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Texas Instruments ADS8519IDB
- Part No.:
- ADS8519IDB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8519IDB.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,918
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Product details
Overview
ADS8519IDB from Texas Instruments is a 16-bit, 250kSPS successive approximation register (SAR) analog-to-digital converter with internal 4.096V reference, SPI-compatible serial output, and ±10V/±5V/0–8.192V selectable input ranges. It operates from a single 5V analog supply and 1.65–5.25V I/O supply, delivering 93dB SNR at 20kHz for precision industrial data acquisition.
For engineers reviewing the ADS8519IDB datasheet, ADS8519IDB pinout, ADS8519IDB application, or ADS8519IDB equivalent, key selection criteria include its 28-pin SSOP package, internal reference drift of ±7 ppm/°C (±10V range), daisy-chain TAG capability, and guaranteed 16-bit no-missing-codes performance over –40°C to +85°C.
Technical Context
The ADS8519IDB integrates a capacitor-based SAR architecture with on-chip sample-and-hold, reference buffer, and serial interface logic. Its dual-clock mode (internal or external DATACLK) enables flexible timing synchronization with DSPs or FPGAs, while the BUSY signal provides unambiguous conversion status indication.
It supports three input configurations via R1IN/R2IN/R3IN pins and uses internal precision resistors-no external trimming required. The EXT/INT pin selects clock source, SB/BTC configures data format (straight binary or two's complement), and PWRD enables low-power standby with 20mW dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits, guaranteed no missing codes across full temperature range |
| Throughput Rate | 250 kSPS maximum, with 4 µs total cycle time (acquisition + conversion) |
| SNR | 93 dB at 20 kHz input, enabling high-fidelity signal reconstruction in sensor interfaces |
| INL | ±3 LSB max (ADS8519I grade), supporting <0.05% full-scale linearity error in ±10V range |
| Reference | Internal 4.096 V ±20 mV (±0.5% FSR), drift ±7 ppm/°C - stable enough for uncalibrated industrial systems |
| Power Dissipation | 110 mW typical at 250 kSPS, 20 mW in PWRD-active standby mode |
| Supply Range | VANA = 4.75–5.25 V; VDIG = 1.65–5.25 V - supports mixed-voltage digital interfacing |
Pinout & Package
ADS8519IDB is housed in a 28-pin SSOP (DB) package with 0.65 mm pitch, optimized for compact industrial PCB layouts and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R1IN, R2IN, R3IN | Analog input terminals | Configure ±10V, ±5V, or 0–8.192V input ranges via internal resistor network; ±25V absolute max rating |
| REF | Reference I/O | Outputs internal 4.096V reference or accepts external 3.9–4.2V reference; requires 2.2 µF tantalum bypass to AGND2 |
| CAP | Reference buffer capacitor terminal | Connects to 2.2 µF tantalum capacitor for internal reference stability and noise suppression |
| CS, R/C | Control inputs | OR-ed chip select and read/convert trigger; falling edge initiates conversion and controls data read timing |
| BUSY | Status output | Active-low open-drain signal indicating conversion in progress; falls at start, rises after data latched |
| DATA, DATACLK | Serial interface I/O | 16-bit MSB-first SPI-compatible output; DATACLK is bidirectional (output in internal clock mode, input in external mode) |
| TAG | Daisy-chain input | Enables cascading multiple ADS8519 devices on shared DATA bus; level sampled at transmission start |
| PWRD | Power-down control | High-level input disables conversion and reduces power to 20 mW; retains last conversion result in shift register |
| AGND1, AGND2, DGND | Ground terminals | Separate analog/digital grounds minimize noise coupling; AGND2 referenced to REF and CAP |
Key Features
| Feature | Design Value |
|---|---|
| Input range flexibility | Hardware-selectable ±10V, ±5V, or 0–8.192V using internal precision resistors - eliminates external scaling components |
| SPI-compatible serial interface | 16-bit MSB-first output with programmable data format (straight binary/two's complement) and daisy-chain TAG support |
| Internal reference stability | 4.096 V ±0.5% FSR with ±7 ppm/°C drift over –40°C to +85°C - enables calibration-free operation in factory automation |
| Low-power standby | PWRD pin reduces active power from 110 mW to 20 mW without losing last conversion result - ideal for battery-backed monitoring |
| Robust timing control | BUSY signal and dual-clock modes (internal/external DATACLK) ensure deterministic data capture in real-time DSP systems |
Applications
| Industrial Process Control | Data Acquisition Systems |
|---|---|
|
Use Scenario: Monitoring multi-channel analog sensor outputs (pressure, temperature, flow) in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC converting conditioned ±10V field signals into 16-bit digital values synchronized to controller scan cycles via BUSY and R/C. Use Value: ±3 LSB INL and 93 dB SNR ensure sub-0.1% measurement accuracy across 4–20 mA loop equivalents without per-channel calibration. |
Use Scenario: High-channel-count DAQ modules for lab-grade oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Sampling front-end ADC with external DATACLK synchronization to FPGA timing engine for coherent multi-channel capture. Use Value: Discontinuous external clock mode with SYNC pulse enables glitch-free data reads during conversion, preserving full 250 kSPS throughput per channel. |
| Digital Signal Processing | Medical Equipment |
|
Use Scenario: Real-time vibration analysis in predictive maintenance gateways interfacing accelerometers and strain gauges. IC Role / Device Role / Timing Role: Precision ADC feeding FFT engine in ARM Cortex-M7-based edge processor; uses internal DATACLK for minimal latency. Use Value: 16-bit no-missing-codes resolution and 500 kHz full-power bandwidth capture harmonic content up to 10th order in rotating machinery. |
Use Scenario: Patient vital sign monitors requiring simultaneous ECG, respiration, and SpO₂ analog signal digitization. IC Role / Device Role / Timing Role: Multi-input ADC accepting isolated ±5V biopotential signals; leverages R1IN/R2IN/R3IN configuration for differential lead setups. Use Value: Internal 4.096V reference and ±1 LSB DNL guarantee clinical-grade linearity (<0.0015% FSR) without external voltage references or trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8517IDB | 16-bit, 100 kSPS, same SSOP-28 package but lower throughput and reduced SNR (90 dB) | Lower-cost alternative where 100 kSPS suffices and system clock budget is constrained | Select ADS8517IDB when sampling rate requirements are ≤100 kSPS and board space must match ADS8519IDB footprint |
| ADS8509IPW | 18-bit, 250 kSPS, TSSOP-28 package, higher resolution but larger 18-bit word length and different pinout | Applications demanding <0.001% linearity and extended dynamic range, e.g., precision metrology | Choose ADS8509IPW only if 18-bit resolution is mandatory and PCB layout can accommodate revised pin assignments and timing margins |
Compared with ADS8519IDB, ADS8517IDB trades speed and SNR for cost savings in static measurement systems, while ADS8509IPW increases resolution at the expense of software compatibility and layout redesign - neither is pin-compatible, but both share TI's SAR architecture design philosophy.
Availability
ADS8519IDB is available at Aetrix Electronics and suitable for industrial process control, data acquisition systems, and medical equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for ADS8519IDB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade ICs.
The ADS8519 series was designed specifically for high-accuracy, medium-speed industrial data acquisition - emphasizing robustness, reference stability, and seamless DSP/FPGA integration without external support components.
FAQ
What is the guaranteed resolution and linearity performance of the ADS8519IDB over temperature?
The ADS8519IDB guarantees 16-bit resolution with no missing codes across –40°C to +85°C. Its integral nonlinearity (INL) is specified at ±3 LSB maximum, corresponding to <0.05% full-scale error in the ±10V range. This performance is validated under all operating conditions per the SLAS462D datasheet, ensuring consistent accuracy in uncalibrated industrial environments where the ADS8519IDB is deployed.
Does the ADS8519IDB require external precision resistors to configure input ranges?
No, the ADS8519IDB does not require external precision resistors. It integrates internal laser-trimmed resistors that enable hardware-selectable input ranges of ±10V, ±5V, and 0–8.192V via R1IN/R2IN/R3IN pin connections. This eliminates external scaling networks and associated tolerance stack-up, simplifying design and improving long-term stability - a core feature confirmed in the device description and electrical characteristics tables of the ADS8519IDB datasheet.
How does the ADS8519IDB handle power-down mode, and what happens to the last conversion result?
When the PWRD pin is driven high, the ADS8519IDB enters low-power standby mode, reducing dissipation from 110 mW to 20 mW. Crucially, the last valid conversion result remains latched in the internal output shift register and remains accessible via the serial interface. This behavior allows systems to conserve energy between measurements while retaining immediate access to recent data - a verified feature documented in the "POWER DISSIPATION" and "Pin Assignments" sections for ADS8519IDB.
Can the ADS8519IDB interface directly with a 3.3V microcontroller SPI port?
Yes, the ADS8519IDB supports I/O supply voltages from 1.65V to 5.25V on VDIG, making it fully compatible with 3.3V logic levels. Its digital inputs accept VIH ≥ 0.5 × VDIG and VIL ≤ 0.6V, while outputs drive VOH ≥ VDIG – 0.45V and VOL ≤ 0.45V - all satisfied at VDIG = 3.3V. This interoperability is explicitly specified in the "DIGITAL INPUTS" and "DIGITAL OUTPUTS" tables of the ADS8519IDB datasheet.
What is the function of the TAG pin on the ADS8519IDB, and how is it used in multi-ADC systems?
The TAG pin on the ADS8519IDB serves as a daisy-chain input for cascading multiple converters on a shared DATA bus. In external clock mode, the level present on TAG at the start of transmission is output on the DATA pin after the 16-bit conversion result, enabling frame synchronization across devices. This capability is confirmed in the "Pin Assignments" and "BASIC OPERATION" sections of the ADS8519IDB datasheet and is essential for synchronized multi-channel acquisition without additional control lines.
ADS8519IDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8519IDB FAQ
1.How can I place an order for ADS8519IDB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8519IDB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS8519IDB reliable?
The price and inventory of ADS8519IDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8519IDB is usually 5 days.
3.What payment methods are accepted for ADS8519IDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8519IDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8519IDB?
ADS8519IDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8519IDB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS8519IDB?
For technical support, including ADS8519IDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8519IDB requirements.
6.How does Aetrix verify that ADS8519IDB is sourced from the original manufacturer or authorized distributors?
All ADS8519IDB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS8519IDB meets industry standards.
7.What is the process for return or replacement of ADS8519IDB?
All ADS8519IDB units undergo pre-shipment inspection (PSI). If there is an issue with ADS8519IDB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS8519IDB part is unused and in its original packaging.
Return procedure for ADS8519IDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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