ADC141S625CIMMX/NOPB - 14-Bit 50-250kSPS Differential ADC | TI
MPN: ADC141S625CIMMX/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.1 | $4,100.00 |
ADC141S625CIMMX/NOPB Overview
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that samples continuous-time, continuous-amplitude analog signals and converts them into discrete digital codes. Successive-approximation-register (SAR) ADCs like the ADC141S625 use a binary-search algorithm through an internal DAC to converge on the input voltage within N conversion cycles, producing N-bit resolution. The ADC141S625 sits at the bottom of the precision converter hierarchy: SAR ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features include 14-bit resolution with no missing codes, true-differential input for excellent common-mode noise rejection, a low-power architecture drawing micro-amps in shutdown, an external reference input for system-level flexibility, and a small-footprint VSSOP-8 (DGK) package. The wide input voltage range combined with differential sampling makes the part tolerant of ground-loop noise in industrial sensor interfaces.
Typical applications include precision sensor signal chains (load cells, strain gauges, RTD bridges), industrial process-control analog front ends, portable/battery-powered instrumentation, factory-automation modules, and medical monitoring front ends. The differential input simplifies direct bridge-digitization, eliminating instrumentation amplifiers in many designs.
When designing with this part, pair the ADC with an external low-noise reference and provide adequate input protection (ESD diodes, RC anti-aliasing filters sized below half the Nyquist rate). Note that this part carries the /NOPB suffix indicating lead-free, Pb-free matte-tin finish and is RoHS compliant.
Drop-in alternatives for ADC141S625CIMMX/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 ADC141S625CIMMX/NOPB (same form factor and footprint) — differing in Sampling Rate, Architecture, Number of Channels, Package, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC141S625CIMM/NOPB
✅ Drop-In✓ In Stock
$2.49 / Unit
View Datasheet →ADC141S625CIMMX
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ADC141S626CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC141S625CIMMX/NOPB Maximum Ratings & Electrical Characteristics
| Resolution | 14 bit |
| Number of Channels | 1 |
| Sampling Rate | 50 kSPS to 250 kSPS |
| Input Type | Differential |
| Architecture | SAR (Successive Approximation Register) |
| Data Interface | SPI / QSPI / MICROWIRE compatible serial |
| Package | 8-VSSOP (DGK) |
| Operating Temperature | -40C to +85C (industrial) |
| Reference Type | External |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| Lead-Free Finish | Yes (NOPB suffix - Pb-free matte tin) |
| Packaging | Tape & Reel (CIMMX = tape/reel, /NOPB = lead-free) |
ADC141S625CIMMX/NOPB Pin Configuration
| Pin 1 | VIN+ — Positive differential analog input |
| Pin 2 | VIN- — Negative differential analog input |
| Pin 3 | GND — Ground |
| Pin 4 | REF — External reference voltage input |
| Pin 5 | CS — Chip select (active low) for SPI interface |
| Pin 6 | SCLK — Serial clock input for SPI |
| Pin 7 | DOUT — Serial data output |
| Pin 8 | VDD — Positive supply voltage |
Typical Applications
ADC141S625CIMMX/NOPB is suitable for 7 applications: Precision Bridge Sensor Digitization, Industrial Process Control Analog Front End, Portable Battery-Powered Instrumentation, Medical Monitoring Equipment, Factory Automation Sensor Modules, Energy Monitoring and Smart Metering, Test and Measurement Equipment.
Precision Bridge Sensor Digitization
The ADC141S625's true-differential 14-bit input and 50-250 kSPS sampling rate make it ideal for direct digitization of bridge sensors including load cells, strain gauges, and pressure transducers. The differential input rejects common-mode noise from long sensor cable runs, eliminating the need for an external instrumentation amplifier. With 14-bit resolution (16384 codes), the converter provides sufficient dynamic range for weighing scales and force-measurement applications where sub-gram accuracy is required. The 8-VSSOP package fits compact PCB layouts inside sensor housings.
Recommended
Industrial Process Control Analog Front End
For industrial PLC analog input modules measuring 4-20 mA current loops or 0-10V voltage signals, the ADC141S625 provides 14-bit resolution at sample rates up to 250 kSPS. The SPI-compatible serial interface simplifies isolation barrier implementation with digital isolators, allowing the ADC to sit on the field side of the isolation boundary. Industrial -40C to +85C temperature rating supports factory-floor deployment. Differential sampling rejects motor drive noise common in factory automation cabinets.
Recommended
Portable Battery-Powered Instrumentation
The micro-power architecture of the ADC141S625 suits handheld multimeters, portable medical monitors, and battery-operated data loggers where every microamp matters. The SAR topology consumes power only during active conversion, allowing duty-cycled sampling to extend battery life. The 8-VSSOP footprint enables miniaturized PCB designs in handheld form factors. Differential inputs simplify thermocouple and RTD interfaces used in field-test instrumentation.
Recommended
Medical Monitoring Equipment
Medical monitoring devices such as patient vital-sign monitors and portable diagnostic equipment benefit from the ADC141S625's 14-bit precision and differential input for ECG, temperature, and SpO2 signal chains. The low-power consumption extends battery life in ambulatory monitors, while the small VSSOP package fits wrist-watch form factors. The external reference input allows the system designer to optimize noise performance per channel for medical-grade signal fidelity.
Recommended
Factory Automation Sensor Modules
Factory automation sensor modules measuring proximity, position, or process variables use the ADC141S625 to digitize analog sensor outputs at high sampling rates. The 250 kSPS maximum sample rate supports multi-channel time-multiplexed acquisition through external analog switches. The differential input simplifies direct connection to bridge-type position sensors and LVDT signal conditioning circuits. Industrial temperature rating ensures reliable operation in unconditioned factory environments.
Recommended
Energy Monitoring and Smart Metering
Smart electricity meters and energy-monitoring sub-systems use the ADC141S625 for digitizing current-sense and voltage-sense signals from shunt resistors and CTs. The 14-bit resolution and differential input support accurate power calculation across the dynamic range of household and industrial loads. The low power consumption suits always-on metering applications, while the small package allows integration into compact meter form factors. SPI interface simplifies connection to metering MCUs.
Recommended
Test and Measurement Equipment
Bench-top and portable test equipment benefit from the ADC141S625's 14-bit precision for digitizing sensor signals in laboratory and field-test setups. The differential input supports direct connection to differential probes and bridge sensors used in materials testing. Combined with an external precision reference, the ADC achieves the linearity required for calibrated test instruments. The 8-VSSOP package allows dense PCB layouts with multiple ADC instances for multi-channel data acquisition systems.
Recommended
Recommended Products Summary
Engineering reference data for ADC141S625CIMMX/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC141S625CIMM/NOPB | ADC141S625CIMMX | ADC141S626CIMM/NOPB |
|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 50-250 kSPS | 50-250 kSPS | 50-250 kSPS | 50-250 kSPS |
| Input Type | Differential | Differential | Differential | Differential |
| Shipping Format | Tape & Reel | Tube | Tape & Reel | Tube |
| Lead-Free (NOPB) | Yes | Yes | No | Yes |
| Architecture | SAR | SAR | SAR | SAR |
Key Differentiators
- Same-brand drop-in alternative available in non-NOPB finish (vs ADC141S625CIMMX)
- Sister part in the same family with similar performance (vs ADC141S626CIMM/NOPB)
- Tube packaging alternative available from same family (vs ADC141S625CIMM/NOPB)
Design Notes
The ADC141S625 requires a clean analog supply; place a 10uF tantalum bulk capacitor plus a 0.1uF ceramic bypass capacitor close to the VDD pin. For best noise performance, derive the ADC supply from a low-noise LDO (such as TPS7A47) rather than directly from a switching converter. Add a ferrite bead if the ADC must share a rail with digital logic to prevent digital switching noise from coupling into the analog input.
Keep analog input traces short and symmetric for the differential pair. Route the SPI digital lines (SCLK, DOUT, CS) away from the analog input traces to avoid digital coupling. Use a ground plane under the ADC with the analog and digital grounds star-connected at the ADC GND pin. Place the external reference capacitor immediately adjacent to the REF pin with a short, low-inductance trace.
Estimated: at 250 kSPS full-rate sampling, an anti-aliasing RC filter with fc at approximately 125 kHz (Nyquist) should be placed ahead of the analog input to prevent aliasing of out-of-band noise. Designers commonly omit the differential anti-aliasing filter and discover spurious codes in production testing. Verify the reference voltage source can supply the ADC reference current without droop at maximum sampling rate.
The differential input structure rejects common-mode noise up to the specified common-mode range; however, exceeding this range at the input pins will distort the conversion result or damage the input ESD structures. Add external clamping diodes if the input can exceed the supply rail during fault events. Maintain a stable common-mode voltage (typically VDD/2) at the input pins for maximum dynamic range.
Compliance Information
RoHS compliant per the /NOPB suffix designation. Lead-free matte-tin finish. Industrial -40C to +85C temperature rating; not AEC-Q100 qualified for automotive applications.
