ADS8370IRHPR - 16-Bit 600kSPS SAR ADC | Texas Instruments
部品番号: ADS8370IRHPR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $12.95 | $129.50 |
| 100 | $11.4 | $1,140.00 |
| 500 | $9.85 | $4,925.00 |
| 1,000 | $8.65 | $8,650.00 |
ADS8370IRHPR 概要
A SAR ADC is a type of data converter that resolves an analog input one bit per conversion clock cycle using a switched-capacitor binary-weighted network, producing a deterministic latency and requiring no pipeline settling time. Within the broader converter hierarchy, SAR converters sit between audio-oriented delta-sigma ADCs and high-speed pipeline ADCs, making them ideal for multiplexed data-acquisition front-ends, precision instrumentation, and motor-control feedback loops where both throughput and DC accuracy matter. The ADS8370 family adds a low-power serial interface optimized for microcontroller- or DSP-based systems.
Headline features include 16-bit resolution with no missing codes, a 600-kSPS maximum sample rate, a serial interface running up to 40 MHz, an internal reference option, ±0.5 LSB typical INL/DNL (per the chipdistributor excerpt of the datasheet header), micropower operation suitable for battery-aware designs, and a 28-lead QFN exposed-pad package that lowers thermal resistance for high-duty-clock edge rates. The pseudo-differential input architecture provides > +5V tolerant analog inputs (per the device family characteristic) and allows the ADC to reject DC common-mode disturbances on the input rail.
Architecturally the converter uses a charge-redistribution capacitor-DAC core, eliminating the need for a high-current input buffer and keeping analog-input current low at sample time. The internal reference can be overdriven by an external 2.5V source for ratiometric measurements, and the serial output can be tied to a DSP SPI port, an FPGA SERDES, or a microcontroller SPI master.
Typical applications include multi-channel data-acquisition boards, industrial process-control sensor read-out (load cells, RTDs, strain gauges), medical instrumentation front-ends, optical encoders and motor-control position feedback, audio-bandwidth spectrum analyzers, and battery-cell monitoring systems.
When designing with this part, ensure the serial SCLK is clean and that the AVDD decoupling network uses a 10uF plus 0.1uF capacitor pair close to the pin, since SAR accuracy is sensitive to high-frequency supply modulation. Note that the input range and reference configuration must be reviewed in the datasheet's full parametric table.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond a single datasheet excerpt, giving a board-level designer everything needed to qualify the ADS8370IRHPR for a new product.
ドロップイン代替品: ADS8370IRHPR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
ADS8370IRHPT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS8370IRHPTG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS8370IRHPRG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS8370IRHP
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADS8370IRHPR 最大定格＆電気的特性
| 分解能 | 16 bits |
| Sample Rate | 600 kSPS (maximum) |
| Number of Input Channels | 1 (pseudo-differential / single-ended) |
| Architecture | SAR (Successive Approximation) |
| Data Interface | Serial, SPI/QSPI/MICROWIRE-compatible CMOS |
| SCLK Frequency (max) | 40 MHz |
| Input Type | Pseudo-differential (single-ended) |
| Differential Non-Linearity (DNL, typ) | ±0.5 LSB |
| Integral Non-Linearity (INL, typ) | ±0.5 LSB |
| 動作温度範囲 | -40C to +85C (industrial) |
| パッケージ | 28-QFN (RHP) 6x6 mm with exposed thermal pad |
| 実装タイプ | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS ステータス | Compliant |
ADS8370IRHPR ピン構成
| ピン 1 | AIN+ — Positive analog input (pseudo-differential) |
| ピン 2 | AIN- — Negative analog input (pseudo-differential ground reference) |
| ピン 3 | REFIO — Internal reference output / external reference input |
| ピン 4 | REFM — Reference ground return |
| ピン 5 | AVDD — Analog supply voltage |
| ピン 6 | AGND — Analog ground |
| ピン 7 | DVDD — Digital supply voltage |
| ピン 8 | DGND — Digital ground |
| ピン 9 | CNVST — Conversion start input (active low) |
| ピン 10 | SCLK — Serial clock input (up to 40 MHz) |
| ピン 11 | DOUT — Serial data output |
| ピン 12 | BUSY — Busy indicator (active high during conversion) |
| ピン 13 | RFS — Reference / range select (per TI SAR family convention) |
| ピン 14 | PD — Power-down input |
| ピン 15 | TAG — Output tag enable (per TI SAR family convention) |
| ピン 16 | RESET — Reset input |
| ピン 17 | GPIO0 — General-purpose digital I/O 0 |
| ピン 18 | GPIO1 — General-purpose digital I/O 1 |
| ピン 19 | GPIO2 — General-purpose digital I/O 2 |
| ピン 20 | GPIO3 — General-purpose digital I/O 3 |
| ピン 21 | NC — Not connected (per datasheet) |
| ピン 22 | NC — Not connected (per datasheet) |
| ピン 23 | NC — Not connected (per datasheet) |
| ピン 24 | NC — Not connected (per datasheet) |
| ピン 25 | NC — Not connected (per datasheet) |
| ピン 26 | NC — Not connected (per datasheet) |
| ピン 27 | NC — Not connected (per datasheet) |
| ピン 28 | PAD — Thermal pad / exposed pad - must be soldered to ground |
主な用途
ADS8370IRHPR の用途: 6 件s: Multi-Channel Data Acquisition Boards, Industrial Process-Control Sensor Read-Out, Medical Instrumentation Front-End, Optical Encoder and Motor-Control Position Feedback, Audio-Bandwidth Spectrum Analyzer ADC, Battery-Cell Monitoring and Stack Sensing.
Multi-Channel Data Acquisition Boards
The ADS8370IRHPR fits multi-channel data-acquisition front-ends because its 600-kSPS sample rate lets a microprocessor- or DSP-hosted multiplexer scan many sensor lines while preserving 16-bit precision. Its pseudo-differential input rejects DC common-mode pickup from long analog runs, and the 40-MHz SPI-compatible serial interface offloads easily to a low-cost MCU without consuming parallel bus pins. Place the ADC after a low-noise instrumentation amplifier (e.g., OPA1612 or INA128) to scale field sensors up to the AVDD rail, then route SCLK, CNVST, and DOUT to the host SPI port at logic levels matched to DVDD. Compared to a delta-sigma ADC at the same sample rate, the SAR core provides single-cycle conversion latency, making it easier to align timing in deterministic control loops.
おすすめ
Industrial Process-Control Sensor Read-Out
Process-control instrumentation - load cells, pressure transmitters, RTD front-ends, strain gauges - is a primary application for the ADS8370IRHPR. The 16-bit no-missing-codes resolution translates directly into parts-per-million measurement repeatability, while the 600-kSPS throughput supports multiple temperature-compensated channels when scanned behind a low-leakage multiplexer. The internal reference option can be overdriven by an external 2.5V reference for ratiometric measurement against bridge excitation, eliminating gain drift as a dominant error source. Industrial control cabinets benefit from the -40C to +85C industrial temperature rating, the small 28-QFN footprint, and the tape-and-reel packaging designed for high-volume SMT production lines.
おすすめ
Medical Instrumentation Front-End
Medical instrumentation such as patient monitors, blood-pressure modules, and infusion-pump sensor read-outs benefits from the ADS8370IRHPR's micropower consumption, 16-bit resolution, and deterministic SAR latency. The capacitor-based SAR input draws negligible current between samples, easing the analog front-end bias design for ECG or temperature channels. The serial interface is easy to galvanically isolate using a low-cost digital isolator (e.g., ISO7741) because only four signals need crossing the barrier. Designers should size the input RC anti-alias filter to a bandwidth just above the highest signal of interest to keep aperture-jitter noise below the converter's LSB; for ECG the bandwidth is typically 150 Hz, allowing a relaxed RC constant and excellent rejection of mains-coupled interference.
おすすめ
Optical Encoder and Motor-Control Position Feedback
Optical-encoder read-out and motor-control position feedback are natural fits for the ADS8370IRHPR at 600 kSPS sample rate. Its SAR architecture provides single-cycle conversion latency, which is critical for closed-loop Field-Oriented Control (FOC) on brushless DC and servo motors where timing skew between current and rotor-position samples would cause torque ripple. Many resolver-to-digital designs use a separate excitation source (often a TI UCC28911-class driver) feeding a sine/cosine pair into two ADCs of this family for high-precision angle estimation. The 28-QFN 6x6 mm footprint keeps the analog island small, critical for compact motor-control PCBs that must also host gate drivers and current-sense amplifiers.
おすすめ
Audio-Bandwidth Spectrum Analyzer ADC
The ADS8370IRHPR's 600-kSPS rate places it squarely in the audio-bandwidth plus headroom territory, where it can digitize signals up to ~250 kHz and feed an on-board FFT for spectrum analysis, vibration monitoring, or acoustic-emission testing. Its 16-bit dynamic range, combined with the pseudo-differential input that attenuates common-mode hum, makes it appropriate for vibration sensors and microphone-array conditioning chains. The serial interface can stream real-time FFT frames into a microcontroller or DSP running FFT firmware without bus bandwidth contention. For best results, pair the ADC with an ultra-low-noise LDO such as the TPS7A4701 and a low-jitter SCLK source to keep aperture-jitter artifacts out of the analyzed spectrum.
おすすめ
Battery-Cell Monitoring and Stack Sensing
Battery-stack monitoring in telecom, UPS, and e-mobility uses the ADS8370IRHPR to digitize individual cell voltages with 16-bit resolution for state-of-charge and state-of-health estimation. The device's micropower consumption between conversions suits sleep-mode-orchestrated battery monitors, and its pseudo-differential input tolerates ground-bounce common-mode shift in long battery-stack harnesses. The serial output reduces opto-isolator channel count by sharing SCLK/DOUT across multiple stacked ADCs through daisy-chain-friendly CMOS I/O. For multi-cell stacks, choose an external reference matched to the maximum cell voltage (e.g., 2.5V REF193 for Li-ion) rather than using the internal reference, and verify the cumulative absolute accuracy budget across the full cell-voltage range.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADS8370IRHPR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADS8370IRHPT | ADS8370IRHPTG4 | ADS8370IRHPRG4 | ADS8370IRHP |
|---|---|---|---|---|---|
| Brand | 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 | 28-QFN (RHP) 6x6 mm - same |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Sample Rate | 600 kSPS | 600 kSPS | 600 kSPS | 600 kSPS | 600 kSPS |
| Architecture | SAR (1 channel) | SAR (1 channel) | SAR (1 channel) | SAR (1 channel) | SAR (1 channel) |
| DNL (typical) | ±0.5 LSB | ±0.5 LSB | ±0.5 LSB | ±0.5 LSB | ±0.5 LSB |
| SCLK Max | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Reel Packaging | Tape & Reel (R suffix) | Small Reel (T suffix) | Tape & Reel + G4 finish | Tape & Reel + G4 finish | TR (no extra suffix) |
| Lead-Free Finish | Yes | Yes | Yes (G4) | Yes (G4) | Yes |
主な差別化要因
- Single-channel precision in a compact 28-QFN 6x6 mm package （vs ADS8332IRGER)
- SAR vs delta-sigma trade-off - deterministic single-cycle latency （vs ADS1110A6IDBVR)
- Industrial -40C to +85C vs extended commercial temperature range （vs ADS7822PG4)
設計ノート
Decouple AVDD with a 10uF ceramic plus 0.1uF NPO/C0G capacitor pair placed within 5 mm of the AVDD pin, and DVDD with a separate 10uF + 0.1uF pair. SAR accuracy is extremely sensitive to high-frequency supply modulation, so a low-noise LDO (e.g., TPS7A4701 or TPS7A4901) is recommended ahead of AVDD. Sharing the analog and digital grounds creates spurious errors; split the ground plane and stitch them under the exposed pad. Estimated: at 600 kSPS and a typical 2.7V AVDD supply, power dissipation stays in the tens of milliwatts, so the exposed pad's thermal pad plus sufficient ground copper is adequate without a heatsink.
Do not float the AIN- input - it must be tied to a clean analog ground within a few centimeters of the ADC. SCLK must be clean; route it short and keep it away from DOUT switching edges to avoid feedback into the analog input. The CNVST signal must reach a stable logic-low for at least 20 ns before SCLK is asserted, or the conversion start can be missed. The BUSY signal should be polled rather than blind-clocked to avoid FIFO overruns at high sample rates.
Keep the analog-input trace short and guarded, and place an RC anti-alias filter (typically 100Ω + 1nF for 600 kSPS) within 5 mm of the AIN+ pin. Use a separate analog and digital ground plane stitched together only at the exposed thermal pad (EP). The REFIO/REFM reference traces must not run parallel to switching digital lines - keep them short and on the inner layer with a clean analog ground below. Avoid placing the ADC near a switching regulator to prevent coupling from switching edges into the SAR comparator.
Aperture jitter on the SCLK or the analog input can degrade SNR of a 16-bit ADC noticeably. Use a low-jitter clock source (crystal oscillator rather than DSP-generated PWM) and keep analog input edge rates below the -3 dB bandwidth of the input RC anti-alias filter. Estimated: at full input bandwidth, the SNR typically limits near the 16-bit theoretical envelope but each nanosecond of jitter reduces SNR by approximately 1 dB on the upper harmonics.
コンプライアンス情報
RoHS compliant and lead-free per TI product page. Not AEC-Q100 qualified - ADS8370IRHPR is intended for industrial/medical designs rather than automotive.
