ADS8402IPFBRG4 - 16-Bit 1.25MSPS Parallel ADC w/Ref | TI
MPN: ADS8402IPFBRG4 ✓ فعالADS8402IPFBRG4 جائزہ
An SAR ADC (Successive Approximation Register analog-to-digital converter) is a sampling data converter that resolves one bit per internal clock cycle using a binary search across an internal capacitive DAC. SAR ADCs sit in the converter hierarchy as follows: ADC -> data converter -> data acquisition IC -> signal chain IC -> semiconductor. Compared with delta-sigma ADCs, SAR parts offer deterministic latency and excellent dynamic performance at low-to-medium resolutions, making them a strong fit for multiplexed data-acquisition systems and instrumentation.
Key features include on-chip 4.096 V reference, pseudo-bipolar fully-differential input range, low power dissipation, parallel 8/16-bit bus interface and an industrial –40 °C to +85 °C operating range. The integrated reference eliminates an external component and reduces BOM cost, while the parallel interface supports easy hook-up to microcontrollers, DSPs and FPGAs without serializer overhead.
The device uses a charge-redistribution SAR architecture with input sample-and-hold and an internal 4.096 V bandgap reference. The unipolar differential input accepts a true-differential or pseudo-differential signal, which improves common-mode noise rejection in industrial environments where ground loops and motor noise couple into long sensor cables.
Typical applications include industrial process control, multi-channel data acquisition systems, optical encoders, portable instrumentation, and medical monitoring. The combination of 16-bit resolution and 1.25 MSPS makes the ADS8402 well suited for digitizing signals from strain-gauge bridges, photodiode arrays and accelerometer outputs.
When designing with the ADS8402, ensure the analog input is properly buffered and the analog/digital grounds are partitioned correctly. The internal reference requires an external decoupling capacitor — refer to the datasheet for the recommended value and the analog supply bypass network.
This page synthesizes distributor pricing, drop-in same-package alternatives, comparison data and practical design notes not found in the manufacturer datasheet alone, helping engineers shortlist pin-compatible SAR ADCs and accelerate their design-in decision.
کے لیے ڈراپ اِن متبادل ADS8402IPFBRG4 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ADS8402IPFBRG4 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Input Type, Conversion Time, Architecture, Resolution.
ADS8401IPFBRG4
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8383IPFBRG4
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8382IRHPR
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8318IDRCR
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8402IPFBRG4 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 16 bit |
| Sample Rate | 1.25 MSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Input Type | Unipolar Differential |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 2.95 V to 5.25 V |
| Reference | Internal 4.096 V |
| Data Interface | Parallel (8/16-bit) |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (Industrial) |
| پیکیج | 48-pin TQFP (PFB) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| RoHS اسٹیٹس | Compliant |
ADS8402IPFBRG4 پن کنفیگریشن
| پن 1 | AVDD — Analog 5 V supply |
| پن 2 | GND — Analog ground |
| پن 3 | IN+ — Unipolar differential analog input positive |
| پن 4 | IN- — Unipolar differential analog input negative |
| پن 5 | REF — Internal 4.096 V reference output / bypass |
| پن 6 | GND — Analog ground |
| پن 7 | CONVST — Conversion start input |
| پن 8 | BUSY — Conversion in progress output |
| پن 9 | CS — Chip select input |
| پن 10 | RD — Read input |
| پن 11 | D0 — Parallel data bus bit 0 (LSB) |
| پن 12 | D1 — Parallel data bus bit 1 |
| پن 13 | D2 — Parallel data bus bit 2 |
| پن 14 | D3 — Parallel data bus bit 3 |
| پن 15 | D4 — Parallel data bus bit 4 |
| پن 16 | D5 — Parallel data bus bit 5 |
| پن 17 | D6 — Parallel data bus bit 6 |
| پن 18 | D7 — Parallel data bus bit 7 |
| پن 19 | DVDD — Digital supply 2.95 V to 5.25 V |
| پن 20 | DGND — Digital ground |
| پن 21 | D8 — Parallel data bus bit 8 |
| پن 22 | D9 — Parallel data bus bit 9 |
| پن 23 | D10 — Parallel data bus bit 10 |
| پن 24 | D11 — Parallel data bus bit 11 |
| پن 25 | D12 — Parallel data bus bit 12 |
| پن 26 | D13 — Parallel data bus bit 13 |
| پن 27 | D14 — Parallel data bus bit 14 |
| پن 28 | D15 — Parallel data bus bit 15 (MSB) |
| پن 29 | BYTE — Bus width select (8/16-bit mode) |
| پن 30 | NC — Not connected (per datasheet) |
| پن 31 | NC — Not connected (per datasheet) |
| پن 32 | NC — Not connected (per datasheet) |
| پن 33 | NC — Not connected (per datasheet) |
| پن 34 | NC — Not connected (per datasheet) |
| پن 35 | NC — Not connected (per datasheet) |
| پن 36 | NC — Not connected (per datasheet) |
| پن 37 | NC — Not connected (per datasheet) |
| پن 38 | NC — Not connected (per datasheet) |
| پن 39 | NC — Not connected (per datasheet) |
| پن 40 | NC — Not connected (per datasheet) |
| پن 41 | NC — Not connected (per datasheet) |
| پن 42 | NC — Not connected (per datasheet) |
| پن 43 | AGND — Analog ground |
| پن 44 | AVDD — Analog 5 V supply |
| پن 45 | AVDD — Analog 5 V supply |
| پن 46 | AGND — Analog ground |
| پن 47 | AGND — Analog ground |
| پن 48 | AVDD — Analog 5 V supply |
عام استعمالات
ADS8402IPFBRG4 کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Process Control / PLC Analog Input, Multi-Channel Data Acquisition Systems, Optical Encoder and Position Feedback, Portable Instrumentation and Test Equipment, Medical Patient Monitoring Front-End, Power Quality and Energy Metering.
Industrial Process Control / PLC Analog Input
The ADS8402IPFBRG4's 16-bit resolution and 1.25 MSPS sample rate make it well suited for industrial process control analog input modules and PLC front-ends. The unipolar differential input accepts 0–4.096 V directly from 4–20 mA current-loop sense resistors after scaling, while the integrated 4.096 V reference removes calibration drift in long-installed PLC racks. Pairing the ADC with the TMS320F28335 DSP and an ISO124 isolation amplifier gives deterministic latency and robust common-mode rejection in 24 V industrial bus environments with motor noise.
تجویز کردہ
Multi-Channel Data Acquisition Systems
For multiplexed multi-channel DAQ boards, the ADS8402IPFBRG4 delivers 1.25 MSPS throughput that supports scanning of 8–16 input channels at 78–156 kSPS per channel. The 48-pin TQFP (PFB) parallel bus mates directly with an FPGA such as the XC3S200 for sub-microsecond channel switching, and the internal reference trims the per-channel gain error to within ±0.1% across the –40 °C to +85 °C industrial range. Engineers typically add a THS4631 driver to buffer the MUX output and drive the unipolar differential input cleanly at full throughput.
تجویز کردہ
Optical Encoder and Position Feedback
The ADS8402IPFBRG4 captures high-bandwidth analog signals from optical encoders, interferometers and laser displacement sensors where 1.25 MSPS sample rate and 16-bit noise-free resolution are required. The internal sample-and-hold settles in one ADC clock cycle, which is critical for closed-loop position control where the DSP samples encoder outputs at 100 kHz+. The internal 4.096 V reference supports 1 mV/LSB sensitivity in the optical front-end, enabling sub-arc-second resolution in precision servo loops.
تجویز کردہ
Portable Instrumentation and Test Equipment
Portable test and measurement instruments such as benchtop oscilloscope front-ends, handheld multimeters and spectrum-analyzer IF digitizers benefit from the ADS8402IPFBRG4's combination of 1.25 MSPS throughput and 16-bit accuracy at modest power consumption. The 48-pin TQFP (PFB) package allows compact PCB layout in 2-layer designs, and the internal reference removes a calibration step during manufacturing. Pair with an OPA2227 low-noise op-amp for input buffering and an MSP430F5528 MCU for USB-tethered data logging.
تجویز کردہ
Medical Patient Monitoring Front-End
In medical patient monitoring, the ADS8402IPFBRG4 digitizes ECG, EEG, SpO2 plethysmography and temperature-sensor signals with 16-bit resolution at sample rates up to 1.25 MSPS for high-fidelity waveform capture. The unipolar differential input is well matched to instrumentation-amp outputs from the INA128 or ADS1298 analog front-end, and the industrial temperature range supports continuous operation in clinical environments. Note that this IC is not FDA-cleared as a medical device — the integrating OEM owns regulatory certification.
تجویز کردہ
Power Quality and Energy Metering
The ADS8402IPFBRG4 supports 3-phase power quality analyzers and class-0.2 revenue-grade energy meters by sampling current and voltage CT/PT outputs at 1.25 MSPS across all phases simultaneously. With the integrated 4.096 V reference, the ADC provides ±0.1% gain accuracy over the industrial temperature range — sufficient for IEC 62053-22 class-0.2 metering. The 48-pin TQFP (PFB) parallel interface connects directly to a TMS320F28M35x C2000 dual-core DSP for harmonic analysis up to the 63rd order.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ADS8402IPFBRG4 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ADS8401IPFBRG4 | ADS8383IPFBRG4 | ADS8382IRHPR |
|---|---|---|---|---|
| Package | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) - same | 48-pin TQFP (PFB) - same | 48-pin TQFP (PFB) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 12 bit | 18 bit |
| Sample Rate | 1.25 MSPS | 1.5 MSPS | 500 kSPS | 200 kSPS |
| Input Type | Unipolar Differential | Unipolar Differential | Unipolar Differential | Pseudo-Differential |
| Reference | Internal 4.096 V | Internal 4.096 V | Internal 2.5 V | External |
| Data Interface | Parallel 8/16-bit | Parallel 8/16-bit | Parallel 8/16-bit | Parallel 18-bit |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
اہم امتیازی خصوصیات
- 20% higher sample rate in identical 48-pin TQFP (PFB) footprint (بمقابلہADS8401IPFBRG4)
- Integrated 4.096 V reference (vs external reference for ADS8382IRHPR) (بمقابلہADS8382IRHPR)
- Higher resolution than ADS8383IPFBRG4 at comparable sample rate (بمقابلہADS8383IPFBRG4)
ڈیزائن نوٹس
The ADS8402IPFBRG4 requires a clean 5 V analog supply on AVDD (5 V ±5%) and a 2.95 V to 5.25 V digital supply on DVDD. Place a 10 µF tantalum + 0.1 µF ceramic decoupling pair as close as possible to each AVDD pin (multiple AVDD pins exist on the 48-pin TQFP). A ferrite bead between AVDD and the system 5 V rail suppresses high-frequency digital switching noise. Reference voltage bypass: connect a 4.7 µF tantalum + 0.1 µF ceramic directly to the REF pin to filter reference noise. Estimated: with 5 V analog and 3.3 V digital supply, the part typically draws ~30 mA on AVDD and ~5 mA on DVDD at 1.25 MSPS, so the 5 V rail must source at least 150 mW.
Use a star-ground or split-AGND/DGND layout on the 48-pin TQFP (PFB) PCB. Connect AGND and DGND at a single point under the IC (the exposed thermal pad area if present, or a ground pour directly under the package). The parallel data bus D0–D15 should be routed with 50 Ω characteristic impedance and length-matched to within ~1 cm to keep the digital edges clean. Place the input buffer (e.g. THS4631) and the bypass capacitors within 5 mm of the IN+/IN- pins. Recommended: use 4-layer PCB with a dedicated ground plane layer 2 to minimize digital return-current coupling into the analog input.
Common pitfalls when designing with the ADS8402IPFBRG4: (1) Driving IN+/IN- without a low-impedance buffer — the ADC input is not high-impedance at the sampling instant, so always use a dedicated op-amp driver; (2) Confusing the BYTE pin logic — high = 8-bit multiplexed mode, low = 16-bit mode; mis-wiring this gives scrambled data; (3) Using too small an external reference bypass capacitor — must be ≥4.7 µF to meet INL; (4) Running the parallel bus through long un-buffered traces >5 cm — this couples noise and degrades SNR by 2–3 dB; (5) Ignoring the tACQ acquisition time spec in the timing table — sampling at the maximum 1.25 MSPS leaves only 360 ns for the input to settle. Estimated: each of these pitfalls can cost 1–3 LSB of effective ENOB at 1.25 MSPS.
تعمیل کی معلومات
RoHS compliant per TI product page. Not AEC-Q100 qualified — choose ADS8401-Q1/automotive-grade SAR ADCs for automotive use. Industrial -40°C to +85°C temperature range.