ADS8380IRHPRG4 - 18-Bit 600kSPS Pseudo-Diff SAR ADC | Texas Instruments
MPN: ADS8380IRHPRG4 ✓ Hoạt độngADS8380IRHPRG4 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADS8380IRHPRG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADS8380IRHPRG4 (cùng hình factor và footprint) — khác nhau ở Architecture, Data Interface, Input Configuration, Number of Channels, Resolution.
ADS8380IRHP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8380IBRHPR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8381IBRHPR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8382IBRHPR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8380IRHPTG4
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADS8380IRHPRG4 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 18 bit |
| Tỷ lệ lấy mẫu | 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 |
| Hộp / Vỏ | 28-VQFN Exposed Pad (RHP) |
| Số chân | 28 |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Trạng thái RoHS | Compliant (-G4 lead-free finish) |
Cấu hình chân ADS8380IRHPRG4
| Chân 1 | AGND — Analog ground return |
| Chân 2 | AVDD — Analog supply (5 V typical) |
| Chân 3 | REF — Reference voltage input/output |
| Chân 4 | REFGND — Reference ground |
| Chân 5 | IN+ — Analog input positive (pseudo-differential) |
| Chân 6 | IN- — Analog input negative / common-mode reference |
| Chân 7 | AVDD — Analog supply (additional pin) |
| Chân 8 | AGND — Analog ground (additional pin) |
| Chân 9 | DGND — Digital ground |
| Chân 10 | DVDD — Digital supply |
| Chân 11 | CS — Chip-select (active low) |
| Chân 12 | SCLK — Serial clock input (up to 40 MHz) |
| Chân 13 | SDO — Serial data output |
| Chân 14 | BUSY — Conversion-in-progress indicator |
| Chân 15 | DGD — Digital ground (additional) |
| Chân 16 | NC — Not connected (per datasheet) |
| Chân 17 | NC — Not connected (per datasheet) |
| Chân 18 | NC — Not connected (per datasheet) |
| Chân 19 | NC — Not connected (per datasheet) |
| Chân 20 | NC — Not connected (per datasheet) |
| Chân 21 | NC — Not connected (per datasheet) |
| Chân 22 | NC — Not connected (per datasheet) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | NC — Not connected (per datasheet) |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
ADS8380IRHPRG4 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS8380IRHPRG4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- True 18-bit SAR resolution with zero latency (vsADS6425IRGCR)
- Compact 28-VQFN exposed-pad footprint with 600 kSPS throughput (vsADS7817UBG4)
- Industrial -40C to +85C temperature range with 40 MHz SPI interface (vsADS7822PG4)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
