ADS8519IDBR-Q1 - 16-Bit 250kSPS SAR ADC | Texas Instruments
MPN: ADS8519IDBR-Q1 ✓ פעילADS8519IDBR-Q1 סקירה
An ADC (analog-to-digital converter) is a data converter that transforms continuous analog signals into discrete digital values. Within the converter hierarchy, the SAR (successive approximation register) architecture offers an optimal balance of resolution, speed, and low power for medium-rate acquisition systems, sitting between slower delta-sigma converters and faster pipeline ADCs.
Key features include 0V to 8.192V, plus/minus 5V, and plus/minus 10V input ranges; 93dB SNR with a 20kHz input; plus/minus 1.5LSB maximum INL and plus/minus 1LSB maximum DNL with 16 bits no missing codes; an SPI-compatible serial output with daisy-chain (TAG) feature and 3-state bus; and a 5V analog supply with a wide 1.65V to 5.25V I/O supply. Data can be clocked out using the internal clock or synchronized to an external data clock.
The pinout is similar to the 16-bit ADS7809 (low-speed) and the 12-bit ADS7808 and ADS8508, simplifying migration across resolution tiers. The device is fully specified over the industrial -40C to +85C temperature range.
Typical applications include automotive and industrial data acquisition, multi-channel instrumentation with daisy-chained converters, motor-control feedback, and test equipment front ends.
Design tip: decouple the internal reference with a low-ESR capacitor and drive the input through a low-impedance buffer (e.g., THS-series op amp) to preserve the 93dB SNR; ensure the digital host can honor the conversion timing at 250kSPS.
חלופות תחליף ישיר עבור ADS8519IDBR-Q1 — 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 ADS8519IDBR-Q1 (אותו גורם צורה וטביעת רגל) — שונים ב DNL, INL, Input Ranges, Interface, SNR.
ADS8519IDBR
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADS8519IBDBR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ADS7809IDBR
⚡ אותה מארזה📋 חלופה להתייחסות (לא בקטלוג)
ADS8519IDBR-Q1 דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 16 bit |
| קצב דגימה | 250 kSPS |
| Architecture | SAR (successive approximation register) |
| Number of Inputs | 1 |
| Input Ranges | 0V to 8.192V, +-5V, +-10V |
| SNR | 93 dB (20 kHz input) |
| INL | +-1.5 LSB max |
| DNL | +-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 |
| ממשק | SPI-compatible serial with daisy-chain (TAG), 3-state bus |
| טמפרטורת פעולה | -40C to +85C |
| מארז | 28-SSOP (DB) |
| סוג הרכבה | Surface Mount |
| Automotive Qualification | AEC-Q100 (Q1) |
| סטטוס RoHS | Compliant |
תצורת פינים של ADS8519IDBR-Q1
| פין 1 | BP — Bipolar offset input |
| פין 2 | AG1 — Analog ground |
| פין 3 | CAP — Reference buffer capacitor |
| פין 4 | REF — Reference input/output (4.096V internal) |
| פין 5 | R1IN — Range input 1 |
| פין 6 | R2IN — Range input 2 |
| פין 7 | R3IN — Range input 3 |
| פין 8 | IN — Analog input |
| פין 9 | AG2 — Analog ground |
| פין 10 | VANA — 5V analog supply |
| פין 11 | BYTE — Byte selection |
| פין 12 | TAG — Tag input for daisy-chain |
| פין 13 | BUSY — Conversion status output |
| פין 14 | DGND — Digital ground |
| פין 15 | RC — Read/convert input |
| פין 16 | EXT/INT — External/internal clock select |
| פין 17 | DATACLK — Data clock I/O |
| פין 18 | SDATA — Serial data output |
| פין 19 | VDIG — Digital I/O supply (1.65V to 5.25V) |
| פין 20 | CS — Chip select |
| פין 21-28 | D15-D8 / parallel data — [DATA_NEEDED: exact parallel pin mapping] |
יישומים טיפוסיים
ADS8519IDBR-Q1 מתאים עבור 6 יישוםs: Automotive Data Acquisition, Industrial Data Acquisition Systems, Motor Control Feedback, Test and Measurement Front Ends, Multi-Channel Sensor Arrays, Power Quality and Energy Monitoring.
Automotive Data Acquisition
The ADS8519IDBR-Q1's AEC-Q100 qualification makes it suitable for automotive ECU data acquisition where 16-bit resolution captures sensor signals such as pressure, position, and battery current. Its 93dB SNR with a 20kHz input preserves small-signal fidelity, while the integrated 4.096V reference reduces BOM count in space-constrained modules. The SPI-compatible serial output with daisy-chain TAG feature lets several converters share one controller data line, cutting harness complexity. Placed behind a precision op-amp front end, the converter delivers deterministic 4us conversion cycles with no pipeline latency.
מומלץ
Industrial Data Acquisition Systems
In industrial DAQ, the ADS8519 handles plus/minus 10V and 0V to 8.192V input ranges natively, directly interfacing standard industrial signal levels without extra attenuation stages. Its 250kSPS rate supports multi-channel scanning at kilohertz per channel, while +-1.5LSB max INL and 16 bits no missing codes guarantee accurate absolute measurements. The daisy-chain serial bus reduces isolation-channel count in galvanically isolated front ends. Its industrial -40C to +85C rating matches factory-floor environments, and SAR architecture gives predictable timing for synchronized sampling.
מומלץ
Motor Control Feedback
The ADS8519 provides deterministic, single-cycle SAR conversion - no pipeline delay - which is critical for current-loop feedback in motor drives running at switching frequencies in the tens of kilohertz. Its 250kSPS throughput supports per-cycle current sampling, and the plus/minus 5V range suits shunt-amplifier outputs. With a 1.65V to 5.25V I/O supply, it interfaces directly with 3.3V MCUs such as the TMS320F28004x C2000 family. The sample-and-hold aperture ensures simultaneous-in-time measurement for balanced phase-current calculations.
מומלץ
Test and Measurement Front Ends
Bench instruments and automated test equipment benefit from the ADS8519's 93dB SNR, which yields an effective noise floor near 15 bits, adequate for precision DC and low-frequency AC measurement. The integrated reference and sample-and-hold reduce design effort in instrument front ends, while the 3-state serial bus simplifies multi-converter backplanes. Its SAR latency is zero-cycle (data valid immediately), avoiding the group delay of delta-sigma filters, which matters for event capture and waveform recording in test systems.
מומלץ
Multi-Channel Sensor Arrays
The TAG daisy-chain serial output allows multiple ADS8519 converters to share a single SPI data line, reducing controller pin count and isolation channels in sensor arrays. Each device still samples independently and simultaneously, preserving phase alignment across channels - important for vibration and power-quality monitoring. The 250kSPS per-channel rate covers audio-band and mechanical diagnostics. Because the pinout is similar to the ADS7809/ADS7808 family, channel-count upgrades can reuse the same footprint across resolution tiers.
מומלץ
Power Quality and Energy Monitoring
The ADS8519's bipolar plus/minus 10V range directly accepts scaled AC mains and current-transformer signals, while 16-bit resolution resolves low-level harmonics within a large dynamic range. Its 93dB SNR supports harmonic analysis up to the 12th order at 50/60Hz fundamentals with margin. Zero-latency SAR sampling enables true simultaneous voltage-current capture for accurate power factor computation. The internal 4.096V reference keeps channel-to-channel matching consistent across multi-board installations, simplifying factory calibration.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ADS8519IDBR-Q1 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ADS8519IDBR | ADS8519IBDBR | ADS7809IDBR |
|---|---|---|---|---|
| Package | 28-SSOP (DB) | 28-SSOP (DB) - same | 28-SSOP (DB) - same | 28-SSOP (DB) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 100 kSPS |
| Temperature Range | -40C to +85C (Q1) | -40C to +85C | -40C to +85C (IB grade, tighter limits) | -40C to +85C |
| Automotive Qualification | AEC-Q100 (Q1) | No | No | No |
מבדילים עיקריים
- AEC-Q100 automotive qualification (לעומתADS8519IDBR)
- Zero pipeline latency SAR architecture (לעומתADS127L11)
- Native +-10V input range (לעומתADS7809IDBR)
הערות תכנון
Keep the analog ground plane under the ADC separate from the digital plane, joining at one point near DGND. Decouple VANA with 10uF tantalum plus 0.1uF ceramic at the pin, and place the CAP-pin reference buffer capacitor per the datasheet layout figure. Route the SPI clock away from the IN and REF traces to avoid digital coupling that would degrade the 93dB SNR.
Drive the analog input from a low-impedance source such as the OPA827 or THS4531A; the SAR sampling capacitor draws charge impulses at each acquisition, and high source impedance causes settling errors visible as INL degradation near mid-code. If using the +-10V range, scale with a precision resistor network before a unity-gain buffer rather than loading the sensor directly.
Verify the RC (read/convert) timing at 250kSPS: toggling RC faster than the specified conversion window truncates the SAR cycle and produces corrupted data. When daisy-chaining via the TAG feature, ensure the external data clock is fast enough to shift all chained devices' bits within the frame. Also confirm the I/O supply (1.65V to 5.25V) matches your MCU logic levels before tying VDIG.
מידע על תאימות
RoHS compliant per TI product page; Q1 suffix indicates AEC-Q100 automotive qualification.
