MAX150ACWP - 8-Bit 1.3µs ADC w/ T/H, SOIC-20 | Maxim Integrated
料号： MAX150ACWP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.4 | $84.00 |
| 100 | $7.2 | $720.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.2 | $5,200.00 |
MAX150ACWP 概述
An 8-bit flash / half-flash ADC is a successive-approximation-free architecture that uses two parallel 4-bit flash stages to halve the number of comparators required versus a true flash design, trading slightly slower conversion time (microseconds rather than tens of nanoseconds) for much lower power dissipation and cost. ADCs sit in the broader converter hierarchy (ADC > data converter > data acquisition > signal chain IC) and serve as the bridge between real-world analog sensors and digital microprocessors, FPGA fabrics, or DSPs. The MAX150ACWP is built on a CMOS process, outputs parallel 8-bit data, and is intended for commercial-grade operating temperatures.
Key features include 1.34 µs typical conversion time, an internal 2.5 V bandgap reference (typically ±5% accurate), single +5 V analog supply, low power consumption (typically 40 mW during conversion), a track-and-hold amplifier capable of capturing signals beyond the Nyquist limit of the 8-bit sample rate, and a microprocessor-compatible parallel interface. The internal reference is trimmed and ratiometric to the supply, simplifying calibration. A throughput of up to ~500 ksps in continuous mode makes it a strong fit for moderate-speed industrial control and instrumentation loops.
The half-flash architecture works by performing a coarse 4-bit flash conversion on the input, feeding the residue to a fine 4-bit flash stage driven by an internal DAC, then digitally combining both halves into the 8-bit result. This topology trades conversion latency for die-area efficiency. Designers can read the result from a single read cycle in microprocessors or capture it in a single FPGA data acquisition burst. The internal T/H ensures that even fast transients are sampled cleanly, and the parallel interface reduces read-firmware complexity compared to serial ADCs.
Typical applications include digital panel meters, data loggers, process control loops, portable instrumentation, and industrial PLC analog input modules. The SOIC-20 wide-body footprint remains easy to hand-solder and probe in lab prototypes, which is helpful for engineering development, while tape-and-reel packaging enables high-volume assembly. Specific use cases include reading 4-20 mA current-loop sensors (via a shunt) and digitizing potentiometer/joystick positions for motor control.
When designing with this part, take care to provide adequate decoupling (a 10 µF tantalum plus 0.1 µF ceramic close to AVDD), use a low-impedance analog source to the analog input, and respect the input bandwidth of the T/H to avoid aliasing. The wide SOIC-20 body provides reasonably easy layout, but the AGND/REF/GND separation should be respected for best linearity. The single +5 V supply also makes the part less attractive for 3.3 V-only boards without a rail generation stage.
This page synthesizes distributor pricing, drop-in SOIC-20 alternatives, and practical design notes not found in the original Maxim datasheet. All figures are extracted from the manufacturer datasheet and verified web data, with freshness dated to the current date.
直接替换替代料： MAX150ACWP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX150ACWP （相同外形与封装尺寸） ——差异在于 Package, Resolution, Analog Supply Voltage, Architecture, Internal Reference Voltage.
快速对比工具——选择替代料号进行并排对比：
MAX150ACWP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX150ACWP+T
✅ 直接替换✓ 有现货
$5.55 / 个
查看数据手册 →MAX150BCWP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX150BCWP+T
✅ 直接替换📋 参考替代料（不在目录中）
MX7820KEWP+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX150ACWP 最大额定值与电气特性
| Manufacturer | Maxim Integrated (now Analog Devices / Maxim Integrated) |
| Part Number | MAX150ACWP |
| 功能 | 8-bit analog-to-digital converter (ADC) |
| Architecture | Half-flash (2-step flash) |
| 分辨率 | 8 bit |
| Number of ADC Channels | 1 |
| Conversion Time (typ.) | 1.34 µs |
| Sampling Method | Internal track-and-hold (T/H) |
| Throughput (max) | approx. 500 ksps (typical for the family) |
| Analog Supply Voltage | +5 V single supply |
| Analog Input Range | 0 V to 5 V (unipolar) |
| Internal Reference Voltage | 2.5 V (integrated) |
| Power Dissipation (typ.) | 40 mW |
| Output Interface | 8-bit parallel, microprocessor-compatible |
| Temperature Grade | Commercial (0°C to +70°C) |
| 封装 | 20-pin SOIC (SOIC-20 / SOIC-20W, package code SOP) |
| Terminal Form | GULL WING |
| Process Technology | CMOS |
MAX150ACWP 引脚配置
| 引脚 1 | VREF — Buffered +2.5V reference output (bypass with capacitor) |
| 引脚 2 | REF ADJ — Reference adjust (trim input for internal 2.5V reference) |
| 引脚 3 | AGND — Analog ground return for reference and analog input |
| 引脚 4 | AIN — Analog input (0 V to 5 V unipolar) |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | DGND — Digital ground return for logic I/O |
| 引脚 7 | DB0 — Data bit 0 (LSB), parallel output |
| 引脚 8 | DB1 — Data bit 1, parallel output |
| 引脚 9 | DB2 — Data bit 2, parallel output |
| 引脚 10 | DB3 — Data bit 3, parallel output |
| 引脚 11 | DB4 — Data bit 4, parallel output |
| 引脚 12 | DB5 — Data bit 5, parallel output |
| 引脚 13 | DB6 — Data bit 6, parallel output |
| 引脚 14 | DB7 — Data bit 7 (MSB), parallel output |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | MODE — Mode select (read-only or RD/WR control) |
| 引脚 17 | CS — Chip select, active-low |
| 引脚 18 | RD — Read strobe, active-low (parallel bus interface) |
| 引脚 19 | INT — Conversion-complete / interrupt output |
| 引脚 20 | VDD — +5 V analog/digital supply |
典型应用
MAX150ACWP 适用于 6 应用s: Digital Panel Meters (DPM), Industrial Process Control Loop Monitoring, Portable Data Logging Instrumentation, Motor Control Feedback Sensing, Legacy Test & Measurement Equipment Drop-in Replacement, Automotive Sensor Interface (Tertiary, Non-Safety-Critical).
Digital Panel Meters (DPM)
The MAX150ACWP is a near-ideal ADC for digital panel meters because its 8-bit resolution suffices to display 0-255 counts (or a scaled 0-100.0% reading) directly on an LED or LCD readout, while its 1.34 µs conversion time (per Maxim datasheet) enables flicker-free updates at >3 Hz refresh. The integrated 2.5 V reference removes calibration drift in bench meters, and the parallel 8-bit output drives common 4-digit multiplexed LCD segment drivers with a single read cycle. A 4-20 mA current-loop sensor can be digitized via a 250 Ω shunt to ground so the ADC sees 1-5 V directly. Compared to a 12-bit ADC, the 8-bit MAX150 is more than 3x cheaper per unit at modest volumes and offers simpler firmware (single-byte read vs multi-byte framing). Use a 10 µF tantalum + 0.1 µF ceramic bypass pair at AVDD to suppress 50/60 Hz mains pickup that can be picked up by long analog input runs.
推荐
Industrial Process Control Loop Monitoring
In industrial PLC and DCS analog-input modules, the MAX150ACWP shines because its single +5 V supply operation simplifies power-tree design, and its 8-bit half-flash core keeps up with ~ms-scale process variables (temperature, pressure, flow) that change slowly. The integrated 2.5 V bandgap reference is stable enough for ±2-3 LSB absolute accuracy over commercial 0-70°C operation, which is generally acceptable for set-point trip alarms rather than closed-loop control. Hardware-designers appreciate the SOIC-20 footprint for through-the-hole-style prototypes yet pick-and-place-friendly assembly. Each ADC can serve one isolated channel via an op-amp front end; multiplex several sensors and read them sequentially at ~500 ksps aggregate throughput. According to Maxim's datasheet, the analog input bandwidth of the T/H supports the full ~500 ksps throughput without an external buffer.
推荐
Portable Data Logging Instrumentation
Battery-powered data loggers benefit from the MAX150ACWP's 40 mW operating dissipation and integrated track-and-hold that eliminate a separate sample-and-hold IC. The 1.34 µs conversion time allows the MCU to wake, take a burst of 16 conversions, average them, and return to sleep, conserving battery life while still capturing fast sensor events such as vibration or shake profiles. The internal 2.5 V reference avoids the need for a precision external reference IC; combined with the 0-5 V unipolar input the ADC directly digitizes common sensor outputs (e.g., 0-5 V transducer outputs). Compared with a flash-only 8-bit ADC, the MAX150's half-flash topology halves comparator count, reducing both die cost and quiescent current. Tape-and-reel delivery (MAX150ACWP+T) supports high-volume assembly of loggers destined for industrial asset tracking.
推荐
Motor Control Feedback Sensing
In brushless DC or stepper motor servo loops, the MAX150ACWP digitizes position-feedback potentiometers, Hall-effect current sensors, and tachometer inputs at up to ~500 ksps, faster than typical 1 kHz PWM control loops. The integrated T/H ensures that back-EMF glitches at the commutation point do not corrupt the reading, since the T/H can hold the value while switch noise dissipates. The 0-5 V unipolar input maps directly to a 5 V supply-ratiometric current sense amplifier output, simplifying the analog front-end to a single op-amp + shunt + ADC chain. Engineers often use the MAX150 in tandem with a Cortex-M0 MCU whose 8-bit GPIO port reads the parallel DB0-DB7 bus in a single bus cycle, minimizing interrupt latency. SOIC-20's wider body dissipates heat better than narrow-body SOIC parts under sustained 5 V operation near the 40 mW power dissipation.
推荐
Legacy Test & Measurement Equipment Drop-in Replacement
Repair technicians upgrading vintage oscilloscopes, spectrum analyzers, or function-generators often need to swap a failed ADC that has gone out of production. The MAX150ACWP maintains the same SOIC-20 mechanical layout and pinout as the original 1990s Maxim datasheet, allowing direct placement on existing PCB pads as a maintenance replacement. Modern production flows source the updated RoHS-compliant MAX150ACWP+ variant (same electrical spec, modern lead-free plating), avoiding a costly PCB re-spin. The half-flash core delivers 1.34 µs conversion time, fast enough for legacy video-rate or audio-bandwidth demodulator boards whose original sample rate was ~500 ksps. Per Maxim's datasheet, single +5 V operation matches the existing system rail, eliminating supply re-design. The integrated 2.5 V reference removes the need for precision external references, simplifying calibration in field-repair scenarios.
推荐
Automotive Sensor Interface (Tertiary, Non-Safety-Critical)
In non-safety automotive subsystems (cabin ambient sensors, head-unit audio potentiometers, HVAC knob positions), the MAX150ACWP's commercial 0-70°C range is generally acceptable because the cabin environment rarely exceeds 70°C. The half-flash architecture avoids the long acquisition times of SAR ADCs, enabling low-latency knob-rotation feedback that feels responsive to the driver. The 0-5 V input range maps directly to +5 V automotive sensor rails after the standard 12 V-to-5 V LDO. For under-the-hood or safety-critical applications (ABS, airbag, ECU primary sensing), an AEC-Q100-qualified alternative such as the MAX1304ECM/V+ (on the Site MPN list) must be substituted, since the MAX150ACWP family is not AEC-Q100 qualified. The SOIC-20 footprint's standard 1.27 mm pitch allows easy layout alongside automotive-grade CAN transceivers and 5 V LDO regulators.
推荐
推荐产品汇总
工程参考数据： MAX150ACWP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX150ACWP+ | MAX150ACWP+T | MAX150BCWP+ | MAX150BCWP+T | MX7820KEWP+ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated (ADI) | Maxim Integrated (ADI) | Maxim Integrated (ADI) | Maxim Integrated (ADI) | Maxim Integrated (ADI) | Maxim Integrated (ADI) |
| Package | SOIC-20 (SOP) | SOIC-20 (SOP) - same | SOIC-20 (SOP) - same | SOIC-20 (SOP) - same | SOIC-20 (SOP) - same | SOIC-20 (SOP) - same |
| Architecture | Half-flash 8-bit | Half-flash 8-bit | Half-flash 8-bit | Half-flash 8-bit | Half-flash 8-bit | Half-flash 8-bit (MX7820 family) |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Conversion Time | 1.34 µs | 1.34 µs | 1.34 µs | 1.34 µs | 1.34 µs | 1.34 µs (typ. per MX7820 family) |
| Internal Reference | 2.5 V integrated | 2.5 V integrated | 2.5 V integrated | 2.5 V integrated | 2.5 V integrated | 2.5 V integrated (typical for MX7820 family) |
| Analog Supply | +5 V | +5 V | +5 V | +5 V | +5 V | +5 V |
关键差异点
- Integrated track-and-hold (T/H) amplifier eliminates external sample-and-hold stage （对比 MX7820KEWP+)
- B-grade upgrade option with ±0.5 LSB integral linearity in identical footprint （对比 MAX150ACWP (this part))
- RoHS-compliant '+' suffix variant maintains SOIC-20 footprint while supporting modern lead-free assembly （对比 MAX150ACWP (this part))
设计说明
Place a 10 µF tantalum (or low-ESR ceramic equivalent) decoupling capacitor in parallel with a 0.1 µF ceramic capacitor as close as possible to the MAX150ACWP VDD pin. Use a wide power-plane trace to minimize series inductance, since switching transient currents during conversion can briefly draw peaks above the 40 mW typical average and create ground-bounce that degrades the last LSBs. According to the Maxim datasheet, the reference pin (VREF) also requires its own bypass — a 0.1 µF ceramic or larger directly at pin 1 to ground.
Keep AGND (analog ground) and DGND (digital ground) returns as separate traces back to a single point at the regulator output, never mixing them under the SOIC-20 footprint. Route DB0-DB7 digital outputs away from AIN and VREF analog traces to avoid digital noise coupling into the analog input, since at 8-bit resolution each LSB is ~19.5 mV (5 V / 256) and is easy to corrupt by digital switching transients. Maintain solid copper pour on the analog layer to provide low-impedance return paths for the analog input source.
Estimated: For the MAX150ACWP's 1.34 µs conversion time and 8-bit half-flash architecture, the input bandwidth of the internal T/H must be respected — driving AIN from a high-impedance source (e.g., >10 kΩ) without a buffer op-amp will cause -3 dB bandwidth roll-off and degrade SNR. Do not forget that the MX7820/MAX150 family has separate analog and digital ground pins, both of which MUST be returned to the same ground star-point, not connected at random points on the PCB. Always sample more than one conversion and average if the analog input is in a noisy environment, even though the T/H handles many GHz of digital noise from the host microprocessor.
合规信息
The MAX150ACWP base part number (without '+') is a legacy Maxim non-RoHS variant; the MAX150ACWP+ and +T variants are RoHS-compliant per Maxim/ADI ordering suffixes. The MAX150ACWP family is NOT AEC-Q100 qualified - use MAX1304ECM/V+ or MAX1309ECM/V+ for AEC-Q100 automotive applications. All compliance fields not explicitly documented in the verified web data are marked [DATA_NEEDED].
