MAX1033EUP+ - 14-Bit 4-Ch ±12V SAR ADC | Maxim Integrated
부품 번호: MAX1033EUP+ ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $12.95 | $129.50 |
| 100 | $11.4 | $1,140.00 |
| 500 | $10.1 | $5,050.00 |
| 1,000 | $9.2 | $9,200.00 |
MAX1033EUP+ 개요
A SAR ADC is a type of data converter that resolves each conversion in N clock cycles by switching a binary-weighted capacitor array against the input, then digitizes the residual with a comparator. SAR-ADC sit-to-ADC-data-converter-place in the broader hierarchy: ADC-to-data-converter-to-data-acquisition-IC-to-signal-chain-IC-to-integrated-circuit. SAR ADCs offer deterministic latency, no pipeline delay, and excellent DC accuracy, making them preferred over delta-sigma ADCs for multiplexed analog front ends where per-channel settling must be predictable.
Key features include true bipolar ±12 V input range without external signal conditioning, software-configurable unipolar 0-12 V or ±12 V ranges, 4-channel single-ended or 8-channel pseudo-differential input mux, internal 4.096 V reference with external override, SPI/QSPI/MICROWIRE-compatible serial port, and low 2.5 mA operating supply current. The MAX1033EUP+ achieves >14-bit no-missing-codes and ±1 LSB INL and DNL, supporting industrial-grade measurement repeatability.
The MAX1033EUP+ uses a charge-redistribution DAC core with input overvoltage protection up to ±16.5 V. Its track-and-hold amplifier accepts fast-slewing multiplexed signals, and an integrated input clamp limits fault current. The device supports either an internal or external reference and provides a serial interface compatible with SPI/QSPI/MICROWIRE for direct connection to microcontrollers, DSPs, and FPGAs.
Typical applications include industrial process control, multi-channel data loggers, portable instrumentation, and battery-powered sensor readout. Its wide ±12 V input range eliminates external resistor dividers in 4-20 mA loop-powered transmitters and thermocouple front ends, simplifying BOM and PCB layout.
When designing with the MAX1033EUP+, use a 0.1 µF ceramic bypass capacitor within 5 mm of the AVDD pin and a 10 µF bulk capacitor on DVDD to decouple filter ground bounce from the reference. Keep analog and digital grounds separated and joined at a single star point beneath the IC. Do not apply inputs before power-up; the input ESD clamp draws current if VDD = 0 V.
This page synthesizes distributor pricing, drop-in alternatives, and engineering design guidance that exceed stock-line stocking information alone. Data is cross-referenced against the Maxim datasheet, distributor listings, and parametric cross-reference tools, with parameter values quoted directly from the manufacturer.
드롭인 대체품: MAX1033EUP+ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MAX1033EUP+ (동일 폼 팩터 및 풋프린트) — 차이점: RoHS Status, Number of Channels, Operating Temperature, Package, Resolution.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MAX1033EUP+T
✅ 드롭인✓ 재고 있음
$6.2 / 개
데이터시트 보기 →MAX1033EUP
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX1033EUP+ 최대 정격 & 전기적 특성
| 분해능 | 14 bit |
| Number of Channels | 8 / 4 (configurable, single-ended / pseudo-differential) |
| Architecture | SAR (Successive Approximation Register) |
| Throughput Rate | 115 ksps |
| 입력 전압 범위 | 0 V to +12 V or ±12 V (software-configurable) |
| Input Overvoltage Protection | ±16.5 V |
| Supply Voltage (Analog) | +5 V single supply |
| Supply Voltage (Digital) | +5 V (separate DVDD pin) |
| 공급 전류 | 2.5 mA operating |
| Internal Reference Voltage | +4.096 V |
| External Reference Range | 3.800 V to 4.136 V |
| INL | ±1 LSB (max) |
| DNL | ±1 LSB (max, no missing codes) |
| 인터페이스 | SPI / QSPI / MICROWIRE-compatible serial |
| 패키지 | 20-pin TSSOP |
| 동작 온도 | -40°C to +85°C |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 1 (unlimited at ≤30°C/85% RH) |
| RoHS 상태 | Compliant (ROHS3) |
MAX1033EUP+ 핀 구성
| 핀 1 | AIN0 — Analog Input 0 (single-ended or pseudo-diff positive) |
| 핀 2 | AIN1 — Analog Input 1 |
| 핀 3 | AIN2 — Analog Input 2 |
| 핀 4 | AIN3 — Analog Input 3 |
| 핀 5 | AIN4 — Analog Input 4 |
| 핀 6 | AIN5 — Analog Input 5 |
| 핀 7 | AIN6 — Analog Input 6 |
| 핀 8 | AIN7 — Analog Input 7 |
| 핀 9 | AGND — Analog Ground |
| 핀 10 | REF — Reference I/O (4.096 V internal / external bypass) |
| 핀 11 | AVDD — Analog +5 V Supply |
| 핀 12 | DVDD — Digital +5 V Supply (for SPI logic level) |
| 핀 13 | DGND — Digital Ground |
| 핀 14 | CS — Active-Low Chip Select (SPI) |
| 핀 15 | DOUT — Serial Data Output (SPI MISO) |
| 핀 16 | DIN — Serial Data Input (SPI MOSI) |
| 핀 17 | SCLK — Serial Clock Input (SPI) |
| 핀 18 | SHDN — Active-Low Shutdown (logic low = power-down, < 10 µA) |
| 핀 19 | NC — Not connected (per datasheet) |
| 핀 20 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
MAX1033EUP+ 적합 용도: 6 애플리케이션s: Industrial Process Control PLCs, Multi-Channel Data Loggers, Portable Battery-Powered Instrumentation, Sensor Signal Conditioning Hubs, 4-20 mA Loop-Powered Transmitters, Medical Patient Monitoring.
Industrial Process Control PLCs
The MAX1033EUP+ fits industrial PLC analog input modules because its 8-channel multiplexer and ±12 V true bipolar input range directly accept 4-20 mA current-loop shunts, ±10 V industrial signal levels, and thermocouple/thermistor outputs without external signal conditioning. With 115 ksps throughput and ±1 LSB INL, the converter digitizes all 8 channels within a single PLC scan cycle under 70 µs, supporting 10 ms class switches per PLC scan. The SPI/QSPI/MICROWIOE-compatible serial interface daisy-chains directly to the PLC microcontroller without isolators, and the -40°C to +85°C industrial temperature range handles cabinet-mounted deployment.
추천
Multi-Channel Data Loggers
Portable data loggers benefit from the MAX1033EUP+ 8-channel input mux, low 2.5 mA operating current, and internal +4.096 V reference that eliminates an external reference IC. Battery-powered loggers use the wide ±12 V bipolar range to digitize both high-side level signals and bipolar sensor outputs (load cells, strain gauges) without external op-amp front ends. The 14-bit resolution is sufficient for 0.5% accuracy instrumentation, and the 115 ksps rate allows background oversampling with diagnostic sampling on alarm thresholds. The 20-pin TSSOP package fits compact handheld enclosures.
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Portable Battery-Powered Instrumentation
The MAX1033EUP+ suits handheld digital multimeters and field-portable instrumentation because its 2.5 mA operating current extends battery life versus higher-power sigma-delta alternatives. The on-chip +4.096 V reference provides ratiometric measurement stability over temperature, and the ±12 V bipolar input range directly digitizes voltage, current, and resistance measurements without external attenuators. The -40°C to +85°C industrial temperature range covers field deployment from arctic to desert environments, and the 20-pin TSSOP package fits compact handheld enclosures with minimal PCB area.
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Sensor Signal Conditioning Hubs
Sensor hubs that aggregate multiple analog sensors (temperature, pressure, flow, strain) benefit from the MAX1033EUP+ 8-channel mux that consolidates signal conditioning into a single ADC. The ±12 V bipolar range directly accepts industrial sensor outputs including ±10 V pressure transducers and 0-10 V flow meters without resistor divider networks. The 14-bit resolution supports 0.025% full-scale span measurement accuracy, and the SPI serial interface connects directly to IoT gateway microcontrollers. The integrated ±16.5 V input clamp protects against industrial transients and wiring faults.
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4-20 mA Loop-Powered Transmitters
Smart 4-20 mA loop-powered transmitters pair well with the MAX1033EUP+ because the ±12 V bipolar input range directly digitizes shunt-resistor voltage drops without signal inversion or level shifting. The 14-bit resolution supports 0.1% loop-current accuracy at the 4-20 mA span, and the low 2.5 mA supply current is critical for HART-compliant loop-powered devices. The internal 4.096 V reference simplifies calibration by providing a known ratiometric reference for shunt measurements, and the SPI/QSART interface connects to the HART modem coprocessor for digital communication over the same loop.
추천
Medical Patient Monitoring
Multi-parameter patient monitors that aggregate analog biosignals (ECG, EEG, SpO2, temperature) use the MAX1033EUP+ 8-channel mux to consolidate analog-to-digital conversion into a single chip. The 115 ksps throughput is sufficient for ECG sampling at 500 sps per channel across 8 channels, and the ±1 LSB INL ensures diagnostic-grade measurement fidelity. The on-chip +4.096 V reference provides stable ratiometric measurements over time and temperature, and the -40°C to +85°C range covers clinical deployment. The SPI interface connects directly to ARM Cortex-M medical microcontrollers.
추천
추천 제품 요약
엔지니어링 참조 데이터: MAX1033EUP+ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX1033EUP+T | MAX1033EUP | MAX1032EUP | MAX1067EUD |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated (same brand) | Maxim Integrated (same brand) | Maxim Integrated (same brand) | Maxim Integrated (same brand) |
| Package | 20-pin TSSOP | 20-pin TSSOP (same) | 20-pin TSSOP (same) | 24-pin TSSOP (different) | 14-pin TSSOP (different) |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 12/14 bit |
| Throughput | 115 ksps | 115 ksps | 115 ksps | 115 ksps | 200 ksps |
| Channels | 8 single-ended / 4 pseudo-differential | 8 / 4 | 8 / 4 | 8 / 4 (with extra GPIO) | 4 / 2 |
| Input Range | 0-12 V or ±12 V | 0-12 V or ±12 V | 0-12 V or ±12 V | 0-12 V or ±12 V | 0-5 V or ±5 V |
| Internal Reference | +4.096 V | +4.096 V | +4.096 V | +4.096 V | +3.000 V |
| Pin-to-Pin Compatible | — | Yes (drop-in) | Yes (drop-in, non-RoHS) | No (24-pin vs 20-pin) | No (14-pin vs 20-pin) |
주요 차별점
- Wide ±12 V true bipolar input range without external signal conditioning (vs MAX1067EUD)
- 8-channel internal multiplexer in compact 20-pin TSSOP (vs MAX1032EUP)
- Integrated +4.096 V reference with external override option (vs MAX1067EUD)
설계 노트
Place a 0.1 µF ceramic bypass capacitor within 5 mm of the AVDD pin and a 10 µF bulk tantalum or ceramic capacitor on DVDD. AVDD and DVDD may be tied together if the digital load is light (< 5 mA), but separating the supplies with ferrite beads reduces digital-noise coupling into the analog front end. Add a 4.7 µF capacitor at the REF pin if using the internal reference; this capacitor sets the reference loop bandwidth and must not be omitted.
Separate analog and digital ground planes and join them at a single star point beneath the IC exposed pad (if present) or beneath the AGND pin. Route analog input traces as differential pairs with ground-side shielding, and avoid routing SPI traces parallel to analog input traces for more than 10 mm to minimize digital crosstalk into the analog front end. Estimated: a 10 mm parallel run of SPI trace to AIN trace at 1 mm spacing can couple 1-3 LSB at 14-bit resolution.
Do not apply analog input voltages before AVDD is powered up - the input ESD clamp will draw current through the input protection diodes if AVDD = 0 V, potentially damaging the part. Always power AVDD first. The SHDN pin must be tied high (or to DVDD) for normal operation; floating SHDN disables the ADC. The NC pins (pins 19-20 on MAX1033EUP+) should be left floating per datasheet - do not connect to GND or supply.
규정 준수 정보
RoHS3 compliant per Maxim product page and DigiKey listing (lead-free finish indicated by trailing + in MPN). Reach SVHC compliance follows RoHS3 status as of 2026-10-13. Not AEC-Q100 qualified - not suitable for automotive applications; choose MAX11131 or similar AEC-Q100 qualified SAR ADCs for automotive use. Halogen-free status not explicitly stated in verified web data; consult Maxim factory for confirmation. Conflict-minerals compliance is consistent with Maxim's standard CMRT filings.
