MAX1033EUP+ - 14-Bit 4-Ch ±12V SAR ADC | Maxim Integrated
料号： MAX1033EUP+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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+ 概述
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.
直接替换替代料： MAX1033EUP+ ——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： MAX1033EUP+ （相同外形与封装尺寸） ——差异在于 RoHS Status, Number of Channels, Operating Temperature, Package, Resolution.
快速对比工具——选择替代料号进行并排对比：
MAX1033EUP+T
✅ 直接替换✓ 有现货
$6.2 / 个
查看数据手册 →MAX1033EUP
✅ 直接替换📋 参考替代料（不在目录中）
MAX1033EUP+ 最大额定值与电气特性
| 分辨率 | 14 bit |
| Number of Channels | 8 / 4 (configurable, single-ended / pseudo-differential) |
| Architecture | SAR (Successive Approximation Register) |
| Throughput Rate | 115 ksps |
| 输入电压范围 | 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) |
| 电源电流 | 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) |
| 接口 | SPI / QSPI / MICROWIRE-compatible serial |
| 封装 | 20-pin TSSOP |
| 工作温度 | -40°C to +85°C |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited at ≤30°C/85% RH) |
| RoHS 状态 | Compliant (ROHS3) |
MAX1033EUP+ 引脚配置
| 引脚 1 | AIN0 — Analog Input 0 (single-ended or pseudo-diff positive) |
| 引脚 2 | AIN1 — Analog Input 1 |
| 引脚 3 | AIN2 — Analog Input 2 |
| 引脚 4 | AIN3 — Analog Input 3 |
| 引脚 5 | AIN4 — Analog Input 4 |
| 引脚 6 | AIN5 — Analog Input 5 |
| 引脚 7 | AIN6 — Analog Input 6 |
| 引脚 8 | AIN7 — Analog Input 7 |
| 引脚 9 | AGND — Analog Ground |
| 引脚 10 | REF — Reference I/O (4.096 V internal / external bypass) |
| 引脚 11 | AVDD — Analog +5 V Supply |
| 引脚 12 | DVDD — Digital +5 V Supply (for SPI logic level) |
| 引脚 13 | DGND — Digital Ground |
| 引脚 14 | CS — Active-Low Chip Select (SPI) |
| 引脚 15 | DOUT — Serial Data Output (SPI MISO) |
| 引脚 16 | DIN — Serial Data Input (SPI MOSI) |
| 引脚 17 | SCLK — Serial Clock Input (SPI) |
| 引脚 18 | SHDN — Active-Low Shutdown (logic low = power-down, < 10 µA) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
典型应用
MAX1033EUP+ 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MAX1033EUP+ ——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 | 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) |
关键差异点
- Wide ±12 V true bipolar input range without external signal conditioning （对比 MAX1067EUD)
- 8-channel internal multiplexer in compact 20-pin TSSOP （对比 MAX1032EUP)
- Integrated +4.096 V reference with external override option （对比 MAX1067EUD)
设计说明
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.
合规信息
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.
