ADC082S021CIMM - 8-Bit 200ksps 2-Ch SAR ADC | Texas Instruments
MPN: ADC082S021CIMM ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.52 | $2,520.00 |
ADC082S021CIMM Overview
An SAR ADC is a type of analog-to-digital converter that uses a successive-approximation register to perform binary search on the input voltage. SAR ADCs are valued for their low power, deterministic latency, and excellent dynamic performance at moderate resolutions. The ADC082S021 belongs to the broader hierarchy of data converter ICs (ADC/DAC) within the signal-chain semiconductor category, and as an 8-bit device it targets applications that do not require high resolution but do need low latency and small size.
Key features include an analog input bandwidth suitable for the 50–200 ksps range, a hardware-/SPI-compatible serial data output, an external SCLK input from 0.8 MHz to 3.2 MHz, and an industrial operating temperature range of -40°C to +85°C. The 8-pin VSSOP (DGK) package exposes one chip-select input and two analog input channels, plus the serial data output, SCLK, and supply pins. The simple digital interface requires only three digital lines (CS, SCLK, DOUT), which simplifies PCB routing in microcontroller- or DSP-based systems.
Typical applications include portable instrumentation, sensor signal acquisition, battery monitoring, consumer audio level meters, industrial process controls, and handheld meters. The wide 2.7V–5.25V supply range allows direct connection to 3.3V or 5V microcontrollers without level shifters. Because the SAR architecture has no pipeline delay, the part is also well-suited to closed-loop control loops where deterministic conversion latency matters.
When designing with this ADC, observe the analog input settling requirements and the source-impedance-driven acquisition time; use a low-impedance input buffer when the source impedance exceeds the datasheet limit. Decouple VA and VD with 0.1 µF and 10 µF capacitors placed as close as possible to the supply pins to keep digital switching currents out of the analog input path.
This page synthesizes the manufacturer datasheet parameters with distributor pricing, drop-in alternatives (including the active /NOPB and -X tape-and-reel variants), and practical design notes that are not collected in a single datasheet table.
Drop-in alternatives for ADC082S021CIMM — 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 ADC082S021CIMM (same form factor and footprint) — differing in Architecture, Input Voltage Range, Operating Temperature, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC082S021CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC082S021CIMMX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC082S021CIMM
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →ADC082S101CIMM
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →ADC081C021CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC082S021CIMM Maximum Ratings & Electrical Characteristics
| Resolution | 8 bit |
| Number of Channels | 2 |
| Architecture | Successive Approximation Register (SAR) |
| Sample Rate Range | 50 ksps to 200 ksps |
| Supply Voltage (VA, VD) | 2.7 V to 5.25 V (single supply) |
| Power Consumption (3V) | 1.6 mW (typical) |
| Power Consumption (5V) | 5.8 mW (typical) |
| Analog Input Type | Single-ended (2 channels) |
| Input Voltage Range | 0 V to VA |
| Digital Interface | SPI / QSPI / MICROWIRE / DSP-compatible serial |
| SCLK Frequency | 0.8 MHz to 3.2 MHz |
| Output Coding | Straight binary |
| Operating Temperature | -40 C to +85 C |
| Package | 8-VSSOP (DGK) |
| Mounting Type | Surface Mount |
| RoHS Status | Non-RoHS (lead-bearing base part) - see /NOPB |
ADC082S021CIMM Pin Configuration
| Pin 1 | VA — Analog supply voltage (2.7V to 5.25V) |
| Pin 2 | VD — Digital supply voltage (tied to VA typically) |
| Pin 3 | CH1 — Analog input channel 1 |
| Pin 4 | CH2 — Analog input channel 2 |
| Pin 5 | GND — Ground (0 V) |
| Pin 6 | DOUT — Serial data output (SPI / QSPI / MICROWIRE) |
| Pin 7 | SCLK — Serial clock input (0.8 MHz to 3.2 MHz) |
| Pin 8 | CS — Chip-select input (active low) |
Typical Applications
ADC082S021CIMM is suitable for 6 applications: Portable Battery-Powered Sensor Acquisition, Industrial Process Control Loop Sensing, Handheld Multimeter and DMM Front-End, Consumer Audio Level Metering, White-Goods and Appliance Sensor Hub, Automotive Accessory and Aftermarket Modules.
Portable Battery-Powered Sensor Acquisition
Why this part fits: The ADC082S021's 1.6 mW typical power at 3V supply and 2.7V–5.25V single-supply operation align with lithium-ion and 3.3V coin-cell designs where minimizing drain is critical. Two single-ended input channels allow simultaneous battery-voltage and current-sense or two-sensor sampling without an external MUX. The 200 ksps top sample rate is more than adequate for slow thermal, gas, and strain-gauge sensor chains. How it is used and performance consideration: Placed near the sensors with the SFP series driven directly from a low-power microcontroller SPI port; SCLK runs at 0.8–3.2 MHz and the SAR core completes a conversion in ~16 SCLK cycles with no pipeline delay, giving deterministic latency for closed-loop sampling. A 10 µF + 0.1 µF decoupling pair on VA/VD keeps digital switching noise out of the analog front-end.
Recommended
Industrial Process Control Loop Sensing
Why this part fits: Industrial 4–20 mA loops and 0–10V process signals typically map to 8-bit resolution after front-end conditioning, making the ADC082S021 a cost-effective two-channel monitor for both process variable and reference tracking. The -40 °C to +85 °C industrial temperature range and SPI/QSPI/MICROWIRE compatibility let it interface directly to PLC backplanes or industrial MCUs. How it is used and performance consideration: Each channel drives a SAR conversion on demand from the host MCU's CS pin, so two channels can be sampled in deterministic order with no pipeline latency - useful for synchronized readings in PID control. The wide 2.7V–5.25V supply tolerates 24V-to-5V LDO rails already present in industrial PLC hardware.
Recommended
Handheld Multimeter and DMM Front-End
Why this part fits: Handheld multimeters and clamp meters digitize voltage, current, and resistance readings with 8-bit to 1/2-bit resolution, exactly matching the ADC082S021. The 200 ksps sample rate allows fast autoranging and peak capture, while the 1.6 mW at 3V draw extends battery life in the field. The 8-VSSOP (DGK) package keeps the converter small enough to fit inside tight handheld enclosures. How it is used and performance consideration: Two channels support simultaneous voltage-plus-resistance or voltage-plus-current measurements; the SAR core settles in one conversion with no pipeline delay, so peak-hold and min/max displays update on every sample. The 8-VSSOP package simplifies PCB layout by placing the analog inputs adjacent to the front-end op-amps.
Recommended
Consumer Audio Level Metering
Why this part fits: Audio level metering in mixers, karaoke systems, and consumer amplifiers requires 8-bit resolution at audio bandwidth - well within the ADC082S021's 50–200 ksps envelope. Two channels support left/right level sensing from a single chip, and the 2.7V–5.25V supply is compatible with 3.3V and 5V audio CODEC rails. How it is used and performance consideration: Placed between the audio line-level stage and the host MCU, with the SFP series driven by SPI; the SAR architecture's deterministic latency keeps LED-bar updates synchronized to the audio waveform. A simple op-amp summer provides the AC-to-DC level signal before the ADC input.
Recommended
White-Goods and Appliance Sensor Hub
Why this part fits: Washing machines, dishwashers, and refrigerators monitor temperature, water level, and motor current with 8-bit resolution, exactly matching the ADC082S021CIMM's two-channel SAR architecture. The 2.7V–5.25V supply is compatible with 3.3V and 5V appliance MCUs, and the small 8-VSSOP (DGK) package fits the tight control-board layouts typical of white goods. How it is used and performance consideration: Each channel samples a different transducer (NTC thermistor, water-level sensor, motor current sense) under host control via SPI; the SAR core delivers a result in a deterministic number of SCLK cycles, allowing the appliance controller to multiplex reads without pipeline latency. Industrial -40 °C to +85 °C operation covers the appliance operating range.
Recommended
Automotive Accessory and Aftermarket Modules
Why this part fits: The ADC082S021's industrial -40 °C to +85 °C rating and 8-VSSOP footprint suit non-safety-critical aftermarket modules such as trip computers, gauge clusters, and tuning accessories that need two channels of 8-bit conversion. Two channels are sufficient for battery voltage plus throttle-position or RPM sensing in entry-level automotive accessories. How it is used and performance consideration: For safety-critical or AEC-Q100-qualified applications, use the AEC-Q100 version from the same TI SAR family rather than the ADC082S021; for non-safety automotive accessory designs, the SAR's deterministic latency and 200 ksps throughput give clean synchronized readings from both inputs. Decouple VA and VD with ceramic capacitors close to the package pins to suppress crank-transient noise on the 12V bus.
Recommended
Recommended Products Summary
Engineering reference data for ADC082S021CIMM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC082S021CIMM/NOPB | ADC082S021CIMMX/NOPB | ADC082S021CIMM | ADC082S101CIMM | ADC081C021CIMM/NOPB |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 10 bit | 8 bit |
| Channels | 2 | 2 | 2 | 2 | 2 | 1 |
| Digital Interface | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | I2C |
| 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 |
| Lifecycle Status | Obsolete | Active | Active | Obsolete (this part) | Active | Active |
| RoHS Compliance | Non-RoHS | RoHS compliant | RoHS compliant | Non-RoHS (this part) | Non-RoHS | RoHS compliant |
Key Differentiators
- Drop-in lead-free /NOPB alternative available on the same 8-VSSOP footprint (vs ADC082S021CIMM (obsolete base part))
- 10-bit resolution option on same footprint (vs ADC082S101CIMM)
- I2C-compatible variant available for single-channel systems (vs ADC081C021CIMM/NOPB)
Design Notes
Estimated: connect VA and VD to the same supply rail through separate traces and decouple each pin with a 0.1 µF ceramic capacitor in parallel with a 10 µF tantalum or ceramic bulk capacitor. Place the capacitors within 2–3 mm of the package pins. When VA and VD are tied to the same source, a ferrite bead between them prevents digital switching noise from coupling into the analog input path. According to TI datasheet (Rev. D), power consumption is 1.6 mW typical at 3V and 5.8 mW typical at 5V; supply current scales with sample rate.
Estimated: keep the analog input traces (CH1, CH2) short and routed away from SCLK, DOUT, and CS to minimize digital coupling. Place a ground pour under the ADC and stitch it with vias around the periphery. The exposed-pad of the 8-VSSOP (DGK) package is not internally connected - it can be soldered to the ground pour for thermal relief, but it does not need to be electrically tied to GND. When driving the analog inputs from a high-impedance source (>1 kΩ), add an input buffer op-amp so the acquisition time meets the SAR's settling requirement.
Do not exceed VA on CH1 or CH2 inputs - the analog input range is 0 V to VA. Do not leave CS floating; tie it high or low through a pull-up/pull-down to avoid spurious conversions. Ensure SCLK stays within the 0.8 MHz to 3.2 MHz datasheet range - SCLK outside this range leads to invalid conversion data. When replacing the obsolete ADC082S021CIMM with the active /NOPB variant, no firmware changes are required because the digital interface and register map are identical; only the BOM line and the board-marking differ.
Compliance Information
Base ADC082S021CIMM is lead-bearing and not RoHS compliant. Use ADC082S021CIMM/NOPB for RoHS-compliant designs. AEC-Q100 not applicable for the base part; check TI automotive-grade SAR family members if needed.
