My Inquiry
My Account
Texas Instruments ADS8515IDBR
- Part No.:
- ADS8515IDBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8515IDBR.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS8515IDBR from Texas Instruments is a 16-bit, 250-kSPS successive approximation register (SAR) analog-to-digital converter with ±10 V input range, internal 4.096 V reference, and full parallel 16-bit twos-complement output. It operates from a single +5 V analog supply and supports flexible I/O voltage (1.65–5.25 V), delivering 90 dB min SNR at 20 kHz for precision industrial data acquisition.
For engineers reviewing the ADS8515IDBR datasheet, ADS8515IDBR pinout, ADS8515IDBR application, or ADS8515IDBR equivalent, key selection considerations include its SSOP-28 package, 2 ms conversion time, ±2.0 LSB max INL, 100 mW typical power dissipation, and support for both internal and external reference configurations.
Technical Context
The ADS8515IDBR implements a capacitor-based SAR architecture with integrated sample-and-hold, comparator, CDAC, and three-state parallel drivers. Its control logic accepts asynchronous R/C and CS inputs to initiate conversion and enable output, with BUSY signaling completion.
It features dual ground separation (AGND1, AGND2, DGND), on-chip precision resistor network for ±10 V input scaling, and internal reference buffer driving CAP pin - requiring a 2.2 µF tantalum capacitor with ESR < 3 Ω for stable operation across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 305 µV LSB step size over ±10 V full-scale range |
| Throughput Rate | 250 kSPS - fixed-rate sampling with 4 µs minimum convert pulse width and 4 ms throughput cycle |
| INL / DNL | ±2.0 LSB max INL, ±1 LSB max DNL - guarantees monotonicity and no missing codes across temperature |
| SNR / SINAD | 90 dB min SNR, 87 dB min SINAD at 20 kHz - enables high-fidelity signal capture in noisy industrial environments |
| Reference | Internal 4.096 V ±20 mV (±8 ppm/°C drift) or external 3.9–4.2 V - determines full-scale accuracy and LSB scaling |
| Power Dissipation | 100 mW typ at 250 kSPS - low thermal load suitable for dense PCB layouts without forced cooling |
| Analog Input Range | ±10 V with 8.885 kΩ input impedance - compatible with standard industrial sensor outputs and op-amp drivers |
Pinout & Package
ADS8515IDBR is housed in a 28-pin SSOP (DB) package with gull-wing leads, 0.65 mm pitch, and 9.7 mm × 3.9 mm body dimensions. Thermal resistance ΘJA = 67°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | ±10 V differential input referenced to AGND1; protected to ±25 V by internal resistor divider |
| REF | Reference I/O | Output of internal 4.096 V reference or input for external reference; requires 2.2 µF decoupling |
| CAP | Reference buffer output | Drives CDAC switching current; must be bypassed with 2.2 µF tantalum cap (ESR < 3 Ω) |
| AGND1 | Analog signal ground | Primary reference for internal analog circuitry and VIN; lowest-impedance return path required |
| AGND2 | Analog supply ground | Return for VANA supply; separated from AGND1 to minimize supply-induced noise coupling |
| DGND | Digital ground | Return for VDIG and digital I/O; must be tied to analog ground plane near power entry point |
| R/C | Convert/Read control | Falling edge initiates conversion; rising edge enables parallel output; internally ORed with CS |
| CS | Chip select | Active-low enable for data bus; when low with R/C high, outputs valid 16-bit twos-complement code |
| BUSY | Conversion status | Active-low open-drain output; goes low at conversion start, high after data registers updated |
| BYTE | Byte-select control | High = output D15–D8 (MSB byte); Low = output D7–D0 (LSB byte) on pins 6–13 and 15–22 |
| D0–D15 | Parallel data outputs | Three-state, 16-bit twos-complement output; Hi-Z when CS high or R/C low; latched on BUSY rising edge |
| VANA | Analog supply | +4.75 V to +5.25 V; powers >90% of device; decouple with 0.1 µF ceramic + 10 µF tantalum |
| VDIG | Digital supply | +1.65 V to +5.25 V; may tie to VANA; powers interface logic only |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible upgrade path | Direct replacement for ADS7805/ADS7810 (12-bit) and ADS7804/ADS8504 - simplifies legacy system resolution upgrades |
| Flexible reference architecture | Switchable between internal 4.096 V reference (±0.25% FSR error) and external 3.9–4.2 V source - enables optimized SNR or calibration stability |
| Robust input protection | Integrated ±25 V absolute maximum rating with 8.885 kΩ input impedance - eliminates need for external clamping in most industrial interfaces |
| Low-noise analog front-end | Charge-injection reduced to 5–10% vs. typical CMOS SARs - minimizes op-amp instability and allows use of OPA132/OPA627 drivers |
| Industrial-grade thermal performance | Specified over –40°C to +85°C with derated operation to +125°C - supports deployment in uncontrolled factory or field environments |
Applications
| Industrial Process Control | Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring multi-channel pressure, temperature, and flow sensors in PLC-based control cabinets with ±10 V analog outputs. IC Role / Device Role / Timing Role: High-accuracy ADC capturing synchronized samples at 250 kSPS for real-time PID loop execution and alarm triggering. Use Value: ±2.0 LSB INL ensures sub-0.01% full-scale linearity across temperature, enabling precise setpoint tracking without software correction. |
Use Scenario: Modular DAQ chassis acquiring vibration signatures from accelerometers and strain gauges in predictive maintenance systems. IC Role / Device Role / Timing Role: 16-bit SAR converter providing low-latency, deterministic sampling with BUSY-driven data latching for FPGA-based timestamping. Use Value: 90 dB SNR at 20 kHz preserves harmonic content critical for FFT-based fault detection in rotating machinery. |
| Digital Signal Processing | Medical Equipment |
Use Scenario: Front-end digitization in portable ultrasound beamformers where analog channel count and power budget constrain SoC integration. IC Role / Device Role / Timing Role: Parallel-output ADC interfacing directly to DSP memory bus, eliminating serial interface latency and clock domain crossing. Use Value: Full 16-bit parallel interface with 83 ns bus access timing enables zero-wait-state transfers to TI C6000-series processors. |
Use Scenario: Patient monitoring devices measuring ECG, EEG, and bioimpedance signals requiring high DC accuracy and low noise. IC Role / Device Role / Timing Role: Precision ADC with bipolar zero error ≤ ±4 mV and 88 dB SNR supporting clinical-grade waveform fidelity. Use Value: Internal 4.096 V reference with ±2 ppm/°C drift ensures stable LSB size across operating temperature, reducing recalibration frequency. |
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 |
|---|---|---|---|
| ADS8505IPWR | Same 16-bit SAR architecture, 250 kSPS, but uses SPI interface and smaller TSSOP-20 package; lacks parallel bus and BYTE control | Best for space-constrained designs where microcontroller has SPI and does not require simultaneous 16-bit read | Select ADS8505IPWR when board area is limited and firmware can manage serial protocol overhead |
| AD7606BSTZ | 8-channel, 16-bit simultaneous-sampling SAR ADC with internal reference, 200 kSPS per channel, parallel+SPI interface | Suitable for multi-sensor synchronous acquisition; higher channel density but lower per-channel throughput than ADS8515IDBR | Choose AD7606BSTZ when acquiring ≥2 channels with matched phase response, accepting 200 kSPS/channel trade-off |
Compared with ADS8515IDBR, ADS8505IPWR reduces footprint and interface complexity at the cost of parallel data throughput and byte-read flexibility, while AD7606BSTZ trades single-channel speed for multi-channel synchronization - making ADS8515IDBR optimal for high-speed, single-channel industrial DAQ where deterministic parallel timing is critical.
Availability
ADS8515IDBR is available at Aetrix Electronics and suitable for industrial process control, data acquisition systems, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8515IDBR 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, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS8515IDBR belongs to TI's high-precision SAR ADC product line, engineered for demanding industrial and instrumentation applications where resolution, linearity, and robustness outweigh serial interface convenience.
FAQ
What is the maximum sampling rate supported by the ADS8515IDBR?
The ADS8515IDBR is specified for a maximum throughput rate of 250 kSPS across its full industrial temperature range (–40°C to +85°C). This corresponds to a 4 µs minimum convert pulse width and a 4 ms total throughput cycle including acquisition and conversion. Performance remains stable at this rate with 100 mW typical power dissipation and no derating required.
Does the ADS8515IDBR require external components for reference stability?
Yes - the ADS8515IDBR requires a 2.2 µF tantalum capacitor with ESR < 3 Ω connected between CAP (pin 4) and AGND2. This capacitor supplies transient current to the internal CDAC during conversion and stabilizes the reference buffer. Using a smaller value or higher-ESR capacitor risks oscillation, INL degradation, and failed conversions. The REF (pin 3) also needs a 2.2 µF capacitor if using external reference.
Can the ADS8515IDBR operate with a 3.3 V digital supply while maintaining full 16-bit performance?
Yes - the ADS8515IDBR supports VDIG from 1.65 V to 5.25 V, including 3.3 V. Digital output levels scale accordingly (VOH ≥ 0.8×VDIG, VOL ≤ 0.4 V), and all timing parameters (bus access, relinquish, enable/disable) remain valid. Analog performance - including SNR, INL, and reference accuracy - is unaffected since it depends solely on VANA and internal analog circuitry.
How is bipolar zero error calibrated in the ADS8515IDBR?
The ADS8515IDBR specifies bipolar zero error ≤ ±4 mV over temperature, adjustable via external potentiometer in hardware trim mode (Figure 25a) or corrected in software using two-point calibration. The internal offset is factory-trimmed, and residual error is dominated by reference drift and resistor matching. With internal reference, zero error drift is ±2 ppm/°C - equivalent to ±0.2 µV/°C at full scale.
Is the ADS8515IDBR pin-compatible with older TI 12-bit converters like the ADS7805?
Yes - the ADS8515IDBR is explicitly designed as a pin-compatible upgrade for ADS7805 and ADS7810 (12-bit) and ADS7804/ADS8504 (12-bit) in the same SSOP-28 package. Pin functions, power sequencing, and timing behavior are preserved, allowing drop-in replacement to increase resolution without PCB redesign - though layout best practices (ground separation, decoupling) must still be followed.
ADS8515IDBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- 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:
- -
ADS8515IDBR FAQ
1.How can I place an order for ADS8515IDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8515IDBR 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 ADS8515IDBR reliable?
The price and inventory of ADS8515IDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8515IDBR is usually 5 days.
3.What payment methods are accepted for ADS8515IDBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8515IDBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8515IDBR?
ADS8515IDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8515IDBR 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 ADS8515IDBR?
For technical support, including ADS8515IDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8515IDBR requirements.
6.How does Aetrix verify that ADS8515IDBR is sourced from the original manufacturer or authorized distributors?
All ADS8515IDBR 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 ADS8515IDBR meets industry standards.
7.What is the process for return or replacement of ADS8515IDBR?
All ADS8515IDBR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8515IDBR, 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 ADS8515IDBR part is unused and in its original packaging.
Return procedure for ADS8515IDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS8515IDBR Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
