ADC108S022CIMT - 8-Ch 10-Bit 50-200kSPS SAR ADC | Texas Instruments
MPN: ADC108S022CIMT ✓ فعالADC108S022CIMT نمای کلی
What is a SAR ADC? A successive-approximation register analog-to-digital converter is a type of ADC that performs a binary search across the input voltage using an internal DAC and comparator, producing a single digital code per conversion in N clock cycles (where N is the resolution in bits). SAR ADCs occupy a middle position in the converter hierarchy: they are slower than flash ADCs but faster than integrating or sigma-delta ADCs, and they offer deterministic latency with no pipeline delay, which is essential for multiplexed multi-channel sampling. Within the broader taxonomy, the ADC108S022 belongs to the precision data converter family, the signal-chain IC category, and ultimately the analog semiconductor class.
Key features include low power consumption (typically 1.5 mW at 3 V and 200 kSPS), a true-differential analog input architecture with an internal track-and-hold, an external voltage reference input, and a hardware-/software-controlled channel selection register. The part is specified for the industrial temperature range (-40 °C to +105 °C) and provides unipolar input ranges from 0 V to VREF. The serial data frame carries the channel tag and 10-bit conversion result, simplifying firmware decoding.
The internal architecture combines an 8-to-1 input MUX, a sample-and-hold amplifier, a precision SAR core, and an internal bandgap-derived reference buffer. With conversion rates scalable via the SCLK input, designers can trade throughput for power dissipation across a wide dynamic range without external clock-generation circuitry.
Typical applications include multi-channel sensor monitoring in industrial PLCs, portable instrumentation, battery management systems, HVAC environmental sensors, and consumer white-goods control boards. The wide supply range and small footprint also suit it for distributed I/O modules with strict space and thermal budgets.
When designing with this ADC, always bypass VA and VD with 10 µF and 0.1 µF ceramic capacitors placed within 5 mm of the supply pins, and use a low-impedance reference such as the TI REF3040 to avoid code-dependent gain error.
This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance that complements the manufacturer datasheet.
جایگزین‌های drop-in برای ADC108S022CIMT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ADC108S022CIMT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در RoHS Status.
ADC108S022CIMT/NOPB
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADC108S022CIMTX/NOPB
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADC108S052CIMT/NOPB
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADC108S102CIMT/NOPB
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADC084S101CIMMX
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ADC108S022CIMT حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 10 bit |
| Number of Channels | 8 |
| Architecture | SAR |
| Conversion Rate | 50 kSPS to 200 kSPS |
| Input Type | Single-ended |
| Supply Voltage (Analog/Digital) | 2.7 V to 5.25 V |
| ولتاژ مرجع | External, up to VA |
| Power Consumption | 1.5 mW typical at 3 V / 200 kSPS |
| Digital Interface | SPI / QSPI / MICROWIRE-compatible |
| دمای کاری | -40 °C to +105 °C |
| بسته‌بندی | 16-pin TSSOP |
| نوع نصب | Surface Mount |
| سطح MSL | 1 (unlimited) |
| وضعیت RoHS | Compliant (NOPB variant) |
| Throughput Range | 50 kSPS to 200 kSPS |
پیکربندی پین ADC108S022CIMT
| پین 1 | CH0 — Analog input channel 0 |
| پین 2 | CH1 — Analog input channel 1 |
| پین 3 | CH2 — Analog input channel 2 |
| پین 4 | CH3 — Analog input channel 3 |
| پین 5 | VA — Analog supply voltage |
| پین 6 | CH4 — Analog input channel 4 |
| پین 7 | REF — Voltage reference input |
| پین 8 | AGND — Analog ground |
| پین 9 | DGND — Digital ground |
| پین 10 | VD — Digital supply voltage |
| پین 11 | CS — Chip select (active low) |
| پین 12 | SDO — Serial data out |
| پین 13 | SCLK — Serial clock input |
| پین 14 | SDI — Serial data in (channel select) |
| پین 15 | CH5 — Analog input channel 5 |
| پین 16 | CH6/CH7 — Analog input channels 6 and 7 (multiplexed) |
کاربردهای معمول
ADC108S022CIMT مناسب است برای 6 کاربردs: Industrial PLC Analog Input Module, Portable Battery Management System, HVAC Environmental Sensor Array, Consumer White-Goods Control Board, Multi-Channel Data Acquisition Front-End, Medical Vital Signs Monitor (Auxiliary Channels).
Industrial PLC Analog Input Module
The ADC108S022CIMT's 8 single-ended channels and 50-200 kSPS throughput let a PLC analog-input card scan up to eight 0-10 V or 4-20 mA-conditioned signals without an external MUX. Its 16-pin TSSOP footprint keeps the BOM small for DIN-rail modules, and the SPI interface connects directly to most industrial MCUs. Power dissipation of 1.5 mW at 3 V/200 kSPS simplifies thermal design in sealed enclosures.
پیشنهادی
Portable Battery Management System
In a portable BMS, the ADC108S022CIMT monitors individual cell voltages, pack current shunt voltage, and temperature-divider rails on eight single-ended channels. Its 2.7-5.25 V supply matches single-cell Li-ion rails, and 1.5 mW typical power preserves battery life. The SAR core's deterministic latency lets the BMS host MCU trigger samples synchronously with current-pulse events.
پیشنهادی
HVAC Environmental Sensor Array
The ADC108S022CIMT digitizes multiple temperature, humidity, and pressure transducer outputs in HVAC controllers. Eight single-ended channels comfortably handle mixed sensor arrays, while the 50-200 kSPS throughput allows oversampling for noise reduction on slow-changing environmental signals. The industrial -40 °C to +105 °C range matches rooftop-unit thermal profiles.
پیشنهادی
Consumer White-Goods Control Board
Washing machines, ovens, and refrigerators use the ADC108S022CIMT to read water level, NTC temperature, motor current sense, and user-potentiometer inputs. Its low cost and small 16-pin TSSOP package suit consumer BOM targets, while the 10-bit resolution is sufficient for thermostat-class control loops. The 2.7-5.25 V range covers both 3.3 V and 5 V MCU rails used in white-goods designs.
پیشنهادی
Multi-Channel Data Acquisition Front-End
Bench-top and rack-mount DAQ systems leverage the ADC108S022CIMT for sub-200 kSPS scanning of multiple analog inputs in parallel with higher-speed dedicated ADCs. The SAR core provides deterministic timing for time-multiplexed scanning. Combined with an external TI REF3040 reference, the design achieves low code-dependent gain error in instrumentation-class applications.
پیشنهادی
Medical Vital Signs Monitor (Auxiliary Channels)
In multi-parameter patient monitors the ADC108S022CIMT handles auxiliary channels such as respiration belt, auxiliary temperature, and SpO2 reference voltages, freeing the primary ADC for ECG. The 10-bit resolution is sufficient for these slow channels, and the SPI host interface simplifies connection to the monitor's main MCU. The industrial temperature grade supports clinical-environment operating ranges.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ADC108S022CIMT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ADC108S022CIMT/NOPB | ADC108S052CIMT/NOPB | ADC108S102CIMT/NOPB | ADC084S101CIMMX |
|---|---|---|---|---|---|
| Package | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 10-pin MSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10 bit | 10 bit | 10 bit | 12 bit | 8 bit |
| Channels | 8 | 8 | 8 | 8 | 4 |
| Max Throughput | 200 kSPS | 200 kSPS | 500 kSPS | 1000 kSPS | 1000 kSPS |
| 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 | 2.7 V to 5.25 V |
| Interface | SPI | SPI | SPI | SPI | SPI |
| RoHS Compliance | Base part (check suffix) | Compliant | Compliant | Compliant | Compliant |
تفاوت‌های کلیدی
- Higher throughput at the same 16-pin TSSOP footprint (در مقابلADC108S052CIMT/NOPB)
- Drop-in upgrade path to 12-bit resolution (در مقابلADC108S102CIMT/NOPB)
- Eight single-ended channels in a small TSSOP-16 package (در مقابلADC084S101CIMMX)
یادداشت‌های طراحی
Bypass VA and VD each with a 10 µF tantalum or ceramic bulk capacitor plus a 0.1 µF ceramic placed within 5 mm of the IC pins. The analog and digital grounds should be tied at a single star point under the IC, per the TI reference schematic. Estimated: at VA = 5 V, 200 kSPS throughput, the ADC108S022CIMT draws approximately 3-4 mW from VA. Reference: TI ADC108S022 datasheet.
Route analog input traces differentially where possible and avoid routing digital lines (SCLK, SDO) parallel to analog channels to minimize digital crosstalk. Place the REF3040 reference within 25 mm of the REF pin, with the reference capacitor (1-10 µF) close to the ADC. Reference: TI ADC108S022 datasheet layout section.
Do not drive any analog input (CH0-CH7) above VA or below AGND - the ESD diodes will forward-bias and corrupt the conversion. Ensure VREF does not exceed VA. CS must be asserted low before SCLK transitions. Channel-tag bits in the SDI frame must be valid on the first rising SCLK edge after CS falls. Reference: TI ADC108S022 datasheet digital-interface timing diagram.
اطلاعات انطباق
Base ADC108S022CIMT (without /NOPB) is not RoHS - use /NOPB suffix variant for RoHS compliance per TI ordering information. Not AEC-Q100 qualified - this part targets industrial/consumer markets, not automotive.