ADS8517IDWR - 16-Bit 200kSPS Bipolar ADC | Texas Instruments
Артикул: ADS8517IDWR ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $8.95 | $8,95 |
| 10 | $7.62 | $76,20 |
| 100 | $6.18 | $618,00 |
| 500 | $5.42 | $2.710,00 |
| 1.000 | $4.86 | $4.860,00 |
ADS8517IDWR Обзор
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.
Аналоги без доработки для ADS8517IDWR — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с ADS8517IDWR (тот же форм-фактор и посадочное место) — отличается по Package, Architecture, Internal Reference, Operating Temperature, Resolution.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ADS8517IDW
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ADS8508IBDWRG4
✅ Прямая замена✓ В наличии
$7.1 / шт.
Открыть даташит →ADS8505IDBRG4
✅ Прямая замена✓ В наличии
$30.86 / шт.
Открыть даташит →ADS8517IBDW
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ADS8517IDWR Максимальные параметры и электрические характеристики
| Разрешение | 16 bit |
| Частота дискретизации | 200 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Inputs | 1 |
| Input Range | ±10 V bipolar or 0 V to +5 V unipolar |
| Напряжение питания | +5 V single supply (±5 V for bipolar range) |
| Интерфейс | 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) |
| Корпус | 28-pin SOIC (DW) wide-body |
| Рабочая температура | -40 °C to +85 °C |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов ADS8517IDWR
| Контакт 1 | VREF — Reference voltage output / input |
| Контакт 2 | REFGND — Reference ground |
| Контакт 3 | IN — Analog input |
| Контакт 4 | AGND — Analog ground |
| Контакт 5 | AGND — Analog ground |
| Контакт 6 | VCC — +5 V analog supply |
| Контакт 7 | VCC — +5 V analog supply |
| Контакт 8 | VSS — -5 V analog supply (for bipolar input) |
| Контакт 9 | VSS — -5 V analog supply (for bipolar input) |
| Контакт 10 | NC — Not connected (per datasheet) |
| Контакт 11 | DGND — Digital ground |
| Контакт 12 | DVDD — +5 V digital supply |
| Контакт 13 | CS — Chip select input |
| Контакт 14 | CONVST — Conversion start input |
| Контакт 15 | RD — Read input |
| Контакт 16 | BUSY — Busy / data ready output |
| Контакт 17 | BYTE — Byte mode select (parallel interface) |
| Контакт 18 | DGND — Digital ground |
| Контакт 19 | DB15 — Data bit 15 (MSB) |
| Контакт 20 | DB14 — Data bit 14 |
| Контакт 21 | DB13 — Data bit 13 |
| Контакт 22 | DB12 — Data bit 12 |
| Контакт 23 | DB11 — Data bit 11 |
| Контакт 24 | DB10 — Data bit 10 |
| Контакт 25 | DB9 — Data bit 9 |
| Контакт 26 | DB8 — Data bit 8 |
| Контакт 27 | DB7 — Data bit 7 |
| Контакт 28 | DB6 — Data bit 6 (LSB in byte mode) |
Типичное применение
ADS8517IDWR подходит для 6 применениеs: 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ADS8517IDWR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- True ±10 V bipolar input range (против ADS8508IBDWRG4)
- Higher throughput than 12-bit predecessors (против ADS8508IBDWRG4)
- Wide-body SOIC for thermal stability (против ADS8505IDBRG4)
Заметки по проектированию
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.
Информация о соответствии
RoHS compliant per TI product page. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Marked obsolete by Texas Instruments.
