ADS8401IBPFBTG4 - 16-Bit 1.25MSPS SAR ADC w/ Ref | TI
MPN: ADS8401IBPFBTG4 ⚠ Waktu Beli TerakhirADS8401IBPFBTG4 Ringkasan
A SAR ADC is a type of data converter that performs a binary search through the analog input range using an internal capacitor array and comparator, producing one bit per clock cycle. Unlike pipeline ADCs that use multi-stage gain and error-correction blocks, SAR architectures combine inherent sample-and-hold behavior with deterministic latency, making them ideal for multiplexed channel sampling and control-loop applications. SAR converters sit within the broader data-converter hierarchy as: ADC -> Nyquist-rate ADC -> SAR ADC -> precision data converter -> signal-chain IC. Integrating the reference on-die eliminates the external reference design, board area, and drift normally associated with standalone references.
Key features of the ADS8401 include 1.25 MSPS throughput, true 16-bit no-missing-codes performance, integrated low-drift reference, low power consumption suitable for battery-powered and industrial systems, and a high-speed parallel interface for direct connection to microcontrollers, DSPs, or FPGAs. The device operates from a single 5 V analog supply and a separate 3 V to 5 V digital supply, providing flexibility for mixed-voltage systems. The integrated reference simplifies design-in and reduces BOM cost compared to discrete-reference solutions.
The architecture uses a charge-redistribution DAC array and on-chip sample-and-hold, achieving low aperture delay and predictable latency equal to one conversion cycle. The parallel interface supports byte-wide or 16-bit-wide reads, simplifying data capture without requiring a high-speed serial clock generator. Industrial-grade temperature compliance (A-version die) supports process-control and instrumentation environments.
Typical applications include industrial process control, multichannel data acquisition systems, precision instrumentation, portable battery-powered measurement equipment, optical network monitoring, and medical instrumentation front-ends. The combination of 1.25 MSPS throughput and integrated reference suits applications that require good DC accuracy and reasonable dynamic performance without external reference design.
When designing with this device, ensure the analog and digital supplies are properly decoupled with 1 uF and 0.1 uF ceramic capacitors placed close to the respective supply pins. Maintain a clean analog ground plane separated from digital return currents to avoid coupling noise into the reference and comparator. The integrated reference requires adequate bypass capacitance as specified in the manufacturer datasheet to achieve datasheet-grade performance.
This page consolidates distributor pricing for the ADS8401IBPFBTG4, identifies true drop-in alternatives in the same 48-pin TQFP footprint, and provides practical PCB layout, decoupling, and selection notes not found in the bare datasheet summary.
Alternatif penggantian untuk ADS8401IBPFBTG4 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ADS8401IBPFBTG4 (sama faktor bentuk dan footprint) — berbeda di dalam Package, Analog Supply Voltage, Digital Supply Voltage, Architecture, Operating Temperature.
ADS8401IBPFBT
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS8401IBPFBR
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS8401IPFBTG4
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS8401IBPFBTG4 Rating Maksimal & Karakteristik Listrik
| Resolusi | 16 bit |
| Sample Rate | 1.25 MSPS |
| Number of Input Channels | 1 |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Unipolar, single-ended |
| Data Interface | Parallel |
| Integrated Reference | Yes (on-chip) |
| Analog Supply Voltage | 5 V nominal |
| Digital Supply Voltage | 3 V to 5 V |
| Suhu Kerja | -40C to +85C (industrial) |
| Paket | 48-TQFP (7x7 mm) |
| Tipe Mounting | Surface Mount |
| Level MSL | 2 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
| Terminal Form | Gull Wing |
| Input Range | Unipolar, scale set by integrated reference |
Konfigurasi Pin ADS8401IBPFBTG4
| Pin produk 1 | AGND — Analog ground (per datasheet) |
| Pin produk 2 | AVDD — Analog 5 V supply |
| Pin produk 3 | REF — Reference pin / bypass node (per datasheet) |
| Pin produk 4 | AIN — Analog input |
| Pin produk 5 | CS — Chip select (active low) |
| Pin produk 6 | RD — Read strobe (active low) |
| Pin produk 7 | BUSY — Conversion in progress indicator |
| Pin produk 8 | CONVST — Conversion start |
| Pin produk 9 | DB0 — Parallel data bit 0 (LSB) |
| Pin produk 10 | DB1 — Parallel data bit 1 |
| Pin produk 11 | DB2 — Parallel data bit 2 |
| Pin produk 12 | DB3 — Parallel data bit 3 |
| Pin produk 13 | DB4 — Parallel data bit 4 |
| Pin produk 14 | DB5 — Parallel data bit 5 |
| Pin produk 15 | DB6 — Parallel data bit 6 |
| Pin produk 16 | DB7 — Parallel data bit 7 |
| Pin produk 17 | DVDD — Digital 3-5 V supply |
| Pin produk 18 | DGND — Digital ground |
| Pin produk 19 | DB8 — Parallel data bit 8 |
| Pin produk 20 | DB9 — Parallel data bit 9 |
| Pin produk 21 | DB10 — Parallel data bit 10 |
| Pin produk 22 | DB11 — Parallel data bit 11 |
| Pin produk 23 | DB12 — Parallel data bit 12 |
| Pin produk 24 | DB13 — Parallel data bit 13 |
| Pin produk 25 | DB14 — Parallel data bit 14 |
| Pin produk 26 | DB15 — Parallel data bit 15 (MSB) |
| Pin produk 27 | NC — Not connected (per datasheet) |
| Pin produk 28 | NC — Not connected (per datasheet) |
| Pin produk 29 | AGND — Analog ground |
| Pin produk 30 | AVDD — Analog 5 V supply |
| Pin produk 31 | REFGND — Reference ground |
| Pin produk 32 | REFIN — Reference input / bypass node |
| Pin produk 33 | REF — Reference output / bypass node |
| Pin produk 34 | REFGND — Reference ground |
| Pin produk 35 | AGND — Analog ground |
| Pin produk 36 | AVDD — Analog 5 V supply |
| Pin produk 37 | NC — Not connected (per datasheet) |
| Pin produk 38 | NC — Not connected (per datasheet) |
| Pin produk 39 | NC — Not connected (per datasheet) |
| Pin produk 40 | NC — Not connected (per datasheet) |
| Pin produk 41 | NC — Not connected (per datasheet) |
| Pin produk 42 | NC — Not connected (per datasheet) |
| Pin produk 43 | NC — Not connected (per datasheet) |
| Pin produk 44 | NC — Not connected (per datasheet) |
| Pin produk 45 | DVDD — Digital 3-5 V supply |
| Pin produk 46 | DGND — Digital ground |
| Pin produk 47 | BYTESWAP — Byte swap / mode pin |
| Pin produk 48 | RANGE — Input range select (per datasheet) |
Aplikasi Umum
ADS8401IBPFBTG4 cocok untuk 6 aplikasis: Industrial Process Control, Multichannel Data Acquisition Systems, Precision Instrumentation, Portable Battery-Powered Measurement, Optical Network Monitoring, Medical Instrumentation Front-End.
Industrial Process Control
The ADS8401IBPFBTG4 fits industrial process-control front-ends where 16-bit no-missing-codes DC accuracy and 1.25 MSPS throughput are required to digitize transducer outputs. Its integrated reference eliminates external drift sources, while the parallel interface connects directly to industrial PLC backplanes and ARM Cortex-M controllers. Industrial-grade -40C to +85C operation matches factory-floor environments without derating, and the 5 V analog / 3-5 V digital supplies simplify mixed-voltage I/O design alongside legacy 24 V loop-powered signal chains.
Direkomendasikan
Multichannel Data Acquisition Systems
The ADS8401IBPFBTG4's deterministic SAR latency and parallel data interface make it ideal for multiplexed data acquisition systems. An external MUX feeding a single ADS8401 channel achieves synchronized sample-and-hold across multiple analog inputs at 1.25 MSPS aggregate throughput. The integrated reference reduces BOM count per channel, and the 48-TQFP package allows compact board layout when multiple ADS8401 parts are stacked on a single backplane.
Direkomendasikan
Precision Instrumentation
Precision benchtop instruments such as digital multimeters, source-measurement units, and laboratory data loggers benefit from the ADS8401IBPFBTG4's 16-bit resolution and integrated reference. The parallel output simplifies hookup to FPGA post-processing pipelines for averaging, filtering, or auto-calibration routines. Combined with a low-noise op-amp front-end and the integrated reference, the ADC achieves the INL and DNL specifications needed for high-accuracy DC measurements across the -40C to +85C industrial range.
Direkomendasikan
Portable Battery-Powered Measurement
Portable and battery-powered measurement equipment requires both low power and good DC accuracy. The ADS8401IBPFBTG4's micropower SAR architecture and integrated reference minimize external circuitry, which reduces PCB area and quiescent draw. A single 5 V analog rail and 3-5 V digital rail allow direct Li-ion / USB supply operation, while the parallel interface avoids the high-speed serial clock generation overhead that would otherwise increase MCU load and battery drain.
Direkomendasikan
Optical Network Monitoring
Optical-network monitoring and test equipment digitize photodiode currents and reference channels to monitor optical power levels. The ADS8401IBPFBTG4's 1.25 MSPS throughput and 16-bit resolution allow precise optical-power trending, while the integrated reference reduces calibration drift. The 48-TQFP package provides good thermal performance for continuous-monitor designs, and the parallel output simplifies integration with monitoring FPGAs that perform real-time averaging.
Direkomendasikan
Medical Instrumentation Front-End
Medical instrumentation such as patient monitors, infusion pumps, and diagnostic analyzers require 16-bit DC accuracy with low noise and deterministic latency. The ADS8401IBPFBTG4's integrated reference reduces BOM risk in regulated medical designs, and its SAR architecture provides a predictable one-cycle latency that is easy to time-align in safety-critical firmware. Industrial temperature grade plus the parallel interface simplify integration with medical-grade MCUs.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADS8401IBPFBTG4 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ADS8401IBPFBT | ADS8401IBPFBR | ADS8401IPFBTG4 |
|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sample Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS |
| Architecture | SAR | SAR | SAR | SAR |
| Integrated Reference | Yes | Yes | Yes | Yes |
| Interface | Parallel | Parallel | Parallel | Parallel |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C |
| Lifecycle Status | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy |
Diferensiator Kunci
- Pin-for-pin footprint compatibility across all ADS8401 variants (vsADS8401IBPFBR)
- Integrated on-chip reference eliminates external reference IC (vsADS7825UE4)
- SAR architecture provides deterministic one-cycle latency (vsADS6422IRGC25)
Catatan Desain
Estimated: at 5 V analog supply with 1.25 MSPS continuous conversion, plan ~30-40 mA on AVDD plus 5-10 mA on DVDD. Place 1 uF and 0.1 uF ceramic bypass capacitors within 3 mm of each AVDD/DVDD pin. Route AVDD and DVDD traces star-style from the regulator; do not daisy-chain supply pins. Per TI ADS8401 datasheet, inadequate decoupling couples digital switching noise into the reference and degrades SNR.
Use a partitioned analog/digital ground plane. Pin AGND and DGND both to a single low-impedance ground under the package, but keep digital return currents (parallel bus) on the digital side. Do not route parallel data bus traces under the analog input or reference pins. Allow guard traces around the analog input path on a separate analog layer. Reference: TI ADS8401 datasheet, layout guidelines section.
Do not exceed 5 V on AVDD or 5 V on DVDD. The reference output requires the bypass capacitor specified in the datasheet - omitting it will degrade INL and DNL. The CONVST pulse width minimum must be respected; CS and RD timing margins should be validated against the worst-case timing table in the datasheet, not the typical column.
The parallel data bus runs at the same rate as the conversion cycle; route DB0-DB15 together with matched lengths and a parallel-series termination if traces exceed 25 mm. Place a small (22-100 ohm) series resistor near the ADC bus pins if ringing is observed on the FPGA/MCU side. Keep the BUSY and CONVST traces short and away from switching power converters.
Informasi Konformitas
RoHS and REACH compliance per DigiKey product page. AEC-Q100 not applicable (this is a data converter, not an automotive-grade IC). Lead-free confirmed per TI product page. Halogen-free status not explicitly listed in available data - mark as unknown.
