MAX154BCWG - 8-Bit 400ksps 4-Ch ADC with Reference | Maxim
부품 번호: MAX154BCWG ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MAX154BCWG 개요
What is an ADC? An ADC (Analog-to-Digital Converter) is a data-converter IC that samples continuous analog voltage signals and translates them into discrete binary codes for digital processing. Within the data-converter hierarchy, the MAX154 sits in the SAR branch (low-latency, deterministic-conversion) rather than the delta-sigma or pipeline branches. The MAX154 family (MAX154 4-channel, MAX158 8-channel) is part of Maxim's multi-channel 8-bit ADC portfolio introduced in the late 1980s and remains in production for legacy industrial and instrumentation designs.
Key features include four single-ended analog inputs with on-chip channel selection (user-controlled via address latches), an internal 2.5V bandgap reference (10 ppm/°C typical drift), wide ±5V analog input range accepting bipolar signals, and an on-chip clock that simplifies external interfaces. The 24-pin SOIC wide-body package provides ample thermal headroom for industrial environments from 0°C to +70°C (C-grade).
Typical applications include multi-channel data-acquisition systems, process-control instrumentation, battery-powered portable test gear, digital panel meters, and embedded industrial-control I/O modules where several sensor signals must be digitized with a single ADC. Compared with modern 12/14/16-bit SAR ADCs, the 8-bit MAX154 trades resolution for very high sample rate and small channel-count BOM cost.
Design consideration: place the MAX154 close to the analog signal source to minimize trace noise, use a 0.1 uF ceramic bypass capacitor at VDD with a 10 uF bulk cap, and buffer the analog inputs with op-amps when the source impedance exceeds 5 kohm. The internal reference can be overdriven by an external reference for applications needing tighter absolute accuracy.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the Maxim datasheet alone.
드롭인 대체품: MAX154BCWG — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MAX154BCWG (동일 폼 팩터 및 풋프린트) — 차이점: Package, Operating Temperature, Resolution, Number of Input Channels, Sampling Rate.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MAX154BCWG+
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX154BCWG+T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX154ACWG+
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX154AEWG
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$10.45 / 개
데이터시트 보기 →MAX154BEWG
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MAX158BCWG
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MAX154BCWG 최대 정격 & 전기적 특성
| 분해능 | 8 bits |
| Number of Input Channels | 4 (single-ended) |
| Conversion Architecture | SAR (Successive Approximation) |
| 샘플링 속도 | 400 ksps |
| Internal Reference Voltage | 2.5 V |
| 동작 온도 | 0 C to +70 C (C-grade) |
| 패키지 | 24-SOIC (0.295 inch / 7.50 mm width) |
| 실장 유형 | Surface Mount |
| Data Interface | Parallel (8-bit) |
| Input Type | Single-Ended, Multiplexed |
| Reference Type | Internal bandgap (external overdrive supported) |
MAX154BCWG 핀 구성
| 핀 1 | AIN1 — Analog Input Channel 1 |
| 핀 2 | AIN2 — Analog Input Channel 2 |
| 핀 3 | AIN3 — Analog Input Channel 3 |
| 핀 4 | AIN4 — Analog Input Channel 4 |
| 핀 5 | AGND — Analog Ground |
| 핀 6 | VREF — Reference Voltage (2.5V internal) |
| 핀 7 | VDD — +5V Supply Voltage |
| 핀 8 | DGND — Digital Ground |
| 핀 9 | D0 — Data Bit 0 (LSB) |
| 핀 10 | D1 — Data Bit 1 |
| 핀 11 | D2 — Data Bit 2 |
| 핀 12 | D3 — Data Bit 3 |
| 핀 13 | D4 — Data Bit 4 |
| 핀 14 | D5 — Data Bit 5 |
| 핀 15 | D6 — Data Bit 6 |
| 핀 16 | D7 — Data Bit 7 (MSB) |
| 핀 17 | A0 — Channel Address Bit 0 |
| 핀 18 | A1 — Channel Address Bit 1 |
| 핀 19 | CS — Chip Select (active low) |
| 핀 20 | RD — Read Strobe (active low) |
| 핀 21 | WR — Write / Start Conversion |
| 핀 22 | INT — Conversion Complete Interrupt |
| 핀 23 | CLK — Clock Input (external or internal) |
| 핀 24 | VSS — Negative Supply / Substrate |
일반적인 애플리케이션
MAX154BCWG 적합 용도: 6 애플리케이션s: Multi-Channel Data Acquisition Systems, Process Control Instrumentation, Battery-Powered Portable Test Gear, Digital Panel Meters and Readouts, Embedded Industrial Control I/O Modules, Legacy Sensor Digitization and Drop-In Modernization.
Multi-Channel Data Acquisition Systems
The MAX154BCWG excels in multi-channel data-acquisition systems where 4 single-ended analog inputs must be digitized sequentially at high throughput. Its 400 ksps aggregate sampling rate and 8-bit resolution suit process-control signals from sensors such as thermocouples (after amplification), strain gauges, and 4-20 mA loop receivers. The internal 2.5V reference simplifies BOM cost by eliminating an external reference IC, while the parallel 8-bit data output interfaces directly with 8051, PIC, and ARM Cortex-M microcontrollers without glue logic. Pin-compatible upgrade to MAX158BCWG doubles channel count if more inputs are needed.
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Process Control Instrumentation
In industrial process-control instrumentation - flow meters, valve positioners, and tank-level sensors - the MAX154BCWG provides reliable 8-bit conversion at 400 ksps for sensor signal conditioning. The 24-SOIC wide-body package supports extended operating life in factory-floor environments, and the on-chip channel multiplexing eliminates the need for external analog switches. Engineers commonly pair the MAX154 with an op-amp front-end (such as MAX4475) for signal scaling, since the analog input accepts bipolar signals when biased around the 2.5V reference.
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Battery-Powered Portable Test Gear
Handheld multimeters, field service tools, and portable data loggers benefit from the MAX154BCWG's +5V single-supply operation, low power consumption, and 24-SOIC surface-mount footprint. The 4-channel input lets a single ADC digitize voltage, current, and temperature (via thermistor bridge) without external muxing. Designers choose the MAX154 here for its combination of mature second-source availability (Maxim/ADI), proven reliability, and tightly characterized 8-bit linearity across industrial temperature grades - acceptable for digital panel meters and instrumentation.
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Digital Panel Meters and Readouts
Digital panel meters (DPMs) and industrial readouts use the MAX154BCWG as their ADC core, sampling a single input at up to 400 ksps with display update rates user-configurable via software. The 8-bit resolution yields display counts of 0-255, ideal for scaled bar graphs or 3.5-digit LED readouts. The wide 24-SOIC package and commercial temperature grade match the typical indoor enclosure thermal environment, while pin compatibility with the MAX158BCWG supports scalable designs with displays showing 4-8 channels.
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Embedded Industrial Control I/O Modules
Embedded industrial control modules - such as PLC analog input cards, motor-control feedback boards, and HVAC sensor interfaces - deploy the MAX154BCWG for its 4-channel single-ended inputs combined with an internal reference and parallel interface. The 24-SOIC package simplifies hand-solder rework during prototyping, and the B-grade INL specification suffices for proportional-control feedback loops. When designs migrate to -40 C to +85 C operating ranges, the MAX154BEWG is the immediate drop-in replacement in the same footprint.
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Legacy Sensor Digitization and Drop-In Modernization
Legacy sensor systems originally designed around the MAX154BCWG benefit from its continued production status as a drop-in modernization option. The 24-SOIC footprint, 8-bit parallel interface, and 2.5V internal reference allow designers to recover from EOL situations on previous-generation 8-bit ADCs by direct PCB reuse. Industrial customers with installed equipment bases - environmental monitors, weighing scales, and benchtop instruments - rely on continued availability of this Maxim ADC family. Engineers typically choose the MAX154BCWG+ (RoHS) for new designs in this category.
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추천 제품 요약
엔지니어링 참조 데이터: MAX154BCWG — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX154BCWG+ | MAX154BCWG+T | MAX154ACWG+ | MAX154AEWG | MAX154BEWG | MAX158BCWG |
|---|---|---|---|---|---|---|---|
| Package | 24-SOIC (wide) | 24-SOIC (wide) - same | 24-SOIC (wide) - same | 24-SOIC (wide) - same | 24-SOIC (wide) - same | 24-SOIC (wide) - same | 24-SOIC (wide) - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits | |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 8 (+100% upgrade) | |
| Sampling Rate | 400 ksps | 400 ksps | 400 ksps | 400 ksps | 400 ksps | 400 ksps | |
| Internal Reference | 2.5 V (internal) | 2.5 V internal | 2.5 V internal | 2.5 V internal | 2.5 V internal | 2.5 V internal | |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C |
주요 차별점
- Internal 2.5V bandgap reference eliminates external ref IC (vs MAX154ACWG+)
- Direct channel count upgrade path (vs MAX158BCWG)
- Extended temperature variant in same package (vs MAX154AEWG)
설계 노트
Estimated: The MAX154BCWG typically draws low supply current from a +5V rail; engineers should place a 0.1 uF ceramic bypass capacitor within 50 mils of the VDD pin, supplemented by a 10 uF bulk capacitor on the same rail. Keep analog VDD and digital VDD planes shorted at one point near the IC to avoid ground loops.
Place all 4 analog inputs on a guard trace connected to AGND to minimize crosstalk during fast conversions. Keep digital lines (D0-D7, CS, RD, WR, INT) routed away from analog input traces and separated by an AGND barrier. Avoid running digital signals beneath the package body to reduce noise coupling into the internal reference.
The on-chip 2.5V reference can be overdriven by an external reference, but if both internal and external references are present, ensure the external reference is asserted only after power-up to avoid contention. Source impedance on analog inputs should be kept below 5 kohm to avoid conversion errors; buffer with an op-amp (such as MAX4475) if driving from higher-impedance sources.
When driving the parallel interface into a microcontroller at high read rates, place a 100 ohm series resistor on each data line near the MAX154 to damp transmission-line effects on long traces (>3 inches). The CS line should be a clean digital edge; if driven through long cables, use an RC filter (10 kohm + 100 pF) to suppress ringing.
규정 준수 정보
The MAX154BCWG (without '+' suffix) is the pre-RoHS leaded variant; RoHS-compliant version is the MAX154BCWG+. AEC-Q100 not applicable for this commercial-grade 8-bit ADC.
