ADC10158CIWMX/NOPB - 10-Bit+Sign 8-Ch SAR ADC | Texas Instruments
MPN: ADC10158CIWMX/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.05 | $80.50 |
| 100 | $7.16 | $716.00 |
| 500 | $6.45 | $3,225.00 |
| 1,000 | $5.74 | $5,740.00 |
ADC10158CIWMX/NOPB Overview
An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a precision data-converter architecture that performs one bit per clock cycle using an internal DAC and comparator, trading off speed against resolution and power. SAR ADCs sit hierarchically within the broader ADC family -> data converters -> mixed-signal ICs -> signal chain semiconductors. They are favored where low-latency, deterministic conversions and excellent DC accuracy are required, in contrast to sigma-delta ADCs which target higher dynamic range at the cost of latency.
Key features include the 8-channel software-configurable analog MUX, true-differential and pseudo-differential input modes, an internal 2.5V reference (or optional external reference), a parallel output bus, and an on-chip track-and-hold that eliminates the need for an external sample-and-hold amplifier. The CMOS process delivers low power consumption suitable for industrial monitoring and multi-channel data-acquisition front ends.
Typical applications include multi-channel data acquisition systems, industrial process control, instrumentation, multiplexed sensor signal conditioning, and medical monitoring equipment where several analog channels must be digitized with deterministic latency.
When designing with this ADC, ensure the input source impedance stays below the datasheet limit to avoid conversion error, decouple VCC and VREF with 0.1uF ceramic capacitors placed close to the pins, and observe proper layout grounding to minimize digital noise coupling into the analog inputs. The wide-body SOIC footprint allows robust through-hole-feel probing and standard hand-soldering workflows.
This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes drawn from the manufacturer datasheet - giving an engineer the integrated buying decision context a standalone datasheet does not provide.
Drop-in alternatives for ADC10158CIWMX/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 ADC10158CIWMX/NOPB (same form factor and footprint) — differing in Input Type, Package, Resolution, Data Interface, Number of Input Channels.
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 →ADC10154CIWMX/NOPB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC10158CIWMX
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.2 / Unit
View Datasheet →ADC10158CIWM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC10158CIWMX/NOPB Maximum Ratings & Electrical Characteristics
| Number of Bits | 10 bit plus sign |
| Sampling Rate | 166 ksps (4 us conversion) |
| Number of Input Channels | 8 |
| Architecture | SAR (Successive Approximation Register) |
| Input Configuration | Single-ended, Differential, Pseudo-differential |
| Data Interface | Parallel (8-bit access) |
| Number of A/D Converters | 1 |
| Reference Type | Internal 2.5V bandgap or external |
| Track-and-Hold | On-chip |
| Package | 28-SOIC (0.295 inch / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| Input Type | Differential, Pseudo-Differential, Single Ended |
| Packaging | Tape & Reel (TR) |
| Configuration | MUX + S/H + ADC |
ADC10158CIWMX/NOPB Pin Configuration
| Pin 1 | AIN0 — Analog input channel 0 |
| Pin 2 | AIN1 — Analog input channel 1 |
| Pin 3 | AIN2 — Analog input channel 2 |
| Pin 4 | AIN3 — Analog input channel 3 |
| Pin 5 | AIN4 — Analog input channel 4 |
| Pin 6 | AIN5 — Analog input channel 5 |
| Pin 7 | AIN6 — Analog input channel 6 |
| Pin 8 | AIN7 — Analog input channel 7 |
| Pin 9 | AGND — Analog ground |
| Pin 10 | VREF — Reference voltage (internal 2.5V or external) |
| Pin 11 | VCC — Positive supply voltage |
| Pin 12 | DGND — Digital ground |
| Pin 13 | CLK — Conversion clock input |
| Pin 14 | /WR — Write/Start conversion |
| Pin 15 | /RD — Read enable |
| Pin 16 | /CS — Chip select (active low) |
| Pin 17 | D7 — Parallel data output bit 7 (MSB) |
| Pin 18 | D6 — Parallel data output bit 6 |
| Pin 19 | D5 — Parallel data output bit 5 |
| Pin 20 | D4 — Parallel data output bit 4 |
| Pin 21 | D3 — Parallel data output bit 3 |
| Pin 22 | D2 — Parallel data output bit 2 |
| Pin 23 | D1 — Parallel data output bit 1 |
| Pin 24 | D0 — Parallel data output bit 0 (LSB) |
| Pin 25 | SIGN — Sign bit output |
| Pin 26 | MUX_SEL0 — Channel select input 0 |
| Pin 27 | MUX_SEL1 — Channel select input 1 |
| Pin 28 | MUX_SEL2 — Channel select input 2 |
Typical Applications
ADC10158CIWMX/NOPB is suitable for 6 applications: Multi-Channel Industrial Data Acquisition, Process Control and Sensor Multiplexing, Medical Monitoring Equipment, Automated Test Equipment (ATE) and Instrumentation, Portable and Battery-Operated Instrumentation, Legacy Control System Modernization.
Multi-Channel Industrial Data Acquisition
The ADC10158CIWMX/NOPB's 8 input channels and 4 us conversion (166 ksps aggregate) make it a strong fit for multi-channel industrial data-acquisition front ends where several sensor signals must be digitized by a single converter. The 10-bit-plus-sign resolution handles industrial sensor ranges (4-20 mA, 0-10 V, thermocouples) when paired with input signal conditioning. The internal 2.5V bandgap reference reduces external component count. The parallel 8-bit interface simplifies connection to microcontrollers or DSPs without needing a serial protocol stack, simplifying firmware. Placed after an instrumentation amp (e.g., INA128) and input protection, the ADC10158 handles eight channels deterministically at -40C to +85C, suitable for factory-floor PLCs and remote telemetry units. Compared to a sigma-delta ADC, the SAR architecture gives single-cycle deterministic latency - critical when capturing transient events.
Recommended
Process Control and Sensor Multiplexing
For process-control loops reading multiple temperature, pressure, and flow transmitters, the ADC10158CIWMX/NOPB's software-configurable MUX supports single-ended, differential, and pseudo-differential inputs from sensors across grounded or floating sources. The on-chip track-and-hold eliminates the need for an external SHA, reducing BOM cost and board area. With 166 ksps throughput, the ADC10158 can sequentially digitize 8 channels at roughly 20 ksps per channel - adequate for thermal and pressure loop rates. The 28-SOIC wide-body package supports robust hand-soldering for prototype panels. Designers should add input RC filters and protection diodes ahead of each channel when the sensor environment includes ESD or transient surge exposure.
Recommended
Medical Monitoring Equipment
In medical patient monitoring equipment digitizing multiple physiological signals (e.g., temperature, SpO2 front-end outputs, ECG auxiliary channels), the ADC10158CIWMX/NOPB's 8 channels and 10-bit-plus-sign resolution provide adequate dynamic range for many auxiliary signals. The SAR architecture's deterministic single-cycle latency is valuable when the host MCU needs an immediate digitized sample for alarm threshold checks. Note that this part is not AEC-Q100 qualified and is intended for non-life-support medical instrumentation only. For higher-resolution ECG/EEG channels, pair this ADC with a dedicated 16/24-bit sigma-delta converter while using the ADC10158 for auxiliary multi-channel telemetry.
Recommended
Automated Test Equipment (ATE) and Instrumentation
Bench-top and rack-mounted automated test equipment digitizing multiple DUT stimulus/measurement points benefits from the ADC10158CIWMX/NOPB's 8 multiplexed channels and parallel interface. The deterministic 4 us conversion supports fast loop rates in scan-based ATE, while the internal reference simplifies the BOM for portable instrumentation. The wide-body 28-SOIC package is straightforward to probe with oscilloscope hooks during bring-up. Use the differential input mode for high-noise-rejection bench measurements of bridge sensors and small-signal analog front ends. When higher DC accuracy is required, swap in the 16-bit ADS8860 on the critical channel while retaining the ADC10158 for auxiliary channels.
Recommended
Portable and Battery-Operated Instrumentation
Handheld multimeters, portable data loggers, and field instrumentation leverage the ADC10158CIWMX/NOPB's CMOS low-power operation to digitize multiple channels from a single converter, reducing total system power compared to running multiple single-channel ADCs. The internal 2.5V reference eliminates a separate reference IC, cutting quiescent current and board area. While the datasheet does not specify an ultra-low Iq, the CMOS SAR architecture typically draws only a few mW during conversion and is well-suited for duty-cycled sampling in battery-powered systems. Pair with a low-power MCU like the MSP430 series for full system-level energy optimization.
Recommended
Legacy Control System Modernization
When modernizing older 4-20 mA loop controllers, programmable logic controllers, and SCADA remote terminal units, the ADC10158CIWMX/NOPB serves as a form-fit-function replacement for legacy multi-channel ADCs in existing 28-SOIC footprints. The RoHS-compliant /NOPB suffix supports modernization programs that must eliminate lead from the BOM, while the same pinout and electrical characteristics preserve the existing PCB layout. The 10-bit-plus-sign resolution matches the typical legacy ADC performance and is usually sufficient for slow control loops (temperature, level, pressure). Designers should verify timing compatibility with the host microprocessor bus and add input protection if the legacy system experienced field failures.
Recommended
Recommended Products Summary
Engineering reference data for ADC10158CIWMX/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC10158CIWM/NOPB | ADC10158CIN/NOPB | ADC10154CIWMX/NOPB | ADC10158CIWMX | ADC10158CIWM |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC (0.295 inch) | 28-SOIC (0.295 inch) - same | 28-SOIC (0.295 inch) - same | 28-SOIC (0.295 inch) - same | 28-SOIC (0.295 inch) - same | 28-SOIC (0.295 inch) - same |
| Number of Bits | 10-bit + sign | 10-bit + sign | 10-bit + sign | 10-bit + sign | 10-bit + sign | 10-bit + sign |
| Number of Input Channels | 8 | 8 | 8 | 4 (-50%) | 8 | 8 |
| Sampling Rate | 166 ksps (4 us) | 166 ksps (4 us) | 166 ksps (4 us) | 166 ksps (4 us) | 166 ksps (4 us) | 166 ksps (4 us) |
| Reference Type | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external | Internal 2.5V or external |
| RoHS Compliant | Yes (/NOPB suffix) | Yes (/NOPB) | Yes (/NOPB) | Yes (/NOPB) | No (lead solder) | No (lead solder) |
| Carrier Packaging | Tape & Reel (TR) | Tube | Tube | Tape & Reel | Tape & Reel | Tube |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- 8-channel on-chip MUX with configurable input modes (vs ADC10154CIWMX/NOPB)
- RoHS-compliant lead-free packaging (vs ADC10158CIWMX (non-NOPB))
- Tape-and-reel packaging for high-volume assembly (vs ADC10158CIWM/NOPB)
Design Notes
Decouple VCC and VREF with 0.1 uF ceramic capacitors placed within 5 mm of the supply pins. The internal 2.5V bandgap reference is sensitive to supply noise; adding a 10 uF tantalum or ceramic bulk capacitor in parallel with the 0.1 uF decoupling cap on VREF reduces reference noise. Keep analog input traces short and shield them with a ground pour on the same layer to minimize digital switching noise coupling into the analog inputs. Separate AGND and DGND planes and join them at a single point near the ADC.
Source impedance above the datasheet limit (typically a few kOhm) degrades conversion accuracy because the internal track-and-hold cannot fully settle within the acquisition window. Add a buffer op-amp (e.g., OPA2333 or LF353) per channel or per pair when driving from high-impedance sensors. Do not exceed the absolute maximum analog input voltage (VCC + 0.3V); add external clamping diodes if the sensor environment can present transients. The parallel data bus transitions on every /RD cycle - keep bus traces short to avoid reflections in noisy industrial environments.
Route the parallel data bus D0-D7, /CS, /RD, /WR, and CLK traces together with matched lengths where possible to minimize digital skew. Place the ADC near the host microprocessor to keep parallel bus traces short. Avoid running analog input traces under the parallel digital bus or near clock traces. Use a 4-layer PCB with dedicated analog and digital ground planes for best noise performance; on 2-layer boards, use a star-ground topology with the ADC AGND as the central tie point.
Compliance Information
The /NOPB suffix indicates RoHS-compliant lead-free packaging. Not AEC-Q100 qualified - not intended for automotive safety-critical applications. Conflict-minerals compliance per TI standard declaration.
