ADS8344NB - 16-Bit 8-Channel 100-kSPS ADC | Texas Instruments
料号： ADS8344NB ✓ 量产中ADS8344NB 概述
An ADC converts continuous analog voltages into numerical values for processing by a microcontroller, digital signal processor, or embedded control system. The ADS8344 belongs to the hierarchy of data-converter ICs, analog-to-digital converters, and SAR converters. Its multiplexer can select eight single-ended inputs or four differential inputs, allowing the same device to support instrument amplifiers, transducers, and multiple analog sensor channels.
Key features include 16-bit resolution, eight-channel single-ended or four-channel differential multiplexing, a maximum conversion rate of 100 kSPS, and 84 dB signal-to-noise-plus-distortion performance. The serial interface reduces the number of PCB connections required for data transfer, while the single-supply architecture simplifies power-system design. The reference voltage can be varied from 500 mV to VCC, producing an input range of 0 V to VREF when the specified input limits are observed.
The ADS8344 uses a successive-approximation conversion architecture. Each conversion resolves the analog input through a sequence of internal bit decisions, then transfers the resulting code through the synchronous serial interface. A shutdown mode can reduce consumption when continuous conversion is unnecessary. Typical operating power dissipation is 10 mW at a 100 kSPS throughput rate with a 5 V supply, reflecting the low-power character of the device.
Typical applications include industrial process monitoring, programmable test equipment, portable measurement instruments, sensor interface modules, medical instrumentation, and data acquisition systems. The eight-channel multiplexer is especially useful when several sensors share one ADC, while differential operation helps reject common-mode noise when the source is balanced.
When laying out a board, keep analog inputs, the reference connection, and the device ground return compact and away from switching nodes. Follow the manufacturer datasheet for reference-capacitor values, input drive requirements, acquisition timing, and the exact pin assignments before finalizing the PCB.
This product summary combines the functional characteristics, package information, comparison points, and design guidance needed to evaluate the ADS8344NB for a new analog-measurement design.
直接替换替代料： ADS8344NB ——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： ADS8344NB （相同外形与封装尺寸） ——差异在于 Package, Resolution, Reference Voltage Range, Typical Power Dissipation, Architecture.
ADS7844E
✅ 直接替换联系询价
查看数据手册 →ADS8343EBG4
✅ 直接替换📋 参考替代料（不在目录中）
ADS8343EBG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS8344NB 最大额定值与电气特性
| 分辨率 | 16 bit |
| Conversion Architecture | Successive-approximation (SAR) |
| Maximum Conversion Rate | 100 kSPS |
| Single-Ended Input Channels | 8 channels |
| Differential Input Channels | 4 channels |
| Signal-to-Noise Plus Distortion | 84 dB |
| Supply Architecture | Single supply, 2.7 V nominal |
| Reference Voltage Range | 500 mV to VCC |
| Unipolar Input Range | 0 V to VREF |
| 接口类型 | Synchronous serial interface |
| Typical Power Dissipation | 10 mW at 100 kSPS and 5 V supply |
| Shutdown Mode | Supported |
| 封装 | 20-pin SSOP |
| Pin Compatibility | Pin-for-pin compatible with ADS7844 |
| 安装类型 | Surface mount |
ADS8344NB 20-pin ssop 引脚配置指南
ADS8344NB（20-pin ssop 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： ADS8344NB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADS8344NB 适用于 6 应用s: Industrial Process Monitoring, Data Acquisition Systems, Precision Test and Measurement, Medical Signal Acquisition, Portable Measurement Instruments, Sensor Interface Modules.
Industrial Process Monitoring
The ADS8344NB fits industrial process monitoring where several analog sensors must be sampled by one compact converter. Its eight single-ended inputs can support pressure, temperature, position, and level signals, while four differential channels can serve balanced instrumentation-amplifier outputs. The 16-bit resolution and 84 dB SINAD are useful when preserving small measurement variations is more important than maximum sampling speed. At up to 100 kSPS, the converter handles fast control or monitoring loops without requiring a parallel data bus. The synchronous serial interface conserves PCB pins and simplifies connection to an embedded controller. Designers should place protection networks appropriately, keep the reference node compact, route analog traces away from switching power nodes, and verify the acquisition timing in the manufacturer datasheet.
推荐
Data Acquisition Systems
The ADS8344NB is appropriate for compact multichannel data acquisition systems that need 16-bit numerical resolution without a high-power parallel ADC. Eight single-ended inputs reduce the number of separate converters required, and the 100 kSPS maximum conversion rate supports acquisition of rapidly changing waveforms. A microcontroller or digital signal processor can receive each result through the synchronous serial interface, reducing connector count and board area. Typical power dissipation of 10 mW at 100 kSPS and a 5 V supply also suits portable or embedded instruments. The front end should provide suitable source impedance and settling time, while grounding, reference bypassing, and analog trace routing must follow the manufacturer's layout guidance to preserve the specified 84 dB SINAD performance.
推荐
Precision Test and Measurement
The ADS8344NB can be used in laboratory and production test equipment for accurate conversion of low-level analog outputs. Its 16-bit resolution provides finer numerical granularity than a 12-bit converter, while the adjustable reference range of 500 mV to VCC allows the analog span to be matched to the source. The eight-channel multiplexer supports sequential measurements of multiple fixtures or standards without requiring eight independent ADC packages. Differential operation can improve rejection of common-mode voltage when the measured source is balanced. System designers must account for input noise, source settling, reference stability, calibration, and grounding. The manufacturer acquisition cycle should be implemented directly because insufficient settling time between channel changes can create conversion errors even when the converter itself meets its specified performance.
推荐
Medical Signal Acquisition
The ADS8344NB may be applied to multichannel medical monitoring and diagnostic-instrument front ends where compact, high-resolution acquisition is valuable. Sixteen-bit conversion and 84 dB SINAD support precision capture of low-amplitude physiological or laboratory signals, while differential channels can reduce common-mode pickup from surrounding equipment. The single-supply operation and 20-pin SSOP package simplify integration into portable systems. Safety, diagnostic claims, and regulatory conformance must be established at the complete-system level rather than inferred from the converter specifications. Analog isolation, patient protection, input filtering, reference quality, and noise control are outside the ADC's basic conversion function and require dedicated engineering. Firmware should also reject implausible results and confirm timing behavior during each acquisition.
推荐
Portable Measurement Instruments
The ADS8344NB fits portable meters and field-measurement products where several sensors must be monitored from a compact, low-power board. The 100 kSPS conversion ceiling provides more than enough bandwidth for many pressure, temperature, flow, and electrical measurements, and the eight-channel multiplexer reduces component count. A typical 10 mW operating dissipation at maximum throughput and a 5 V supply helps limit heat and battery burden. The 16-bit result width preserves fine differences in slowly changing sensor outputs, while the serial interface avoids a wide parallel connector. Power-gating through shutdown can reduce consumption during idle periods. Battery noise, reference drift, sensor excitation settling, and ground-bounce effects still need to be evaluated because converter accuracy depends on the complete analog signal chain.
推荐
Sensor Interface Modules
The ADS8344NB is well suited to compact sensor-interface modules that combine several input channels with a host processor. Four differential channels can accept balanced outputs from suitable sensor amplifiers, while eight single-ended inputs can support resistive, voltage, or conditioned sensor signals. The 16-bit conversion resolution and 84 dB SINAD help retain useful detail after digital processing, and the synchronous serial interface minimizes wiring between the converter and controller. Input conditioning remains essential: selected channels should be scaled within the 0 V to VREF range when unipolar operation is used, and differential inputs must remain within the device's permitted common-mode range. Add filtering, clamping, and ESD protection as required, and use the manufacturer reference network and layout recommendations to avoid introducing noise or conversion errors.
推荐
推荐产品汇总
工程参考数据： ADS8344NB ——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 | ADS7844 | ADS8343EBG4 | ADS8343EBG |
|---|---|---|---|---|
| Package | SSOP-20 | SSOP-20 | SSOP-20 | SSOP-20 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
关键差异点
- Higher conversion resolution than the pin-compatible ADS7844 （对比 ADS7844)
- Specified dynamic performance for precision acquisition （对比 ADS7844)
- Direct PCB compatibility without changing the package footprint （对比 ADS7844)
设计说明
Route the eight analog inputs directly from their connector or sensor-conditioning stages to the corresponding ADC pins without long shared traces. Keep the reference network and reference bypass capacitor close to the device, and return analog ground through a compact path to the device ground pin. These layout practices are especially important because the specified 84 dB SINAD includes the effects of noise and reference behavior under the manufacturer's recommended operating conditions.
Use the manufacturer's acquisition timing and source-impedance guidance when switching channels. The converter may need additional settling time after a multiplexer transition, particularly with high-impedance sensors or resistive dividers. If necessary, add a low-noise buffer close to the input, but account for its offset, noise, settling behavior, and power consumption. Correct digital timing cannot recover an analog value that was not fully settled when conversion began.
Provide a quiet low-impedance supply because supply variation can disturb conversion accuracy and the reference range is tied to VCC. Follow the datasheet's bypass and decoupling values, place the capacitors at the relevant pins, and keep analog and digital return currents separated where practical. The typical 10 mW dissipation at 100 kSPS and 5 V is low, but accuracy can still be limited by reference noise, supply ripple, or poor grounding.
合规信息
The ADS8344NB is associated with a 20-pin SSOP package and an industrial-grade ordering code, but specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations require confirmation from the manufacturer product documentation.