ADS8519IDBR-Q1 - 16-Bit 250kSPS SAR ADC | Texas Instruments
MPN: ADS8519IDBR-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $15.9 | $15.90 |
| 10 | $14.31 | $143.10 |
| 100 | $12.72 | $1,272.00 |
| 500 | $11.3 | $5,650.00 |
| 1,000 | $10.05 | $10,050.00 |
Drop-in alternatives for ADS8519IDBR-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADS8519IDBR
β Drop-Inβ In Stock
$10.28 / Unit
View Datasheet βADS8519IBDBR
β Drop-Inπ Reference alternative (not in catalog)
ADS7809IDBR
β‘ Same Packageπ Reference alternative (not in catalog)
ADS8519IDBR-Q1 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Sampling Rate | 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 |
| Interface | SPI-compatible serial with daisy-chain (TAG), 3-state bus |
| Operating Temperature | -40C to +85C |
| Package | 28-SSOP (DB) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 (Q1) |
| RoHS Status | Compliant |
ADS8519IDBR-Q1 Pin Configuration
| Pin 1 | BP β Bipolar offset input |
| Pin 2 | AG1 β Analog ground |
| Pin 3 | CAP β Reference buffer capacitor |
| Pin 4 | REF β Reference input/output (4.096V internal) |
| Pin 5 | R1IN β Range input 1 |
| Pin 6 | R2IN β Range input 2 |
| Pin 7 | R3IN β Range input 3 |
| Pin 8 | IN β Analog input |
| Pin 9 | AG2 β Analog ground |
| Pin 10 | VANA β 5V analog supply |
| Pin 11 | BYTE β Byte selection |
| Pin 12 | TAG β Tag input for daisy-chain |
| Pin 13 | BUSY β Conversion status output |
| Pin 14 | DGND β Digital ground |
| Pin 15 | RC β Read/convert input |
| Pin 16 | EXT/INT β External/internal clock select |
| Pin 17 | DATACLK β Data clock I/O |
| Pin 18 | SDATA β Serial data output |
| Pin 19 | VDIG β Digital I/O supply (1.65V to 5.25V) |
| Pin 20 | CS β Chip select |
| Pin 21-28 | D15-D8 / parallel data β [DATA_NEEDED: exact parallel pin mapping] |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS8519IDBR-Q1 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for ADS8519IDBR-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| SNR | 93 dB | 93 dB | 93 dB | [DATA_NEEDED] |
| 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 |
| Input Ranges | 0-8.192V, +-5V, +-10V | same | same | [DATA_NEEDED] |
Key Differentiators
- AEC-Q100 automotive qualification (vs ADS8519IDBR)
- Zero pipeline latency SAR architecture (vs ADS127L11)
- Native +-10V input range (vs ADS7809IDBR)
Design Notes
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.
Compliance Information
RoHS compliant per TI product page; Q1 suffix indicates AEC-Q100 automotive qualification.
