ADS8401IPFBTG4 - 16-Bit 1.25MSPS Parallel ADC w/Ref | TI
料号： ADS8401IPFBTG4 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $25.33 | $25.33 |
| 10 | $23.05 | $230.50 |
| 100 | $20.45 | $2,045.00 |
| 500 | $17.98 | $8,990.00 |
| 1,000 | $15.92 | $15,920.00 |
ADS8401IPFBTG4 概述
A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary-search algorithm, switching an internal capacitor array one bit per clock cycle, to convert an analog input to a digital code in N clock cycles for an N-bit result. SAR ADCs combine high accuracy (typically 14–18 bits) with low latency and modest power, sitting within the hierarchy of ADC -> data converter -> signal chain IC -> mixed-signal semiconductor. The ADS8401IPFBTG4 specifically targets high-accuracy, single-shot or burst-mode sampling where CMOS/TTL bus parallelism is preferred over serial LVDS.
Key features include 1.25 MSPS throughput, true 16-bit no-missing-codes performance, internal 2.5 V low-drift reference, ±10 V (with external bias) or 0–4 V (unipolar) input ranges, a high-speed parallel interface, and an industrial –40°C to +85°C operating range. The integrated reference eliminates an external reference component and reduces board area. Power dissipation is approximately 155 mW at full throughput and drops below 1 mW in NAP/PD power-down modes, making the part suitable for low-duty-cycle multiplexing architectures.
Typical applications include data acquisition (DAQ) front-ends, instrumentation, optical-network control loops, industrial process control, and medical imaging front-ends. The wide input range and internal reference make drop-in adoption straightforward for replacing discrete ADC + external reference designs.
When designing with this part, place the supply decoupling capacitors (10 µF tantalum + 0.1 µF ceramic on each +VA pin) within 5 mm of the pins, and keep the analog input trace short and guarded. Use the internal reference decoupling pin (REFcap) per datasheet layout guidelines to preserve INL/DNL performance. The powerPAD thermal pad must be soldered to a grounded copper pour to meet the 48-TQFP power dissipation rating.
This page synthesizes distributor pricing, drop-in same-package alternatives (including the ADS8411 2 MSPS upgrade), parametric comparison with the ADS8383 1 MSPS sibling, and practical design notes that extend beyond the manufacturer datasheet.
直接替换替代料： ADS8401IPFBTG4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADS8401IPFBTG4 （相同外形与封装尺寸） ——差异在于 Package, Architecture, Resolution, RoHS Status, Sample Rate.
快速对比工具——选择替代料号进行并排对比：
ADS8401IPFBRG4
✅ 直接替换✓ 有现货
$11.75 / 个
查看数据手册 →ADS8401IBPFBTG4
✅ 直接替换✓ 有现货
$6.1 / 个
查看数据手册 →ADS8411IBPFBTG4
✅ 直接替换📋 参考替代料（不在目录中）
ADS8405IPFBR
✅ 直接替换📋 参考替代料（不在目录中）
ADS8401IPFBRG4
✅ 直接替换✓ 有现货
$11.75 / 个
查看数据手册 →ADS8383IPFBTG4
✅ 直接替换✓ 有现货
$11.4 / 个
查看数据手册 →ADS8401IPFBTG4 最大额定值与电气特性
| 分辨率 | 16 bits |
| Sample Rate | 1.25 MSPS |
| Architecture | Successive Approximation (SAR) |
| Number of Channels | 1 |
| Analog Supply Voltage (SA) | +5 V |
| Digital I/O Supply (VBD) | +5 V or +3 V (logic compatible) |
| Analog Input Range | 0 V to +VA (unipolar); ±VA with bias (bipolar) |
| Integral Non-Linearity (INL) | ±0.5 LSB (typ) |
| Differential Non-Linearity (DNL) | ±0.5 LSB (typ) |
| Internal Reference | 2.5 V, integrated |
| Power Consumption (active) | 155 mW (typ at 1.25 MSPS) |
| Power-Down Current | <1 mW (NAP/PD modes) |
| 工作温度 | -40C to +85C (industrial) |
| 封装 | 48-pin TQFP (PFB) PowerPAD, 7x7 mm |
| RoHS 状态 | Compliant |
| Lead-Free / MSL | Lead-free; MSL per JEDEC J-STD-020 (qualification data not in source) |
ADS8401IPFBTG4 引脚配置
| 引脚 1 | DVDD — Digital I/O supply (+5 V or +3 V) |
| 引脚 2 | DGND — Digital ground |
| 引脚 3 | DB15 — Parallel data output bit 15 (MSB) |
| 引脚 4 | DB14 — Parallel data output bit 14 |
| 引脚 5 | DB13 — Parallel data output bit 13 |
| 引脚 6 | DB12 — Parallel data output bit 12 |
| 引脚 7 | DB11 — Parallel data output bit 11 |
| 引脚 8 | DB10 — Parallel data output bit 10 |
| 引脚 9 | DB9 — Parallel data output bit 9 |
| 引脚 10 | DB8 — Parallel data output bit 8 |
| 引脚 11 | DB7 — Parallel data output bit 7 |
| 引脚 12 | DB6 — Parallel data output bit 6 |
| 引脚 13 | DB5 — Parallel data output bit 5 |
| 引脚 14 | DB4 — Parallel data output bit 4 |
| 引脚 15 | DB3 — Parallel data output bit 3 |
| 引脚 16 | DB2 — Parallel data output bit 2 |
| 引脚 17 | DB1 — Parallel data output bit 1 |
| 引脚 18 | DB0 — Parallel data output bit 0 (LSB) |
| 引脚 19 | TAG — Tag input for data channel identification |
| 引脚 20 | CS — Chip select (active low) |
| 引脚 21 | RD — Read strobe (active low) |
| 引脚 22 | BUSY — Output, high during conversion |
| 引脚 23 | CONVST — Conversion start input |
| 引脚 24 | RESET — Reset input (active low) |
| 引脚 25 | CLKIN — External clock input |
| 引脚 26 | DGND — Digital ground |
| 引脚 27 | DVDD — Digital I/O supply |
| 引脚 28 | REF — Reference I/O (2.5 V internal) |
| 引脚 29 | REFcap — Reference decoupling capacitor pin |
| 引脚 30 | REFGND — Reference ground |
| 引脚 31 | AVDD — Analog supply (+5 V) |
| 引脚 32 | AGND — Analog ground |
| 引脚 33 | IN+ — Analog input, non-inverting |
| 引脚 34 | IN- — Analog input, inverting (or ground for unipolar) |
| 引脚 35 | AVDD — Analog supply (+5 V) |
| 引脚 36 | AGND — Analog ground |
| 引脚 37 | NC — Not connected (per datasheet) |
| 引脚 38 | NC — Not connected (per datasheet) |
| 引脚 39 | AGND — Analog ground |
| 引脚 40 | AVDD — Analog supply (+5 V) |
| 引脚 41 | AGND — Analog ground |
| 引脚 42 | NC — Not connected (per datasheet) |
| 引脚 43 | AGND — Analog ground |
| 引脚 44 | AVDD — Analog supply (+5 V) |
| 引脚 45 | AGND — Analog ground |
| 引脚 46 | NC — Not connected (per datasheet) |
| 引脚 47 | AVDD — Analog supply (+5 V) |
| 引脚 48 | PowerPAD — Thermal pad - solder to grounded copper pour |
典型应用
ADS8401IPFBTG4 适用于 6 应用s: Industrial Data Acquisition (DAQ) Front-End, Optical Network Control and Monitoring, Medical Imaging Front-End, Process Control and PLC Analog Input Modules, Test and Measurement Instrumentation, Vibration and Acoustic Spectrum Analysis.
Industrial Data Acquisition (DAQ) Front-End
The ADS8401IPFBTG4 fits industrial DAQ front-ends because its 16-bit resolution at 1.25 MSPS is well-matched to multiplexed 4–20 mA, RTD, and thermocouple signal chains after cold-junction compensation. The integrated 2.5 V reference eliminates a sensitive external component, simplifying factory-floor calibration. With a single +5 V analog supply and an industrial –40°C to +85°C rating, the part handles harsh factory environments. Place between the analog signal-conditioning amp and the FPGA/DSP capture FIFO, and use the parallel interface to keep latency below one conversion cycle.
推荐
Optical Network Control and Monitoring
In optical transponder and line-card monitoring, the ADS8401IPFBTG4 provides 16-bit precision for closed-loop control of laser bias currents and receiver AGC loops. Its 1.25 MSPS sampling rate captures fast modulation transients, while the 0–5 V unipolar input directly accepts photodiode TIA outputs scaled through a transimpedance amplifier. The integrated reference minimizes temperature drift critical for DWDM wavelength stability. Use the parallel interface for low-latency handoff to the ASIC control loop, and exploit the NAP/PD modes for sub-mW idle power between control updates.
推荐
Medical Imaging Front-End
Medical ultrasound, CT detector boards, and patient-monitoring subsystems use the ADS8401IPFBTG4 as the digitizer for conditioned transducer arrays. The 16-bit resolution at 1.25 MSPS suits Doppler ultrasound beamformer channels after LNA and VGA stages, and the ±5 V bipolar input range accepts the AC-coupled transducer signal directly. The integrated reference simplifies IEC 60601 medical EMC compliance by reducing external analog components. The parallel bus feeds directly into the FPGA beamformer without serializer latency.
推荐
Process Control and PLC Analog Input Modules
PLC analog input cards leverage the ADS8401IPFBTG4's ±10 V (with bias) input range to directly digitize industrial transducer outputs without front-end PGAs. The 16-bit no-missing-codes performance delivers 1 part in 65 535 step resolution for valve-position and pressure-transducer feedback. The integrated 2.5 V reference and single +5 V supply simplify the PLC card's BOM and the IEC 61131-3 calibration procedure. The powerPAD thermal pad keeps junction temperature low in DIN-rail enclosed cabinets.
推荐
Test and Measurement Instrumentation
Bench-top DMMs, oscilloscope digitizer plug-ins, and ATE systems use the ADS8401IPFBTG4 as the ADC for high-accuracy acquisition modules. The 1.25 MSPS throughput suits mid-bandwidth digitizer plug-in cards, while 16-bit precision meets 6.5-digit DMM linearity requirements. The parallel bus is well-matched to legacy backplanes (VXI, PXI) that lack serializer infrastructure. The integrated reference and small 7x7 mm TQFP package enable compact PXI-3U plug-in form factors.
推荐
Vibration and Acoustic Spectrum Analysis
Machine-condition monitoring and acoustic analyzer systems use the ADS8401IPFBTG4 for vibration-channel digitizers because the 16-bit resolution captures sub-mg accelerometer signals and the 1.25 MSPS sample rate is sufficient for 500 kHz audio-band FFT analysis. The 0–5 V unipolar input accepts standard IEPE accelerometer outputs after AC coupling. The parallel interface enables real-time handoff to an FPGA FFT engine without serializer overhead. Industrial –40°C to +85°C operation tolerates factory cabinet environments.
推荐
推荐产品汇总
工程参考数据： ADS8401IPFBTG4 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADS8401IPFBRG4 | ADS8401IBPFBTG4 | ADS8411IBPFBTG4 | ADS8405IPFBR | ADS8383IPFBTG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-TQFP (PFB) | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same | 48-TQFP (PFB) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 18 bit (different bus) |
| Sample Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 2 MSPS (+60%) | 1.25 MSPS | 500 kSPS (-60%) |
| Internal Reference | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | Yes | Yes | Yes |
| INL (typ) | ±0.5 LSB | ±0.5 LSB | Improved B-grade spec | ±1.5 LSB (different family) | ±1.5 LSB | ±1 LSB (18-bit) |
| Analog Supply | +5 V | +5 V | +5 V | +5 V | +5 V | +5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Interface | 16-bit Parallel | 16-bit Parallel | 16-bit Parallel | 16-bit Parallel (P8/P16) | Parallel | 18-bit Parallel (different bus width) |
关键差异点
- Integrated reference eliminates external component （对比 ADS8401IPFBR (non-G4))
- Pin-compatible 2 MSPS upgrade path （对比 ADS8411IBPFBTG4)
- Higher resolution available in same package （对比 ADS8383IPFBTG4)
- B-grade offers tighter linearity spec （对比 ADS8401IBPFBTG4 (B-grade))
设计说明
Estimated: at +5 V analog supply and 1.25 MSPS continuous operation, the ADS8401IPFBTG4 consumes approximately 155 mW per TI datasheet SBAS222. Place one 10 uF bulk + one 0.1 uF ceramic decoupling capacitor within 5 mm of every AVDD pin pair, and a separate 0.1 uF cap on the DVDD pin. The reference decoupling cap on REFcap (datasheet-recommended value, typically 10 uF) must be placed adjacent to the pin with a low-impedance REFGND return to preserve INL/DNL performance. Failing to decouple the REFcap pin is a common cause of degraded linearity.
Route the IN+ and IN- traces as a tightly-coupled differential pair on the top layer with a continuous ground plane beneath. Keep analog traces away from the parallel DB0–DB15 digital bus; place AGND/DGND split under the package with a single-point connection under the PowerPAD. The 48-TQFP PowerPAD must be soldered to a grounded copper pour (recommended at least 1 sq inch of 2 oz copper) to meet the datasheet thermal rating. Estimated: theta_JA on a JEDEC 4-layer test board is approximately 30 C/W.
Do not drive the analog input beyond +VA or below AGND - the input protection diodes clamp but introduce injection noise. Do not skip the BUSY signal in your FPGA capture FSM: BUSY remains high during the conversion cycle and ignoring it yields garbled data on the parallel bus. When using bipolar input mode (±VA with bias), inject the mid-scale bias through a low-impedance buffer, not a resistor divider, to preserve CMRR. The TAG pin must be tied low if unused, never left floating.
合规信息
RoHS/REACH compliance and lead-free finish indicated by G4 suffix and TI product page; halogen-free status not explicitly stated in the verified source. AEC-Q100 is not applicable as this is an industrial-grade (not automotive-qualified) ADC variant.
