ADC108S022CIMT - 8-Ch 10-Bit 50-200kSPS SAR ADC | Texas Instruments
MPN: ADC108S022CIMT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.65 | $46.50 |
| 100 | $4.1 | $410.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.05 | $3,050.00 |
ADC108S022CIMT Overview
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.
Drop-in alternatives for ADC108S022CIMT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADC108S022CIMT (same form factor and footprint) — differing in RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC108S022CIMT/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC108S022CIMTX/NOPB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC108S052CIMT/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC108S102CIMT/NOPB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC084S101CIMMX
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →ADC108S022CIMT Maximum Ratings & Electrical Characteristics
| Resolution | 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 |
| Reference Voltage | External, up to VA |
| Power Consumption | 1.5 mW typical at 3 V / 200 kSPS |
| Digital Interface | SPI / QSPI / MICROWIRE-compatible |
| Operating Temperature | -40 °C to +105 °C |
| Package | 16-pin TSSOP |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant (NOPB variant) |
| Throughput Range | 50 kSPS to 200 kSPS |
ADC108S022CIMT Pin Configuration
| Pin 1 | CH0 — Analog input channel 0 |
| Pin 2 | CH1 — Analog input channel 1 |
| Pin 3 | CH2 — Analog input channel 2 |
| Pin 4 | CH3 — Analog input channel 3 |
| Pin 5 | VA — Analog supply voltage |
| Pin 6 | CH4 — Analog input channel 4 |
| Pin 7 | REF — Voltage reference input |
| Pin 8 | AGND — Analog ground |
| Pin 9 | DGND — Digital ground |
| Pin 10 | VD — Digital supply voltage |
| Pin 11 | CS — Chip select (active low) |
| Pin 12 | SDO — Serial data out |
| Pin 13 | SCLK — Serial clock input |
| Pin 14 | SDI — Serial data in (channel select) |
| Pin 15 | CH5 — Analog input channel 5 |
| Pin 16 | CH6/CH7 — Analog input channels 6 and 7 (multiplexed) |
Typical Applications
ADC108S022CIMT is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for ADC108S022CIMT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Higher throughput at the same 16-pin TSSOP footprint (vs ADC108S052CIMT/NOPB)
- Drop-in upgrade path to 12-bit resolution (vs ADC108S102CIMT/NOPB)
- Eight single-ended channels in a small TSSOP-16 package (vs ADC084S101CIMMX)
Design Notes
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.
Compliance Information
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.