MAX1134BCAP+ - 16-Bit 150ksps ADC, 3.3V, SSOP-20 | Maxim
料号： MAX1134BCAP+ ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.4 | $114.00 |
| 100 | $10.2 | $1,020.00 |
| 500 | $9.1 | $4,550.00 |
| 1,000 | $8.3 | $8,300.00 |
MAX1134BCAP+ 概述
A SAR ADC is a successive-approximation-register analog-to-digital converter: it converts an analog input voltage into a digital code by performing one bit at a time using a comparator and a digital-to-analog converter (DAC) in a binary-search loop. In the broader component taxonomy, a SAR ADC sits under analog-to-digital converter -> data converter -> mixed-signal IC -> semiconductor. SAR ADCs are valued for deterministic latency, no-pipeline-delay behavior, and high DC accuracy, which makes them preferred over delta-sigma or pipeline ADCs in multiplexed channel-sampling and motor-control applications.
The MAX1134BCAP+ integrates a track/hold amplifier, input scaling network, and clock generator, which eliminates the need for external components and reduces board area. The 150 ksps sampling rate combined with 16-bit resolution provides 91.3 dB theoretical dynamic range. The single 3.3V supply operation simplifies power-tree design in 3.3V-only systems, while the wide digital-interface compatibility (SPI, QSPI, MICROWIRE) allows direct connection to most microcontrollers and DSPs without glue logic.
The MAX1134BCAP+ shares pinout and package with the MAX1135 family members, allowing designers to scale resolution (12/14/16-bit) and sample rate (150/200 ksps) using the same PCB footprint. The 20-pin SSOP (CAP suffix) is a 5.30 mm JEDEC standard body, while the 20-pin SSOP (EAP suffix) is a 7.20 mm JEDEC standard body - these are NOT drop-in compatible.
Typical applications include portable instrumentation, data loggers, process-control front ends, pen-digitizer digitizers, and battery-powered measurement equipment. The wide operating temperature range suits industrial environments.
When designing with this device, place the 0.1 uF decoupling capacitor within 3 mm of the AVDD pin and keep analog/digital ground returns separated until they join at the ADC. Source impedance should remain below the datasheet limit to maintain acquisition time.
直接替换替代料： MAX1134BCAP+ ——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： MAX1134BCAP+ （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Package, Resolution, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
MAX1134BCAP+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1134BCAP
✅ 直接替换📋 参考替代料（不在目录中）
MAX1135BCAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1135BEAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX147BCAP+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1134BCAP+ 最大额定值与电气特性
| 分辨率 | 16 bit |
| Number of Channels | 1 input |
| 采样率 | 150 ksps |
| Architecture | SAR (Successive Approximation) |
| Input Type | Single-ended (with input scaling network) |
| 电源电压 | 3.3 V (single supply, 3.13V typical) |
| Serial Interface | SPI, QSPI, MICROWIRE compatible |
| 封装 | 20-pin SSOP (CAP suffix, 5.30 mm body) |
| Process Technology | BiCMOS |
| Input Scaling Network | Internal |
| Track/Hold Amplifier | Internal (T/H) |
| On-Chip Clock | Yes (internal) |
| 工作温度范围 | -40 C to +85 C (industrial) |
| Pinout | 20-pin SSOP |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
MAX1134BCAP+ 引脚配置
| 引脚 1 | AIN — Analog input (single-ended, internally scaled) |
| 引脚 2 | AGND — Analog ground |
| 引脚 3 | REF — Reference voltage input (internal/external) |
| 引脚 4 | AVDD — Analog 3.3V supply |
| 引脚 5 | DVDD — Digital 3.3V supply |
| 引脚 6 | DGND — Digital ground |
| 引脚 7 | CS — Active-low chip select (SPI) |
| 引脚 8 | SCLK — Serial clock input |
| 引脚 9 | DOUT — Serial data output |
| 引脚 10 | DIN — Serial data input |
| 引脚 11 | SSTRB — Serial-strobe output (conversion complete) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
| 引脚 17 | NC — Not connected (per datasheet) |
| 引脚 18 | NC — Not connected (per datasheet) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
典型应用
MAX1134BCAP+ 适用于 6 应用s: Portable Data Acquisition, Process Control Front End, Pen-Digitizer Tablet Input, Battery-Powered Measurement, Medical Patient Monitoring, Industrial Sensor Signal Conditioning.
Portable Data Acquisition
The MAX1134BCAP+'s single 3.3V supply, 150 ksps throughput, and 16-bit resolution make it ideal for handheld digital multimeters, portable oscilloscope front ends, and field data loggers. Its 91.3 dB theoretical dynamic range captures weak sensor signals (thermocouples, strain gauges) with high fidelity, while the BiCMOS architecture achieves 6 mA typical operating current for extended battery life. Placed at the analog front-end between the input multiplexer and MCU, it directly connects via SPI without external logic, reducing BOM count by 4-6 components versus discrete ADC designs.
推荐
Process Control Front End
The MAX1134BCAP+ is well suited for industrial process control, digitizing 4-20 mA current-loop signals through a 250 ohm sense resistor to give 1-5V input. Its 16-bit resolution and 150 ksps sampling rate provide the precision needed for closed-loop PID control of temperature, pressure, and flow variables. The wide -40C to +85C operating range survives factory-floor environments. Designed between the signal-conditioning amplifier and the PLC or MCU, the part offers SPI-based isolation-friendly serial output that simplifies optocoupler-based noise-immune data transfer to control systems.
推荐
Pen-Digitizer Tablet Input
The MAX1134BCAP+ was originally designed for pen-digitizer digitizers, where its 150 ksps sample rate and 16-bit resolution accurately capture the X-Y position stylus signals from electromagnetic sensing coils. The integrated input scaling network and track/hold amplifier simplify the analog signal chain, while the SPI/QSPI/MICROWIRE-compatible serial interface directly connects to the host microcontroller without external logic. In a typical implementation, the part digitizes one axis while the MCU samples the other, alternating at the 150 ksps rate to maintain smooth cursor tracking.
推荐
Battery-Powered Measurement
The MAX1134BCAP+'s single 3.3V supply operation and 6 mA typical supply current suit battery-powered measurement equipment, including handheld environmental monitors and IoT sensor nodes. The integrated track/hold and clock generator reduce standby power by eliminating external active components. Used with a 3.3V LDO and a low-power MCU, the ADC can be duty-cycled with the EN pin to drop supply current below 1 uA between conversions, extending battery life to 1-2 years on 2xAA cells in periodic-logging applications.
推荐
Medical Patient Monitoring
The MAX1134BCAP+ serves in portable medical devices such as blood-pressure monitors, pulse oximeters, and ECG front-ends where 16-bit resolution captures low-amplitude biosignals (typically 1 mV range). The internal input scaling network accepts signals directly from the instrumentation amplifier, eliminating external op-amp buffers. The 3.3V single-supply rail simplifies medical-device power architectures, while the SPI serial output enables direct connection to medical-grade MCUs for real-time waveform processing and Bluetooth transmission.
推荐
Industrial Sensor Signal Conditioning
The MAX1134BCAP+ is well suited for industrial sensor signal conditioning, digitizing outputs from load cells, RTD temperature sensors, and LVDT position transducers. The 16-bit resolution and 150 ksps sampling rate provide the necessary accuracy for closed-loop control in CNC machines, robotics, and HVAC systems. The internal input scaling network accommodates 0-5V sensor outputs directly. The SPI-compatible serial interface allows direct connection to industrial MCUs, while the -40C to +85C operating range survives harsh factory environments with high EMI and temperature variation.
推荐
推荐产品汇总
工程参考数据： MAX1134BCAP+ ——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 | MAX1134BCAP+T | MAX1134BCAP | MAX1135BCAP+ | MAX1135BEAP+ | MAX147BCAP+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-SSOP (CAP, 5.30 mm) | 20-SSOP (CAP, 5.30 mm) - same | 20-SSOP (CAP, 5.30 mm) - same | 20-SSOP (CAP, 5.30 mm) - same | 20-SSOP (EAP, 7.20 mm) - different body width | 20-SSOP (CAP, 5.30 mm) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 150 ksps | 150 ksps | 150 ksps | 200 ksps | 200 ksps | 133 ksps |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Serial Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
关键差异点
- Single 3.3V supply with 16-bit resolution （对比 MAX1135BCAP+)
- Compact 5.30 mm body SSOP （对比 MAX1134BEAP+)
- Integrated input scaling network （对比 Generic discrete ADC design)
设计说明
The MAX1134BCAP+ operates from a single 3.3V supply. Place a 10 uF bulk tantalum capacitor and a 0.1 uF ceramic decoupling capacitor within 3 mm of the AVDD pin. The DVDD pin can share the 3.3V rail but should have its own 0.1 uF bypass capacitor to prevent digital switching noise from coupling into the analog supply. For best performance, route AVDD and DVDD as separate traces back to a common ferrite-bead-isolated star ground.
Maintain a single solid ground plane under the ADC with separate analog and digital ground returns that join only at the IC ground pins. Route the analog input trace as a differential pair with constant 50 ohm impedance and avoid running it parallel to high-speed digital traces (SCLK, DOUT). Place the external reference bypass capacitor (typically 4.7 uF) within 5 mm of the REF pin. Guard rings around the AIN pin reduce PCB leakage current at high-impedance sensor inputs.
Source impedance at AIN must remain below 1 kohm to maintain the 150 ksps acquisition time. Higher source impedance causes gain error and degraded THD. The internal input scaling network clamps over-voltage events; however, sustained input voltages beyond the absolute maximum rating (AVDD + 0.3V) can permanently damage the ESD cells. For multi-channel applications, add an external analog multiplexer BEFORE the ADC input since the MAX1134BCAP+ is a single-channel part.
The SPI interface runs at up to 4 MHz SCLK; route SCLK, DOUT, and CS as matched-length traces to prevent timing skew. Place a 33 ohm series-termination resistor at the SCLK source if trace length exceeds 50 mm. The DOUT signal should be buffered with a 74LVC245 if driving long cables or multiple slaves, since the MAX1134BCAP+ has limited drive strength (4 mA typical). Use CS as an active-low frame-sync; do not tie CS low permanently or the output register will not update correctly.
合规信息
RoHS and lead-free compliance per Maxim Integrated product markings. Halogen-free status not explicitly stated in available data. Part is not AEC-Q100 qualified - for automotive applications consider AEC-Q100 qualified alternatives.
