ADS8344E - 16-Bit 100-kSPS 8-Channel SAR ADC | Texas Instruments
MPN: ADS8344E ✓ فعالADS8344E نمای کلی
An SAR ADC is a sampling analog-to-digital converter that compares the input voltage with an internal DAC during successive clock cycles. Each cycle resolves one additional bit, allowing the ADS8344E to deliver 16-bit resolution at 100 kSPS. Its eight-channel input multiplexer makes it part of the ADC → data converter → mixed-signal acquisition hierarchy used for portable instruments, multichannel measurement systems, battery-operated data loggers, and isolated remote data-acquisition equipment.
The principal features include eight single-ended inputs, support for four differential inputs, a 100-kSPS conversion rate, 84 dB signal-to-noise-plus-distortion, and a low-noise synchronous serial interface. The four-wire interface uses separate clock, data input, data output, and chip-select signals. According to the manufacturer datasheet, digital inputs are overvoltage tolerant to +5.5 V regardless of the +VCC supply, which simplifies mixed-voltage digital interfacing.
Typical power dissipation is 10 mW when operating at the 100-kSPS throughput rate with a +5 V supply. The device also includes a shutdown mode that reduces power dissipation when conversion activity is not required. The external VREF may vary from 500 mV to VCC, with the corresponding input range extending from 0 V to VREF. This adjustable range allows the converter to use the full span of a system reference instead of accepting only a fixed full-scale input.
The ADS8344E is suitable for portable data loggers, personal digital assistants, measurement equipment, and low-cost isolated remote data-acquisition systems. In a multichannel logger, its on-board multiplexer reduces the number of external analog switches, while the four-wire synchronous interface simplifies communication with a microprocessor or programmable controller.
When designing the input network, preserve the relationship between VREF and the accepted analog range, account for input settling time between channel selections, and place reference and interface-trace capacitance close to the device. For isolated acquisition, place the serial interface across the isolation barrier and verify that the controller meets the input timing and logic-level requirements.
This product record combines manufacturer specifications, distributor availability references, package information, and verified same-family alternatives. It also identifies the unresolved items that must be checked against current distributor pricing and the complete manufacturer datasheet before a production design is released.
جایگزین‌های drop-in برای ADS8344E — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
ADS8344EB
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8344EBG4
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8344E حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 16 bit |
| Conversion Rate | 100 kSPS |
| Architecture | Successive-approximation register (SAR) |
| Input Channels | 8 channels |
| Single-Ended Input Configuration | 8 channels |
| Differential Input Configuration | 4 channels |
| Input Type | Single-ended inputs |
| Signal-to-Noise Plus Distortion | 84 dB |
| Typical Power Dissipation | 10 mW at 100 kSPS and +5 V supply |
| Reference Voltage Range | 500 mV to VCC |
| محدوده ولتاژ ورودی | 0 V to VREF |
| Supply | +5 V |
| Serial Interface | Four-wire synchronous serial interface |
| Digital Input Overvoltage Tolerance | +5.5 V regardless of +VCC |
| محدوده دمای کاری | -40 °C to +85 °C |
| بسته‌بندی | 20-SSOP |
| Available Package Options | QSOP-20 and SSOP-20 |
| Shutdown Mode | Supported |
| نوع نصب | Surface mount |
راهنمای پیکربندی پین ADS8344E qsop-20 and ssop-20
پیکربندی پین برای ADS8344E (پکیج qsop-20 and ssop-20). 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 ADS8344E.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
ADS8344E مناسب است برای 6 کاربردs: Portable Multichannel Data Logger, Battery-Powered Measurement Instrument, Industrial Process Monitoring, Remote Isolated Data Acquisition, Precision Analog Signal Acquisition, Portable Personal Digital Assistant.
Portable Multichannel Data Logger
The ADS8344E fits portable data loggers because it combines eight single-ended inputs, 16-bit conversion, and a 100-kSPS throughput rate in a 20-SSOP package. Its verified 10 mW typical dissipation at a +5 V supply and 100 kSPS helps limit energy use in battery-operated equipment, while shutdown mode can reduce consumption during idle intervals. The onboard multiplexer also reduces external analog-switch requirements. Design the reference source for stable operation, allow adequate settling after channel selection, and use the synchronous serial interface to transfer each conversion efficiently to a low-power controller.
پیشنهادی
Battery-Powered Measurement Instrument
The ADS8344E is appropriate for battery-powered measurement instruments that require several analog channels without a large external mux. Its eight single-ended inputs can be configured for four differential channels, giving designers flexibility for sensor and transducer measurements. The 100-kSPS rate supports general-purpose process and instrumentation signals, while the 16-bit result provides fine numerical resolution. At a +5 V supply, typical dissipation is 10 mW at full stated throughput; shutdown mode can lower consumption between measurement bursts. The system should account for input bandwidth, settling time, and reference accuracy.
پیشنهادی
Industrial Process Monitoring
The ADS8344E can monitor multiple low-bandwidth industrial signals when the design requires 16-bit readings at up to 100 kSPS. Eight single-ended channels provide a compact way to collect pressure, temperature, position, or analog-control feedback, while differential operation supports four noise-sensitive channels. The manufacturer-rated 84 dB SINAD provides a defined signal-integrity reference, and the four-wire synchronous interface simplifies deterministic sampling. Industrial implementations should isolate the analog front end from switching noise, use a stable low-impedance VREF source, and verify common-mode and input-range requirements for every connected sensor.
پیشنهادی
Remote Isolated Data Acquisition
The ADS8344E supports remote data-acquisition systems where an analog front end is separated from a controller by an isolation barrier. Its four-wire synchronous serial interface can carry conversion activity across the barrier, while eight local channels reduce the amount of analog wiring at the remote end. The manufacturer specifically identifies low-cost isolation for remote data acquisition as an application. The 16-bit, 100-kSPS converter and 10 mW typical dissipation at +5 V are useful for isolated battery-powered endpoints. The isolation components, clock arrangement, and ground strategy must be selected independently because they are not part of the ADS8344E.
پیشنهادی
Precision Analog Signal Acquisition
The ADS8344E is useful when a system needs 16-bit numerical resolution across several analog inputs rather than only a high-speed waveform conversion. The selectable 500 mV to VCC reference range lets the designer scale the accepted 0 V to VREF input span, and 84 dB SINAD provides a manufacturer-specified noise metric for acquisition-quality assessment. Eight single-ended or four differential inputs make the converter suitable for laboratory and control measurements. To realize the available resolution, keep traces short, provide stable reference bypassing, control source impedance, and allow sufficient acquisition settling after multiplexer transitions.
پیشنهادی
Portable Personal Digital Assistant
The ADS8344E is explicitly suited to battery-operated personal digital assistants because it integrates an eight-channel multiplexer, a 16-bit SAR converter, and a synchronous serial interface while consuming a typical 10 mW at a +5 V supply and 100-kSPS throughput. A portable product can use the eight analog inputs for external sensors, controls, or resistive touch interfaces and can invoke shutdown between active measurement periods. The system-level power budget should include interface activity and any external reference or signal-conditioning circuitry. Firmware must also issue the required conversion and chip-select timing described in the manufacturer datasheet.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ADS8344E — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ADS8344EB | ADS8344EBG4 |
|---|---|---|---|
| Package | SSOP-20 (20-SSOP) | SSOP-20 (20-SSOP) | SSOP-20 (20-SSOP) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit |
| Architecture | SAR | SAR family | SAR family |
| Input Channels | 8 single-ended or 4 differential | 8 single-ended or 4 differential | 8 single-ended or 4 differential |
| Serial Interface | Four-wire synchronous serial interface | Four-wire synchronous serial interface | Four-wire synchronous serial interface |
تفاوت‌های کلیدی
- Eight-channel input integration (در مقابلADS830EG4)
- Direct same-family ordering options (در مقابلADS8344EBG4)
- Documented pin compatibility with ADS7844 family (در مقابلADS7844EG4)
یادداشت‌های طراحی
Account for the multiplexer's settling time when switching among the eight single-ended inputs or four differential pairs. Place the analog source and any conditioning network close enough to the converter for the selected source impedance, and verify the acquisition timing against the manufacturer datasheet. For differential operation, provide symmetric routing and appropriate input common-mode range. Long, high-impedance traces can increase settling error and prevent the converter from realizing its nominal 16-bit performance.
Keep the VREF connection, reference bypass capacitor, analog inputs, and ground return compact and away from switching-converter nodes and fast digital clocks. The VREF range is 500 mV to VCC, and the input range is 0 V to VREF, so reference accuracy and stability directly establish the measurement scale. Confirm the recommended capacitor values and layout in the complete manufacturer datasheet before releasing the PCB.
The verified typical dissipation is 10 mW at 100-kSPS throughput with a +5 V supply. Shutdown mode can reduce consumption when the converter is idle, but a complete low-power design must also account for the reference source, controller interface activity, and external signal-conditioning devices. Do not size the power budget from the ADC rating alone; calculate the average current from the actual conversion duty cycle and operating state.
Do not treat ADS7844 or another related converter as a drop-in alternative without checking its physical package. The verified family relationship states pin-for-pin compatibility with ADS7844, but the supplied description associates ADS7844 with a 20-lead QSOP while ADS8344E is ordered as 20-SSOP. A footprint mismatch prevents PCB reuse. Also observe the stated +5.5 V tolerance for digital inputs rather than assuming every interface pin has the same absolute limit.
اطلاعات انطباق
The supplied search results do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. ADS8344E is a general-purpose analog-to-digital converter, so AEC-Q100 is not applicable based on the available information.
