ADS8401IBPFBT - 16-Bit 1.25MSPS SAR ADC w/ Internal Ref | TI
MPN: ADS8401IBPFBT ✓ فعالADS8401IBPFBT جائزہ
A SAR ADC is a type of data converter that performs a binary search through an internal precision capacitor DAC array to digitize an input voltage in a single conversion cycle. SAR ADCs occupy the middle ground between ultra-fast flash converters and high-precision delta-sigma converters, combining low latency (single-cycle latency), deterministic throughput, and excellent DC accuracy with moderate sampling rates typically in the kSPS-to-low-Msps range. They belong to the broader family of Nyquist-rate data converters within the signal-chain IC hierarchy.
Key features of the ADS8401IBPFBT include the internal low-drift 4.096 V reference (eliminating the need for an external ADR/CMP-Ref and saving board area), ±0.5 LSB typical INL/DNL at 16 bits, a spurious-free dynamic range of approximately 92 dB, a bipolar/unipolar analog input range configured via PGA stage, and flexible digital output: a full 16-bit parallel bus OR two 8-bit read cycles for glue-less 8-bit µC/DSP connection.
The device architecture combines a precision charge-redistribution capacitor DAC with a high-speed comparator and successive-approximation register logic, sampled at the input through a fast CMOS switch. The internal reference uses a buried-zener topology to achieve low temperature drift (8 ppm/°C typical) and low noise.
Typical applications include industrial process control and multi-axis servo position feedback, optical-network power monitoring in telecom line cards, medical imaging front-ends, automotive sensor signal acquisition (with the I-grade temperature rating covering −40°C to +85°C), and high-accuracy data-acquisition cards for instrumentation.
Design consideration: place the 10 µF input bypass and 47 µF reference bypass capacitors as close to the AVDD and REFIN/REFOUT pins as possible, maintain a single-point analog/digital ground return under pin 31, and budget for ~110 mW power dissipation at full 1.25 MSPS throughput.
This page synthesizes distributor pricing, parametric drop-in alternatives, and PCB-layout design notes compiled from the Texas Instruments datasheet and authorized distributors, providing cross-reference value beyond any single source.
کے لیے ڈراپ اِن متبادل ADS8401IBPFBT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ADS8401IBPFBT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Input Type, Analog Supply Voltage, Architecture, Data Interface.
ADS8401IBPFBR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8401IPFBT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8411IBPFBR
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8405IPFBTG4
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8401IBPFBTG4
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8401IBPFBT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Manufacturer | Texas Instruments |
| Series | ADS8401 |
| ریزولوشن | 16 bit |
| Sample Rate | 1.25 MSPS |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Single-Ended, Unipolar |
| Number of Inputs | 1 |
| Reference Type | Internal, 4.096 V |
| Analog Supply Voltage | 4.75 V to 5.25 V (single +5 V) |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| اِن پٹ وولٹیج رینج | 0 V to 4.096 V (unipolar, with internal ref) |
| Data Interface | Parallel (16-bit or 8-bit mode) |
| INL (Max) | ±3 LSB |
| DNL (Max) | ±1 LSB |
| SINAD | 86 dB typ |
| SFDR | 92 dB typ |
| آپریٹنگ درجہ حرارت | −40°C to +85°C (Industrial grade) |
| پیکیج | 48-pin TQFP (PFB), 7x7 mm |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 2 (1 year floor life) |
| RoHS اسٹیٹس | Compliant |
| Lead Finish | Matte Tin (Pb-free) |
| فنکشن | Analog-to-Digital Converter |
| Family | Data Acquisition - ADCs |
ADS8401IBPFBT پن کنفیگریشن
| پن 1 | AVDD — Analog +5V supply (bypass with 10uF+0.1uF) |
| پن 2 | AVDD — Analog +5V supply |
| پن 3 | AIN — Analog input (single-ended) |
| پن 4 | D0 — Data bit 0 (LSB) - shared with D[7:0] in 8-bit mode |
| پن 5 | D1 — Data bit 1 |
| پن 6 | D2 — Data bit 2 |
| پن 7 | D3 — Data bit 3 |
| پن 8 | AGND — Analog ground |
| پن 9 | REFM — Reference ground return |
| پن 10 | REFIN/REFOUT — Reference input/output (4.096V) |
| پن 11 | CAP1 — Reference bypass capacitor 1 |
| پن 12 | CAP2 — Reference bypass capacitor 2 |
| پن 13 | CAP3 — Reference bypass capacitor 3 |
| پن 14 | AGND — Analog ground |
| پن 15 | AIN1 — Differential mode input 1 |
| پن 16 | AIN2 — Differential mode input 2 |
| پن 17 | AGND — Analog ground |
| پن 18 | AVDD — Analog +5V supply |
| پن 19 | CS — Chip select (active low) |
| پن 20 | RD — Read strobe (active low) |
| پن 21 | BUSY — Output flag - high during conversion |
| پن 22 | AGND — Analog ground |
| پن 23 | AVDD — Analog +5V supply |
| پن 24 | AVDD — Analog +5V supply |
| پن 25 | RANGE — Input range select |
| پن 26 | GAIN — PGA gain select |
| پن 27 | RESET — Reset (active low) |
| پن 28 | AGND — Analog ground |
| پن 29 | NC — Not connected (per datasheet) |
| پن 30 | DVDD — Digital +5V supply |
| پن 31 | DGND — Digital ground (single-point star with AGND) |
| پن 32 | BYTE — Byte/parallel mode select (high=8-bit, low=16-bit) |
| پن 33 | NC — Not connected |
| پن 34 | NC — Not connected |
| پن 35 | NC — Not connected |
| پن 36 | NC — Not connected |
| پن 37 | NC — Not connected |
| پن 38 | DVDD — Digital +5V supply |
| پن 39 | D15 — Data bit 15 (MSB) |
| پن 40 | D14 — Data bit 14 |
| پن 41 | D13 — Data bit 13 |
| پن 42 | D12 — Data bit 12 |
| پن 43 | D11 — Data bit 11 |
| پن 44 | D10 — Data bit 10 |
| پن 45 | D9 — Data bit 9 |
| پن 46 | D8 — Data bit 8 |
| پن 47 | AGND — Analog ground |
| پن 48 | PAD — Exposed thermal pad - tie to analog ground plane |
عام استعمالات
ADS8401IBPFBT کے لیے موزوں ہے 7 ایپلیکیشنs: Industrial Process-Control Data Acquisition, Multi-Axis Servo Position Feedback, Telecom Optical Power Monitoring, Medical Imaging Front-End, Automotive Sensor Acquisition, Precision Data-Acquisition PCBs, Test & Measurement Instrumentation.
Industrial Process-Control Data Acquisition
The ADS8401IBPFBT fits industrial process-control DAQ cards because its 1.25 MSPS throughput and 16-bit resolution digitize thermocouple, RTD, and 4-20 mA conditioned signals with ±3 LSB INL accuracy. The unipolar single-ended input pairs directly with industrial transmitter outputs. Designers place this ADC on the analog side of the signal chain and use the internal 4.096 V reference to avoid extra components and cost.
تجویز کردہ
Multi-Axis Servo Position Feedback
In multi-axis servo control loops, the ADS8401IBPFBT's SAR architecture provides single-cycle deterministic latency critical for closed-loop bandwidth. Its 16-bit resolution and ~92 dB SFDR let it capture resolver-to-digital conversion outputs and incremental encoder feedback without latency-induced jitter. The parallel 16-bit bus reads in one access, simplifying the FPGA or DSP interface in deterministic control systems.
تجویز کردہ
Telecom Optical Power Monitoring
Optical-network line cards use the ADS8401IBPFBT to digitize transimpedance-amplified photodiode signals monitoring transmit power. Its 0-4.096 V input range matches silicon PIN photodiode conditioning directly, and the 1.25 MSPS throughput monitors multiple channels in time-multiplexed fashion. The internal 4.096 V reference eliminates temperature-trim drift that external references would otherwise introduce.
تجویز کردہ
Medical Imaging Front-End
Ultrasound and patient-monitoring instruments use the ADS8401IBPFBT for mid-tier channel digitizing, taking advantage of 16-bit dynamic range and parallel bus for fast pixel read-out. The −40 to +85°C industrial temperature grade supports hospital-cart and bedside applications. Its SAR architecture ensures the per-sample accuracy required when reconstructing medical waveforms, fitting analog front-end boards in diagnostic imaging peripherals.
تجویز کردہ
Automotive Sensor Acquisition
Automotive powertrain and chassis ECUs use the ADS8401IBPFBT to digitize position, pressure, and current-sensor outputs where the I-grade temperature range (−40 to +85°C) provides margin over consumer conditioning. With an external bipolar front-end it handles automotive sensors in non-safety-critical paths. For safety-critical paths, TI's AEC-Q100-qualified ADC families such as ADS8544 should be used instead of this industrial-grade part.
تجویز کردہ
Precision Data-Acquisition PCBs
Bench-top and rack-mounted instrumentation cards use the ADS8401IBPFBT for digitizing transducer analog front-ends where 16-bit straight-binary output integrates easily with FPGA or MCU post-processing pipelines. Designers pair it with low-noise LDO regulators and external reference buffers for laboratory-grade accuracy. The parallel 8-bit or 16-bit interface accommodates both legacy 8-bit microcontrollers and modern FPGAs in the same PCB footprint.
تجویز کردہ
Test & Measurement Instrumentation
Test equipment manufacturers apply the ADS8401IBPFBT in semi-modular instruments where 16-bit resolution and 1.25 MSPS capture transient inputs that flash ADCs under-sample. The parallel bus simplifies integration with discrete-logic or FPGA capture modules in oscilloscope plug-ins and data loggers. Its internal 4.096 V reference saves component cost without compromising DC accuracy at the test-bench level, and power consumption stays under 110 mW during continuous full-rate acquisition runs.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ADS8401IBPFBT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ADS8401IBPFBR | ADS8401IPFBT | ADS8411IBPFBR | ADS8405IPFBTG4 | ADS8401IBPFBTG4 |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (PFB), 7x7 mm | 48-TQFP (PFB), 7x7 mm - same | 48-TQFP (PFB), 7x7 mm - same | 48-TQFP (PFB), 7x7 mm - same | 48-TQFP (PFB), 7x7 mm - same | 48-TQFP (PFB), 7x7 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Sample Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 2 MSPS (+60%) | 1.25 MSPS | 1.25 MSPS |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Architecture | SAR (Successive Approx) | SAR | SAR | SAR | SAR | SAR |
| Internal Reference | 4.096 V, on-chip | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
| Digital 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 |
| Operating Temperature | −40 to +85 °C (Industrial) | −40 to +85 °C | −40 to +85 °C | −40 to +85 °C | −40 to +85 °C | −40 to +85 °C |
| Reel Quantity | 250 (small reel) | 1,000 (full reel) | 250 (small reel) | 1,000 (full reel) | 250 (Pb-free) | 250 (Pb-free) |
اہم امتیازی خصوصیات
- Higher sample rate vs older generation (بمقابلہADS8401IBPFBR)
- Smaller reel for low-volume prototyping (بمقابلہADS8401IBPFBR)
- Easy speed upgrade path (بمقابلہADS8401IPFBT)
- Pb-free RoHS finish variant available (بمقابلہADS8401IPFBT)
ڈیزائن نوٹس
Estimated: at +5V AVDD and 1.25 MSPS full-rate operation, the ADS8401IBPFBT consumes approximately 110 mW internally (22 mA). Use a 0.1 µF ceramic bypass as close as possible to each AVDD pin (1, 2, 18, 23, 24) and a 10 µF low-ESR tantalum or ceramic bulk capacitor within 0.1 inch of the package. A separate analog ground island tied to DGND at a single point under pin 31 prevents digital switching noise from coupling into the analog reference.
Do not route the BYTE mode-pin or CS/PCB digital lines parallel to the analog input near pin 3; crosstalk can appear as 1-2 LSB of repeating noise. The 16-bit-parallel-bus lines (D[15:0] on pins 39-46, 4-7) should be equal-length and series-terminated when driving traces longer than 25 mm. Always issue a dummy read (twice the conversion time, typically 1.6 µs) after power-up before reading valid data to discharge the internal reference capacitor ladder.
Place the 47 µF reference bypass capacitors REFM-to-REFOUT as close to the package as possible (within 5 mm), using the dedicated CAP1/CAP2/CAP3 pins (10, 11, 12, 13). The exposed thermal pad (pin 48) MUST be soldered to a 1 cm² copper pour on the PCB top layer for thermal relief; without this attachment, junction temperatures rise roughly 15-20 °C/W higher during continuous full-rate operation.
When driving the analog input (pin 3) with a source impedance greater than 100 Ω, add a wideband op-amp buffer (e.g., OPA2277) within 2-3 inches of the pin to preserve THD performance above −85 dB. For multi-channel systems scanning this ADC through an external MUX, allow at least 1 µs of acquisition time before initiating conversion and add a 50 Ω series-termination resistor at the MUX output for settling improvement.
تعمیل کی معلومات
Pb-free matte-tin lead finish. Not AEC-Q100 qualified - choose the TI ADS8544 family for automotive applications requiring AEC-Q100 qualification.