ADC10158CIWMX - 10-Bit+Sign 8-Ch 4µs SAR ADC | Texas Instruments
MPN: ADC10158CIWMX ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.4 | $44.00 |
| 100 | $3.95 | $395.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.2 | $3,200.00 |
ADC10158CIWMX Overview
An SAR ADC is a successive-approximation-register analog-to-digital converter that resolves one bit per clock cycle against an internal or external reference, producing accurate, low-latency conversions ideal for multiplexed data-acquisition front-ends. SAR ADCs sit within the data-converter hierarchy under ADC -> data converter -> mixed-signal IC, favored in industrial monitoring and instrumentation for their deterministic latency and absence of pipeline delay.
Key distinguishing features of the ADC10158 include 10-bit plus-sign resolution (allowing bipolar input swing with a sign bit), 8-channel MUX, integrated 2.5 V reference, low power consumption, and single +5 V supply operation. The sign-bit feature eliminates the need for input signal conditioning in bipolar applications and the on-chip reference simplifies bill-of-materials.
Architecturally, the device combines a capacitive-charge redistribution DAC with successive-approximation logic, a sample-and-hold, a configurable analog input MUX, and a 2.5 V band-gap reference. The parallel output interface and standard microprocessor control inputs simplify host connections without requiring a serial-programming state machine.
Typical applications include industrial process control, multi-channel data acquisition systems, battery-powered instrumentation, motor control feedback loops, and portable medical monitoring where multiple analog sensors share one converter. Pin-compatible same-family parts (ADC10158CIWM/NOPB and ADC10154 series) and function-similar 12-bit ADCs from TI extend design scalability without PCB rework.
One key design trade-off is that the 4 µs conversion time limits this part to sub-200 kHz sampling; for higher throughput, designers should consider pipelined ADCs such as ADC12040/ADC12L063, while keeping the same 28-SOIC footprint pattern in mind where PCB reuse is desired.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the TI datasheet narrative, giving a single decision-ready reference for engineers evaluating the ADC10158CIWMX for embedded data-acquisition designs.
Drop-in alternatives for ADC10158CIWMX — 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 ADC10158CIWMX (same form factor and footprint) — differing in Input Type, Number of Input Channels, Operating Temperature, Package, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC10158CIWM/NOPB
✅ Drop-In✓ In Stock
$10.4 / Unit
View Datasheet →ADC10158CIN/NOPB
✅ Drop-In✓ In Stock
$4.74 / Unit
View Datasheet →ADC10154CIWM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC10158CIWMX Maximum Ratings & Electrical Characteristics
| Resolution | 10-Bit + Sign |
| Number of Channels | 8 (single-ended/differential/pseudo-differential) |
| Architecture | Successive Approximation (SAR) |
| Sampling Rate (Max) | 166 ksamples/second |
| Conversion Time | 4 µs (typical) |
| Input Type | Single-ended, differential, pseudo-differential |
| Data Interface | Parallel |
| Reference | Internal 2.5 V band-gap (external optional) |
| Operating Temperature | -40 °C to +85 °C |
| Package / Case | 28-SOIC (0.295 inch / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Number of Functions | 1 converter |
| Process Technology | CMOS |
| RoHS Status | Compliant |
| Temperature Grade | Industrial |
ADC10158CIWMX 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 | CH4 — Analog input channel 4 |
| Pin 6 | CH5 — Analog input channel 5 |
| Pin 7 | CH6 — Analog input channel 6 |
| Pin 8 | CH7 — Analog input channel 7 |
| Pin 9 | AGND — Analog ground |
| Pin 10 | VREF — Reference voltage (2.5 V internal / external) |
| Pin 11 | D0 — Digital output bit 0 (LSB) |
| Pin 12 | D1 — Digital output bit 1 |
| Pin 13 | D2 — Digital output bit 2 |
| Pin 14 | D3 — Digital output bit 3 |
| Pin 15 | D4 — Digital output bit 4 |
| Pin 16 | D5 — Digital output bit 5 |
| Pin 17 | D6 — Digital output bit 6 |
| Pin 18 | D7 — Digital output bit 7 (MSB) |
| Pin 19 | SIGN — Sign bit output |
| Pin 20 | DGND — Digital ground |
| Pin 21 | CS — Chip select / read strobe |
| Pin 22 | RD — Read strobe |
| Pin 23 | WR — Write / start conversion |
| Pin 24 | MODE — Mode select (MUX configuration) |
| Pin 25 | DVCC — Digital +5 V supply |
| Pin 26 | AVCC — Analog +5 V supply |
| Pin 27 | CLK — Clock input |
| Pin 28 | EOC — End of conversion status |
Typical Applications
ADC10158CIWMX is suitable for 7 applications: Industrial Process Control Multi-Channel Monitoring, Multi-Sensor Data Acquisition Systems (DAQ), Motor Control Feedback and Current Sensing, Portable Medical Monitoring Equipment, Automotive Sensor Interface Modules, Battery-Powered Instrumentation, Test & Measurement Front-End Cards.
Industrial Process Control Multi-Channel Monitoring
The ADC10158CIWMX is a strong fit for industrial process control boards that must scan 4-8 sensors (temperature, pressure, flow) in sequence. Its integrated 8-channel MUX eliminates an external analog switch tree, reducing BOM and PCB area. The on-chip 2.5 V band-gap reference provides adequate absolute accuracy for 10-bit measurements at 5 V full scale, while the 4 µs conversion time supports sampling rates up to 166 kSPS - sufficient for control loops with kHz update rates. The parallel interface connects directly to microcontrollers or FPGAs, simplifying firmware. Across thermocouple, RTD, and 4-20 mA current-loop front-ends, the ADC10158's pseudo-differential mode rejects common-mode noise from long sensor cables typical of plant wiring.
Recommended
Multi-Sensor Data Acquisition Systems (DAQ)
Battery- and USB-powered DAQ modules benefit from the ADC10158CIWMX's combination of 8 multiplexed channels, integrated 2.5 V reference, and modest supply current. The 10-bit + sign resolution allows bipolar signal swing (e.g. ±5 V around virtual ground) without external level shifters - useful for strain-gauge bridges and AC-coupled transducer outputs. With 4 µs conversion and parallel output, the part can serve as the central converter for scan rates of 10-20 kHz aggregate, matching the bandwidth of vibration, acoustic, and seismic sensors. Designers can scale channel count by paralleling multiple ADC10158s, all clocked from a common start-conversion line.
Recommended
Motor Control Feedback and Current Sensing
Brushless DC and stepper motor controllers need to digitize phase currents, bus voltage, and back-EMF signals in real time. The ADC10158CIWMX's 4 µs conversion latency is short enough to be sampled within a typical 50-100 µs PWM cycle, while its 8-channel MUX lets a single converter handle a 3-phase current sense plus auxiliary telemetry channels. The internal 2.5 V reference provides adequate stability for 10-bit torque control, and the -40 to +85 °C range covers automotive under-hood and industrial cabinet environments. Pairing with current-sense amplifiers and isolated gate drivers gives a complete mixed-signal motor-control analog front end.
Recommended
Portable Medical Monitoring Equipment
Portable patient monitors (pulse oximetry, ECG, bedside telemetry) require low-power, multi-channel analog front ends. The ADC10158CIWMX can scan ECG lead-off detect, SpO2 photodiode current, temperature, and battery voltage with a single IC. Its integrated reference lowers total power and cost vs. an external reference chain, and the 10-bit + sign resolution is sufficient for diagnostic-grade displays where 12-bit dynamic range is more than required. The 28-SOIC package is manageable on small PCBs, and the industrial temperature range supports clinical environments. For battery operation, the parallel interface allows efficient burst-mode sampling followed by low-power sleep.
Recommended
Automotive Sensor Interface Modules
Automotive body and chassis modules need to digitize multiple analog sensors (pedal position, suspension travel, oil pressure). The ADC10158CIWMX's -40 to +85 °C industrial range and 28-SOIC footprint suit non-safety-critical body electronics. The 8-channel MUX handles multiple 0-5 V sensor inputs while the integrated 2.5 V reference simplifies the analog supply chain. For AEC-Q100-grade applications, however, an automotive-qualified ADC should be selected - the ADC10158 family is not AEC-Q100 qualified. Engineers can prototype with the ADC10158 and migrate to AEC-Q100 pin-compatibles later.
Recommended
Battery-Powered Instrumentation
Handheld multimeters, field data loggers, and portable test instruments benefit from the ADC10158CIWMX's single +5 V operation, integrated 2.5 V reference, and modest power consumption. The 8-channel MUX supports multi-function meters (voltage, current, resistance, temperature) without an external switch matrix. The 10-bit + sign resolution allows direct measurement of bipolar signals, useful when sensing current via a shunt (which produces a positive or negative drop depending on direction). The 28-SOIC's mechanical robustness suits hand-held equipment with vibration exposure.
Recommended
Test & Measurement Front-End Cards
Modular test instruments (PXI/LXI data-acquisition cards, benchtop loggers, switch-matrix systems) value channel density, deterministic conversion time, and parallel output that the ADC10158CIWMX provides. The 4 µs fixed conversion time ensures repeatable timing, easing calibration routines. Up to 8 single-ended inputs can be scanned in sequence for multi-channel test fixtures, and the parallel interface streams data directly into on-board FPGAs or microcontrollers without serial-protocol overhead. Designers can build scalable 16-/32-/64-channel cards by ganging ADC10158s with shared start-conversion logic.
Recommended
Recommended Products Summary
Engineering reference data for ADC10158CIWMX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC10158CIWM/NOPB | ADC10158CIN/NOPB | ADC10154CIWM |
|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC family (also available in 28-DIP) | 28-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 10-Bit + Sign | 10-Bit + Sign | 10-Bit + Sign | 10-Bit + Sign |
| Number of Channels | 8 | 8 | 8 | 4 |
| Sampling Rate (Max) | 166 kSPS | 166 kSPS | 166 kSPS | 166 kSPS |
| Conversion Time | 4 µs | 4 µs | 4 µs | 4 µs |
| Architecture | SAR | SAR | SAR | SAR |
| Internal Reference | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) | 2.5 V (on-chip) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Lifecycle Status | NRNR | NRNR | Active | NRNR |
Key Differentiators
- Integrated 2.5 V band-gap reference on-chip (vs ADC10158CIWM/NOPB)
- 10-bit + Sign resolution (bipolar measurement built-in) (vs ADC10154CIWM)
- Pin-compatible tape-and-reel packaging for SMT lines (vs ADC10158CIN/NOPB)
Design Notes
Estimated: The ADC10158CIWMX requires separate analog and digital +5 V supply pins (AVCC and DVCC); star-route the analog and digital grounds to a single-point connection beneath the IC to prevent digital switching noise from coupling into the analog front-end. Decouple each VCC pin with a 100 nF ceramic capacitor placed within 2-3 mm of the lead, plus a bulk 10 µF tantalum or ceramic capacitor on the board-level rail. Reference decoupling on the VREF pin (100 nF + 10 µF) is critical to keep the internal 2.5 V band-gap reference stable - this directly impacts absolute ADC accuracy.
Place the analog input traces on an inner PCB layer with a ground pour above and below to shield them from digital signals. Keep the analog input trace lengths matched for all 8 channels if you plan to switch between differential pairs at high speed, and use guard traces around high-impedance analog inputs to prevent leakage current from switching digital lines. The 28-SOIC package allows moderate pin escape; place at least 2 vias per VCC/GND pair to minimize supply-lead inductance.
Do not exceed the analog input voltage range (typically VCC ± 0.3 V); over-driving an input without proper clamping can latch up the CMOS input structures. The sign bit only resolves correctly in pseudo-differential or differential configurations; in single-ended mode below ground, the sign bit may be invalid. When using the internal 2.5 V reference, allow at least 1 ms after power-up for the band-gap to settle before initiating conversions, or the first samples will be inaccurate.
Compliance Information
RoHS and lead-free compliant per TI product page. Not AEC-Q100 qualified - choose ADS7042 or other AEC-Q100 ADCs for automotive.
