MAX113ENG - 8-Bit 4-Ch 400ksps ADC 1µA Power-Down | Maxim Integrated
부품 번호: MAX113ENG ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.35 | $103.50 |
| 100 | $9.2 | $920.00 |
| 500 | $8.1 | $4,050.00 |
| 1,000 | $7.25 | $7,250.00 |
MAX113ENG 개요
What is an 8-bit half-flash ADC? A half-flash ADC is a type of analog-to-digital converter that uses two parallel 4-bit flash stages plus a digital-to-analog converter (DAC) and subtractor to perform an 8-bit conversion in roughly two comparator bank cycles, achieving tens to hundreds of ns per stage. Positioned in the taxonomy: ADC > data converter > signal chain IC > semiconductor, the half-flash architecture is the same family used by the MAX113's companion MAX117 (8-channel variant) and is well suited for embedded microcontrollers, data loggers, and instrumentation front-ends where medium-speed, low-power conversion is required and 12-16 bit precision is not necessary.
Key features include a parallel microprocessor interface, single-ended analog inputs with external reference, software-configurable unipolar/bipolar input range, and an analog input bandwidth suitable for audio-bandwidth signals. A hardware power-down pin reduces standby current to 1 µA typical, allowing the ADC to be duty-cycled in battery-powered applications. The 24-pin PDIP package provides easy insertion into through-hole prototypes and educational platforms.
The MAX113ENG uses two stacked 4-bit flash ADC sub-blocks plus an internal 4-bit DAC, achieving a total throughput of 400 ksps at 1.8 µs per conversion. The internal track/hold keeps input bandwidth compatible with audio-range multiplexed sources, and the external reference voltage scales the full-scale input range independently of the supply, simplifying ratiometric measurements.
Typical applications include portable data loggers, battery-powered instrumentation, digital panel meters, simple DSP front-ends, and embedded 8-bit MCU analog input modules where a true 12-bit ADC is overkill but a discrete CMOS comparator ladder is too slow. Because of its 24-pin DIP form factor and 3V supply, it is a popular choice for hobbyist and educational hardware.
Designers should add 100 nF decoupling capacitors directly across the VDD and AGND pins and use the PWRDN pin to manage average supply current in duty-cycled systems. The external reference determines absolute accuracy, so a low-drift, low-noise reference such as the MAX6125 or MAX6190 is recommended for instrumentation-grade measurements.
This page synthesizes distributor pricing, drop-in alternatives (MAX113CNG, MAX113CAG, MAX113EAG, MAX113PNG, MAX117), and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: MAX113ENG — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MAX113CNG
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX113CAG
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX113EAG
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX113PNG
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MAX117ENG
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX113ENG+
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX113ENG 최대 정격 & 전기적 특성
| 분해능 | 8 bits |
| Number of Input Channels | 4 single-ended |
| 샘플링 속도 | 400 ksps |
| Conversion Time | 1.8 µs |
| Conversion Architecture | Half-flash |
| 공급 전압 | +3 V (single supply) |
| Power-Down Current | 1 µA typical (PWRDN low) |
| Reference Type | External |
| Input Type | Single-ended |
| Digital Interface | Parallel microprocessor-compatible |
| 동작 온도 범위 | -40 °C to +85 °C (industrial, ENG suffix) |
| 패키지 | 24-pin PDIP (DIP-24) |
| 실장 유형 | Through-hole |
| MSL 레벨 | 1 (unlimited floor life) |
MAX113ENG 핀 구성
| 핀 1 | OUT1 — Digital data output bit 1 (MSB) |
| 핀 2 | OUT2 — Digital data output bit 2 |
| 핀 3 | OUT3 — Digital data output bit 3 |
| 핀 4 | OUT4 — Digital data output bit 4 |
| 핀 5 | OUT5 — Digital data output bit 5 |
| 핀 6 | OUT6 — Digital data output bit 6 |
| 핀 7 | OUT7 — Digital data output bit 7 (LSB) |
| 핀 8 | GND — Analog and digital ground |
| 핀 9 | VREF — External reference voltage input |
| 핀 10 | AIN3 — Analog input channel 3 |
| 핀 11 | AIN2 — Analog input channel 2 |
| 핀 12 | AIN1 — Analog input channel 1 |
| 핀 13 | AIN0 — Analog input channel 0 |
| 핀 14 | MODE — Mode select input |
| 핀 15 | PWRDN — Power-down control (active-low) |
| 핀 16 | INT/RDY — Interrupt/ready output |
| 핀 17 | CS — Chip select input (active-low) |
| 핀 18 | RD — Read strobe input (active-low) |
| 핀 19 | WR — Write/convert-start input (active-low) |
| 핀 20 | A0 — Channel/mode address bit 0 |
| 핀 21 | A1 — Channel/mode address bit 1 |
| 핀 22 | CLK — External clock input |
| 핀 23 | VDD — Positive supply (+3V) |
| 핀 24 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
MAX113ENG 적합 용도: 6 애플리케이션s: Portable Data Loggers, Digital Panel Meters and Instrumentation, Embedded MCU Analog Input Modules, Battery-Powered Sensor Front-Ends, Audio-Bandwidth Signal Digitization, Educational and Hobbyist Electronics Projects.
Portable Data Loggers
Digitize 1-4 sensor channels at up to 400 ksps while drawing microamps of standby current. The MAX113ENG's 1 µA PWRDN current and 8-bit half-flash core are ideal for battery-powered logging: it can be cycled into shutdown between conversions, then wake in a few µs to capture a sample. Use it for temperature, humidity, pressure, or strain-gauge bridge digitizers with an external reference tied to VDD for ratiometric readout. The 4 single-ended channels handle multiplexed thermocouples via a low-cost external MUX.
추천
Digital Panel Meters and Instrumentation
Drive 7-segment or LCD readouts in DMMs, panel meters, and bench instruments with a clean 400 ksps digitizer channel. The MAX113ENG's parallel interface feeds a microcontroller or display driver directly without an SPI burden, and the 8-bit resolution is sufficient for 0-99 reading displays and bargraph indicators. Industrial temperature (E suffix) supports factory-floor enclosures without special cooling. Use the PWRDN pin between conversions for battery-powered handheld meters with one year battery life.
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Embedded MCU Analog Input Modules
Bring 4 analog signals into 8-bit microcontrollers (8051, PIC, AVR) without using the MCU's internal ADC if extra speed or external reference is needed. The MAX113ENG's parallel bus interface maps cleanly onto an external memory-mapped I/O port, and the 1.8 µs conversion time easily keeps up with 10-50 kHz control loops. Industrial -40 to +85 °C temperature range supports automotive underhood and outdoor environments. Pair with a low-cost 8-bit MCU and external reference for complete ADC data-acquisition front-ends.
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Battery-Powered Sensor Front-Ends
Run from a single 3 V lithium cell with the PWRDN pin duty-cycling the ADC to extend battery life. The 1 µA shutdown current adds negligible drain to coin-cell budgets; only the microcontroller standby current matters. Tie REF to VDD for ratiometric measurement of thermistors, photocells, or potentiometer positions, or use a buffer-fed reference for absolute measurements. Half-flash architecture keeps active current modest and conversion deterministic for time-stamped sensor logs. Pair with a low-power MCU for complete IoT sensor nodes.
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Audio-Bandwidth Signal Digitization
Capture audio-bandwidth signals up to ~150 kHz thanks to the 400 ksps throughput of the MAX113ENG. The half-flash architecture provides fast conversion with simpler aliasing analysis than successive-approximation ADC, although it lacks an internal anti-aliasing filter. Use a 10 kHz low-pass input filter and external op-amp driver (e.g., MAX4475) to condition microphone-level or line-level audio before the AIN pins. Industrial temperature and 24-pin PDIP form factor make it ideal for quick prototyping of audio effects and consumer audio products.
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Educational and Hobbyist Electronics Projects
Teach ADC concepts in undergraduate EE labs and maker projects with the MAX113ENG's breadboard-friendly 24-pin PDIP footprint. The datasheet's parallel microprocessor interface example shows direct connection to 8051, HC11, and PIC microcontrollers - ideal for hands-on labs about conversion architectures, reference voltages, and timing. The 3 V supply is also Arduino and Raspberry Pi friendly via I/O expanders. Use the PWRDN pin to demonstrate duty-cycling and battery-life optimization in coursework on power-aware embedded design.
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추천 제품 요약
엔지니어링 참조 데이터: MAX113ENG — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX113CNG | MAX113EAG | MAX117ENG |
|---|---|---|---|---|
| Brand | Maxim Integrated (ADI) | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | PDIP-24 | PDIP-24 - same | PDIP-24 - same | PDIP-24 - same |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Number of Channels | 4 single-ended | 4 single-ended | 4 single-ended | 8 single-ended |
| Sampling Rate | 400 ksps | 400 ksps | 400 ksps | 400 ksps |
| Conversion Architecture | Half-flash | Half-flash | Half-flash | Half-flash |
| Supply Voltage | +3 V | +3 V | +3 V | +3 V |
| Power-Down Current | 1 µA typical | 1 µA typical | 1 µA typical | 1 µA typical |
| Operating Temperature | -40 °C to +85 °C (industrial) | 0 °C to +70 °C (commercial) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) |
주요 차별점
- 4-channel version of MAX113/MAX117 family with industrial temp range (vs MAX113CNG)
- Half the channel count and firmware footprint of MAX117 for cost-optimized 4-sensor designs (vs MAX117ENG)
- Ultra-low 1 µA power-down current enables long-life battery designs (vs Generic 8-bit ADC competitors)
- RoHS-compliant drop-in variant available as MAX113ENG+ (vs Bare MAX113ENG)
설계 노트
Place a 100 nF ceramic decoupling capacitor as close as possible between VDD (pin 23) and GND (pin 8), plus a 10 µF bulk capacitor on the supply rail. The MAX113ENG draws ~1.6 mA active and 1 µA in power-down; the small package and high transient switching during half-flash conversion means the local decoupling must be tight. Add a small ferrite bead on the digital supply feed to prevent ADC switching noise from corrupting analog channels.
Do not connect AIN0-AIN3 directly to high-impedance sources without an op-amp buffer - the half-flash architecture momentarily pulls charge from the input during conversion and can introduce error. Also, the external reference is critical: any noise on VREF appears directly in the conversion result. Use a low-noise, low-drift reference (MAX6125 or MAX6190) for instrumentation-grade accuracy.
Keep analog and digital grounds separated and join them at a single point (star grounding) near the GND pin. Route digital outputs away from the analog input pins to avoid digital switching noise coupling into the analog signal path. The 24-pin PDIP is forgiving for hand-routed prototypes, but maintain at least 2 mm trace spacing for production boards.
Add a 100 Ω series resistor at each digital output (OUT1-OUT7) to dampen reflections when driving long traces or capacitive loads. The parallel bus transitions simultaneously for all 8 bits - matched trace lengths or slow slew-rate buffers will prevent simultaneous switching noise (SSN) from coupling into the analog front-end. For bus lengths above 50 mm, use a 74HC245 buffer between the ADC and any host microcontroller.
규정 준수 정보
Bare MAX113ENG (no + suffix) is leaded industrial grade; the RoHS-compliant equivalent is MAX113ENG+. REACH compliance per Maxim/ADI product environmental documentation. Not AEC-Q100 qualified - automotive applications should use a different part.
