ADS8519IDBR - 16-Bit 250kSPS SAR ADC 28-SSOP | Texas Instruments
Артикул: ADS8519IDBR ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $14.28 | $14,28 |
| 10 | $12.85 | $128,50 |
| 100 | $11.42 | $1.142,00 |
| 500 | $10.71 | $5.355,00 |
| 1.000 | $9.99 | $9.990,00 |
ADS8519IDBR Обзор
An analog-to-digital converter (ADC) converts continuous analog signals into discrete digital values for digital processing. The SAR ADC family uses a binary search algorithm with a capacitor-based DAC, offering an excellent balance of resolution, speed, and power for data acquisition systems, sitting between slower delta-sigma converters and faster pipeline ADCs in the signal conversion hierarchy.
Key features include 93dB SNR with a 20kHz input, plus/minus 1.5LSB maximum integral nonlinearity (INL), plus/minus 1LSB maximum differential nonlinearity (DNL) with 16 bits no missing codes, and a SPI-compatible serial output with daisy-chain (TAG) capability and 3-state bus. Typical power dissipation is only 110mW at 250kSPS, making it well suited to power-sensitive designs.
Technically, the capacitor-based SAR core with sample-and-hold accurately captures fast-changing signals, while the internal clock and reference eliminate external precision components. The wide 1.65V to 5.25V I/O supply range allows direct interfacing with 1.8V or 3.3V microcontrollers and FPGAs without level shifters. The pinout is similar to the 16-bit ADS7809 and the 12-bit ADS7808 and ADS8508, easing family upgrades.
Typical applications include industrial process control, multi-channel data acquisition systems, medical instrumentation, and test and measurement equipment, where the high SNR and low INL support precision measurements and the daisy-chain serial interface simplifies multi-ADC configurations.
Design tip: decouple the analog supply with 0.1uF and 10uF capacitors placed close to the pins, bypass the reference input with 10uF, and use separate analog and digital ground planes to minimize noise coupling into the 16-bit conversion result.
Аналоги без доработки для ADS8519IDBR — 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 ADS8519IDBR (тот же форм-фактор и посадочное место) — отличается по DNL, INL, Input Ranges, Interface, SNR.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ADS8519IDBRG4
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ADS8519IDBR-Q1
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$10.05 / шт.
Открыть даташит →ADS8519IDBR Максимальные параметры и электрические характеристики
| Разрешение | 16 bit |
| Частота дискретизации | 250 kSPS |
| Architecture | SAR (successive approximation register) |
| Number of Inputs | 1 |
| Input Ranges | 0V to 8.192V, plus/minus 5V, plus/minus 10V |
| SNR | 93 dB at 20kHz input |
| INL | plus/minus 1.5 LSB max |
| DNL | plus/minus 1 LSB max, 16 bits no missing codes |
| Internal Reference | 4.096 V |
| Analog Supply | 5 V |
| I/O Supply | 1.65 V to 5.25 V |
| Power Dissipation | 110 mW typ at 250kSPS |
| Интерфейс | SPI-compatible serial with daisy-chain (TAG) and 3-state bus |
| Корпус | 28-SSOP (DB) |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов ADS8519IDBR
| Контакт 1 | BP — Bipolar offset input - selects bipolar input ranges |
| Контакт 2 | AGND — Analog ground |
| Контакт 3 | CAP — Reference buffer capacitor pin |
| Контакт 4 | REF — Reference input/output (4.096V internal); bypass with 10uF |
| Контакт 5 | VIN — Analog input |
| Контакт 6 | AGND — Analog ground |
| Контакт 11 | PWRD — Power down control |
| Контакт 13 | TAG — Daisy-chain TAG input |
| Контакт 14 | DGND — Digital ground |
| Контакт 16 | DATA CLK — Serial data clock |
| Контакт 17 | EXT/INT — Clock source select (external/internal) |
| Контакт 18 | DATACLK — Serial data clock I/O |
| Контакт 19 | BUSY — Conversion in progress indicator |
| Контакт 23 | R/C — Read/Convert control |
| Контакт 24 | CS — Chip select |
| Контакт 27 | +VS — 5V analog supply |
| Контакт 28 | DVDD — I/O supply (1.65V to 5.25V) |
Типичное применение
ADS8519IDBR подходит для 6 применениеs: Industrial Process Control, Multi-Channel Data Acquisition Systems, Medical Instrumentation, Test and Measurement Equipment, Automotive Data Acquisition, Digital Signal Processing Front Ends.
Industrial Process Control
In industrial process control, sensor outputs such as pressure, flow, and temperature transmitters deliver standard 0-10V or plus/minus 5V signals that map directly to the ADS8519IDBR's three input ranges (8.192V, plus/minus 5V, plus/minus 10V) without external scaling. The 93dB SNR and plus/minus 1.5LSB INL resolve small process variations, while 250kSPS sampling captures fast transients for control loops. The SPI-compatible serial output with daisy-chain TAG mode lets one controller poll multiple ADCs across a plant floor data acquisition board, and the internal 4.096V reference removes external precision components from calibration-critical loops.
Рекомендуется
Multi-Channel Data Acquisition Systems
The ADS8519IDBR's daisy-chain (TAG) serial output and 3-state bus are specifically designed for multi-ADC data acquisition (DAQ) cards. Several devices can share one SPI data line and one conversion clock, so a single FPGA or DSP reads many channels with minimal pin count. At 250kSPS per channel and 110mW typical dissipation, a 16-channel board draws under 2W of conversion power, easing thermal design in dense enclosures. The wide 1.65V to 5.25V I/O range connects directly to 3.3V FPGAs without level translators, and the pinout similarity to the ADS7809/ADS8508 allows 12-bit or lower-speed channel variants on the same layout.
Рекомендуется
Medical Instrumentation
Medical diagnostic equipment requires ADCs that combine high resolution with low noise and proven consistency. The ADS8519IDBR delivers 93dB SNR and 16-bit no-missing-codes performance, resolving physiologically small signals after analog front-end amplification, while the plus/minus 1LSB DNL guarantees monotonic, artifact-free digitization. Its 110mW power dissipation supports battery-operated portable monitors, and the internal clock and reference eliminate external precision components that could drift over service life. The serial output isolates cleanly with standard digital isolators for patient-connected (isolated) front ends.
Рекомендуется
Test and Measurement Equipment
Bench instruments, data loggers, and automated test equipment benefit from the ADS8519IDBR's combination of speed and accuracy. The 250kSPS sampling rate with integrated sample-and-hold captures fast signal edges, while plus/minus 1.5LSB INL preserves measurement linearity across the full plus/minus 10V input range typical of instrumentation. The internal 4.096V reference maintains accuracy without board space for a separate reference IC, and the 3-state parallel-style serial bus allows the converter to share a processor bus with other peripherals. Price around $14 per unit keeps instrument BOM cost controlled.
Рекомендуется
Automotive Data Acquisition
For automotive test and control modules, the pin-compatible ADS8519IDBR-Q1 variant brings AEC-Q100 qualification to the same 16-bit 250kSPS SAR architecture. Battery-rail-derived plus/minus 10V sensor signals (position, pressure, current-sense amplifier outputs) map directly to the ADS8519 input ranges. The 5V analog / wide-range I/O supply scheme tolerates automotive supply variations, and the 110mW dissipation suits modules sealed without heatsinking. The daisy-chain serial interface reduces wiring and EMI paths relative to parallel buses in harness-connected acquisition nodes.
Рекомендуется
Digital Signal Processing Front Ends
DSP-based motor control and power monitoring systems pair the ADS8519IDBR with TI C2000 DSPs through its SPI-compatible serial interface. The 250kSPS rate supports control-loop sampling of voltage and current feedback, and the simple DSP-compatible serial timing requires no glue logic. The 1.65V to 5.25V I/O supply matches both 3.3V and 5V DSP I/O rails. Internal reference and clock free the DSP board of analog timing components, and the TAG daisy-chain allows cascading converters for multi-axis or three-phase systems on a single serial port.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ADS8519IDBR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ADS8519IDBRG4 | ADS8519IDBR-Q1 | ADS7809IBDW | ADS8508IBDW |
|---|---|---|---|---|---|
| Package | 28-SSOP (DB) | 28-SSOP (DB) - same | 28-SSOP (DB) - same | 28-SOIC (DW) - different body | 28-SOIC (DW) - different body |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 100 kSPS | 250 kSPS |
| Input Ranges | 8.192V, plus/minus 5V, plus/minus 10V | Same | Same | Similar family ranges | Similar family ranges |
| Qualification | Standard (industrial) | Standard (green package) | AEC-Q100 automotive | Standard | Standard |
Ключевые отличия
- Fully integrated reference, clock, and sample-and-hold (против ADS7809IBDW)
- Daisy-chain TAG serial output (против ADS8508IBDW)
- Wide I/O supply range (против ADS8519IDBRG4)
Заметки по проектированию
Decouple the 5V analog supply with 0.1uF and 10uF ceramic capacitors placed within 2mm of the +VS pin, and bypass the REF pin with a 10uF capacitor. Use separate analog and digital ground planes joined at a single star point beneath the ADC to prevent digital return currents from corrupting the 16-bit result. Keep the VIN trace short and guarded by ground to reduce pickup into the high-impedance input.
Drive the VIN input from a low-impedance source such as the OPA2192 or OPA828 so the internal sample-and-hold capacitor charges fully within the acquisition window; otherwise sampling glitches degrade SNR below the 93dB specification. Route the DATACLK and R/C lines away from VIN and REF traces; series termination (22-33 ohm) on clock lines reduces ringing at 250kSPS serial rates.
Do not leave the bipolar (BP) pin floating if using unipolar ranges - tie it per datasheet to select the correct range. When using the external clock mode, respect the datasheet DATACLK timing limits; running conversions with marginal clock setup/hold causes missing codes. For power-sensitive systems, use the PWRD pin between conversions rather than gating the supply, which stresses the internal reference at restart.
Информация о соответствии
RoHS compliant per distributor listings. AEC-Q100 qualification is available in the ADS8519IDBR-Q1 variant. REACH and halogen-free status not stated in provided data.
