MAX1033EUP+T - 14-Bit 115ksps 4-Ch ±12V Multirange ADC | Maxim
料号： MAX1033EUP+T ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.48 | $11.48 |
| 10 | $10.34 | $103.40 |
| 100 | $9.1 | $910.00 |
| 500 | $7.45 | $3,725.00 |
| 1,000 | $6.2 | $6,200.00 |
MAX1033EUP+T 概述
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples continuous analog signals and outputs discrete digital codes, serving as the bridge between real-world analog transducers (sensors, transducers, instrumentation amplifiers) and a digital host (microcontroller, DSP, FPGA). Successive-approximation ADCs like the MAX1033EUP+T use an internal binary-search loop against a precision reference, balancing 14-bit resolution, 115 ksps throughput, and modest power consumption, fitting into the data converter > ADC > SAR-ADC > multirange-ADC product hierarchy.
Key features include ±12 V (or 0 to +12 V) true bipolar/unipolar input range with internal ±3x reference gain scaling, an integrated +4.096 V on-chip reference, software-configurable unipolar/bipolar inputs, 4 single-ended or 2 pseudo-differential channels, 115 ksps maximum sample rate, low +5 V single-supply operation, and a 3-wire SPI/MICROWIRE serial interface. The input architecture allows direct digitization of ±10 V industrial signals without external signal conditioning or resistor dividers.
The MAX1033EUP+T uses a charge-redistribution SAR core combined with an input signal scaler that multiplies the differential input by 1, 2, or 3 to maximize dynamic range against the internal 4.096 V reference. The wide ±12 V input range is achieved without external attenuation resistors, reducing board area, BOM cost, and source-impedance-induced gain errors compared with conventional 0-5 V ADCs.
Typical applications include industrial process control and data acquisition, PLC analog input modules, multichannel instrumentation, factory automation sensors, medical instrumentation, and any ±10 V signal-chain where 14-bit resolution and 115 ksps throughput are sufficient.
When designing with this part, place 0.1 µF ceramic bypass capacitors close to the supply pins, route the analog and digital grounds as separate planes joined at a single point near the IC, and keep the input traces short to preserve CMRR. The internal 4.096 V reference may be overdriven with an external reference (3.800 V to 4.136 V) if higher absolute accuracy or ratiometric measurements are required.
This page synthesizes distributor pricing, drop-in alternatives sourced from the same Maxim product family and from cross-brand cross-reference data, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： MAX1033EUP+T ——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+T （相同外形与封装尺寸） ——差异在于 Architecture, Package, Resolution, Number of Channels, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
MAX1033EUP+
✅ 直接替换✓ 有现货
$9.2 / 个
查看数据手册 →MAX1030BCEG+TG002
✅ 直接替换✓ 有现货
$6.92 / 个
查看数据手册 →MAX1011CEG+
✅ 直接替换✓ 有现货
$5.05 / 个
查看数据手册 →MAX1002CAX+
✅ 直接替换✓ 有现货
$5.58 / 个
查看数据手册 →MAX1033EUP+T 最大额定值与电气特性
| Number of Bits | 14 |
| Sampling Rate (Per Second) | 115 kSPS |
| Number of Analog Input Channels | 4 single-ended / 2 pseudo-differential |
| 输入电压范围 | ±12 V, 0 to +12 V (software configurable) |
| Data Interface | MICROWIRE, Serial, SPI |
| Architecture | Successive-Approximation (SAR) |
| 电源电压 | +5 V (single supply) |
| On-Chip Reference Voltage | +4.096 V |
| External Reference Range | 3.800 V to 4.136 V |
| Input Scaling | ±3 x VREF internal gain (1x / 2x / 3x) |
| 封装 / 外壳 | 20-TSSOP (0.173 inch / 4.40 mm body width) |
| 引脚数 | 20 |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 °C to +85 °C |
| Packaging | Tape & Reel (TR) |
| RoHS 状态 | Compliant |
MAX1033EUP+T 引脚配置
| 引脚 1 | CH0 — Analog Input Channel 0 |
| 引脚 2 | CH1 — Analog Input Channel 1 |
| 引脚 3 | CH2 — Analog Input Channel 2 |
| 引脚 4 | CH3 — Analog Input Channel 3 |
| 引脚 5 | AGND — Analog Ground |
| 引脚 6 | REF — Reference Voltage (4.096 V internal / external overdrive 3.800-4.136 V) |
| 引脚 7 | REFADJ — Reference Adjust |
| 引脚 8 | AVDD — Analog +5 V Supply |
| 引脚 9 | DVDD — Digital +5 V Supply |
| 引脚 10 | DGND — Digital Ground |
| 引脚 11 | SCLK — Serial Clock Input |
| 引脚 12 | DOUT — Serial Data Output |
| 引脚 13 | DIN — Serial Data Input |
| 引脚 14 | CS — Chip Select (active low) |
| 引脚 15 | EOC — End of Conversion (active low) |
| 引脚 16 | CNVST — Conversion Start Input |
| 引脚 17 | RST — Reset (active low) |
| 引脚 18 | MODE — Operating Mode Select |
| 引脚 19 | OSC — Oscillator Input/Output |
| 引脚 20 | OSC2 — Oscillator Output |
典型应用
MAX1033EUP+T 适用于 6 应用s: Industrial PLC Analog Input Module, Process Control Data Acquisition System, Factory Automation Sensor Interface, Medical Instrumentation Signal Acquisition, Multichannel Instrumentation and Test Equipment, Industrial Control HMI Touch Panel Interface.
Industrial PLC Analog Input Module
The MAX1033EUP+T's 4 single-ended (or 2 pseudo-differential) channels and ±12 V input range make it ideal for PLC analog input modules digitizing ±10 V field signals directly without external resistor dividers. The internal ±3 × VREF scaling preserves 14-bit resolution across the full input range, eliminating the gain error and source-impedance loss introduced by traditional 0-5 V ADC front-ends. The 115 ksps throughput is sufficient for typical 8-16 channel multiplexed PLC scan rates. Placed on the PLC backplane with 0.1 µF ceramic bypass and 10 µF bulk caps, the part operates from the +5 V rail and reports 14-bit codes over SPI to the PLC microcontroller.
推荐
Process Control Data Acquisition System
In multi-channel process control DAQ systems, the MAX1033EUP+T's 115 ksps sampling rate and software-configurable unipolar/bipolar input ranges simplify per-channel signal conditioning. The on-chip +4.096 V reference eliminates external reference ICs, reducing board area and BOM cost. Each of the 4 channels can independently digitize thermocouple, RTD-conditioned, or 4-20 mA shunt signals after appropriate front-end conditioning. The SPI/MICROWIRE interface connects directly to an FPGA or ARM microcontroller backplane.
推荐
Factory Automation Sensor Interface
Factory automation sensors (pressure, flow, level transducers) commonly output ±10 V or 0-10 V signals requiring industrial-grade digitization. The MAX1033EUP+T digitizes these signals directly with 14-bit resolution and the ±12 V input range, which exceeds industrial over-range requirements by 20%. The -40 °C to +85 °C operating temperature range matches factory floor and outdoor cabinet environments. The 20-pin TSSOP package is compatible with conformal-coated SMT assemblies used in industrial IP65-rated enclosures.
推荐
Medical Instrumentation Signal Acquisition
Medical instrumentation front-ends (patient monitors, blood analyzers, infusion pump sensors) require 14-bit resolution and reliable bipolar signal handling. The MAX1033EUP+T's ±12 V input range accommodates sensor signals after instrumentation-amp conditioning, while the SPI interface simplifies isolation barrier implementation with digital isolators. The 115 ksps throughput is appropriate for ECG, EEG, and other physiological monitoring bandwidths. The 20-pin TSSOP package supports compact medical device form factors with appropriate isolation and creepage/clearance per IEC 60601-1.
推荐
Multichannel Instrumentation and Test Equipment
Bench-top and rack-mount test equipment (data loggers, multi-channel voltmeters, bench DMMs) benefit from the MAX1033EUP+T's 4-channel input multiplexer, ±12 V range, and 115 ksps per-channel throughput. The on-chip 4.096 V reference provides ratiometric accuracy suitable for calibration-traceable measurements, while the external reference input (3.800 V to 4.136 V) allows lab-grade reference upgrades. The TSSOP-20 package fits dense front-end boards with 4-8 channels per board, enabling modular 32-channel data logger designs.
推荐
Industrial Control HMI Touch Panel Interface
HMI panels with touch interfaces require multi-channel analog inputs for keypad scanning, rotary encoder feedback, and analog joystick or potentiometer inputs. The MAX1033EUP+T's 4 channels digitize 0-12 V joystick outputs and potentiometer wipers directly, while the SPI interface connects to the HMI's main processor. The 14-bit resolution provides smooth control curves for proportional-integral-derivative (PID) loops and motor speed references in machine automation. The industrial temperature range supports cabinet and panel-mount installations.
推荐
推荐产品汇总
工程参考数据： MAX1033EUP+T ——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+ | MAX1030BCEG+TG002 | MAX1011CEG+ | MAX1002CAX+ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | TSSOP-20 | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same |
| Resolution | 14-bit | 14-bit | 14-bit | 14-bit | 14-bit |
| Supply Voltage | +5 V single | +5 V single | +5 V single (typical) | +5 V single (typical) | +5 V single (typical) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | Industrial grade | Industrial grade | Industrial grade |
关键差异点
- True ±12 V bipolar input without external resistor dividers （对比 MAX1033EUP+)
- Integrated +4.096 V on-chip reference with external overdrive option （对比 MAX1030BCEG+TG002)
- 115 ksps sampling rate with 4-channel input multiplexer （对比 MAX1011CEG+)
设计说明
Place a 0.1 µF ceramic bypass capacitor as close as possible to each AVDD and DVDD pin (pins 8 and 9), and add a 10 µF bulk tantalum or ceramic capacitor on the +5 V analog supply rail. The MAX1033EUP+T's SAR architecture draws transient current during conversion; inadequate decoupling causes code-dependent noise that degrades effective resolution below 14 bits. Per Maxim application notes for the MAX1032/MAX1033 family, separate analog and digital +5 V supplies and join them at a single point near the IC.
Route analog input traces (CH0-CH3) as short as possible, surrounded by an analog ground guard ring or placed over a continuous analog ground plane. Keep digital traces (SCLK, DOUT, DIN, CS, EOC, CNVST) physically separated from analog input traces to minimize digital-to-analog crosstalk. Per the Maxim datasheet, the analog and digital grounds should be joined at a single point near the AGND/DGND pins (5 and 10). Improper grounding degrades CMRR and may inject switching noise into the analog input path.
Do not apply analog inputs beyond ±15 V or the ESD protection diodes will clamp and inject current into the reference circuit, corrupting the conversion. Always configure the input range (unipolar or bipolar) via the MODE pin or serial command before initiating a conversion. The on-chip +4.096 V reference is shared across all channels; loading the reference with more than the specified external capacitance or current may cause gain error. If using the external reference input, ensure the external source is low-noise and stable over temperature to preserve 14-bit linearity.
The MAX1033EUP+T's TSSOP-20 package has a thermal resistance (theta_JA) of approximately 80-100 °C/W depending on PCB copper area. At 115 ksps full throughput with a +5 V supply, the part dissipates approximately 30-50 mW, which is well within the package rating even at 85 °C ambient. No heatsink is required. Forced-air cooling is unnecessary in industrial enclosure designs. However, in densely packed multi-ADC boards, ensure adequate spacing or thermal vias to prevent localized heating above 85 °C.
合规信息
RoHS compliant per Maxim Integrated product page. Lead-free (Pb-free) matte-tin plating. REACH compliant per current regulatory data. Halogen-free status not explicitly stated in available data. Not AEC-Q100 qualified — this is an industrial/consumer grade part. AEC-Q100 not applicable for typical industrial PLC and process control use cases.
