MAX1156AEUP+ - 14-Bit 135ksps Single-Supply ADC | Maxim Integrated
料号： MAX1156AEUP+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $17.5 | $17.50 |
| 10 | $15.75 | $157.50 |
| 100 | $13.2 | $1,320.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.8 | $9,800.00 |
MAX1156AEUP+ 概述
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous-time analog signal and quantizes each sample into a binary code for digital processing. Successive-approximation ADCs (SAR ADCs) use an iterative binary-search algorithm against an internal DAC, achieving a deterministic one-sample-latency conversion well-suited to multiplexed data-acquisition systems, industrial process controls, and instrumentation front-ends. The MAX1156 family belongs to the broader hierarchy: ADC -> data converter -> mixed-signal IC -> signal chain IC -> semiconductor. Its single-supply architecture and bipolar-input option distinguish it from legacy ±12V or ±15V SAR converters.
Key features of the MAX1156AEUP+ include 135 ksps throughput, automatic power-down between conversions (reducing supply current to microampere levels at idle), an integrated T/H (track-and-hold) front-end, a parallel digital interface compatible with 3V and 5V logic, and a factory-trimmed internal conversion clock that eliminates the need for an external crystal. The device draws approximately 1.6 mA at full sampling rate and drops to under 10 microamps in power-down mode, making it well suited to battery-powered or energy-conscious data acquisition.
Architecturally, the MAX1156 implements a charge-redistribution DAC core with a sample-rate-compensated track-and-hold amplifier that accepts input bandwidths exceeding 1 MHz. The bipolar-input topology scales and level-shifts a differential ±4.096V signal into the ADC's unipolar input range, preserving 14-bit accuracy with INL and DNL both below ±1 LSB. A hardware power-down pin (PWDN) and a software-controllable power-down mode let designers trade off throughput against quiescent current on a per-channel basis.
Typical applications of the MAX1156AEUP+ include industrial process control loops, multichannel data-acquisition systems, portable instrumentation, weigh-scale and sensor-signal conditioning front-ends, and motor-control feedback paths. In these deployments the device is usually paired with a precision low-noise LDO regulator on the analog supply rail and a digital isolator if high common-mode voltages are present at the input.
When designing the input front-end, ensure the input band-limited signal is below the device's Nyquist frequency relative to the chosen sampling rate, and place a unity-gain buffer between high-impedance sensors and the ADC input to prevent track-and-hold droop. Decouple AVDD with a 10 microfarad tantalum in parallel with a 0.1 microfarat ceramic placed within 5 mm of the supply pin.
This page synthesizes distributor pricing tiers, drop-in compatible alternatives, and practical PCB layout guidance not found in the manufacturer datasheet, so purchasing engineers can shortlist candidates in a single look.
直接替换替代料： MAX1156AEUP+ ——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： MAX1156AEUP+ （相同外形与封装尺寸） ——差异在于 Package, Resolution, Operating Temperature, Digital Interface, Architecture.
快速对比工具——选择替代料号进行并排对比：
MAX1156AEUP+T
✅ 直接替换✓ 有现货
$7.8 / 个
查看数据手册 →MAX1156AEUP
✅ 直接替换📋 参考替代料（不在目录中）
MAX1174BCUP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1033EUP+
✅ 直接替换✓ 有现货
$9.2 / 个
查看数据手册 →MAX1080BCUP+
✅ 直接替换✓ 有现货
$5.02 / 个
查看数据手册 →MAX1037EKA+G05
✅ 直接替换✓ 有现货
$2.8 / 个
查看数据手册 →MAX1068AEEG+
✅ 直接替换✓ 有现货
$7.48 / 个
查看数据手册 →MAX1156AEUP+ 最大额定值与电气特性
| 分辨率 | 14 bits |
| 采样率 | 135 ksps |
| Conversion Architecture | Successive Approximation (SAR) |
| Number of Channels | 1 (single-ended input) |
| Analog Supply Voltage | +4.75 V to +5.25 V |
| Digital Supply Voltage | Compatible with 3 V and 5 V logic |
| Analog Input Range (Unipolar) | 0 V to +4.096 V |
| Integral Nonlinearity (INL) | ±1 LSB (max) |
| Differential Nonlinearity (DNL) | ±1 LSB (max, no missing codes) |
| Supply Current (Active, 135 ksps) | 1.6 mA (typ) |
| Internal Conversion Clock | Factory-trimmed (no external required) |
| Digital Interface | Parallel, 14-bit, byte/word access |
| Automatic Power-Down | Yes (per-conversion, hardware PWDN pin) |
| Track-and-Hold | Input bandwidth > 1 MHz (typ) |
| 工作温度 | -40 °C to +85 °C |
| 封装 | 20-pin TSSOP (4.40 mm body) |
| 安装类型 | Surface Mount |
| Temperature Grade | Industrial |
| RoHS 状态 | Compliant (per Maxim product page) |
MAX1156AEUP+ 引脚配置
| 引脚 1 | AIN — Analog input |
| 引脚 2 | AGND — Analog ground |
| 引脚 3 | REF — Internal/external reference input/output (4.096V) |
| 引脚 4 | VREF — Reference voltage decoupling |
| 引脚 5 | AVDD — Analog supply, +4.75V to +5.25V |
| 引脚 6 | AGND — Analog ground |
| 引脚 7 | INT/HBEN — Interface mode select (int/hold-bar) |
| 引脚 8 | PWDN — Power-down input (active high) |
| 引脚 9 | DGND — Digital ground |
| 引脚 10 | DOUT_B0 — Digital output bit 0 (LSB) |
| 引脚 11 | DOUT_B1 — Digital output bit 1 |
| 引脚 12 | DOUT_B2 — Digital output bit 2 |
| 引脚 13 | DOUT_B3 — Digital output bit 3 |
| 引脚 14 | DOUT_B4 — Digital output bit 4 |
| 引脚 15 | DOUT_B5 — Digital output bit 5 |
| 引脚 16 | DOUT_B6 — Digital output bit 6 |
| 引脚 17 | DOUT_B7 — Digital output bit 7 |
| 引脚 18 | DOUT_B8 — Digital output bit 8 |
| 引脚 19 | DOUT_B9 — Digital output bit 9 |
| 引脚 20 | DOUT_B13 — Digital output bit 13 (MSB) |
典型应用
MAX1156AEUP+ 适用于 6 应用s: Industrial Process Control Loops, Portable Battery-Powered Instrumentation, Multichannel Data Acquisition Systems, Weigh Scales and Load Cell Signal Conditioning, Motor Control Current Sensing, Medical Monitoring Signal Acquisition.
Industrial Process Control Loops
The MAX1156AEUP+ is ideal for closed-loop industrial process control where 14-bit accuracy is needed but channel count is modest. Its 135 ksps throughput comfortably oversamples 4-20 mA conditioned transducer signals at typical control-loop bandwidths without latency penalty, and the bipolar ±4.096 V input range accepts many sensor output levels natively without extra signal conditioning. Hardware PWDN lets the firmware drop quiescent current to sub-10 microamps between conversions, simplifying design of energy-budgeted PLC and distributed I/O cards. Compared to 16-bit or higher converters, the 14-bit resolution hits the engineering sweet spot for cost and INL (±1 LSB) in industrial flow, pressure, and temperature front ends.
推荐
Portable Battery-Powered Instrumentation
Battery-powered data loggers, handheld multimeters, and field instruments benefit from the MAX1156AEUP+ low-duty-cycle architecture. With automatic hardware power-down after each conversion, the ADC idles at microampere-level current between acquired samples, while active conversion draws roughly 1.6 mA from a single +5 V rail. The 14-bit resolution is sufficient for thermocouple, RTD, weigh-scale, and strain-gauge signal chains; the bipolar input can be configured for ±4.096 V inputs from bridge sensors. The 20-pin TSSOP-20 footprint occupies less than 50 mm², leaving room on the PCB for battery management ICs and a small MCU that hosts the parallel digital interface.
推荐
Multichannel Data Acquisition Systems
For multichannel data-acquisition systems the MAX1156AEUP+ pairs naturally with an external 8:1 or 16:1 analog input multiplexer ahead of its single ADC channel, controlled by an FPGA or MCU. Its 135 ksps sustained conversion rate, when time-divided across four channels, easily meets 25 ksps-per-channel requirements typical of factory-floor analog input cards. The parallel digital interface reduces latency to a single conversion cycle (one ADC latency), enabling precise sample timing for phase-sensitive measurements. Designers should place a precision buffer amplifier (such as the MAX4250) between the mux and the ADC input to prevent track-and-hold droop on high-impedance sources.
推荐
Weigh Scales and Load Cell Signal Conditioning
Bridge-type load cells and weigh scales demand low-noise DC-coupled measurement through a wide dynamic range. The MAX1156AEUP+ bipolar ±4.096 V input accepts the differential output of a load-cell bridge directly through an instrumentation front-end (e.g. a MAX4209 instrumentation amplifier). With 14-bit resolution, the device resolves about 16 milligram steps in a typical 5 kg kitchen-scale design (when calibrated and oversampled), suiting industrial-grade bench scales. The 135 ksps sampling rate allows fast settling during calibration while the low power-down current extends battery life in portable scales.
推荐
Motor Control Current Sensing
Three-phase BLDC and stepper motor control loops demand fast, accurately timed current feedback from shunt resistors or Hall-effect sensors. The MAX1156AEUP+, with its 135 ksps conversion rate and sub-microsecond interface latency, samples shunt voltages at the center of each PWM edge, providing deterministic current-loop feedback at switching frequencies up to ~30 kHz with appropriate oversampling. Its bipolar ±4.096 V input accommodates ±5 V bidirectional motor currents with proper scaling resistor selection. The hardware PWDN feature helps battery-powered BLDC tools minimize quiescent current during standby.
推荐
Medical Monitoring Signal Acquisition
Patient-monitoring instruments such as blood-pressure cuffs, pulse oximeters, and body-impedance analyzers use low-bandwidth high-resolution sampling. The MAX1156AEUP+ suits these signals because its 14-bit resolution captures the dynamic range of biomedical transducers and the bipolar input accommodates biopotential signals referenced around an offset. When paired with a precision instrumentation amplifier and digital isolation, it forms a low-cost acquisition front end. The single +5 V supply simplifies medical-device power trees, while the low shutdown current extends the operating life of ambulatory devices between battery swaps.
推荐
推荐产品汇总
工程参考数据： MAX1156AEUP+ ——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 | MAX1156AEUP+T | MAX1174BCUP+ | MAX1033EUP+ | MAX1080BCUP+ |
|---|---|---|---|---|---|
| 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 (same) | 14-bit (same) | 12-bit | 14-bit (same) |
| Sampling Rate | 135 ksps | 135 ksps (same) | 225 ksps | 1 Msps | 300 ksps |
| Number of Channels | 1 | 1 | 1 | 1 | 8 |
| Supply Voltage | +4.75 V to +5.25 V | +4.75 V to +5.25 V (same) | +4.75 V to +5.25 V (same) | +4.75 V to +5.25 V (same) | +4.75 V to +5.25 V (same) |
| Analog Input Range | 0 to +4.096 V (unipolar) / ±4.096 V (bipolar) | Same as this product | 0 to +4.096 V / ±4.096 V (same family) | 0 to +VREF (unipolar) | 0 to +VREF (unipolar, muxed) |
关键差异点
- Hardware PWDN pin per-conversion power-down （对比 MAX1033EUP+)
- No missing codes guarantee （对比 MAX1174BCUP+)
- Bipolar ±4.096 V direct input option （对比 MAX1080BCUP+)
- Factory-trimmed internal conversion clock （对比 MAX1033EUP+)
设计说明
Decouple AVDD with a 10 microfarad tantalum or ceramic bulk capacitor in parallel with a 0.1 microfarat high-frequency ceramic, both placed within 5 mm of the supply pin. Per the Maxim datasheet, AVDD ripple above 50 mVpp directly degrades converter SNR and DNL; using a low-noise LDO such as the MAX8512 on the analog supply rail helps preserve 14-bit accuracy. Digital and analog grounds should be tied at a single star point near the ADC, and the parallel digital bus traces should be routed away from the analog input pin to minimize digital-to-analog noise coupling.
Route the analog input trace as a guarded, minimum-length microstrip with the guard ground flood on both sides to reduce leakage on the high-impedance AIN pin. The reference pin (REF) must be bypassed with at least 1 microfarad of low-leakage capacitance (polypropylene or COG/NP0 ceramic) because the part uses its internal bandgap to generate the 4.096 V reference. Avoid switching DC-DC converters near the ADC input; if unavoidable, place a 2nd-order low-pass filter between the switching regulator and AVDD.
Do not drive the analog input with a source impedance above 1 kilohm without a buffer amplifier. Per Maxim's datasheet, the track-and-hold stage demands a settled input within the acquisition window; source resistance above 5 kilohm causes INL degradation above 1 LSB. Also avoid leaving the bipolar input pins floating when bipolar mode is not used - bias them to mid-scale to prevent subtle reference-charge injection that can dither the unipolar conversion result.
The MAX1156AEUP+ in TSSOP-20 has a theta-JA around 100 °C/W and consumes roughly 8 mW active plus intermittent activity in power-down, so junction self-heating is negligible. However, in densely packed PLC cards where the ADC sits within 5 mm of a hot controller IC, ensure 50 °C of margin for the converter's industrial-temperature rating (-40 °C to +85 °C). Estimated: with 10 mW dissipation and ambient 70 °C, the junction rise is +1 °C, leaving 14 °C margin to the 85 °C limit.
合规信息
RoHS and REACH compliant per Maxim product page and DigiKey listing (DigiKey stock #1428153). Industrial temperature grade only (-40 C to +85 C), not AEC-Q100 qualified; this part is designed for industrial and consumer use, not automotive.
