ADS8383IPFBTG4 - 18-Bit 500kHz SAR ADC, 48-TQFP | Texas Instruments
MPN: ADS8383IPFBTG4 ✓ نشطADS8383IPFBTG4 نظرة عامة
A SAR ADC is a precision data converter architecture that uses a binary-search algorithm across an internal capacitor DAC to resolve each conversion in a fixed number of clock cycles. Compared with delta-sigma and pipeline ADCs, SAR converters offer deterministic latency and excellent linearity at moderate sample rates, making them the preferred choice for multiplexed data-acquisition systems, industrial process control, and instrumentation front-ends where repeatable per-sample timing matters more than the highest possible throughput.
Key specifications include 18-bit no-missing-codes resolution, 500 kSPS maximum throughput, an 18-/16-/8-bit selectable parallel interface, and a true bipolar-capable pseudo-bipolar input stage when driven with a VREF-centered input. The device features a high-impedance CMOS input structure with 4.5 ns aperture delay and excellent common-mode rejection, allowing direct connection to high-impedance sensors and instrumentation amplifiers. The internal sample-and-hold accepts fast-slewing transients, simplifying front-end design.
Typical applications include precision industrial process control, medical instrumentation, optical network power monitoring, vibration analysis, and high-accuracy multi-channel data-acquisition systems. The wide input range and parallel interface are well suited to FPGAs and DSPs in motor control and power-quality monitoring.
When designing with this part, place a low-ESR 1 uF ceramic bypass capacitor directly on the +VA and +VBD pins, plus a 10 uF bulk capacitor, to suppress supply-induced conversion noise. Use a low-impedance ground plane and keep analog and digital return currents separated to within 1 inch of the device.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and PCB design guidance not found in a single source on DigiKey, Mouser, or the TI product folder.
بدائل مباشرة لـ ADS8383IPFBTG4 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADS8383IPFBTG4 (نفس عامل الشكل والبصمة) — يختلف في Package, Input Type, Resolution, Architecture, Sample Rate.
ADS8383IPFBRG4
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS8383IPFBT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADS8381IBPFBR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS8382IRHPR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS8342IBPFBR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS8343EB/2K5G4
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ADS8383IPFBTG4 الحدود القصوى والخصائص الكهربائية
| الدقة | 18 bits |
| Sample Rate | 500 kSPS |
| Architecture | SAR (Successive Approximation) |
| Input Channels | 1 (single-ended, unipolar) |
| Analog Supply Voltage (+VA) | 5 V |
| Digital Supply Voltage (+VBD) | 5 V (3.3 V logic compatible) |
| Analog Input Range | 0 V to +VREF (default); 0 V to 2 x VREF with PGA gain = 2 |
| Reference Voltage (VREF) | 4.0 V typ, 4.5 V max |
| Conversion Time | 1.52 us typ |
| الواجهة | Parallel, 18-/16-/8-bit selectable |
| INL (max) | 2.5 LSB |
| DNL (max) | 1.5 LSB (-0.99 to +2.5 LSB) |
| SNR | 84 dB typ at 100 kHz input |
| Power Dissipation (500 kSPS) | 110 mW typ |
| Power Dissipation (10 kSPS) | 8 mW typ |
| Aperture Delay | 4.5 ns |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| العلبة | 48-pin TQFP (PFB), 7 mm x 7 mm |
| حالة RoHS | Compliant |
| Lead-Free | Yes |
تكوين أطراف ADS8383IPFBTG4
| دبوس 1 | DVDD — Digital supply (3.3V or 5V) |
| دبوس 2 | DGND — Digital ground |
| دبوس 3 | DB0 — Data bit 0 (LSB) |
| دبوس 4 | DB1 — Data bit 1 |
| دبوس 5 | DB2 — Data bit 2 |
| دبوس 6 | DB3 — Data bit 3 |
| دبوس 7 | DB4 — Data bit 4 |
| دبوس 8 | DB5 — Data bit 5 |
| دبوس 9 | DB6 — Data bit 6 |
| دبوس 10 | DB7 — Data bit 7 |
| دبوس 11 | DB8 — Data bit 8 |
| دبوس 12 | DB9 — Data bit 9 |
| دبوس 13 | DB10 — Data bit 10 |
| دبوس 14 | DB11 — Data bit 11 |
| دبوس 15 | DB12 — Data bit 12 |
| دبوس 16 | DB13 — Data bit 13 |
| دبوس 17 | DB14 — Data bit 14 |
| دبوس 18 | DB15 — Data bit 15 |
| دبوس 19 | DB16 — Data bit 16 |
| دبوس 20 | DB17 — Data bit 17 (MSB) |
| دبوس 21 | BYTE — 8/16/18-bit mode select |
| دبوس 22 | SEQ — Sequential mode select |
| دبوس 23 | /BUSY — Conversion-in-progress (active low) |
| دبوس 24 | /CS — Chip select (active low) |
| دبوس 25 | /RD — Read strobe (active low) |
| دبوس 26 | /CONVST — Conversion start (active low) |
| دبوس 27 | RESET — Reset input |
| دبوس 28 | TAG — Tag input for data tagging |
| دبوس 29 | DGND — Digital ground |
| دبوس 30 | DVDD — Digital supply |
| دبوس 31 | NC — Not connected |
| دبوس 32 | NC — Not connected |
| دبوس 33 | VREF — Reference voltage input |
| دبوس 34 | REFGND — Reference ground |
| دبوس 35 | REFM — Reference minus / REFGND |
| دبوس 36 | AGND — Analog ground |
| دبوس 37 | AVDD — Analog supply (+5V) |
| دبوس 38 | AINP — Analog input positive |
| دبوس 39 | AINM — Analog input negative / AGND |
| دبوس 40 | AGND — Analog ground |
| دبوس 41 | AVDD — Analog supply (+5V) |
| دبوس 42 | NC — Not connected |
| دبوس 43 | NC — Not connected |
| دبوس 44 | AGND — Analog ground |
| دبوس 45 | AVDD — Analog supply (+5V) |
| دبوس 46 | NC — Not connected |
| دبوس 47 | NC — Not connected |
| دبوس 48 | AVDD — Analog supply (+5V) |
التطبيقات النموذجية
ADS8383IPFBTG4 مناسب لـ 6 التطبيقs: Industrial Process Control / PLC, Medical Instrumentation & Patient Monitoring, Optical Network Power Monitoring, Vibration Analysis & Condition Monitoring, Power Quality & Energy Metering, Precision Data-Acquisition Systems (DAQ).
Industrial Process Control / PLC
The ADS8383IPFBTG4's 18-bit no-missing-codes resolution, -40C to +85C industrial temperature range, and 500 kSPS throughput make it a strong fit for PLC analog input modules in industrial process control. Its 0 V to +VREF unipolar input accepts 4-20 mA loop outputs via a 250 ohm current-sense resistor, while 84 dB SNR at 100 kHz input supports high-accuracy measurement of pressure, temperature, and flow transducers. The 48-TQFP package reflow-mounts reliably on standard FR-4, and the parallel interface connects directly to industrial FPGAs in PLC backplanes.
موصى به
Medical Instrumentation & Patient Monitoring
In medical instrumentation such as infusion pumps, blood analyzers, and patient monitors, the ADS8383IPFBTG4 delivers 18-bit resolution at 500 kSPS to digitize low-frequency biosignals with high dynamic range. The integrated sample-and-hold and 4.5 ns aperture delay preserve phase accuracy on ECG and EEG front-ends, while the parallel interface streams data to a DSP for real-time DSP filtering. Its 110 mW power dissipation at full throughput is acceptable for line-powered equipment, and the industrial temperature range supports continuous operation in clinical environments.
موصى به
Optical Network Power Monitoring
Optical line cards and transponder modules use the ADS8383IPFBTG4 to digitize the output of photodiode transimpedance amplifiers monitoring transmit laser power. The 500 kSPS sample rate and 18-bit resolution enable tight closed-loop control of laser bias and modulation currents, stabilizing optical output power across temperature. The device's 84 dB SNR rejects ambient optical noise, and the parallel interface feeds FPGA-based control loops that adjust laser driver DACs in microseconds. Industrial temperature range suits outdoor OLT chassis.
موصى به
Vibration Analysis & Condition Monitoring
Predictive maintenance systems in motors, pumps, and rotating machinery use the ADS8383IPFBTG4 to digitize accelerometer signals for FFT-based vibration analysis. The 500 kSPS sample rate captures vibration harmonics up to 200 kHz (Nyquist), while 18-bit resolution distinguishes early-stage bearing faults by 0.001 g spectral peaks. The deterministic 1.52 us SAR latency simplifies phase-coherent analysis across multiple channels when combined with the ADS8382IRHPR for 4-axis simultaneous sampling on the same PCB footprint.
موصى به
Power Quality & Energy Metering
Three-phase power-quality analyzers and revenue-grade energy meters use the ADS8383IPFBTG4 to digitize voltage and current waveforms with 18-bit accuracy at 500 kSPS. The high dynamic range supports harmonic analysis to the 50th harmonic at 50/60 Hz mains frequency, and the wide input range accommodates current-transformer (CT) and voltage-divider (VT) front-ends. Industrial temperature rating and SAR determinism make it a reliable core for IEC 62053-22 class 0.2S meters deployed in substations and industrial switchgear.
موصى به
Precision Data-Acquisition Systems (DAQ)
Multi-channel DAQ boards for test and measurement applications use the ADS8383IPFBTG4 for the highest-resolution single-channel inputs alongside the ADS8382IRHPR for multiplexed channels. The 18-bit/500 kSPS performance and 48-TQFP package allow up to 8 channels per 4-layer PCB while maintaining 84 dB SNR, supporting LXI-class modular instruments. The parallel interface streams samples directly into FPGA acquisition buffers, enabling sustained 500 kSPS per channel with deterministic timing for waveform capture and protocol analysis.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADS8383IPFBTG4 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADS8383IPFBRG4 | ADS8383IPFBT | ADS8381IBPFBR | ADS8382IRHPR | ADS8342IBPFBR | ADS8343EB/2K5G4 |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm | 48-QFN (RHP) | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm |
| Resolution | 18 bits | 18 bits | 18 bits | 18 bits | 16 bits | 16 bits | 12 bits |
| Sample Rate | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 250 kSPS | 100 kSPS |
| Input Channels | 1 (single-ended) | 1 (single-ended) | 1 (single-ended) | 1 (single-ended) | 4 (single-ended) | 4 (single-ended) | 4 (single-ended) |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR | SAR |
| Interface | Parallel (18/16/8-bit) | Parallel (18/16/8-bit) | Parallel (18/16/8-bit) | Parallel (18/16/8-bit) | Serial | Serial | Serial |
| Analog Supply | 5V | 5V | 5V | 5V | 5V | 5V | 2.7V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| 1-piece Price (USD, approx) | 18.75 | 18.75 | 18.75 | 16.50 | 14.20 | 9.85 | 5.40 |
أبرز الفروقات
- Industry-leading 18-bit single-channel resolution at 500 kSPS (مقابلADS8382IRHPR)
- Parallel interface eliminates SPI bit-banging overhead (مقابلADS8342IBPFBR / ADS8343EB/2K5G4)
- Genuine industrial temperature grade with single 5V supply (مقابلADS8343EB/2K5G4)
ملاحظات التصميم
Place a 0.1 uF X7R ceramic decoupling capacitor within 2 mm of each AVDD pin (37, 41, 45, 48) and each DVDD pin (1, 30) to suppress high-frequency noise during conversion. Add a 10 uF tantalum or ceramic bulk capacitor on the analog supply rail near the device. The +VA and +VBD supplies should be powered from a low-noise LDO (e.g., TPS7A4701) and decoupled separately; tying AVDD to a noisy 5V switching node will inject 1-2 LSB of conversion noise. Reference: TI ADS8383 datasheet, Section 'Power Supply'.
Use a continuous ground plane under the device and partition it into separate analog (AGND/REFGND) and digital (DGND) islands connected at a single point directly under the device. Route analog input traces (AINP/AINM) as a differential pair to a nearby op-amp (e.g., OPA2277) buffer, and route data bus traces DB0-DB17 matched-length to avoid skew on the 18-bit parallel output. Keep noisy digital lines (RD, CS, CONVST) at least 5 mm away from the analog input and VREF pins.
Drive the AINP input through a low-impedance op-amp buffer (e.g., OPA2277 or AD8628) to prevent source-impedance-induced INL degradation; the ADS8383 samples the input on the falling edge of CONVST, so the buffer must settle to within 0.5 LSB (10 uV at 5V VREF) before acquisition ends. For VREF, use a 4.5V low-noise reference such as REF5045 with a 0.1 uF and 10 uF bypass network; noise on VREF directly couples into SNR and linearity.
Do not leave unused data bus pins (DB16/DB17 for 16-bit mode) floating - tie them to DGND through 10 kohm resistors to avoid CMOS input oscillation. Do not apply a negative voltage to AINP when AGND is at 0V - the input protection diodes will forward-bias and degrade linearity. The /CONVST pin should be a clean falling edge; mechanical switch bounce or slow edges will cause aperture jitter exceeding the 50 ps spec. Always issue a hardware RESET after power-up before the first conversion.
معلومات الامتثال
RoHS compliant per TI product page. Industrial -40C to +85C temperature grade (I-suffix). Not AEC-Q100 qualified; for automotive, consider the ADS8383-Q1 variant if available in portfolio. Lead-free reflow-compatible 48-TQFP package.
