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Texas Instruments ADS8383IBPFBT
- Part No.:
- ADS8383IBPFBT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TQFP
- Datasheet:
-
ADS8383IBPFBT.pdf
- Description:
- IC ADC 18BIT SAR 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,476
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Product details
Overview
ADS8383IBPFBT from Texas Instruments is an 18-bit, 500-kHz successive approximation register (SAR) analog-to-digital converter with zero latency, unipolar input range, and onboard reference buffer. It delivers 112 dB SFDR at 1 kHz, 88 dB SNR, and ±2.5 LSB differential linearity over −40°C to 85°C - enabling high-accuracy data acquisition in medical instruments and optical networking systems.
For engineers reviewing the ADS8383IBPFBT datasheet, ADS8383IBPFBT pinout, ADS8383IBPFBT application, or ADS8383IBPFBT equivalent, this page provides verified technical context on its SAR architecture, 48-pin TQFP package, 18-/16-/8-bit parallel interface timing, and industrial-temperature performance specifications critical for transducer interface and magnetometer signal chain design.
Technical Context
The ADS8383IBPFBT implements a capacitor-based SAR architecture with inherent sample-and-hold, generating internal conversion clocks to sustain 500-kHz throughput with 1.52 µs conversion time and 400 ns acquisition time. Its differential input stage accepts +IN/−IN signals with −IN limited to −0.2 V to +0.2 V and +IN spanning −0.2 V to VREF + 0.2 V, supporting unipolar full-scale ranges up to 4.096 V.
Digital interfacing uses CMOS-level signals with three configurable bus modes: 18-bit (single-cycle), 16-bit (dual-cycle), or 8-bit (triple-cycle), controlled by BUS18/16 and BYTE inputs. The device requires separate analog (+VA = 5 V) and digital (+VBD = 3 V or 5 V) supplies, with BDGND and AGND isolation maintained via dedicated ground pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - guarantees monotonic output with no missing codes across full industrial temperature range. |
| Sample Rate | 500 kHz - enables real-time capture of signals up to 3 MHz small-signal bandwidth with 15 ps aperture jitter. |
| Integral Linearity | ±7 LSB max - ensures end-point INL error remains within 0.027% of full scale for precision DC measurement. |
| SNR / SINAD | 88 dB / 87 dB at 1 kHz - supports >14.2 ENOB for high-fidelity signal reconstruction in low-noise applications. |
| Power Dissipation | 110 mW at 500 kHz - achieved with 22–26 mA analog supply current and 1 mA digital supply current. |
| Reference Input | 4.096 V external reference - sets full-scale input span; REFIN input impedance is 500 kΩ with 1 mA typical current draw. |
| Operating Temperature | −40°C to +85°C - fully characterized for industrial environments with guaranteed 18-bit performance. |
Pinout & Package
ADS8383IBPFBT is housed in a 48-pin TQFP package (PFB designation), with exposed thermal pad for enhanced heat dissipation. Pin layout separates analog (AGND ×8, +VA ×6, +IN/−IN, REFIN/REFM) and digital (BDGND, +VBD ×2, BUSY, CONVST, CS, RD, BUS18/16, BYTE, DB[17:0]) domains to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN / −IN | Differential analog input | +IN accepts −0.2 V to VREF + 0.2 V; −IN is clamped to −0.2 V to +0.2 V for common-mode rejection. |
| REFIN / REFM | External reference interface | REFIN accepts 2.5–4.2 V reference voltage; REFM is reference ground return, isolated from AGND. |
| CONVST | Conversion start trigger | Falling edge initiates hold mode and starts conversion; 10 ps jitter ensures precise sampling alignment. |
| BUSY | Status output | Active-high open-drain signal indicates conversion in progress; used for interrupt-driven read synchronization. |
| CS / RD / BUS18/16 / BYTE | Parallel bus control | CS enables acquisition; RD latches data; BUS18/16 selects 18-/16-bit mode; BYTE configures 8-bit folding. |
| DB[17:0] | Parallel data output | Three-state CMOS outputs deliver straight binary code; bus width and byte ordering determined by BUS18/16 and BYTE. |
| +VA / +VBD / AGND / BDGND | Power and ground | +VA (5 V) powers analog core; +VBD (3/5 V) powers digital interface; dual ground domains prevent digital noise injection. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency operation | Eliminates pipeline delay - output data corresponds exactly to the sampled instant, critical for closed-loop control. |
| Onboard reference buffer | Drives external 4.096-V reference without external op-amp, reducing BOM count and layout sensitivity. |
| Flexible parallel interface | Configurable 18-/16-/8-bit bus transfer accommodates legacy 8-bit microcontrollers and modern wide-data processors. |
| Low power at high speed | 110 mW at 500 kHz enables portable or thermally constrained designs without sacrificing resolution or bandwidth. |
| Industrial temperature grade | Guaranteed 18-bit performance from −40°C to +85°C - validated across all specs including INL, DNL, and THD. |
Applications
| Medical Instrumentation | Optical Networking |
|---|---|
|
Use Scenario: High-resolution ECG/EEG front-end digitizing low-amplitude bio-signals with minimal distortion. IC Role / Device Role / Timing Role: Primary ADC capturing differential electrode inputs with 18-bit resolution and 500-kHz sampling for real-time waveform analysis. Use Value: 88 dB SNR and 112 dB SFDR preserve signal integrity across cardiac frequency bands (0.05–150 Hz) and reject switching noise from adjacent digital circuitry. |
Use Scenario: Monitoring laser diode bias current and photodiode feedback in DWDM transceivers. IC Role / Device Role / Timing Role: Precision current/voltage monitor ADC feeding closed-loop control algorithms in SFP+ modules. Use Value: ±2.5 LSB DNL and −108 dB THD at 10 kHz ensure accurate calibration of optical power levels under varying thermal conditions. |
| Transducer Interface | Magnetometer Systems |
|
Use Scenario: Digitizing outputs from strain-gauge bridges and piezoelectric sensors in industrial test equipment. IC Role / Device Role / Timing Role: High-linearity ADC converting mV-level bridge outputs with programmable gain and offset compensation. Use Value: ±7 LSB INL and 0.06% FS gain error enable sub-0.01% measurement accuracy without factory recalibration. |
Use Scenario: Reading fluxgate or AMR magnetometer outputs requiring ultra-low noise and drift-stable digitization. IC Role / Device Role / Timing Role: Low-jitter (15 ps) SAR ADC capturing magnetic field variations with minimal aperture uncertainty. Use Value: 150 ns step response and 150 ns overvoltage recovery allow rapid settling after field transients, preserving dynamic fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, high-resolution ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8382IPFBT | 16-bit resolution, ±10 LSB INL, same 500-kHz rate and 48-pin TQFP package | Suitable for cost-sensitive systems where 16-bit precision suffices and 2-bit resolution reduction is acceptable | Select when system ENOB ≤13.5 and budget constraints outweigh need for 18-bit fidelity |
| ADS8860IPWR | 16-bit, 1-MSPS SAR ADC in 16-pin WQFN; no onboard reference buffer; lower power (2.5 mW) | Targeted at space-constrained, battery-powered sensor nodes rather than high-accuracy instrumentation | Choose for portable applications needing higher sample rate and smaller footprint, accepting reduced linearity and external reference dependency |
Compared with ADS8382IPFBT and ADS8860IPWR, the ADS8383IBPFBT uniquely delivers 18-bit resolution with zero latency and integrated reference buffering - making it irreplaceable in applications demanding both metrological accuracy and deterministic timing, such as medical diagnostics and optical control loops.
Availability
ADS8383IBPFBT is available at Aetrix Electronics and suitable for medical instrumentation, optical networking, transducer interface, and magnetometer systems requiring stable component supply, long-term industrial-grade availability, and traceable sourcing.
Supply support for ADS8383IBPFBT 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 signal chain solutions.
The ADS8383IBPFBT belongs to TI's high-performance SAR ADC product line, engineered for applications demanding 18-bit accuracy, 500-kHz throughput, and robust operation across industrial temperature ranges - particularly in instrumentation and communications infrastructure.
FAQ
What is the maximum sample rate supported by the ADS8383IBPFBT?
The ADS8383IBPFBT supports a maximum sample rate of 500 kHz, sustained by a fixed 1.52 µs conversion time and 400 ns acquisition window. This rate is guaranteed across the full −40°C to +85°C operating range with 18-bit resolution and no missing codes. Timing margins remain valid when using 3 V or 5 V digital supply (+VBD) and 5 V analog supply (+VA).
Does the ADS8383IBPFBT require an external reference voltage?
Yes, the ADS8383IBPFBT requires an external reference voltage applied to the REFIN pin, typically 4.096 V for full-scale 0–4.096 V unipolar operation. The device includes an onboard reference buffer but does not contain an internal reference. REFIN must be stable, low-noise, and capable of supplying up to 1 mA; REFM serves as the dedicated reference ground return.
How does the BUS18/16 pin configure the ADS8383IBPFBT data bus?
The BUS18/16 pin on the ADS8383IBPFBT selects between 18-bit and 16-bit parallel data transfer modes. When BUS18/16 = 0, all 18 bits (D17–D0) appear simultaneously on DB[17:0]. When BUS18/16 = 1, only the 16 most significant bits (D17–D2) are output - with D1/D0 delivered on DB[9:2] (BYTE = 0) or DB[17:10] (BYTE = 1) during second read cycle.
What is the purpose of the BIAS pin on the ADS8383IBPFBT?
The BIAS pin on the ADS8383IBPFBT sinks 100–150 µA to generate internal bias currents for analog circuitry. It requires an external 2.048 V bandgap reference (e.g., REF3020) capable of sinking this current while maintaining voltage stability. A 1 µF decoupling capacitor between BIAS and AGND is recommended for optimal noise performance and linearity.
Can the ADS8383IBPFBT operate with separate analog and digital ground planes?
Yes, the ADS8383IBPFBT explicitly supports split-ground design: AGND (pins 5, 8, 11, 12, 14, 15, 44, 45) serves analog circuitry, while BDGND (pin 25) is dedicated to the digital bus interface. Maintaining separate AGND and BDGND traces - joined at a single point near the device - is required to achieve specified SNR, THD, and INL performance across temperature.
ADS8383IBPFBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential, 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
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.95V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8383IBPFBT FAQ
1.How can I place an order for ADS8383IBPFBT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8383IBPFBT 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 ADS8383IBPFBT reliable?
The price and inventory of ADS8383IBPFBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8383IBPFBT is usually 5 days.
3.What payment methods are accepted for ADS8383IBPFBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8383IBPFBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8383IBPFBT?
ADS8383IBPFBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8383IBPFBT 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 ADS8383IBPFBT?
For technical support, including ADS8383IBPFBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8383IBPFBT requirements.
6.How does Aetrix verify that ADS8383IBPFBT is sourced from the original manufacturer or authorized distributors?
All ADS8383IBPFBT 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 ADS8383IBPFBT meets industry standards.
7.What is the process for return or replacement of ADS8383IBPFBT?
All ADS8383IBPFBT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8383IBPFBT, 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 ADS8383IBPFBT part is unused and in its original packaging.
Return procedure for ADS8383IBPFBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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