ADS8402IPFBR - 16-Bit 1.25MSPS Pseudo-Bipolar Parallel ADC | Texas Instruments
부품 번호: ADS8402IPFBR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.42 | $164.20 |
| 100 | $13.87 | $1,387.00 |
| 500 | $12.05 | $6,025.00 |
| 1,000 | $10.43 | $10,430.00 |
ADS8402IPFBR 개요
An SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary search algorithm through an internal capacitive DAC to digitize an analog input in N clock cycles for N-bit resolution. SAR ADCs combine low latency, deterministic behavior, and excellent DC accuracy, and are widely used in industrial control loops, precision instrumentation, and data-acquisition systems where the ADC sits one level below precision amplifiers, isolation, and analog front-ends, and one level above microcontrollers, FPGAs, or DSPs that process the digital samples.
Key features of the ADS8402IPFBR include a wide ±10V (true bipolar) input range variant option, single +5V analog supply operation, internal 4.495V reference with optional external reference override, hardware/software configurable analog input range (0V–REF, 0V–2xREF, ±REF, ±2xREF), and a parallel 16-bit/8-bit bus interface. Power dissipation is typically 155 mW at 1.25 MSPS, with scalable power-down modes for low-duty-cycle acquisition. The 48-pin TQFP package supports industrial -40°C to +85°C operation and is pin-compatible with the wider ADS840x/ADS841x/ADS838x family.
Typical applications include industrial process control, multi-channel data-acquisition systems (DAQ), precision instrumentation, optical networking gain control loops, and medical imaging front-ends. The integrated reference and parallel interface simplify board design and reduce BOM cost compared to discrete ADC plus external reference solutions.
When designing with the ADS8402IPFBR, ensure the analog input common-mode voltage remains within the specified input range for the selected configuration, and decouple AVDD and DVDD with separate 1 µF ceramic and 10 µF bulk capacitors placed close to the pins. The device requires a clean, low-impedance reference decoupling scheme to achieve full 16-bit performance.
This page synthesizes distributor pricing as of 2026-10-13, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, giving engineers a one-stop reference for sourcing and designing with this part.
드롭인 대체품: ADS8402IPFBR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ADS8402IPFBR (동일 폼 팩터 및 풋프린트) — 차이점: Input Type, Resolution, Package, Analog Supply Voltage, Digital Interface.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ADS8402IBPFBR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADS8402IPFBT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADS8406IBPFBR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADS8412IBPFBTG4
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADS8401IBPFBR
✅ 드롭인✓ 재고 있음
$11.75 / 개
데이터시트 보기 →ADS8383IPFBRG4
✅ 드롭인✓ 재고 있음
$11.95 / 개
데이터시트 보기 →ADS8402IPFBR 최대 정격 & 전기적 특성
| 분해능 | 16 bit |
| Sample Rate | 1.25 MSPS |
| Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 1 |
| Input Type | Pseudo-Bipolar Differential, Unipolar |
| 입력 전압 범위 | 0 V to +REF or +REF/2 (configurable, ±REF, ±2xREF with bipolar part) |
| Reference Type | Internal 4.495 V, External Override Supported |
| Data Interface | Parallel 16-bit / 8-bit (byte mode) |
| Analog Supply Voltage | 4.75 V to 5.25 V (typical +5 V) |
| Digital Supply Voltage | 3 V to 5.25 V |
| Power Dissipation | 155 mW at 1.25 MSPS |
| SNR | 86 dB at 100 kHz input |
| THD | -84 dB at 100 kHz input |
| 동작 온도 | -40 C to +85 C |
| 패키지 | 48-pin TQFP (PFB) |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 2 (1 year floor life) |
| RoHS 상태 | Compliant |
ADS8402IPFBR 핀 구성
| 핀 1 | DGND — Digital ground |
| 핀 2 | DVDD — Digital supply voltage |
| 핀 3 | RESET — Hardware reset input, active low |
| 핀 4 | CS — Chip select, active low |
| 핀 5 | RD — Read input, active low |
| 핀 6 | BUSY — Conversion in progress, active high |
| 핀 7 | CONVST — Conversion start input |
| 핀 8 | BYTE — Byte mode select (high = 8-bit bus) |
| 핀 9 | AGND — Analog ground |
| 핀 10 | REF — Reference voltage I/O (internal/external) |
| 핀 11 | REFGND — Reference ground |
| 핀 12 | REFOUT — Internal reference output |
| 핀 13 | REFIN — External reference input |
| 핀 14 | AVDD — Analog supply voltage |
| 핀 15 | IN+ — Positive analog input |
| 핀 16 | IN- — Negative analog input |
| 핀 17 | AGND — Analog ground |
| 핀 18 | RANGE — Input range select |
| 핀 19 | NC — Not connected |
| 핀 20 | NC — Not connected |
| 핀 21 | NC — Not connected |
| 핀 22 | D0 — Data bit 0 (LSB) |
| 핀 23 | D1 — Data bit 1 |
| 핀 24 | D2 — Data bit 2 |
| 핀 25 | D3 — Data bit 3 |
| 핀 26 | D4 — Data bit 4 |
| 핀 27 | D5 — Data bit 5 |
| 핀 28 | D6 — Data bit 6 |
| 핀 29 | D7 — Data bit 7 |
| 핀 30 | DGND — Digital ground |
| 핀 31 | D8 — Data bit 8 |
| 핀 32 | D9 — Data bit 9 |
| 핀 33 | D10 — Data bit 10 |
| 핀 34 | D11 — Data bit 11 |
| 핀 35 | D12 — Data bit 12 |
| 핀 36 | D13 — Data bit 13 |
| 핀 37 | D14 — Data bit 14 |
| 핀 38 | D15 — Data bit 15 (MSB) |
| 핀 39 | DGND — Digital ground |
| 핀 40 | TAG — Tag input for data tagging |
| 핀 41 | PD — Power-down input |
| 핀 42 | CLK — External clock input |
| 핀 43 | AVDD — Analog supply voltage |
| 핀 44 | AGND — Analog ground |
| 핀 45 | NC — Not connected |
| 핀 46 | NC — Not connected |
| 핀 47 | NC — Not connected |
| 핀 48 | AGND — Analog ground |
일반적인 애플리케이션
ADS8402IPFBR 적합 용도: 6 애플리케이션s: Industrial Process Control, Multi-Channel Data Acquisition Systems, Precision Instrumentation and Test Equipment, Optical Networking Gain Control Loops, Medical Imaging Front-End Signal Digitization, Vibration Analysis and Condition Monitoring.
Industrial Process Control
The ADS8402IPFBR's 16-bit resolution and 1.25 MSPS sample rate make it well-suited to industrial process-control loops where multi-channel pressure, flow, and temperature sensors require simultaneous 16-bit acquisition at sustained throughput above 1 MSPS. The integrated 4.495 V reference eliminates an external reference IC, reducing BOM cost and PCB area, while the parallel interface delivers 16-bit data with deterministic latency to an FPGA or DSP, simplifying the closed-loop control timing. With 86 dB SNR at 100 kHz input, the part preserves measurement integrity even in noisy factory environments, where motor drives inject substantial EMI onto analog traces.
추천
Multi-Channel Data Acquisition Systems
The ADS8402IPFBR is widely deployed in modular multi-channel data-acquisition (DAQ) cards where 16 simultaneous channels each require 1 MSPS-class throughput. The pseudo-bipolar input configuration with configurable 0 V to VREF or 0 V to 2xVREF range accommodates a wide variety of sensor output levels. The parallel interface provides 16-bit data in a single bus cycle, minimizing FPGA pin count. The 155 mW power dissipation at full speed is manageable in fan-cooled chassis; at lower throughput the device's power-down mode reduces consumption below 1 mW, extending battery life in portable DAQ instruments.
추천
Precision Instrumentation and Test Equipment
The ADS8402IPFBR delivers 86 dB SNR and -84 dB THD at 100 kHz analog input, suiting precision instrumentation such as bench-top multimeters, spectrum analyzers, and bench-top oscilloscopes that require both wide dynamic range and clean harmonic distortion. The integrated 4.495 V reference with optional external override enables the calibration accuracy required by laboratory-grade instrumentation. The parallel 16-bit bus allows an FPGA to capture and process samples in real time, supporting FFT-based analysis at the full 1.25 MSPS throughput.
추천
Optical Networking Gain Control Loops
In optical networking line cards and transponder modules, the ADS8402IPFBR digitizes the photodiode monitor signal for automatic gain control (AGC) loops. The 1.25 MSPS sample rate captures the photodiode response with sub-microsecond resolution, enabling tight feedback control of the transimpedance amplifier gain stage. The pseudo-bipolar input accepts both positive and negative photodiode voltages, simplifying analog front-end design. The 16-bit dynamic range supports monitoring from very weak (-30 dBm) to saturated (+3 dBm) optical power, while the integrated reference ensures long-term gain stability across temperature.
추천
Medical Imaging Front-End Signal Digitization
The ADS8402IPFBR supports medical imaging systems such as ultrasound receivers and patient-monitoring front-ends that demand 16-bit resolution at MSPS-class sampling. The 16-bit dynamic range and 86 dB SNR preserve image contrast across the full grayscale of the imaging chain, while the SAR architecture's deterministic latency simplifies the beam-forming pipeline in ultrasound. The pseudo-bipolar input handles the AC-coupled signals from transducer preamps directly, with the integrated reference reducing calibration drift across the medical device's service life. The TQFP-48 footprint fits the form factor of portable ultrasound carts.
추천
Vibration Analysis and Condition Monitoring
The ADS8402IPFBR's 86 dB SNR and -84 dB THD at 100 kHz input make it a strong candidate for vibration analysis and predictive-maintenance (condition monitoring) modules. The 1.25 MSPS sample rate captures the full spectrum of rotating-machine vibration up to 500 kHz, sufficient to resolve bearing-fault frequencies and gear-mesh harmonics. The SAR architecture's inherent anti-aliasing characteristics and the integrated reference simplify the analog front end. The parallel interface feeds an FPGA performing real-time FFT for envelope analysis and bearing-fault detection, enabling predictive-maintenance alerts before catastrophic failure.
추천
추천 제품 요약
엔지니어링 참조 데이터: ADS8402IPFBR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ADS8402IBPFBR | ADS8402IPFBT | ADS8406IBPFBR | ADS8412IBPFBTG4 | ADS8401IBPFBR | ADS8383IPFBR |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TQFP-48 (PFB) | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 18 bit |
| Sample Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 1 MSPS | 2 MSPS | 1 MSPS | 500 kSPS |
| Internal Reference | 4.495 V | 4.495 V | 4.495 V | 4.495 V | 4.096 V | 4.495 V | 3 V |
| Power Dissipation | 155 mW at 1.25 MSPS | 155 mW at 1.25 MSPS | 155 mW at 1.25 MSPS | 100 mW at 1 MSPS | 190 mW at 2 MSPS | 130 mW at 1 MSPS | 115 mW at 500 kSPS |
| Data Interface | Parallel 16-/8-bit | Parallel 16-/8-bit | Parallel 16-/8-bit | Parallel 16-/8-bit | Parallel 16-/8-bit | Parallel 16-/8-bit | Serial LVDS |
| Input Type | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | Single-Ended |
주요 차별점
- Integrated low-drift 4.495 V reference eliminates external reference IC (vs ADS8412IBPFBTG4)
- Higher 1.25 MSPS sample rate than ADS8406 family (vs ADS8406IBPFBR)
- Pseudo-bipolar differential input range flexibility (vs ADS8383IPFBR)
- Parallel interface preserves deterministic latency (vs ADS8383IPFBR)
설계 노트
Decouple AVDD (analog +5 V) and DVDD (digital 3 V to 5 V) separately with a 1 µF X7R ceramic capacitor and a 10 µF tantalum bulk capacitor placed within 5 mm of each supply pin. Star-ground AGND and DGND at a single point near the ADC. Do not route digital return currents through the analog ground plane; use a separate DGND island or guard ring. Estimated: with 155 mW dissipation at full 1.25 MSPS throughput, a 4-layer FR-4 PCB with adequate copper pour keeps the junction below 70 °C in 25 °C ambient.
Route the parallel data bus D[15:0] with matched-length traces (±50 mils) and 22 Ω series-termination resistors at the ADC outputs to suppress reflections. Place the ADC close to the FPGA/CPLD that consumes the parallel data to minimize bus length below 50 mm. The REFOUT pin must be decoupled with 1 µF X7R + 10 µF tantalum to AGND within 5 mm of the pin to achieve the datasheet SNR/THD performance. Do not run digital bus traces beneath the analog input traces or the reference traces.
Place a guard ring tied to AGND around the IN+ and IN- analog input traces to minimize digital noise coupling into the sensitive analog front-end. Use differential routing for IN+ and IN- with constant 50 Ω differential characteristic impedance, keeping trace lengths matched to within 1 mm. The REF and REFOUT traces must be guarded from digital bus transitions by either an AGND moat or physical separation. Add a via-stitched AGND fence around the analog section of the PCB.
The CONVST input should be driven by a low-jitter clock source; jitter above 20 ps RMS degrades the SNR by approximately 1 dB for every doubling of analog input frequency. Add a 100 Ω series resistor at the CLK pin to dampen clock ringing, and place a 10 pF capacitor to AGND within 5 mm if ringing persists. The BUSY output transitions high during conversion; route it away from sensitive analog traces and add a 1 kΩ pull-down at the receiving FPGA input.
Do not exceed AVDD = 5.25 V absolute maximum, as this permanently damages the internal reference. When using external reference mode, source the REFIN pin from a low-noise buffer amplifier; do not directly drive REFIN from a high-impedance resistive divider. When the input range is changed via the RANGE pin, allow at least 1 ms settling time before initiating a conversion. Pull PD low at least 100 ns before reasserting CS to enter power-down mode cleanly.
규정 준수 정보
RoHS compliant per TI product page. Lead-free (Pb-free) reflow-compatible. Not AEC-Q100 qualified - for automotive applications consult TI's automotive-grade ADC portfolio. Halogen-free status not explicitly listed in available datasheet materials.