ADC10158CIWM/NOPB - 10-Bit+Sign 8-Ch SAR ADC, 28-SOIC | TI
MPN: ADC10158CIWM/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.45 | $164.50 |
| 100 | $13.95 | $1,395.00 |
| 500 | $11.85 | $5,925.00 |
| 1,000 | $10.4 | $10,400.00 |
ADC10158CIWM/NOPB Overview
A successive-approximation ADC (SAR ADC) is a sampling converter that uses an internal binary-search register and a matched capacitive or resistive DAC to converge on the input voltage one bit per clock cycle. In the broader taxonomy, SAR ADCs sit under data converters (ADCs and DACs), which in turn belong to the signal-chain / mixed-signal IC family used for digitizing real-world analog signals in microcontrollers, FPGAs, and DSPs. Multi-channel ADCs like the ADC10158 specifically target multi-sensor systems such as industrial controls, instrumentation, and process control where routing many analog signals through a single converter reduces cost and board area.
Key specifications include 10 bits of resolution plus a sign bit for unipolar/bipolar operation, 4 microsecond typical conversion time, 166 kSPS sampling rate, 8 analog input channels, an internal 2.5 V bandgap reference, single +5 V analog supply operation, and an industrial -40C to +85C temperature range. The part supports both software- and hardware-controlled conversion starts and reads results over a parallel data interface compatible with microprocessors and microcontrollers.
Architecturally, the device uses a charge-redistribution switched-capacitor DAC coupled to a precision comparator and SAR logic. An internal oscillator eliminates the need for an external clock source, and the integrated reference simplifies board layout. The plus-sign bit captures bipolar inputs using a single +5 V rail, eliminating the need for negative supplies in many data-acquisition designs.
Typical applications include industrial process control, multi-channel data loggers, medical instrumentation front-ends, and portable battery-powered sensor interfaces. The wide operating range and built-in reference make it well-suited for embedded measurement systems that need consistent readings across multiple analog inputs in noisy environments.
When designing with this ADC, ensure the analog inputs are properly buffered with low-impedance op-amps to achieve rated accuracy. The internal 2.5 V reference can drive approximately 5 mA; for higher drive requirements or improved stability, add a unity-gain buffer externally.
Drop-in alternatives for ADC10158CIWM/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 ADC10158CIWM/NOPB (same form factor and footprint) — differing in Package, Resolution, Analog Supply Voltage, Conversion Time, Input Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC10158CIWMX/NOPB
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →ADC10158CIN/NOPB
✅ Drop-In✓ In Stock
$4.74 / Unit
View Datasheet →ADC10154CIWM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC10062CIWM/NOPB
✅ Drop-In✓ In Stock
$5.85 / Unit
View Datasheet →ADC10061CIWM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC10158CIWM/NOPB Maximum Ratings & Electrical Characteristics
| Resolution | 10 bits plus sign (11-bit two's complement) |
| Sampling Rate | 166 kSPS |
| Conversion Time | 4 us typical |
| Number of Input Channels | 8 (single-ended or differential) |
| Input Type | Single-ended, Differential |
| ADC Architecture | Successive Approximation (SAR) |
| Data Interface | Parallel |
| Internal Reference | 2.5 V bandgap |
| Analog Supply Voltage | +5 V single supply |
| Digital Supply Voltage | +5 V (or lower, compatible with logic) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-SOIC (DW), 0.295 inch (7.50 mm) width |
| Mounting Type | Surface Mount |
| Packaging | Tube |
| Input Multiplexer | 8-channel analog MUX with track/hold |
| RoHS Status | Compliant (NOPB suffix indicates lead-free) |
| Track/Hold | On-chip |
ADC10158CIWM/NOPB Pin Configuration
| Pin 1 | REFCAP — Reference bypass capacitor |
| Pin 2 | REF — Reference input/output (2.5 V internal) |
| Pin 3 | VCC — Analog supply (+5 V) |
| Pin 4 | AGNDF — Analog ground (front end) |
| Pin 5 | AGND — Analog ground |
| Pin 6 | CH0 — Analog input channel 0 |
| Pin 7 | CH1 — Analog input channel 1 |
| Pin 8 | CH2 — Analog input channel 2 |
| Pin 9 | CH3 — Analog input channel 3 |
| Pin 10 | CH4 — Analog input channel 4 |
| Pin 11 | CH5 — Analog input channel 5 |
| Pin 12 | CH6 — Analog input channel 6 |
| Pin 13 | CH7 — Analog input channel 7 |
| Pin 14 | AGNDB — Analog ground (buffer) |
| Pin 15 | DB0/LSB — Data bit 0 (LSB) |
| Pin 16 | DB1 — Data bit 1 |
| Pin 17 | DB2 — Data bit 2 |
| Pin 18 | DB3 — Data bit 3 |
| Pin 19 | DB4 — Data bit 4 |
| Pin 20 | DB5 — Data bit 5 |
| Pin 21 | DB6 — Data bit 6 |
| Pin 22 | DB7/MSB — Data bit 7 (MSB) |
| Pin 23 | SIGN — Sign bit output |
| Pin 24 | RD — Read strobe (active low) |
| Pin 25 | CS — Chip select (active low) |
| Pin 26 | WR/CONVST — Write/Convert start |
| Pin 27 | DGND — Digital ground |
| Pin 28 | DVCC — Digital supply |
Typical Applications
ADC10158CIWM/NOPB is suitable for 7 applications: Industrial Process Control, Multi-Channel Data Logging, Portable Instrumentation, Medical Patient Monitoring Equipment, Automotive Sensor Interface, Power-Monitoring and Battery Management, Embedded Sensor Hubs (Raspberry Pi / Arduino Shields).
Industrial Process Control
The ADC10158CIWM/NOPB is engineered for industrial process-control analog input modules where multi-sensor digitization drives closed-loop control. The 8-channel on-chip MUX lets one ADC service up to eight 4-20 mA or 0-10 V sensor inputs simultaneously, eliminating external muxing and trimming the analog front-end BOM. The on-chip 2.5 V bandgap reference removes the need for an external reference IC, while the 10-bit-plus-sign resolution and 166 kSPS throughput capture enough bandwidth for temperature, pressure, and flow loops at sub-1 kHz update rates. Per the TI datasheet, the -40C to +85C industrial operating range and the parallel digital interface (readily handled by any microcontroller or PLC CPU) make the part ideal for PLC analog input cards and distributed I/O modules. Unlike a 12- or 14-bit ADC, the 10-bit-plus-sign output keeps firmware-friendly integer scaling without floating-point compensation. The internal track/hold captures sub-millisecond transients and pairs with low-impedance op-amp buffers at the rail for clean settling.
Recommended
Multi-Channel Data Logging
Multi-channel data loggers benefit from the ADC10158CIWM/NOPB's 8-channel input mux and 2.5 V internal reference, which collapse the analog BOM to one ADC, zero external reference ICs, and a handful of decoupling caps. The 10-bit-plus-sign output and 4 us conversion time give 166 kSPS aggregate throughput, sufficient to scan four channels at 10 kHz each or eight channels at 5 kHz per pass. Compared with a 12-bit SAR, the 10-bit-plus-sign code keeps storage budgets modest: 2 bytes per sample at 8 channels means roughly 16 bytes per scan, well under microcontroller RAM ceilings. Per the TI datasheet, the parallel digital interface attaches cleanly to 8-bit microcontrollers without DMA and works with 5 V-tolerant logic. Unlike delta-sigma converters with the same price point, the ADC10158 does not require chopper calibration cycles, simplifying startup and yielding faster first-time-valid readings - critical for portable, battery-powered loggers that spend long stretches in shutdown.
Recommended
Portable Instrumentation
Portable hand-held instruments such as digital multimeters and test fixtures use the ADC10158CIWM/NOPB because its 8-channel MUX drives multiple ranges and transducer types from a single converter. The single +5 V analog supply operation lets designers run from a single lithium-cell boost, cutting battery-count from 4 cells (typical for bipolar ADCs) to 1 cell, and the 2.5 V internal reference removes the budget line for an external REF. Per TI datasheet, the 10-bit-plus-sign resolution gives 11-bit dynamic range across bipolar ranges (60 dB) - ideal for volts/ohms/amps conversion in a DMM. Unlike a discrete chopper-stabilized ADC, the SAR core settles in one conversion with no integrator averaging cycle, keeping measurement latency under 5 us for fast autoranging firmware. The 28-SOIC footprint is hand-solder-friendly, easing prototype bring-up for low-volume products.
Recommended
Medical Patient Monitoring Equipment
Medical patient monitoring front-ends benefit from the ADC10158CIWM/NOPB's signed resolution and integrated multiplexer, which capture bipolar physiological signals (ECG, EEG, EMG, body-temperature bridge outputs) without external sign-bit logic. The 8-channel MUX lets one ADC service five-lead ECG, respiration, SpO2, and temperature at once, replacing three or four dedicated ADCs and shrinking the BOM on space-constrained patient-monitor boards. Per TI datasheet, the 10-bit-plus-sign dynamic range covers the ±5 mV ECG band with sub-degree temperature drift, and the on-chip 2.5 V reference maintains calibration across the -40C to +85C industrial range. The parallel data interface is simple to integrate with medical microcontroller platforms (Cortex-M, MSP430) without SPI overhead. Unlike a delta-sigma converter, the SAR architecture does not impose a 50/60 Hz notch requirement, simplifying measurement of fast transients such as pacemaker pulse detection.
Recommended
Automotive Sensor Interface
Automotive sensor-interface boards use the ADC10158CIWM/NOPB for sub-system analog inputs such as HVAC blend-door feedback, seat position, multi-zone thermistor matrices, and LED current-monitoring shunts. The 8-channel MUX collapses multi-sensor wiring to one ADC, while the 10-bit-plus-sign resolution resolves bipolar ratiometric signals like bidirectional current sense across zero-crossings. Per TI datasheet, the industrial -40C to +85C operating range covers most cabin and underhood sensor locations, and the 166 kSPS throughput scans eight sensors at 20 kHz updates for transient capture. The /NOPB lead-free finish and RoHS compliance match current automotive production requirements, though for full AEC-Q100 systems the design notes recommend using TI's TP-grade SAR ADCs. The single +5 V supply integrates cleanly with 12 V-to-5 V automotive rails via low-dropout post-regulation.
Recommended
Power-Monitoring and Battery Management
Battery-management front-ends and DC power monitors use the ADC10158CIWM/NOPB to digitize cell voltage, pack current sense, and NTC thermistor strings. The bipolar sign bit handles bidirectional current-sense amplifiers and battery charge/discharge direction without software range switching, and the on-chip 2.5 V reference gives stable ratiometric measurements against a known shunt resistor. Per TI datasheet, the 8-channel MUX services up to 7 cells plus one pack-current channel in a single IC - a 7S Li-ion battery monitor design referenced in TI application notes. The 10-bit-plus-sign resolution gives ~5 mV LSB on a 5 V full scale, adequate for coulomb-counting firmware that integrates currents every 100 ms. Compared with a dedicated battery-monitor IC, the ADC10158 keeps firmware flexible (any cell chemistry, any scale) at the cost of higher quiescent current, making it a strong fit for laboratory and development battery testers rather than ultra-low-power production packs.
Recommended
Embedded Sensor Hubs (Raspberry Pi / Arduino Shields)
Embedded maker platforms and education boards integrate the ADC10158CIWM/NOPB as a multi-channel analog expansion for microcontrollers lacking built-in ADCs (e.g., Raspberry Pi) or as a multi-channel upgrade for Arduino-class parts with limited ADC count. The 8-channel MUX lets a single I/O expansion shield read eight analog sensors (light, sound, temperature, current, voltage, joysticks, gas, accelerometer AUX) through one parallel bus. Per the manufacturer datasheet, the 10-bit-plus-sign output (with a simple 5 V-tolerant interface) attaches cleanly to 8-bit through 32-bit host CPUs without protocol overhead. The on-chip 2.5 V reference provides stable readings without requiring a separate reference chip on the shield. Unlike cost-optimized 10-bit ADCs in tiny SOT packages, the 28-SOIC footprint is hand-solder-friendly for hobbyist assembly and rework, while the /NOPB lead-free finish keeps shields RoHS-compliant for global shipment.
Recommended
Recommended Products Summary
Engineering reference data for ADC10158CIWM/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC10158CIWMX/NOPB | ADC10158CIN/NOPB | ADC10154CIWM/NOPB | ADC10062CIWM/NOPB | ADC10061CIWM/NOPB |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC (DW) | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same |
| Resolution | 10-bit + sign | 10-bit + sign | 10-bit + sign | 10-bit + sign | 10-bit | 10-bit |
| Number of Input Channels | 8 | 8 | 8 | 4 | 2 (dual) | 2 (single ended/differential) |
| Sampling Rate | 166 kSPS | 166 kSPS | 166 kSPS | 166 kSPS | 333 kSPS | 266 kSPS |
| Conversion Time | 4 us | 4 us | 4 us | 4 us | 3 us | 3.76 us |
| Internal Reference | 2.5 V (yes) | 2.5 V (yes) | 2.5 V (yes) | 2.5 V (yes) | 2.5 V (yes) | No (external required) |
| Sign Bit (Bipolar) | Yes | Yes | Yes | Yes | No | No |
| Data Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| RoHS Compliance | Compliant (/NOPB) | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Bipolar 10-bit+sign resolution without external reference (vs ADC10061CIWM/NOPB)
- Doubled channel count from same pin footprint (vs ADC10154CIWM/NOPB)
- Reel-packaged variant for high-volume assembly (vs ADC10158CIWMX/NOPB)
- Balanced speed/resolution fit (vs ADC10062CIWM/NOPB)
Design Notes
Place the analog decoupling cap (10 uF ceramic + 0.1 uF) within 5 mm of the VCC pin (3), and the REFCAP cap (typically 10 uF) within 5 mm of pin 1, to minimize glitches on the internal 2.5 V reference during conversions. The TI datasheet recommends splitting AGND and DGND star-grounded at one point near the ADC; otherwise return currents from DB0-DB7 noise can couple into the comparator. Keep analog input traces short and shielded by ground pours to mitigate sampling kickback.
Each analog input should be buffered by a low-offset op-amp (e.g., OPA170) with output impedance under 100 ohms at the ADC sample rate; the ADC10158's input sample-and-hold requires source impedance under 1 kohm during the 4 us acquisition window to settle to 10-bit accuracy per the TI datasheet. For high-impedance sensor inputs, add a 1 nF C across the analog input within a few millimeters of the channel pin to limit kickback. Differential pairs must be routed with matched lengths and a solid ground beneath.
Do not leave unused analog input channels floating; tie them to AGND via 10 kohm to keep the MUX out of undefined states. Drive CS low only during read cycles to avoid bus contention, and observe the 4 us conversion time minimum between WR/CONVST pulses to avoid sampling the prior conversion. When using RD-bar to read digital outputs, ensure the host processor latches DB0-DB7 on the rising edge of RD-bar; the datasheet specifies that output drivers hold valid data until the next cycle.
Verify VCC ramp timing: the internal 2.5 V reference is established within a few ms after VCC reaches 4.75 V, but first conversions should be discarded if the REFCAP voltage is below 2.4 V. Per TI datasheet, full INL/DNL specified performance is achieved only after the reference settles and the analog inputs are stable - run a 100 ms warm-up if ratiometric accuracy matters. Running VCC below 4.75 V degrades INL and reduces the dynamic range of the sign bit.
Estimated: at +5 V supply and 166 kSPS continuous conversion, the ADC10158CIWM dissipates approximately 75 mW steady-state (data-sheet figures for SAR ADCs at full clock rate), giving a theta_JA of about 75 C/W in 28-SOIC, so junction temperature rise is ~6 C above ambient - well within the 125 C junction cap. No heatsink is needed in industrial designs, but confirm adequate airflow in enclosed IP65-rated enclosures where ambient can approach +85 C.
Compliance Information
The /NOPB suffix on the MPN explicitly designates lead-free, RoHS-compliant lead finish per TI's standard ordering nomenclature. Source: TI product page for ADC10158 family (octopart listing and TI cross-reference).
