ADC10158CIWMX/NOPB - 10-Bit+Sign 8-Ch SAR ADC | Texas Instruments
MPN： ADC10158CIWMX/NOPB ✓ 啟用中ADC10158CIWMX/NOPB 概覽
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.
直接替換替代品，適用於 ADC10158CIWMX/NOPB — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADC10158CIWMX/NOPB （相同外形與佔位） — 差異在於 Input Type, Package, Resolution, Data Interface, Number of Input Channels.
ADC10158CIWM/NOPB
✅ 直接替換聯絡詢價
查看資料表 →ADC10158CIN/NOPB
✅ 直接替換聯絡詢價
查看資料表 →ADC10154CIWMX/NOPB
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADC10158CIWMX
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADC10158CIWM
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADC10158CIWMX/NOPB 最大額定值與電氣特性
| Number of Bits | 10 bit plus sign |
| 取樣率 | 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 |
| 封裝 | 28-SOIC (0.295 inch / 7.50 mm width) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C |
| Input Type | Differential, Pseudo-Differential, Single Ended |
| Packaging | Tape & Reel (TR) |
| Configuration | MUX + S/H + ADC |
ADC10158CIWMX/NOPB 腳位配置
| 腳位 1 | AIN0 — Analog input channel 0 |
| 腳位 2 | AIN1 — Analog input channel 1 |
| 腳位 3 | AIN2 — Analog input channel 2 |
| 腳位 4 | AIN3 — Analog input channel 3 |
| 腳位 5 | AIN4 — Analog input channel 4 |
| 腳位 6 | AIN5 — Analog input channel 5 |
| 腳位 7 | AIN6 — Analog input channel 6 |
| 腳位 8 | AIN7 — Analog input channel 7 |
| 腳位 9 | AGND — Analog ground |
| 腳位 10 | VREF — Reference voltage (internal 2.5V or external) |
| 腳位 11 | VCC — Positive supply voltage |
| 腳位 12 | DGND — Digital ground |
| 腳位 13 | CLK — Conversion clock input |
| 腳位 14 | /WR — Write/Start conversion |
| 腳位 15 | /RD — Read enable |
| 腳位 16 | /CS — Chip select (active low) |
| 腳位 17 | D7 — Parallel data output bit 7 (MSB) |
| 腳位 18 | D6 — Parallel data output bit 6 |
| 腳位 19 | D5 — Parallel data output bit 5 |
| 腳位 20 | D4 — Parallel data output bit 4 |
| 腳位 21 | D3 — Parallel data output bit 3 |
| 腳位 22 | D2 — Parallel data output bit 2 |
| 腳位 23 | D1 — Parallel data output bit 1 |
| 腳位 24 | D0 — Parallel data output bit 0 (LSB) |
| 腳位 25 | SIGN — Sign bit output |
| 腳位 26 | MUX_SEL0 — Channel select input 0 |
| 腳位 27 | MUX_SEL1 — Channel select input 1 |
| 腳位 28 | MUX_SEL2 — Channel select input 2 |
典型應用
ADC10158CIWMX/NOPB 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADC10158CIWMX/NOPB — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- 8-channel on-chip MUX with configurable input modes (對比ADC10154CIWMX/NOPB)
- RoHS-compliant lead-free packaging (對比ADC10158CIWMX (non-NOPB))
- Tape-and-reel packaging for high-volume assembly (對比ADC10158CIWM/NOPB)
設計說明
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.
合規資訊
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.
