ADS8344N - 16-Bit 8-Channel 100-kSPS SAR ADC | Texas Instruments
MPN: ADS8344N ✓ فعالADS8344N نمای کلی
An ADC converts continuous analog voltages into numerical values for processing, measurement, or control. The ADS8344 belongs to the SAR ADC hierarchy, where a successive-approximation internal DAC and comparator determine each output code through successive comparison cycles. Its eight-channel multiplexer supports eight single-ended inputs or four differential inputs, making it useful for multi-sensor instrumentation while keeping the external interface compact.
The converter provides 16-bit resolution, a 100-kSPS conversion rate, and 84 dB SINAD according to the manufacturer datasheet. Its synchronous serial interface provides a straightforward connection to microcontrollers and DSPs. The reference can be varied from 500 mV to VCC, allowing the input span to match the measured signal, while shutdown mode reduces power dissipation when conversion is not required.
The architecture supports conversion of eight single-ended channels or four differential channels at 100 kSPS. A 16-bit result corresponds to 65,536 code levels, making the device suitable for process monitoring, instrumentation, and industrial control systems requiring more resolution than an 8-bit or 12-bit converter. Input settling time, reference quality, source impedance, and serial-clock timing remain critical to accurate results.
Typical uses include sensor-interface boards, industrial measurement systems, battery monitoring, laboratory data acquisition, and embedded control panels. The eight single-ended inputs simplify multiplexed acquisition, while differential operation improves suitability for signals centered around a common reference. The synchronous serial output can connect directly to a compatible microcontroller or digital signal processor.
Design the reference and analog-input networks for low noise and adequate acquisition time, and keep serial clock, chip-select, and data lines away from high-impedance analog inputs. Confirm the SSOP-20 footprint and pin assignment against the manufacturer datasheet before layout because the provided search results do not expose a verified complete pin table.
This page consolidates the verified manufacturer and distributor facts, distinguishes documented capabilities from missing technical data, and provides practical selection, application, and layout guidance. It also avoids presenting unverified equivalents or package variants as drop-in replacements.
جایگزین‌های drop-in برای ADS8344N — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ADS8344N (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Input Type, Mounting Type, Package, Resolution, Typical Power Dissipation.
هیچ جایگزین مستقیمی برای این محصول موجود نیست.
درخواست جایگزینADS8344N حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 16 bit |
| Conversion Rate | 100 kSPS |
| Architecture | Successive-approximation register (SAR), unitless architecture |
| Input Channel Configuration | 8 single-ended or 4 differential channels |
| Input Type | Single-ended or differential analog input |
| محدوده ولتاژ ورودی | 0 V to VREF |
| Reference Voltage Range | 500 mV to VCC |
| Typical Power Dissipation | 10 mW at 100 kSPS and +5 V supply |
| ولتاژ تغذیه | +5 V typical |
| Signal-to-Noise and Distortion | 84 dB SINAD |
| نوع رابط | Synchronous serial interface, unitless |
| Shutdown Function | Yes, unitless |
| بسته‌بندی | 20-pin SSOP |
| نوع نصب | Surface-mount SSOP, unitless |
| Known Pin Compatibility | Pin-for-pin with ADS7844, unitless |
راهنمای پیکربندی پین ADS8344N 20-pin ssop
پیکربندی پین برای ADS8344N (پکیج 20-pin ssop). این قطعه آنالوگ دارای پین‌های ورودی، خروجی و تغذیه است. برای پیکربندی‌های پین offset null، جبران‌سازی و فعال‌سازی به دیتاشیت سازنده مراجعه کنید. ایده‌آل برای مدارهای شرطی‌سازی سیگنال و تقویت‌کننده.
داده پین‌آوت تفصیلی موجود نیست برای ADS8344N.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
ADS8344N مناسب است برای 6 کاربردs: Industrial Process Sensor Acquisition, Battery and Power-System Monitoring, Laboratory Data-Acquisition System, Embedded Control and Instrumentation, Environmental and Condition Monitoring, Audio-Sensor and Analog Signal Measurement.
Industrial Process Sensor Acquisition
The ADS8344N fits industrial process-monitoring systems that must acquire several slowly changing sensor signals through one converter. Its eight single-ended inputs reduce the number of separate ADC packages, while 16-bit resolution provides 65,536 possible codes for precise measurement representation. With a 100-kSPS throughput rate, the device can sample multiple channels while supporting shutdown mode between active measurement periods. The analog frontend should place the selected VREF relationship and 0 V to VREF input span carefully, because sensor excitation, common-mode voltage, source impedance, and grounding determine whether the converter receives a valid signal. A typical design also needs an external reference, input filtering, and a microcontroller that controls channel selection and reads the synchronous serial results.
Battery and Power-System Monitoring
The ADS8344N is suitable for multichannel battery-monitoring equipment that must measure several voltage-related signals with a compact synchronous-serial ADC. Eight single-ended channels can represent individual cell voltages, auxiliary rails, temperature channels, or current-sensor outputs, while the 16-bit result supports detailed digital representation. The reference can range from 500 mV to VCC, allowing designers to scale the input span to the measurement system, and the converter can dissipate 10 mW at 100 kSPS from a typical +5 V supply. Designers should account for the absence of a verified absolute input rating, select appropriately protected front ends, and ensure that each source settles within the acquisition interval before conversion.
Laboratory Data-Acquisition System
The ADS8344N can form the measurement front end of a laboratory data-acquisition system requiring several analog inputs and 16-bit numerical resolution. It supports eight single-ended or four differential channels at up to 100 kSPS, allowing one converter to service multiple transducers or instrumented amplifier outputs. Differential operation is useful when signals are referenced to a common midpoint, while single-ended operation simplifies less demanding channels. The synchronous serial interface is appropriate for a controller capable of controlling chip select and serial clock while receiving conversion data. Practical performance still depends on low-noise reference design, adequate input settling, protection from transients, and isolation where the measured source exceeds the converter’s unspecified absolute input limits.
Embedded Control and Instrumentation
The ADS8344N fits embedded control panels and compact instrumentation systems that acquire analog process variables and transfer them to a microcontroller or digital signal processor. Its 100-kSPS throughput rate supports responsive monitoring without requiring a high-power converter, while 16-bit resolution preserves fine measurement detail. The internal multiplexer can reduce analog front-end duplication by handling eight single-ended sensors or four differential channels. The designer should design around the synchronous serial timing, use a clean and stable reference, and keep digital clock and control traces separated from sensitive input traces. Shutdown mode can reduce consumption during idle intervals, although the provided sources do not specify shutdown current or detailed power-versus-rate behavior.
Environmental and Condition Monitoring
The ADS8344N can support environmental monitoring systems that combine temperature, humidity, light, pressure, and other analog sensor outputs. Eight single-ended inputs allow several sensor channels to share one 16-bit ADC, and the 100-kSPS capability provides more sampling headroom than many slow environmental measurements require. Adjusting VREF from 500 mV to VCC can align the converter span with conditioned sensor outputs, provided the reference remains stable and the input circuitry prevents overvoltage or excessive loading. Because the verified information does not include a temperature range, noise-free-bit rating, or absolute input limits, outdoor or industrial deployment should use the complete manufacturer datasheet and careful sensor protection before release.
Audio-Sensor and Analog Signal Measurement
The ADS8344N may be used for low-bandwidth audio-sensor or analog feedback measurement where multiple single-ended signals must be digitized. Its 84 dB SINAD specification provides a documented conversion-performance figure, while 16-bit resolution and a selectable reference permit a suitably scaled input span. The converter’s synchronous serial interface can carry results to a digital signal processor or embedded controller. This use does not imply high-frequency audio performance: the verified throughput is 100 kSPS, so designers must avoid exceeding that rate and must account for the acquisition interval, input bandwidth, reference noise, and clock jitter. Differential operation can help when the source is centered around a common reference.
داده‌های مرجع مهندسی برای ADS8344N — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول |
|---|---|
| Package | 20-pin SSOP |
| Brand | Texas Instruments |
| Resolution | 16 bit |
| Conversion Rate | 100 kSPS |
| Input Channels | 8 single-ended or 4 differential channels |
| Reference Voltage | 500 mV to VCC |
| Input Voltage Range | 0 V to VREF |
| Typical Power Dissipation | 10 mW at 100 kSPS and +5 V |
| SINAD | 84 dB |
| Interface | Synchronous serial interface |
تفاوت‌های کلیدی
- Broader multiplexed input configuration (در مقابلADS7844)
- Documented conversion performance (در مقابلADS7844)
- Adjustable measurement span (در مقابلADS7844)
یادداشت‌های طراحی
Use a low-noise reference and place its decoupling capacitors close to the reference and supply pins. The verified input range is 0 V to VREF, with VREF adjustable from 500 mV to VCC, so reference drift directly scales the measurement. The stated typical dissipation is 10 mW at 100 kSPS and +5 V, but the supplied data does not include supply-current curves, shutdown current, or temperature limits.
Route the selected analog channel, reference network, ground return, and digital interface according to a mixed-signal layout. Keep the SSOP-20 footprint and pin assignments tied to the current manufacturer datasheet because the supplied excerpts identify both QSOP-20 and SSOP-20 options. Avoid routing serial clock and chip-select traces beneath sensitive input or reference nodes, and use a quiet ground strategy for analog return currents.
Do not assume that every ADS7844 ordering code is an identical ADS8344N replacement. The manufacturer datasheet states that ADS8344 is pin-for-pin compatible with ADS7844, but ADS8344 supports eight single-ended or four differential inputs, while the ADS7844 family is commonly associated with four-channel acquisition. Confirm acquisition time, conversion timing, reference behavior, and analog input limits before substituting.
اطلاعات انطباق
The provided verified search results do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These values remain unknown rather than being inferred from the manufacturer or package.
