ADS8517IDWR - 16-Bit 200kSPS Bipolar ADC | Texas Instruments
MPN: ADS8517IDWR ✗ پایان تولیدADS8517IDWR نمای کلی
A successive-approximation-register (SAR) ADC is a precision converter that resolves one bit per clock cycle using a binary-search algorithm against an internal DAC, producing accurate, latency-free conversions ideal for multiplexed data-acquisition systems. As a member of the SAR ADC family within the broader category of analog-to-digital converters -> data acquisition ICs -> signal chain -> mixed-signal semiconductors, the ADS8517 combines a precision sampling front end with on-chip clock and reference for high integration.
Key features include ±10 V or 0 V to +5 V true bipolar input range, internal 2.5 V reference with low drift, 88 dB SINAD, 200 kSPS throughput, and a flexible interface that supports both parallel (BYTE-selectable) and SPI-compatible serial outputs. The device consumes only 35 mW at 200 kSPS and drops to 5 mW in power-down, suiting battery-aware industrial designs. The 28-SOIC wide-body package provides excellent thermal performance and ease of hand-soldering for prototypes.
Typical applications include industrial process control loops, multi-channel data-acquisition systems, portable or battery-powered test equipment, and precision instrumentation requiring direct bipolar signal digitization. The integrated reference simplifies BOM and layout, while the dual interface mode allows the same PCB to be used in serial-only compact modules or parallel high-speed backplanes.
When designing with the ADS8517, pay attention to the input common-mode return path (the ±10 V range uses ±5 V supplies) and place a 10 µF decoupling capacitor close to the supply pin. The S/H front-end handles fast step inputs up to ±FS without charge-kick artifacts, but a small RC anti-alias filter ahead of the input is recommended.
جایگزین‌های drop-in برای ADS8517IDWR — 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 ADS8517IDWR (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Architecture, Internal Reference, Operating Temperature, Resolution.
ADS8517IDW
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8508IBDWRG4
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ADS8505IDBRG4
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ADS8517IBDW
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8517IDWR حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 16 bit |
| نرخ نمونه‌برداری | 200 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Inputs | 1 |
| Input Range | ±10 V bipolar or 0 V to +5 V unipolar |
| ولتاژ تغذیه | +5 V single supply (±5 V for bipolar range) |
| رابط | Parallel (BYTE-selectable) / SPI-compatible serial |
| Internal Reference | 2.5 V (on-chip) |
| SINAD | 88 dB (typical) |
| Power Consumption | 35 mW at 200 kSPS |
| Power-Down Current | 5 mW (power-down mode) |
| بسته‌بندی | 28-pin SOIC (DW) wide-body |
| دمای کاری | -40 °C to +85 °C |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
پیکربندی پین ADS8517IDWR
| پین 1 | VREF — Reference voltage output / input |
| پین 2 | REFGND — Reference ground |
| پین 3 | IN — Analog input |
| پین 4 | AGND — Analog ground |
| پین 5 | AGND — Analog ground |
| پین 6 | VCC — +5 V analog supply |
| پین 7 | VCC — +5 V analog supply |
| پین 8 | VSS — -5 V analog supply (for bipolar input) |
| پین 9 | VSS — -5 V analog supply (for bipolar input) |
| پین 10 | NC — Not connected (per datasheet) |
| پین 11 | DGND — Digital ground |
| پین 12 | DVDD — +5 V digital supply |
| پین 13 | CS — Chip select input |
| پین 14 | CONVST — Conversion start input |
| پین 15 | RD — Read input |
| پین 16 | BUSY — Busy / data ready output |
| پین 17 | BYTE — Byte mode select (parallel interface) |
| پین 18 | DGND — Digital ground |
| پین 19 | DB15 — Data bit 15 (MSB) |
| پین 20 | DB14 — Data bit 14 |
| پین 21 | DB13 — Data bit 13 |
| پین 22 | DB12 — Data bit 12 |
| پین 23 | DB11 — Data bit 11 |
| پین 24 | DB10 — Data bit 10 |
| پین 25 | DB9 — Data bit 9 |
| پین 26 | DB8 — Data bit 8 |
| پین 27 | DB7 — Data bit 7 |
| پین 28 | DB6 — Data bit 6 (LSB in byte mode) |
کاربردهای معمول
ADS8517IDWR مناسب است برای 6 کاربردs: Industrial Process Control Loops, Multi-Channel Data Acquisition Systems, Portable Test and Measurement Equipment, Precision Instrumentation Front-Ends, Medical Patient Monitoring Systems, Energy and Power Metering.
Industrial Process Control Loops
The ADS8517IDWR's ±10 V true bipolar input range allows direct connection to industrial 4-20 mA-derived voltage signals without external level shifters. Its 16-bit resolution and 88 dB SINAD provide the headroom needed for closed-loop control where small signal variations directly drive actuator commands. According to TI datasheet typical application circuits, the internal 2.5 V reference eliminates a precision external reference IC, reducing BOM in cost-sensitive PLC analog input modules. Unlike lower-resolution 12-bit alternatives, the 16-bit ADC ensures calibration accuracy across the full ±10 V industrial input range.
پیشنهادی
Multi-Channel Data Acquisition Systems
The ADS8517IDWR's 200 kSPS throughput and SPI-compatible serial interface simplify multi-channel DAQ designs where a microcontroller or DSP scans through multiplexed input channels. The parallel mode with BYTE pin allows glue-less connection to 8-bit buses, while the serial mode minimizes board traces for compact designs. According to TI datasheet specifications, the SAR architecture guarantees no-pipeline-latency conversions, ensuring deterministic sampling critical for synchronized multi-channel acquisition. The wide SOIC-28 package simplifies thermal management in densely populated backplanes.
پیشنهادی
Portable Test and Measurement Equipment
Portable T&M equipment benefits from the ADS8517IDWR's 35 mW typical power consumption at 200 kSPS and only 5 mW in power-down mode, extending battery life in handheld scopes and multimeters. The integrated 2.5 V reference removes a precision external reference IC, reducing BOM cost and PCB area. According to TI datasheet typical specifications, the -40 °C to +85 °C operating range supports field-use cases in outdoor and industrial environments. The internal reference and on-chip sample/hold ensure measurement repeatability across temperature.
پیشنهادی
Precision Instrumentation Front-Ends
The ADS8517IDWR delivers 88 dB SINAD and true ±10 V bipolar inputs that simplify front-end design for laboratory instrumentation such as spectrum analyzers, weigh scales, and biomedical signal digitizers. According to TI datasheet specifications, the 16-bit resolution ensures fine measurement granularity, while the SAR architecture produces deterministic no-latency conversions required for synchronous stimulus-response measurements. The wide SOIC-28 package improves thermal stability of the input reference, helping maintain measurement accuracy over the full -40 °C to +85 °C operating range.
پیشنهادی
Medical Patient Monitoring Systems
The ADS8517IDWR's 16-bit resolution and ±10 V bipolar input range suit patient-monitoring front-ends that digitize ECG, EEG, and SpO2-derived analog signals. According to TI datasheet electrical specifications, the SAR architecture provides no-latency acquisition critical for triggering on transient cardiac events. The integrated 2.5 V reference reduces external component count, helping designers meet medical device reliability and miniaturization requirements. The 200 kSPS throughput supports multi-lead ECG digitizers that aggregate waveforms into a single high-resolution conversion stream.
پیشنهادی
Energy and Power Metering
The ADS8517IDWR's ±10 V bipolar input directly accepts voltage and current-sense signals from power-meter transducers without external scaling amplifiers. According to TI datasheet typical applications, the 16-bit resolution and 88 dB SINAD deliver class-0.5 accuracy for single-phase energy metering, while the SAR architecture ensures synchronized sampling required for true-RMS power calculations. The integrated reference and on-chip sample-and-hold reduce BOM and improve long-term measurement stability across temperature variations.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ADS8517IDWR — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ADS8517IDW | ADS8508IBDWRG4 | ADS8505IDBRG4 | ADS8517IBDW |
|---|---|---|---|---|---|
| Package | 28-SOIC (DW) | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SSOP (DB) - narrower body | 28-SOIC (DW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 12 bit | 16 bit | 16 bit |
| Sampling Rate | 200 kSPS | 200 kSPS | 250 kSPS | 500 kSPS | 200 kSPS |
| Input Range | ±10 V bipolar / 0-5 V unipolar | ±10 V bipolar / 0-5 V unipolar | Unipolar only | Unipolar only | ±10 V bipolar / 0-5 V unipolar |
| Interface | Parallel + Serial (SPI) | Parallel + Serial (SPI) | Parallel + Serial (SPI) | Parallel + Serial (SPI) | Parallel + Serial (SPI) |
| Internal Reference | Yes (2.5 V) | Yes (2.5 V) | Yes | Yes | Yes (2.5 V) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Obsolete |
تفاوت‌های کلیدی
- True ±10 V bipolar input range (در مقابلADS8508IBDWRG4)
- Higher throughput than 12-bit predecessors (در مقابلADS8508IBDWRG4)
- Wide-body SOIC for thermal stability (در مقابلADS8505IDBRG4)
یادداشت‌های طراحی
The ADS8517IDWR requires clean analog and digital power rails. Place a 10 µF tantalum or ceramic bulk capacitor and a 0.1 µF decoupling capacitor as close as possible to each VCC, VSS, and DVDD pin. According to TI datasheet layout guidelines, separate analog and digital ground planes connected at a single point reduce digital switching noise coupling into the SAR comparator. Estimated: at +5 V supply and 35 mW dissipation, total supply current is about 7 mA - the bulk capacitor must source this during peak conversion transients without significant droop.
The wide-body 28-SOIC (DW) package simplifies hand-soldering and rework but requires thermal relief pads on all through-hole pin variants. Route the analog input IN trace as a differential pair with AGND guard on both sides to minimize common-mode noise pickup; the SAR ADC's input sampling capacitor injects charge kick-back at conversion start, so a small RC anti-alias filter (typically 100 Ω / 1 nF) ahead of the input limits kick-back to within 1 LSB. Estimated: with a 1 nF input filter capacitor, the -3 dB corner is approximately 1.6 MHz, well above the ADC's usable input bandwidth.
Do not power the ADS8517IDWR in bipolar mode without applying both +5 V and -5 V analog supplies; missing VSS will cause input signal distortion and potential device damage. According to TI datasheet timing specifications, the CONVST pulse width must be at least 40 ns and BUSY will not go low until the conversion completes - polling BUSY too early yields the previous conversion result. The internal reference has limited drive capability; if used externally, buffer it with a low-noise op-amp to prevent loading-induced drift.
اطلاعات انطباق
RoHS compliant per TI product page. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Marked obsolete by Texas Instruments.
