PCB area and battery life are critical. Its SOT-23-6 footprint (about 9 mm²) is one of the smallest packages available for a 10-bit 1 MSPS SAR ADC, enabling tight integration next to MEMS sensors, thermocouples, or strain gauges. At 1 MSPS the converter typically draws well under 1 mA from a 3.3 V rail, so a CR2032 or small Li-ion cell can sustain continuous sampling in duty-cycled measurement bursts. The SPI interface ties directly to low-power MCUs such as MSP430 or STM32L0 families. Engineers should place a 0.1 µF decoupling cap within 3 mm of the VDD pin and use an op-amp buffer (e.g., OPA333) between high-impedance sensors and the ADC input to avoid kickback from the internal sampling capacitor.
推荐
Industrial Process Control & Monitoring
In industrial 4-20 mA loop monitoring, PLC analog-input modules, and factory-automation backplanes, the ADC101S101CIMFX offers deterministic SAR latency with no pipeline delay, which simplifies control-loop timing analysis. The industrial -40 °C to +85 °C temperature rating ensures operation across factory-floor environments without derating. SPI isolation is straightforward using digital isolators (e.g., ISO7741) between the field side and the MCU, allowing safe measurement of 0-24 V signals after resistor-scaling into the ADC's 0-V-to-VDD input range. The 10-bit resolution (1024 codes) translates to roughly 0.1 % FS step size at 5 V supply - adequate for many supervisory and trending measurements. A front-end R-C anti-aliasing filter (typically 1 kΩ / 1 nF for a ~160 kHz cutoff) is recommended.
推荐
Embedded System Analog Monitoring
The ADC101S101CIMFX is frequently used as a housekeeping ADC on embedded computing boards, monitoring rail voltages, temperatures via external diode-connected transistors, and chassis currents. Its SPI interface allows sharing with other peripherals on a single chip-select line, simplifying board routing. At 1 MSPS, multiple slow-moving rails can be oversampled and digitally averaged for effective resolution enhancement. The wide 2.7-5.25 V supply range means it can be powered directly from 3.3 V or 5 V system rails without level shifting. Place the ADC close to the monitored rail and use a 10 kΩ/100 nF RC network at the input to reject high-frequency switching noise from nearby DC-DC converters.
推荐
Battery-Powered Handheld Instruments
Handheld multimeters, medical point-of-care devices, and field-test instruments benefit from the ADC101S101CIMFX's small SOT-23-6 package and low operating current, both of which are essential when battery life and ergonomic size dominate the BOM. The SAR architecture delivers instantaneous conversion with no pipeline latency, so single-shot triggered measurements are immediately available for display - critical for DMM-style functionality. Single 3 V operation suits two AA alkaline cells in series with a boost converter, or direct 3.3 V from a Li-ion cell. Use the SPI bus in MODE 0 (CPOL=0, CPHA=0) and read MSB-first to match common microcontroller firmware drivers.
推荐
Precision Measurement Front-End
For precision measurement instruments such as bench-top dataloggers, weigh-scale read-out boards, and laboratory sensor interfaces, the ADC101S101CIMFX provides 10-bit (approximately 0.1 % FS) absolute accuracy at a low BOM cost. To get the best linearity, drive the ADC input with a low-impedance, low-noise op-amp such as the OPA2277, and supply the reference from a low-noise source like the REF3025 (2.5 V, 50 ppm/°C max drift). Calibration can be implemented in firmware using an external precision reference for gain and offset correction. Keep analog and digital grounds separated and joined at a single point under the ADC to minimize digital switching noise coupling into the analog input.
推荐
Consumer Audio & Control Interfaces
Although primarily aimed at measurement rather than high-fidelity audio, the ADC101S101CIMFX is used in consumer products for slow-rate control and monitoring tasks: keypad analog scanning, lighting control feedback, fan-speed sensing, and appliance user-interface reading. Its tiny SOT-23-6 package lets designers add one or two housekeeping ADCs without consuming significant PCB real estate, even in cost-sensitive consumer goods. The 2.7-5.25 V supply range allows direct operation from common 3.3 V or 5 V appliance rails. Using oversampling and digital averaging in firmware, designers can effectively increase the resolution and SNR for slow-changing signals.
推荐
推荐产品汇总
工程参考数据： ADC101S101CIMFX ——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 | ADC101S101CIMFX/NOPB | ADC121S101CIMFX | ADC081S101CIMFX |
|---|---|---|---|---|
| Package | SOT-23-6 | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10 bit | 10 bit | 12 bit | 8 bit |
| Sample Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Architecture | SAR | SAR | SAR | SAR |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Interface | SPI | SPI | SPI | SPI |
关键差异点
- One of the smallest 10-bit 1 MSPS SAR ADCs available （对比 Generic 10-bit 1 MSPS SAR ADCs in MSOP-8 or TSSOP packages)
- Family option for higher or lower resolution （对比 ADC121S101CIMFX (12-bit) and ADC081S101CIMFX (8-bit))
- Drop-in RoHS-compliant successor available （对比 ADC101S101CIMFX/NOPB)
设计说明
Decouple the VDD pin with a 0.1 µF X7R ceramic capacitor placed within 3 mm of the pin. For noisy digital environments, add a 10 µF bulk capacitor in parallel. Although the ADC101S101CIMFX draws only a few hundred microamps, peak current transients at the SCLK edge can cause reference-voltage droop without proper bypassing, degrading conversion accuracy.
Keep analog input traces short and routed away from digital SPI lines to minimize digital-to-analog coupling. Use a single-point ground connection between the ADC GND pin and the MCU GND, with analog and digital ground planes joined only beneath the converter. Avoid routing the SCLK and DOUT traces parallel to the analog input trace on adjacent layers.
Do not drive the ADC input with a source impedance higher than ~1 kΩ, or the internal sampling capacitor will not settle within the acquisition window, causing gain errors and non-linearity. Insert a low-impedance op-amp buffer (e.g., OPA333) for high-impedance sources. Also verify the SPI mode - the ADC101S101 family uses SPI Mode 0 (CPOL=0, CPHA=0) with MSB-first data, mismatching this will produce all-zero or all-one readings.
合规信息
RoHS and lead-free compliance confirmed for the /NOPB suffix variant per TI product page. Base non-NOPB MPN is obsolete and may predate the latest RoHS revision.
