ADC141S625CIMM/NOPB - 14-Bit 50-200kSPS 1-Ch ADC | Texas Instruments
MPN: ADC141S625CIMM/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.18 | $5.18 |
| 10 | $4.62 | $46.20 |
| 100 | $3.74 | $374.00 |
| 500 | $3.21 | $1,605.00 |
| 1,000 | $2.85 | $2,850.00 |
| 3,000 | $2.49 | $7,470.00 |
ADC141S625CIMM/NOPB Overview
A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm across an internal capacitive DAC to digitize an input voltage in one conversion cycle per code, delivering deterministic latency and excellent DC accuracy without pipeline delay. SAR ADCs sit one rung below pipeline ADCs in speed but well above integrating and delta-sigma types in instantaneous bandwidth, making them the workhorse for multiplexed data-acquisition systems, precision instrumentation, and battery-powered sensor front ends.
The ADC141S625CIMM/NOPB specifies true-differential or single-ended inputs, an external reference (typically driven by a low-noise LDO), and very low power consumption on the order of a few milliwatts at full throughput. The serial data interface reduces pin count to eight, which combined with the miniature MSOP-8 footprint allows dense board layouts in portable medical, sensor-module, and industrial-monitoring designs.
Typical applications include portable instrumentation, temperature and bridge sensor signal chains, battery management telemetry, process-control analog input modules, and consumer audio metering. The wide operating range also makes it suitable for handheld test equipment where the combination of 14-bit resolution and sub-mW standby current is highly valued.
When designing with this device, allocate adequate settling time for the input RC network and ensure the external reference is properly buffered - reference noise directly converts to output-code noise. Decouple AVDD with a 10 uF tantalum plus 0.1 uF ceramic pair placed within 5 mm of the supply pin.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ADC141S625CIMM/NOPB — 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 ADC141S625CIMM/NOPB (same form factor and footprint) — differing in Package, Resolution, Operating Temperature, RoHS Status, Input Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC141S626CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC121S705CIMMX
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →ADC122S101CIMM
✅ Drop-In✓ In Stock
$1.96 / Unit
View Datasheet →ADS7250IRTER
✅ Drop-In📋 Reference alternative (not in catalog)
AD7266BCPZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADC141S625CIMM/NOPB Maximum Ratings & Electrical Characteristics
| Resolution | 14 bit |
| Number of Channels | 1 |
| Sampling Rate | 50 kSPS to 200 kSPS |
| Architecture | SAR (Successive Approximation Register) |
| Data Interface | Serial (SPI/QSPI/MICROWIRE-compatible) |
| Input Type | Single-ended / Differential |
| Reference Type | External |
| Configuration | S/H-ADC |
| Number of A/D Converters | 1 |
| Package | 8-VSSOP (MSOP-8) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C |
| RoHS Status | Compliant (Pb-free finish, /NOPB suffix) |
ADC141S625CIMM/NOPB Pin Configuration
| Pin 1 | AIN+ / VIN+ — Analog positive input (or single-ended input) |
| Pin 2 | AIN- / VIN- — Analog negative input (tied to GND for single-ended) |
| Pin 3 | GND — Ground (analog and digital ground tie-point) |
| Pin 4 | REF — External voltage reference input |
| Pin 5 | AVDD — Analog supply voltage |
| Pin 6 | CS — Chip-select (active low, serial interface enable) |
| Pin 7 | SCLK — Serial clock input |
| Pin 8 | DOUT — Serial data output (SPI MOSI from ADC) |
Typical Applications
ADC141S625CIMM/NOPB is suitable for 6 applications: Portable Sensor Signal Chain, Process Control Analog Input Module, Battery Management Telemetry, Handheld Test and Measurement, Medical Monitoring Wearable, Audio Level Metering and VU Monitoring.
Portable Sensor Signal Chain
The ADC141S625CIMM/NOPB suits battery-powered sensor read-out boards that digitize bridge, thermocouple, or RTD outputs. Its SAR architecture delivers one deterministic conversion per cycle, eliminating pipeline-delay artifacts that complicate PID-style control loops. With 14-bit resolution and 200 kSPS throughput, the part resolves sub-mV thermocouple gradients while staying below the milliwatt power budget demanded by handheld instruments. Place the IC within 5 mm of the sensor, drive its REF pin with a REF3140-class low-noise LDO, and bypass AVDD with a 10 uF + 0.1 uF pair. Companion parts include OPA2333 op-amps for input buffering and the REF3140 reference for 14-bit DC accuracy.
Recommended
Process Control Analog Input Module
In industrial PLC analog input modules, the ADC141S625CIMM/NOPB digitizes 4-20 mA loop-derived voltages across 8 or 16 channels using an external multiplexer. Its serial SPI output saves board space versus parallel-output ADCs and supports isolation with a single digital isolator, reducing BOM cost. The 200 kSPS maximum throughput comfortably handles multiplexed scans of 8 channels at 25 kSPS each with margin for settling time. The /NOPB Pb-free finish and -40C to +85C industrial range suit factory-floor deployment. Companion parts include the ISO7241 digital isolator and the INA240 current-sense amplifier.
Recommended
Battery Management Telemetry
Battery management systems in e-bikes, power tools, and UPS stacks use the ADC141S625CIMM/NOPB to digitize individual cell voltages and pack current with high DC accuracy. The 14-bit resolution maps a 4.2V Li-ion cell to 0.256 mV LSB, well below the 5 mV balance threshold required for accurate state-of-charge estimation. The SAR architecture delivers instantaneous conversions, eliminating the group-delay of delta-sigma ADCs that complicates coulomb-counting corrections. The MSOP-8 footprint allows cell-monitoring PCBs to be placed directly at each cell, minimizing ground-loop errors. Companion parts include the BQ76952 battery monitor and the TPS7A4001 LDO for AVCC supply.
Recommended
Handheld Test and Measurement
Handheld multimeters, oscilloscope probes, and insulation testers rely on the ADC141S625CIMM/NOPB to digitize precision measurements where every millivolt and milliwatt counts. The 14-bit resolution with no missing codes across the -40C to +85C industrial range provides the linearity needed for calibrated TRMS readings, while the sub-mW standby current extends battery life in field-portable enclosures. The compact 8-VSSOP package leaves board area for OLED displays, BLE modules, and isolated USB interfaces. Companion parts include the ADS131A04 delta-sigma backup ADC and the CC2640 BLE MCU for wireless data export.
Recommended
Medical Monitoring Wearable
Wearable medical devices such as continuous glucose monitors, pulse oximeters, and ECG patches use the ADC141S625CIMM/NOPB to digitize biosignals with low power and high DC accuracy. The 14-bit resolution is sufficient for heart-rate and SpO2 front ends where the signal bandwidth is below 100 Hz, while the SAR architecture avoids the latency of delta-sigma converters that can distort pulse-edge timing. The MSOP-8 footprint and Pb-free finish suit skin-contact PCBs assembled to ISO 13485 quality systems. Companion parts include the AFE4400 pulse-ox front end and the TPS7A02 nanopower LDO for coin-cell operation.
Recommended
Audio Level Metering and VU Monitoring
Professional audio mixing consoles and broadcast equipment use the ADC141S625CIMM/NOPB for VU metering and peak-detection channels where 14-bit resolution is more than adequate for -40 to +6 dBu range mapping. The 200 kSPS throughput captures transient peaks without aliasing, while the SPI interface allows direct connection to DSPs such as the TMS320C5517 for level metering. The 8-VSSOP package allows dense channel layouts in 1U rack equipment where dozens of metering channels share a single backplane. Companion parts include the PCM1864 audio ADC for main channels and the OPA1612 audio op-amp for input buffering.
Recommended
Recommended Products Summary
Engineering reference data for ADC141S625CIMM/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC141S626CIMM/NOPB | ADC121S705CIMMX | ADC122S101CIMM | ADS7250IRTER | AD7266BCPZ |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 8-VSSOP (MSOP-8) | 8-VSSOP (MSOP-8) | 8-MSOP | 8-VSSOP (MSOP-8) | 8-VSSOP (MSOP-8) | 8-LFCSP (functionally 8-lead) |
| Resolution | 14 bit | 14 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 200 kSPS max | 500 kSPS | 500 kSPS | 1 MSPS | 1 MSPS | 2 MSPS |
| Channels | 1 | 1 | 1 | 2 | 2 | 2 |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI | SPI | SPI |
| Reference Type | External | External | External | External | External | External |
| Unit Price (1k) | USD 2.85 | USD ~3.50 | USD ~2.20 | USD ~2.40 | USD ~3.10 | USD ~6.80 |
Key Differentiators
- 14-bit resolution at sub-mW power (vs ADC121S705CIMMX)
- 50-200 kSPS software-selectable throughput (vs ADC141S626CIMM/NOPB)
- True-differential input MUX (vs ADS7250IRTER)
- Drop-in 8-VSSOP footprint (vs AD7266BCPZ)
Design Notes
Place the 10 uF tantalum and 0.1 uF ceramic decoupling pair within 5 mm of the AVDD pin, with the ceramic closer to the IC. Keep digital traces (CS, SCLK, DOUT) routed away from AIN+/- traces to avoid digital-noise coupling into the analog input. Use a ground plane on layer 2 with a single tie-point to the GND pin to minimize ground-loop noise.
The AIN+/- input presents a switched-capacitor load during acquisition - drive it with a low-output-impedance buffer (such as the OPA2333) and add a 10 nF to 100 nF hold capacitor on the input to provide instantaneous charge during the aperture window. Reference noise from the REF pin converts directly to output-code noise, so use a low-noise LDO such as REF3140 rather than a shared digital supply.
Do not float CS - tie it high through a 100 kohm pull-up or drive it directly from the host MCU. Failing to fully reset the serial interface between conversions can lock the part; always toggle CS high for at least one SCLK cycle after each read sequence. Avoid applying analog input voltages before AVDD is stable - the absolute-maximum table specifies AVDD + 0.3V as the limit, and exceeding this latches up the input ESD structure.
Estimated: at AVDD = 5V and 200 kSPS continuous sampling, the ADC141S625CIMM/NOPB draws approximately 1.5 mA active current (per datasheet typical characteristic). Power dissipation is therefore 7.5 mW, well below the VSSOP-8 thermal limit of approximately 250 mW at 25C ambient. No heatsink or copper-pour thermal management is required.
Compliance Information
/NOPB suffix explicitly designates Pb-free RoHS-compliant finish per TI material declaration. AEC-Q100 not qualified - consider automotive-grade TI ADC for vehicle applications. REACH SVHC compliance stated on TI product page.
