ADC104S021CIMMX - 10-Bit 200kSPS 4-Ch SAR ADC | TI
MPN: ADC104S021CIMMX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.61 | $261.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.84 | $1,840.00 |
ADC104S021CIMMX Overview
A SAR ADC is a type of data converter that uses a binary-search algorithm and an internal capacitive DAC to digitize an analog input in N successive approximation steps (one per output bit). SAR ADCs sit in the data-converter hierarchy below pipelined and delta-sigma ADCs, and are preferred for multi-channel multiplexed systems that need deterministic latency, small latency variation between channels, and true simultaneous-track-and-hold behavior across the input mux.
Key specifications include 4 single-ended input channels selected by an internal sequencer, a sample-rate range of 50 kSPS to 200 kSPS, and an analog supply range of +2.7V to +5.25V. The serial output data is straight binary and is compatible with SPI, QSPI, MICROWIRE, and most common DSP serial interfaces, requiring only three digital lines (CS, SCLK, DOUT).
The architecture combines a 4-to-1 analog input mux, a low-impedance sample-and-hold, the SAR engine, and an internal reference path that operates directly from VA without needing an external reference. Power-down modes reduce dissipation to microamp levels between conversions, which is critical for battery-powered and power-cycled sensor nodes.
Typical applications include portable multi-sensor data loggers, industrial process-control front-ends, optical-module monitor inputs (temperature/laser-bias monitoring in QSFP/SFP transceivers), motor-control feedback rails, and consumer handheld instruments. The wide 2.7V-5.25V supply tolerance lets a single ADC directly digitize both 3.3V and 5V sensor outputs without level translation.
When designing with this ADC, keep analog and digital grounds joined at a single star point near the AGND pin and decouple VA with a 1 uF ceramic plus a 0.1 uF X7R placed within 5 mm of the supply pin; SCLK must be clean and free of ringing, and CS must not remain low indefinitely.
This page synthesizes distributor stock/price data, drop-in alternatives in the same MSOP-10 footprint, and practical design notes not found in the standalone datasheet to help engineers select, source, and lay out the ADC104S021CIMMX in production BOMs.
Drop-in alternatives for ADC104S021CIMMX — 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 ADC104S021CIMMX (same form factor and footprint) — differing in Operating Temperature, Package, Resolution, Architecture, Input Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC104S021CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC104S021QIMMX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC104S021CIMMX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC084S021CIMMX
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.6 / Unit
View Datasheet →ADC102S021CIMMX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC101S021CISDX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC102S101CIMMX/NOPB
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ADC104S021CIMMX Maximum Ratings & Electrical Characteristics
| Resolution | 10 bits |
| Number of Input Channels | 4 single-ended |
| ADC Architecture | SAR (Successive Approximation Register) |
| Sample Rate Range | 50 kSPS to 200 kSPS |
| Analog Supply Voltage (VA) | 2.7 V to 5.25 V |
| Digital Supply Voltage (VD) | 2.7 V to 5.25 V |
| Power Consumption (VA=3V, 3V supply) | 1.94 mW typical |
| Power Consumption (VA=5V, 5V supply) | 6.9 mW typical |
| Input Voltage Range | 0 V to VA |
| Serial Interface | SPI / QSPI / MICROWIRE / DSP-compatible |
| Output Data Format | Straight binary |
| Reference | Internal (uses VA as reference) |
| Operating Temperature | -40 C to +85 C |
| Package | 10-pin MSOP / VSSOP (DGS) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADC104S021CIMMX Pin Configuration
| Pin 1 | VA — Analog supply input (2.7V to 5.25V); also serves as full-scale reference for the ADC. |
| Pin 2 | CH0 — Analog input channel 0 (single-ended, 0 V to VA). |
| Pin 3 | CH1 — Analog input channel 1 (single-ended, 0 V to VA). |
| Pin 4 | CH2 — Analog input channel 2 (single-ended, 0 V to VA). |
| Pin 5 | CH3 — Analog input channel 3 (single-ended, 0 V to VA). |
| Pin 6 | GND — Common ground reference for analog and digital sections; tie to a single ground star point on the PCB. |
| Pin 7 | DOUT — Serial data output; straight-binary, MSB-first, transitions on the falling edge of SCLK. |
| Pin 8 | SCLK — Serial clock input; clocks data out of DOUT when CS is asserted low. |
| Pin 9 | CS — Chip-select input (active-low); a high level disables the serial interface and powers down the SAR core. |
| Pin 10 | VD — Digital supply input (2.7V to 5.25V); can be tied to VA in single-rail designs. |
Typical Applications
ADC104S021CIMMX is suitable for 6 applications: Multi-Sensor Industrial Data Logger, QSFP/SFP Optical Module DOM Monitoring, Portable Battery-Powered Handheld Meter, BLDC Motor Control Feedback Rails, Consumer Appliance Sensor Front-End, Process-Control Analog Input Module.
Multi-Sensor Industrial Data Logger
The ADC104S021CIMMX is well suited to multi-sensor industrial data loggers that need to digitize four analog channels at moderate rates. With four single-ended input channels, an internal 4-to-1 mux, and up to 200 kSPS aggregate throughput, the part can scan up to four thermocouple/4-20 mA-conditioned sensor outputs from a single 3 mm x 3 mm MSOP-10 footprint. Its 1.94 mW typical dissipation at 3V supply enables battery or energy-harvest powered field loggers, and the SPI-compatible serial interface lets the data logger MCU (such as an MSP430 or low-end STM32) read all four channels with only three GPIO pins, leaving the remaining GPIOs free for SD-card, RTC, or wireless-radio control. Estimated: per-channel throughput in round-robin mode = 200 kSPS / 4 = 50 kSPS, which is plenty for thermal and pressure monitoring loops at sub-second update rates.
Recommended
QSFP/SFP Optical Module DOM Monitoring
The ADC104S021CIMMX fits QSFP and SFP optical-module digital-optical-monitoring (DOM) front-ends that must simultaneously read Tx bias current, Tx optical power, Rx optical power, and case temperature. With four single-ended channels, 200 kSPS sample rate, and a 2.7V-5.25V supply tolerance, the ADC can digitize the four photodiode-conditioned signals directly from the module's 3.3V rail. The straight-binary SPI output is compatible with the module's SERDES/host microcontroller without translation, and the small MSOP-10 footprint fits the tight module interior. Estimated: at 50 kSPS per channel (round-robin of four channels), each DOM variable is sampled at least every 80 us, well within the 1-second polling interval typical of SFF-8472 DOM telemetry.
Recommended
Portable Battery-Powered Handheld Meter
The ADC104S021CIMMX suits battery-powered handheld meters and DMMs that need to digitize several signal paths (voltage, current, temperature, and a reference channel for ratiometric correction). At 1.94 mW typical from a 3V supply plus the microamp-level power-down mode, the ADC contributes negligible current to a CR2032 or 2x AA powered design. Its small MSOP-10 footprint leaves board area for the LCD, key matrix, and boost regulator; the SPI interface simplifies link to the host MCU without bus isolation. Estimated: at 1 sample per second across all four channels, average ADC supply current drops below 50 uA, extending battery life by weeks compared to a continuously-sampling 12-bit ADC.
Recommended
BLDC Motor Control Feedback Rails
The ADC104S021CIMMX is appropriate for digitizing the analog feedback rails in a brushless-DC motor control loop: DC-bus current, phase-leg voltage, and two thermistor inputs (MOSFET and motor winding). With four single-ended channels and 200 kSPS aggregate, the part can be scanned by the motor-control MCU (such as a C2000 or low-end STM32) at PWM cycle rates up to 25 kHz per channel when round-robin dividing the four channels. The straight-binary SPI output and 2.7V-5.25V tolerance let the same part handle both 3.3V MCU and 5V gate-driver-sense signals without level translation. Estimated: with 4 channels at 50 kSPS each and a 50 ns conversion latency, the loop-back delay is well under one PWM period at 20 kHz switching frequency, suitable for FOC commutation loops.
Recommended
Consumer Appliance Sensor Front-End
The ADC104S021CIMMX is well matched to consumer appliance controllers (washing machines, dishwashers, refrigerators, ovens) that must read several analog sensors: water temperature, motor RPM feedback, door-latch microswitch voltage, and user-knob position. With four single-ended channels, 2.7V-5.25V supply range, and 200 kSPS, the ADC simultaneously captures slowly-changing analog inputs that share a single host-MCU SPI bus. Its MSOP-10 3 mm x 3 mm footprint fits even tight white-goods control boards, and the low 1.94 mW / 3V dissipation suits always-on appliances that must meet 0.5 W standby regulations. Estimated: scanning four inputs every 10 ms (100 Hz per channel) satisfies typical appliance sensor-bandwidth needs while leaving > 99 percent CPU bandwidth for the host MCU.
Recommended
Process-Control Analog Input Module
The ADC104S021CIMMX fits 4-20 mA / 0-10 V analog input modules used in factory process-control PLCs. Its four single-ended channels can each be paired with a front-end resistor network to convert 4-20 mA loops or 0-10 V process signals into 0-VA full-scale at the ADC inputs, and a 200 kSPS sample rate supports per-channel update rates of 50 kSPS in round-robin mode. The SPI/QSPI/MICROWIRE-compatible serial output simplifies digital isolation: place the ADC104S021CIMMX on the field side of a digital isolator and clock through a 4-wire SPI bridge on the logic side. Estimated: with 16-bit over-sampling and noise averaging at the host, effective resolution can be extended to roughly 12 noise-free bits without changing the silicon.
Recommended
Recommended Products Summary
Engineering reference data for ADC104S021CIMMX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC104S021CIMM/NOPB | ADC104S021QIMMX/NOPB | ADC104S021CIMMX/NOPB | ADC084S021CIMMX | ADC102S021CIMMX/NOPB |
|---|---|---|---|---|---|---|
| Package | MSOP-10 (DGS) | MSOP-10 (DGS) - same | MSOP-10 (DGS) - same | MSOP-10 (DGS) - same | MSOP-10 (DGS) - same | MSOP-10 (DGS) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits | 8 bits | 10 bits |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 2 |
| Sample Rate (max) | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Automotive Grade (AEC-Q100) | No | No | Yes | No | No | No |
| RoHS / Lead-Free | RoHS / Yes | RoHS / Yes | RoHS / Yes | RoHS / Yes | RoHS / Yes | RoHS / Yes |
Key Differentiators
- Lowest-power 4-channel SAR ADC in MSOP-10 (vs ADC082S021 family)
- Pin-compatible upgrade/down-grade within TI family (vs ADC084S021CIMMX (8-bit) and ADC102S021 (12-bit))
- Internal VA-as-reference simplifies BOM (vs External-reference SAR ADCs (e.g., AD7920))
- Automotive-grade variant available in same footprint (vs ADC104S021QIMMX/NOPB)
Design Notes
Place a 0.1 uF X7R ceramic decoupling capacitor as close as possible (within 5 mm) to the VA pin (pin 1), and add a 1 uF to 10 uF bulk capacitor on the same VA trace to handle SAR core switching transients. Repeat the same bypass scheme on the VD pin (pin 10) to keep digital switching noise out of the analog ground. Both VA and VD can be tied to the same rail in single-supply designs.
Route the analog input traces (CH0-CH3) symmetrically and well away from DOUT, SCLK, and CS digital traces to minimize digital-to-analog crosstalk. Use a single ground star connection at the GND pin (pin 6) rather than daisy-chaining multiple grounds into the device; a ground plane with the AGND pin stitched only at this single point is recommended. The exposed thermal pad is not present on this MSOP-10 package - all thermal dissipation occurs through the eight active pins and the package paddle-less leadframe.
Keep SCLK as clean as possible: avoid routing it across split-plane regions or near noisy switching nodes. If the host MCU and the ADC are on separate boards connected by a cable, add a 33 ohm series resistor near the ADC's SCLK pin to damp reflections, and a 10 kohm pull-up on CS to keep the ADC powered-down when the bus is idle. CS must not be left low during long idle periods because the SAR engine continues to consume power; always return CS high between conversions for power savings.
Estimated: when VA doubles as the ADC reference, low ripple on VA directly affects ADC accuracy. Powering VA from a noisy switching regulator can introduce 1-2 LSB of periodic noise into the conversion result - use a low-dropout linear regulator (such as the TPS7A45 or similar) at the ADC supply pin, especially when sampling low-amplitude sensor signals below 100 mV full scale. Also confirm that the analog input CHx voltage never exceeds VA (pin 1) by more than 0.3 V or goes below GND by more than 0.3 V; over-voltage input clamps exist but sustained over-voltage can degrade linearity.
Compliance Information
RoHS compliant and lead-free per Texas Instruments product page and DigiKey listing. Not AEC-Q100 qualified; select the Q-suffix ADC104S021QIMMX/NOPB variant for automotive designs. Halogen-free status not explicitly stated in the verified data; halogen_free shown as 'unknown'.
