ADC082S101CIMMX - 2-Ch 8-Bit 1MSPS SAR ADC | Texas Instruments
MPN： ADC082S101CIMMX ✓ 啟用中ADC082S101CIMMX 概覽
An ADC (analog-to-digital converter) is a mixed-signal data-acquisition IC that samples a continuous-time analog voltage and converts it into a discrete digital code. Within the broader semiconductor taxonomy, ADC082S101 belongs to the SAR converter family (instantaneous sampling, no pipeline latency), which is a sub-class of data converters under signal-chain / data-acquisition ICs, itself part of the power management and analog signal-chain hierarchy. SAR ADCs are preferred where deterministic latency, simple serial interfacing, and low power are required.
Key features include two single-ended input channels multiplexed into a single SAR core, throughput scalable from 500 ksps to 1 MSPS via an external SCLK between 8 MHz and 16 MHz, an input span of 0 V to VA, and an industrial -40 °C to +85 °C temperature grade. The VSSOP-8 footprint with 0.65 mm pitch suits compact, surface-mount designs.
The device uses a charge-redistribution SAR architecture with an on-chip sample-and-hold and an internal reference equal to VA. The serial interface is a 4-wire SPI/QSPI/MICROWIRE-compatible port (CS, SCLK, DOUT, +VA/GND), with data clocked out on falling SCLK edges. Because VA doubles as the reference, no external reference component is needed, but rail noise directly couples into conversion accuracy.
Typical applications include portable instrumentation, battery-powered sensor front ends, industrial process-control monitoring points, and consumer-system signal conditioning where a low-channel-count, deterministic-latency converter is sufficient.
When designing with this device, place a 0.1 µF decoupling capacitor close to the VA pin and keep analog input traces short. Because VA is the reference, any noise or ripple on the supply rail will appear as conversion error; an LDO or RC filter on VA is recommended in noisy environments. The "M" trailing the part number denotes tape-and-reel packaging.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing an engineering-oriented decision resource.
直接替換替代品，適用於 ADC082S101CIMMX — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADC082S101CIMMX （相同外形與佔位） — 差異在於 Package, Operating Temperature, Number of Channels, RoHS Status, Supply Voltage (VA).
ADC082S101CIMMX/NOPB
✅ 直接替換📋 參考替代品（不在目錄中）
ADC082S101CIMM
✅ 直接替換聯絡詢價
查看資料表 →ADC082S101CIMM/NOPB
✅ 直接替換📋 參考替代品（不在目錄中）
ADC081S051CISD
✅ 直接替換聯絡詢價
查看資料表 →ADC081S051CISDX/NOPB
✅ 直接替換聯絡詢價
查看資料表 →ADC082S101CIMMX 最大額定值與電氣特性
| 解析度 | 8 bit |
| Number of Channels | 2 |
| 取樣率 | 500 ksps to 1 Msps |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Single-ended |
| Supply Voltage (VA) | 2.7 V to 5.25 V |
| Power Consumption at 3 V | 3.2 mW (normal operation) |
| Power Consumption at 5 V | 9.6 mW (normal operation) |
| 輸入電壓範圍 | 0 V to VA |
| Reference | Internal (VA = reference) |
| SCLK Frequency | 8 MHz to 16 MHz |
| Digital Interface | SPI / QSPI / MICROWIRE-compatible 4-wire serial |
| Output Format | Straight binary, serial |
| 工作溫度 | -40 °C to +85 °C (industrial) |
| 封裝 | 8-pin VSSOP (DGK), 3.00 mm × 3.00 mm, 0.65 mm pitch |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ADC082S101CIMMX 腳位配置
| 腳位 1 | CH0 — Analog input channel 0 |
| 腳位 2 | CH1 — Analog input channel 1 |
| 腳位 3 | VA — Analog supply (also ADC reference) |
| 腳位 4 | GND — Ground |
| 腳位 5 | DOUT — Serial data output |
| 腳位 6 | CS — Chip select (active low) |
| 腳位 7 | SCLK — Serial clock input |
| 腳位 8 | VA — Analog supply (also ADC reference) |
典型應用
ADC082S101CIMMX 適用於 6 應用s: Portable Battery-Powered Instrumentation, Industrial Process-Control Monitoring, Consumer System Signal Conditioning, Sensor Front-End Digitization, Data-Acquisition Modules and Dongles, Motor-Control Feedback Channels.
Portable Battery-Powered Instrumentation
The ADC082S101CIMMX suits portable instrumentation because of its low 3.2 mW power at 3 V and a wide 2.7 V to 5.25 V supply range that accepts Li-ion, 2x AA, or USB-fed rails directly. With 1 MSPS throughput across two single-ended channels, it can digitize both a primary sensor and a reference/junction-compensation input in parallel from a single SAR core. Its SPI/QSPI/MICROWIRE-compatible 4-wire serial port connects to virtually any low-power MCU (e.g. MSP430 or STM32) without glue logic. Because VA doubles as the reference, an LDO ahead of VA is recommended to keep conversion noise low when supply ripple is high.
推薦
Industrial Process-Control Monitoring
In industrial 4-20 mA or 0-10 V monitoring points, the ADC082S101CIMMX provides deterministic SAR latency and 8-bit resolution adequate for set-point and threshold reporting. Its -40 °C to +85 °C industrial grade and VSSOP-8 small footprint fit dense PLC analog-input cards. Two single-ended inputs let one channel read the process variable while the other monitors a redundant sensor or supply-rail health. The 4-wire SPI/QSPI/MICROWIRE interface simplifies isolated digital coupling because only four signals must cross the isolator barrier, reducing BOM and improving noise immunity versus parallel-interface ADCs.
推薦
Consumer System Signal Conditioning
For consumer products such as white goods, set-top boxes, and appliance controls, the ADC082S101CIMMX offers a compact two-channel monitoring solution. Its 1 MSPS throughput easily captures user-interface knob voltages or thermistor-divider outputs without latency. The straight-binary SPI output can be DMA-fed on most modern microcontrollers, leaving CPU time free for housekeeping tasks. With only 3.2 mW at 3 V, the part adds negligible standby drain, supporting Energy Star and EU eco-design standby budgets for always-on sensing channels in connected appliances.
推薦
Sensor Front-End Digitization
The ADC082S101CIMMX is well suited to digitizing analog sensor front ends such as thermistor bridges, photodiode amplifiers, or potentiometer wiper voltages. Two single-ended inputs let one channel read the active sensor while the other monitors a reference or ambient-compensation signal, enabling software-side ratiometric correction. Because VA serves as the ADC reference, the sensor bridge and ADC reference the same rail, providing first-order ratiometric cancellation of VA drift. Its SAR core adds no pipeline latency, making it appropriate for closed-loop control loops where deterministic conversion delay matters.
推薦
Data-Acquisition Modules and Dongles
Compact USB-, Bluetooth-, or Wi-Fi-based data-acquisition modules benefit from the ADC082S101CIMMX's small VSSOP-8 footprint and low power. The two single-ended inputs handle one primary and one auxiliary measurement (for example a thermocouple plus a cold-junction sensor) at 1 MSPS aggregate throughput. The 4-wire SPI/QSPI/MICROWIRE-compatible serial output requires only four MCU pins, leaving GPIO free for status LEDs or push-buttons. Because the part needs no external reference, the analog BOM remains minimal, which is important for cost-sensitive dongle designs.
推薦
Motor-Control Feedback Channels
In small BLDC or stepper motor control boards, the ADC082S101CIMMX can digitize back-EMF, current-sense, or potentiometer feedback signals. Although 8-bit resolution is too coarse for high-performance torque loops, it is sufficient for stall detection, threshold-based current limiting, or speed-setpoint reading. Two single-ended channels can monitor a current-sense amplifier and a supply-rail monitor simultaneously. The deterministic SAR latency simplifies software timing because each conversion completes in a known number of SCLK cycles, easing interrupt-driven control firmware design.
推薦
推薦產品摘要
工程參考資料，適用於 ADC082S101CIMMX — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADC082S101CIMMX/NOPB | ADC082S101CIMM | ADC082S101CIMM/NOPB | ADC081S051CISD | ADC081S051CISDX/NOPB |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VSSOP-8 (DGK) | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Number of Channels | 2 | 2 | 2 | 2 | 1 | 1 |
| Maximum Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 200-500 kSPS | 200-500 kSPS |
| Supply Voltage Range | 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 | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Digital Interface | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Pin-to-Pin Compatible | Yes (base part) | Yes | Yes | Yes | Yes (verify channel mapping per datasheet) | Yes (verify channel mapping per datasheet) |
主要差異化特點
- Dual-channel SAR architecture in VSSOP-8 (對比ADC081S051CISD)
- Up to 1 MSPS throughput (對比ADC081S051CISD)
- Lead-free / Rohb variants available on the same die (對比ADC082S101CIMM (matte-tin base))
- Deterministic SAR latency (對比Pipelined ADC architectures)
設計說明
Because VA serves as the ADC reference per the TI datasheet, any noise or ripple on the VA rail directly couples into conversion accuracy. Estimated: with a 50 mV ripple on a 3.3 V VA, an 8-bit conversion can lose up to 1 LSB of effective resolution. Place a 0.1 µF decoupling capacitor close to the VA pin and add a 10 µF bulk capacitor on the VA rail. For best noise performance, feed VA from an LDO rather than directly from a switching regulator.
Keep analog input traces short and away from digital switching signals. Use a guarded analog ground plane under the ADC and route the VA trace with adequate width to minimize voltage drop at peak supply current. The VSSOP-8 (DGK) exposed lead frame provides some thermal relief but layout should still keep analog and digital return currents separated to avoid ground-loop noise.
Do not exceed the maximum VA supply voltage of 5.25 V (per TI datasheet). Ensure the analog input signal on CH0/CH1 stays within the 0 V to VA range; signals below GND or above VA will forward-bias ESD diodes and may damage the part. When reading the datasheet timing diagram, remember that SCLK must remain between 8 MHz and 16 MHz - too-slow SCLK will slow throughput, too-fast SCLK will not be recognized.
Use a 4-wire SPI connection with dedicated CS to avoid bus contention. The DOUT line transitions on the falling edge of SCLK per the TI datasheet timing diagram. For long PCB traces (>50 mm), add a 33 Ω series damping resistor at the SCLK driver output to control ringing. If multiple SPI devices share the bus, ensure CS-to-SCLK setup and hold times per the datasheet timing table are respected.
合規資訊
Compliance fields not explicitly stated in verified web data; the /NOPB variant suffix typically indicates Rohb-compliant lead-free plating per TI naming convention, but this is not confirmed in the provided data. AEC-Q100 is not applicable for this non-automotive-grade ADC.
