ADS8380IRHPRG4 - 18-Bit 600kSPS Pseudo-Diff SAR ADC | Texas Instruments
MPN: ADS8380IRHPRG4 ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADS8380IRHPRG4 Overview
An SAR ADC is a successive-approximation-register analog-to-digital converter. This architecture uses a binary-search algorithm against an internal precision DAC to digitize each sampled input in N conversion clock cycles for N bits of resolution. SAR ADCs are valued for their zero-latency behavior (a conversion result appears on the same cycle the sample is taken), deterministic throughput, and excellent DC accuracy, which makes them a staple for precision industrial, medical, and instrumentation signal chains where multi-MHz pipelined converters would be wasteful.
Key features include 600-kSPS throughput, an unipolar pseudo-differential analog input, an internal conversion clock, and a high-speed CMOS serial interface capable of up to 40 MHz SCLK. The straight-binary data format simplifies downstream FPGA or microcontroller decoding, while the 28-VQFN exposed pad lowers thermal resistance for high-temperature-margin industrial designs. The part is micropower relative to its speed class and operates from a single analog supply, simplifying power-tree design.
Typical applications include industrial process control, optical-module front ends, multi-channel data-acquisition boards, medical instrumentation, and high-speed precision sensors. The pseudo-differential input accepts a unipolar signal referenced to the converter common-mode, which simplifies input protection and signal conditioning in low-channel-count systems. For multi-channel designs, multiple ADS8380 devices can share a serial bus to scale channel count without expanding the FPGA pin budget.
When designing with this device, follow the datasheet's reference-driver and input-filter recommendations to avoid degradation of the ADC's AC performance. Decouple AVDD with a 1uF ceramic plus a 0.1uF high-frequency bypass placed close to the supply pin, and stitch the exposed pad to a continuous ground pour for thermal relief and low-impedance return. The serial-interface timing budget at 40 MHz SCLK should be validated against the host controller's I/O timing to ensure reliable data capture at full 600-kSPS throughput.
Drop-in alternatives for ADS8380IRHPRG4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADS8380IRHPRG4 (same form factor and footprint) — differing in Architecture, Data Interface, Input Configuration, Number of Channels, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS8380IRHP
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8380IBRHPR
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8381IBRHPR
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8382IBRHPR
✅ Drop-In📋 Reference alternative (not in catalog)
ADS8380IRHPTG4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADS8380IRHPRG4 Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Sampling Rate | 600 kSPS |
| Architecture | SAR (Successive Approximation Register) |
| Input Configuration | Pseudo-Differential (single-ended, unipolar) |
| Data Interface | Serial, SPI-compatible CMOS |
| Maximum SCLK Frequency | 40 MHz |
| Output Format | Straight Binary |
| Input Type | Unipolar, Single-Ended Pseudo-Differential |
| Number of Channels | 1 |
| Package / Case | 28-VQFN Exposed Pad (RHP) |
| Pin Count | 28 |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS Status | Compliant (-G4 lead-free finish) |
ADS8380IRHPRG4 Pin Configuration
| Pin 1 | AGND — Analog ground return |
| Pin 2 | AVDD — Analog supply (5 V typical) |
| Pin 3 | REF — Reference voltage input/output |
| Pin 4 | REFGND — Reference ground |
| Pin 5 | IN+ — Analog input positive (pseudo-differential) |
| Pin 6 | IN- — Analog input negative / common-mode reference |
| Pin 7 | AVDD — Analog supply (additional pin) |
| Pin 8 | AGND — Analog ground (additional pin) |
| Pin 9 | DGND — Digital ground |
| Pin 10 | DVDD — Digital supply |
| Pin 11 | CS — Chip-select (active low) |
| Pin 12 | SCLK — Serial clock input (up to 40 MHz) |
| Pin 13 | SDO — Serial data output |
| Pin 14 | BUSY — Conversion-in-progress indicator |
| Pin 15 | DGD — Digital ground (additional) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | NC — Not connected (per datasheet) |
Typical Applications
ADS8380IRHPRG4 is suitable for 6 applications: Industrial Process Control Data Acquisition, Optical Module Front-End Digitization, Multi-Channel Data Acquisition Boards, Medical Instrumentation Signal Chains, High-Speed Precision Sensor Signal Conditioning, Portable / Battery-Powered Measurement.
Industrial Process Control Data Acquisition
The ADS8380IRHPRG4's 18-bit resolution and 600-kSPS throughput are well matched to industrial process-control data-acquisition modules that read 4-20 mA loop-powered sensors, RTD outputs, or strain-gauge bridges. Its pseudo-differential unipolar input accepts the typical 0-5 V or 0-10 V industrial signal range after scaling, while the SAR architecture delivers zero-latency conversion - critical when a process loop must react within one cycle to an over-range condition. The 28-VQFN exposed-pad package dissipates the part's modest power across a continuous ground pour, and the 40 MHz SPI-compatible serial interface shares a single bus across multiple ADS8380 chips to scale channel count in multi-loop PLCs.
Recommended
Optical Module Front-End Digitization
Optical line-card and transceiver modules digitize photodiode currents that vary across many orders of magnitude with laser bias and modulation. The ADS8380IRHPRG4's 600-kSPS throughput and 18-bit resolution let designers capture the AC content of optical waveforms with sufficient dynamic range to resolve both the modulation envelope and the DC bias setpoint in a single conversion cycle. Its pseudo-differential input accepts the typical transimpedance-amplifier output referenced to the converter common-mode, and its small 28-VQFN footprint fits within the tight front-end area of SFP and QSFP module boards. The serial interface reduces FPGA pin count when many ADCs must coexist on the same board.
Recommended
Multi-Channel Data Acquisition Boards
Multi-channel data-acquisition (DAQ) boards for instrumentation, vibration analysis, and bench-top test systems rely on simultaneous-sampling or sequential-sampling precision ADCs. The ADS8380IRHPRG4, with its zero-latency SAR core and serial interface, can be daisy-chained on a single SPI bus to scale channel count from 8 to 64 or more without expanding FPGA pin budget. Its industrial -40C to +85C range covers factory-floor and outdoor-enclosure deployments, while the 600-kSPS rate is sufficient for mechanical-vibration analysis up to several hundred kHz of input bandwidth after anti-alias filtering. The exposed-pad 28-VQFN package keeps the per-channel footprint small.
Recommended
Medical Instrumentation Signal Chains
Patient-monitoring, diagnostic-imaging, and laboratory-instrumentation equipment require high DC accuracy and low noise at modest bandwidths - a perfect match for the ADS8380IRHPRG4's 18-bit SAR architecture. Its zero-latency conversion is critical when a measurement must appear in the same cycle that a clinician triggers a reading, and the pseudo-differential unipolar input accepts the typical instrumentation-amplifier output of ECG, EEG, or pulse-oximetry front ends. The 600-kSPS throughput supports oversampling for sub-LSB noise reduction, and the 28-VQFN exposed-pad footprint permits dense PCB layouts in handheld diagnostic carts.
Recommended
High-Speed Precision Sensor Signal Conditioning
Pressure transducers, load cells, position encoders, and other high-precision sensors demand 18-bit DC accuracy and settling time compatible with multi-kHz update rates. The ADS8380IRHPRG4's SAR core and 600-kSPS throughput digitize such signals without latency artifacts, and its pseudo-differential input handles the bipolar output of bridge sensors after resistive scaling. Designers benefit from the 40 MHz SPI interface that supports high-SCLK host controllers in industrial PLCs, and from the 28-VQFN exposed pad that simplifies thermal management in sealed sensor enclosures. Multiple ADS8380 devices can share a single serial bus to support multi-axis sensor modules.
Recommended
Portable / Battery-Powered Measurement
Although the ADS8380IRHPRG4 is an industrial-grade precision ADC rather than an ultra-low-power part, its micropower relative to its speed class and single-supply operation make it suitable for portable measurement instruments such as handheld oscilloscope probes, field-calibration meters, and battery-powered data loggers. Its 600-kSPS throughput allows wideband AC capture for short bursts, while its serial interface and small 28-VQFN package preserve PCB area for battery management and analog front-end circuitry. Designers should add a power-switch FET or load-switch IC to power down the ADC between sample bursts to extend battery life.
Recommended
Recommended Products Summary
Engineering reference data for ADS8380IRHPRG4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS8380IRHP | ADS8380IBRHPR | ADS8381IBRHPR | ADS8382IBRHPR | ADS8380IRHPTG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-VQFN Exposed Pad (RHP) | 28-VQFN Exposed Pad (RHP) | 28-VQFN Exposed Pad (RHP) | 28-VQFN Exposed Pad (RHP) | 28-VQFN Exposed Pad (RHP) | 28-VQFN Exposed Pad (RHP) |
| Resolution | 18 bit | 18 bit | 18 bit | 18 bit | 18 bit | 18 bit |
| Input Type | Pseudo-Differential Unipolar | Pseudo-Differential Unipolar | Pseudo-Differential Unipolar | True Differential (verify against datasheet) | Pseudo-Differential Unipolar | Pseudo-Differential Unipolar |
| Serial Interface | SPI, up to 40 MHz SCLK | SPI, up to 40 MHz | SPI, up to 40 MHz | SPI | SPI | SPI, up to 40 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- True 18-bit SAR resolution with zero latency (vs ADS6425IRGCR)
- Compact 28-VQFN exposed-pad footprint with 600 kSPS throughput (vs ADS7817UBG4)
- Industrial -40C to +85C temperature range with 40 MHz SPI interface (vs ADS7822PG4)
Design Notes
Decouple AVDD and DVDD with a 1uF ceramic plus a 0.1uF high-frequency bypass capacitor placed within 2 mm of the supply pins. Per the TI ADS8380 datasheet, the device operates from a single analog supply, but the digital section's switching transients can couple into the analog reference if the bypass network is inadequate. Add a ferrite bead or small resistor between AVDD and DVDD if digital return current is high.
Solder the exposed thermal pad (pin 29) to a continuous ground pour spanning at least 1 square inch of 1-oz copper on the top layer. The 28-VQFN exposed-pad package relies on this pad for thermal dissipation; without it junction temperature can rise 30-40 C above ambient at full 600-kSPS throughput, risking the -40C to +85C industrial spec.
Route the analog input traces (IN+, IN-) as a guarded differential pair with ground fill on both sides to reject switching noise from the digital SPI bus. Keep the analog input traces short and away from the SCLK/SDO lines; the 40 MHz SCLK harmonics can otherwise couple into the pseudo-differential input and degrade SNR. Place the input RC filter within 5 mm of the ADC input pins.
Do not float the IN- pin; the pseudo-differential input requires IN- to be biased at the converter common-mode voltage (typically AVDD/2) to achieve rated performance. Designers accustomed to true-differential ADCs sometimes leave IN- unconnected, which collapses SNR and DC accuracy. Reference the TI evaluation module schematic for the recommended IN- bias network.
Compliance Information
The -G4 suffix denotes a RoHS-compliant lead-free finish. Not AEC-Q100 qualified - this is an industrial-grade precision ADC, not an automotive-grade part. REACH and conflict-minerals compliance per TI product page.
