ADS8517IDWR - 16-Bit 200kSPS Bipolar ADC | Texas Instruments
MPN: ADS8517IDWR ✗ סוף ייצורADS8517IDWR סקירה
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.
חלופות תחליף ישיר עבור ADS8517IDWR — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ADS8517IDWR (אותו גורם צורה וטביעת רגל) — שונים ב Package, Architecture, Internal Reference, Operating Temperature, Resolution.
ADS8517IDW
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ADS8508IBDWRG4
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADS8505IDBRG4
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADS8517IBDW
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ADS8517IDWR דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 16 bit |
| קצב דגימה | 200 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Inputs | 1 |
| Input Range | ±10 V bipolar or 0 V to +5 V unipolar |
| מתח אספקה | +5 V single supply (±5 V for bipolar range) |
| ממשק | 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) |
| מארז | 28-pin SOIC (DW) wide-body |
| טמפרטורת פעולה | -40 °C to +85 °C |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של ADS8517IDWR
| פין 1 | VREF — Reference voltage output / input |
| פין 2 | REFGND — Reference ground |
| פין 3 | IN — Analog input |
| פין 4 | AGND — Analog ground |
| פין 5 | AGND — Analog ground |
| פין 6 | VCC — +5 V analog supply |
| פין 7 | VCC — +5 V analog supply |
| פין 8 | VSS — -5 V analog supply (for bipolar input) |
| פין 9 | VSS — -5 V analog supply (for bipolar input) |
| פין 10 | NC — Not connected (per datasheet) |
| פין 11 | DGND — Digital ground |
| פין 12 | DVDD — +5 V digital supply |
| פין 13 | CS — Chip select input |
| פין 14 | CONVST — Conversion start input |
| פין 15 | RD — Read input |
| פין 16 | BUSY — Busy / data ready output |
| פין 17 | BYTE — Byte mode select (parallel interface) |
| פין 18 | DGND — Digital ground |
| פין 19 | DB15 — Data bit 15 (MSB) |
| פין 20 | DB14 — Data bit 14 |
| פין 21 | DB13 — Data bit 13 |
| פין 22 | DB12 — Data bit 12 |
| פין 23 | DB11 — Data bit 11 |
| פין 24 | DB10 — Data bit 10 |
| פין 25 | DB9 — Data bit 9 |
| פין 26 | DB8 — Data bit 8 |
| פין 27 | DB7 — Data bit 7 |
| פין 28 | DB6 — Data bit 6 (LSB in byte mode) |
יישומים טיפוסיים
ADS8517IDWR מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ADS8517IDWR — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- True ±10 V bipolar input range (לעומתADS8508IBDWRG4)
- Higher throughput than 12-bit predecessors (לעומתADS8508IBDWRG4)
- Wide-body SOIC for thermal stability (לעומתADS8505IDBRG4)
הערות תכנון
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.
מידע על תאימות
RoHS compliant per TI product page. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Marked obsolete by Texas Instruments.
