ADS8382IRHPR - 18-bit 600kSPS SAR ADC | Texas Instruments
MPN: ADS8382IRHPR ✓ פעילADS8382IRHPR סקירה
A SAR ADC is a precision data converter that uses a charge-redistribution capacitor array and a successive-approximation algorithm to digitize an analog input one bit per clock cycle. SAR converters sit within the broader taxonomy of analog-to-digital converters -> data converters -> signal-chain ICs -> mixed-signal ICs -> semiconductors. The pseudo-bipolar, fully differential input topology of the ADS8382 allows direct digitization of signals that swing around a common-mode voltage, which is useful for industrial sensors and instrumentation front-ends.
Key headline specifications include 18-bit resolution, 600 kSPS sample rate, 1.16 microsecond conversion time, and 0.0019 percent integral nonlinearity (INL). The device supports both external and internal voltage references and provides a serial interface that simplifies board routing. Its micropower architecture balances throughput with low power dissipation, making it appropriate for multi-channel data-acquisition systems where channel density and thermal budget matter.
The internal architecture is a capacitor-based SAR core with inherent track-and-hold, followed by a digital correction engine that achieves the specified linearity. The high-speed CMOS serial interface reduces pin count compared with parallel-output ADCs of the same speed class, leaving more board real-estate for analog front-end conditioning. The RHP-28 6x6 mm QFN package has a low thermal resistance suitable for the power level of a 600 kSPS SAR.
Typical applications include industrial process control, multichannel data-acquisition boards, medical instrumentation such as patient monitors, optical sensor front-ends, and precision weigh scales. The serial interface is also convenient for isolated data-acquisition designs where galvanic isolation favors fewer digital traces.
When designing with the ADS8382IRHPR, place the 0.1 microfar decoupling capacitor as close as possible to the AVDD pin and respect the reference decoupling topology recommended in the manufacturer datasheet. Designers should also consider using the ADS8382IRHPT (tape-and-reel variant) and ADS8382IBRHPR (extended temperature grade) as drop-in alternates within the same footprint.
This page synthesizes distributor pricing, drop-in alternates, and practical design notes not found in the manufacturer datasheet alone.
חלופות תחליף ישיר עבור ADS8382IRHPR — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ADS8382IRHPR (אותו גורם צורה וטביעת רגל) — שונים ב Package, Input Type, Sample Rate, Conversion Time, Data Interface.
ADS8382IRHPT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ADS8382IBRHPR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ADS8382IBRHPT
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
ADS8482IRGZR
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADS8472IRGZR
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ADS8382IRHPR דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 18 bits |
| Sample Rate | 600 kSPS |
| Conversion Time | 1.16 microsecond (approx.) |
| Number of Channels | 1 input |
| Architecture | SAR with inherent sample-and-hold |
| Input Type | Fully differential pseudo-bipolar |
| Integral Nonlinearity (INL) | 0.0019 % (approx.) |
| Data Interface | Serial (CMOS, up to 40 MHz SCLK) |
| Analog Supply Voltage | 5 V (typical single supply) |
| Reference | External or internal |
| טמפרטורת פעולה | -40C to +85C |
| מארז | 28-pin QFN (RHP) 6x6 mm with exposed pad |
| סוג הרכבה | Surface Mount |
| Packaging | Tape & Reel (TR) |
| סטטוס RoHS | Compliant |
תצורת פינים של ADS8382IRHPR
| פין 1 | REFP — Reference capacitor positive terminal |
| פין 2 | REFN — Reference capacitor negative terminal |
| פין 3 | REFM — Reference mode select |
| פין 4 | REF — Reference input / output |
| פין 5 | AVDD — Analog 5V supply |
| פין 6 | AGND — Analog ground |
| פין 7 | IN+ — Differential analog input positive |
| פין 8 | IN- — Differential analog input negative |
| פין 9 | AVDD — Analog 5V supply |
| פין 10 | AGND — Analog ground |
| פין 11 | DGND — Digital ground |
| פין 12 | DVDD — Digital supply |
| פין 13 | /CONVST — Conversion start (active low) |
| פין 14 | /CS — Chip select (active low) |
| פין 15 | SCLK — Serial clock input |
| פין 16 | SDO — Serial data output |
| פין 17 | SDI — Serial data input |
| פין 18 | TAG — Tag input for output data |
| פין 19 | BUSY — Conversion busy indicator |
| פין 20 | RESET — Reset input |
| פין 21 | PD — Power-down input |
| פין 22 | NC — Not connected |
| פין 23 | NC — Not connected |
| פין 24 | AVDD — Analog 5V supply |
| פין 25 | AGND — Analog ground |
| פין 26 | AVDD — Analog 5V supply |
| פין 27 | AGND — Analog ground |
| פין 28 | EP — Exposed thermal pad (connect to AGND) |
יישומים טיפוסיים
ADS8382IRHPR מתאים עבור 6 יישוםs: Industrial Process Control Data Acquisition, Medical Patient Monitoring Instrumentation, Precision Weigh Scales and Load Cell Digitization, Optical Sensor Front-End Digitization, Multichannel Data Acquisition Modules, Isolated Industrial Sensor Interfaces.
Industrial Process Control Data Acquisition
The ADS8382IRHPR's 18-bit resolution and 600 kSPS throughput match the precision and bandwidth required for industrial process control loops where 4-20 mA sensor signals are digitized for PID control. Its fully differential pseudo-bipolar input rejects common-mode noise from long sensor cables in factory environments, while the serial interface simplifies routing across isolation barriers. The 5-V single-supply operation aligns with industrial 24V-derived rails, and the -40C to +85C temperature range covers cabinet-level deployments. The 0.0019% INL ensures measurement repeatability for closed-loop control.
מומלץ
Medical Patient Monitoring Instrumentation
Medical patient monitors demand low-noise, high-linearity ADCs to digitize ECG, SpO2, and temperature front-ends. The ADS8382IRHPR delivers 18-bit ENOB-grade performance with 0.0019% INL, ensuring measurement fidelity across the dynamic range of bioelectric signals. Its pseudo-bipolar differential input accepts signals biased around a mid-supply common-mode, which is the typical output of ECG instrumentation amplifiers. The 28-QFN package is small enough for portable monitor form factors while the serial interface reduces digital emissions near sensitive analog front ends.
מומלץ
Precision Weigh Scales and Load Cell Digitization
Weigh scales and force-measurement systems require ADCs with high absolute accuracy and very low integral nonlinearity to resolve sub-milligram changes in strain-gauge bridge outputs. The ADS8382IRHPR's 18-bit resolution and tight INL make it well suited for digitizing the low-level differential signals from load cells without requiring expensive 24-bit sigma-delta converters. The 600 kSPS sample rate enables oversampling to push effective resolution beyond the nominal bit count, while the serial interface supports integration with battery-powered scale electronics where every trace counts.
מומלץ
Optical Sensor Front-End Digitization
Photodiode and avalanche-photodiode (APD) front-ends produce low-amplitude currents that benefit from high-resolution differential ADCs. The ADS8382IRHPR's fully differential pseudo-bipolar input accepts transimpedance-amplifier outputs biased around a mid-rail common-mode, while its 600 kSPS rate supports pulsed-light measurements such as LIDAR and time-of-flight receivers. The 18-bit dynamic range enables simultaneous capture of strong and weak return signals without gain switching, simplifying the analog signal chain. The serial interface keeps digital traces minimal near sensitive photodetector preamps.
מומלץ
Multichannel Data Acquisition Modules
Multichannel DAQ cards and PLC analog input modules use a serial-output ADC to reduce digital pin count and ease isolation barrier design. The ADS8382IRHPR's serial interface runs up to 40 MHz SCLK, allowing many converters to share a single SPI bus across isolators without bandwidth bottlenecks. Its 28-QFN footprint is compact enough for high-density analog input cards. With 600 kSPS per channel, a bank of eight multiplexed converters can deliver aggregate throughput well above 100 kSPS per channel for vibration, acoustic, or general-purpose industrial measurements.
מומלץ
Isolated Industrial Sensor Interfaces
Industrial sensors feeding PLCs and motor drives require galvanic isolation for safety and noise immunity. The ADS8382IRHPR's serial interface is well suited for digital isolators because only a few signals (SDO, SCLK, /CS, /CONVST) must cross the barrier, reducing isolator cost and certification complexity. The 5-V supply aligns with the field-side power, while the 600 kSPS rate supports closed-loop control update rates typical of servo drives. Differential pseudo-bipolar input rejects the large common-mode transients found in motor drive environments.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ADS8382IRHPR — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ADS8382IRHPT | ADS8382IBRHPR | ADS8382IBRHPT | ADS8482IRGZR | ADS8472IRGZR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-QFN (RHP) 6x6 mm | 28-QFN (RHP) 6x6 mm - same | 28-QFN (RHP) 6x6 mm - same | 28-QFN (RHP) 6x6 mm - same | 48-QFN - same QFN family | 48-QFN - same QFN family |
| Resolution | 18 bits | 18 bits | 18 bits | 18 bits | 18 bits | 18 bits |
| Sample Rate | 600 kSPS | 600 kSPS | 600 kSPS | 600 kSPS | 1000 kSPS | 1000 kSPS |
| Input Type | Fully differential pseudo-bipolar | Fully differential pseudo-bipolar | Fully differential pseudo-bipolar | Fully differential pseudo-bipolar | Fully differential bipolar | Fully differential bipolar |
| Data Interface | Serial (SPI) | Serial (SPI) | Serial (SPI) | Serial (SPI) | Parallel / byte | Parallel / byte |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C (extended grade) | -40C to +85C (extended grade) | -40C to +85C | -40C to +85C |
| Tape-and-Reel Suffix | R (standard reel) | T (reverse reel) | R (extended grade, standard reel) | T (extended grade, reverse reel) | R (48-QFN, standard reel) | R (48-QFN, standard reel) |
מבדילים עיקריים
- True 18-bit resolution at 600 kSPS in serial-output 28-QFN (לעומתADS8482IRGZR)
- Fully differential pseudo-bipolar input simplifies sensor front-end (לעומתADS8381IBPFBR)
- Multiple suffix variants (I, T, IT) on same die enable drop-in inventory flexibility (לעומתADS8382IRHPT)
הערות תכנון
Decouple the AVDD pin with a 0.1 microfar low-ESR ceramic capacitor placed within 2 mm of the pin, and add a 10 microfar tantalum or ceramic bulk capacitor on each analog rail. The ADS8382IRHPR datasheet recommends a clean analog ground separate from the digital ground, joined at a single point near the IC. Avoid switching supplies in the analog path because the SAR comparator is sensitive to high-frequency rail noise.
Route the serial interface traces (SCLK, SDO, /CS, /CONVST) away from the analog input traces to avoid digital-to-analog coupling. The exposed thermal pad (pin 28) must be soldered to a continuous ground plane with multiple thermal vias to keep junction temperature within limits. Reference decoupling capacitors should be placed close to the REFP and REFN pins with short, direct traces to minimize reference noise and INL degradation.
Do not drive the analog input beyond the absolute input range specified in the datasheet or the input ESD protection will degrade. Ensure the reference voltage is well decoupled and stable during conversion, as reference noise directly appears as conversion noise. When using the internal reference, verify its accuracy over temperature before relying on it for absolute measurements. If absolute gain error matters, use an external precision reference.
מידע על תאימות
RoHS compliant per TI product page. Not AEC-Q100 qualified - this is an industrial-grade converter. Lead-free finish per TI ordering nomenclature.
