ADS8406IPFBRG4 - 16-Bit 1.25MSPS SAR ADC | Texas Instruments
MPN: ADS8406IPFBRG4 ✓ AktifADS8406IPFBRG4 Ringkasan
An SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm through an internal capacitor-based digital-to-analog converter to compare the sampled input against successive reference-weighted levels, settling to a digital output in N conversion cycles for N bits of resolution. SAR ADCs sit within the broader ADC taxonomy alongside delta-sigma, pipeline, and flash converters, and are valued for low latency, deterministic behavior, and excellent DC accuracy without the latency penalty of oversampling converters.
Key features of the ADS8406IPFBRG4 include 1.25 MHz sample rate, a fully differential analog input that accepts pseudo-bipolar input ranges, an internal low-drift 4.096 V reference, and a wide 2.95 V to 5.25 V analog supply range with a separate digital I/O supply. The device supports both 16-bit parallel output and an 8-bit bus option using two read cycles, simplifying connection to 8-bit microcontrollers and 16-bit DSPs alike. Typical power dissipation is approximately 155 mW at 1.25 MSPS, and the part is specified over the -40 C to +85 C industrial temperature range.
Typical applications include industrial process control, optical networking power monitoring, multi-channel data acquisition systems, medical instrumentation front-ends, and high-speed closed-loop control. The combination of high linearity, internal reference, and parallel interface makes the ADS8406 a strong fit for systems that demand deterministic throughput and DC accuracy rather than high channel density.
When designing with the ADS8406IPFBRG4, decouple AVD and DVDD with separate 1 uF and 100 nF ceramic capacitors placed as close as possible to the supply pins, and use a ground plane to control digital return currents. Drive the analog input with a low-impedance, low-distortion amplifier such as the THS4031 or OPA227 to preserve the converter's linearity at the rated sample rate. Observe the t_acq acquisition-time and t_conv conversion-time timing budgets in the timing diagram to avoid degraded SNR at full throughput.
Alternatif penggantian untuk ADS8406IPFBRG4 — 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 ADS8406IPFBRG4 (sama faktor bentuk dan footprint) — berbeda di dalam Package, Input Type, Resolution, Sample Rate, Conversion Time.
ADS8406IPFBTG4
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS8402IPFBR
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS8401IPFBRG4
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →ADS8412IBPFBRG4
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADS8383IPFBRG4
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →ADS8406IPFBRG4 Rating Maksimal & Karakteristik Listrik
| Resolusi | 16 bit |
| Sample Rate | 1.25 MSPS |
| Architecture | SAR (Successive Approximation Register) |
| Number of Inputs | 1 |
| Input Type | Pseudo-bipolar, fully differential |
| Integral Non-Linearity (INL) | 0.0031% (typ) |
| Conversion Time | 650 ns (max) |
| Internal Reference | 4.096 V |
| Analog Supply Voltage (AVDD) | 2.95 V to 5.25 V |
| Digital I/O Supply (DVDD) | 2.7 V to 5.25 V |
| Power Dissipation | 155 mW at 1.25 MSPS |
| Output Interface | Parallel, 16-bit or 8-bit (two read cycles) |
| Rentang Suhu Kerja | -40 C to +85 C |
| Paket | 48-pin TQFP (PFB) 7x7 mm |
| Tipe Mounting | Surface Mount |
| Status RoHS | Compliant |
Konfigurasi Pin ADS8406IPFBRG4
| Pin produk 1 | AVDD — Analog supply (2.95 V to 5.25 V) |
| Pin produk 2 | REF — 4.096 V reference output / input |
| Pin produk 3 | GND — Analog ground |
| Pin produk 4 | IN+ — Differential positive analog input |
| Pin produk 5 | IN- — Differential negative analog input |
| Pin produk 6 | GND — Analog ground |
| Pin produk 7 | AVDD — Analog supply |
| Pin produk 8 | AVDD — Analog supply |
| Pin produk 9 | GND — Analog ground |
| Pin produk 10 | BYTE — Parallel mode select (16-bit / 8-bit) |
| Pin produk 11 | D15 — Parallel data output bit 15 (MSB) |
| Pin produk 12 | D14 — Parallel data output bit 14 |
| Pin produk 13 | D13 — Parallel data output bit 13 |
| Pin produk 14 | D12 — Parallel data output bit 12 |
| Pin produk 15 | D11 — Parallel data output bit 11 |
| Pin produk 16 | D10 — Parallel data output bit 10 |
| Pin produk 17 | D9 — Parallel data output bit 9 |
| Pin produk 18 | D8 — Parallel data output bit 8 |
| Pin produk 19 | DVDD — Digital I/O supply (2.7 V to 5.25 V) |
| Pin produk 20 | DGND — Digital ground |
| Pin produk 21 | D7 — Parallel data output bit 7 |
| Pin produk 22 | D6 — Parallel data output bit 6 |
| Pin produk 23 | D5 — Parallel data output bit 5 |
| Pin produk 24 | D4 — Parallel data output bit 4 |
| Pin produk 25 | D3 — Parallel data output bit 3 |
| Pin produk 26 | D2 — Parallel data output bit 2 |
| Pin produk 27 | D1 — Parallel data output bit 1 |
| Pin produk 28 | D0 — Parallel data output bit 0 (LSB) |
| Pin produk 29 | DGND — Digital ground |
| Pin produk 30 | DVDD — Digital I/O supply |
| Pin produk 31 | RANGE — Input range select |
| Pin produk 32 | GND — Ground |
| Pin produk 33 | CS — Chip select (active low) |
| Pin produk 34 | RD — Read input (active low) |
| Pin produk 35 | BUSY — Conversion in progress (active high) |
| Pin produk 36 | CONVST — Conversion start input |
| Pin produk 37 | RESET — Reset input (active low) |
| Pin produk 38 | GND — Ground |
| Pin produk 39 | NC — Not connected |
| Pin produk 40 | NC — Not connected |
| Pin produk 41 | NC — Not connected |
| Pin produk 42 | GND — Ground |
| Pin produk 43 | AVDD — Analog supply |
| Pin produk 44 | GND — Analog ground |
| Pin produk 45 | REFGND — Reference ground |
| Pin produk 46 | REF — 4.096 V reference |
| Pin produk 47 | AVDD — Analog supply |
| Pin produk 48 | AVDD — Analog supply |
Aplikasi Umum
ADS8406IPFBRG4 cocok untuk 6 aplikasis: Industrial Process Control Data Acquisition, Optical Power Monitoring, Medical Instrumentation Front-End, Multi-Channel Data Acquisition Systems, High-Speed Closed-Loop Control, Test and Measurement Instrumentation.
Industrial Process Control Data Acquisition
The ADS8406IPFBRG4 fits industrial process control because its 16-bit resolution, 0.0031% INL, and 1.25 MSPS throughput digitize thermocouple, RTD, and 4-20 mA conditioned signals with high DC accuracy. Its pseudo-bipolar fully differential input accepts signals that swing around a non-zero common-mode voltage, which is typical of current-shunt and bridge-sensor front-ends on a factory floor. The parallel interface simplifies connection to a host PLC CPU or DSP, and the -40 C to +85 C industrial temperature range covers cabinet-mounted equipment.
Direkomendasikan
Optical Power Monitoring
The ADS8406IPFBRG4 suits optical power monitoring in DWDM and EDFA systems because its 1.25 MSPS throughput tracks photodiode current transients faster than audio-band converters, while its 16-bit dynamic range resolves milliamp-level tap currents. The fully differential input rejects ground noise from switching power supplies in the line card, and the parallel 16-bit output feeds an FPGA for AGC and alarm decisions. The internal 4.096 V reference eliminates a separate reference IC, reducing BOM count on dense line cards.
Direkomendasikan
Medical Instrumentation Front-End
The ADS8406IPFBRG4 supports medical instrumentation such as patient monitoring, ECG, and EEG acquisition modules where 16-bit resolution, 0.0031% INL, and 1.25 MSPS sample rate deliver diagnostic-grade accuracy. The pseudo-bipolar fully differential input rejects common-mode interference from power-line and CRT deflection noise, critical for low-amplitude bioelectric signals. The parallel interface simplifies connection to a host DSP that performs digital filtering, and the industrial temperature range covers portable and clinical-grade equipment.
Direkomendasikan
Multi-Channel Data Acquisition Systems
The ADS8406IPFBRG4 fits multi-channel data acquisition modules where its 1.25 MSPS throughput and deterministic SAR latency allow fast channel-to-channel settling through an external multiplexer. The 16-bit resolution and 0.0031% INL provide DC accuracy for industrial vibration, acoustic, and strain-gage measurements. The parallel interface and 8-bit read mode ease connection to 8-bit MCUs and 16-bit DSPs, and the internal 4.096 V reference simplifies the analog supply chain across multiple channels on the same PCB.
Direkomendasikan
High-Speed Closed-Loop Control
The ADS8406IPFBRG4 enables high-speed closed-loop control in motor drives, valve positioning, and servo systems where the SAR architecture's deterministic single-cycle conversion produces consistent loop delays at 1.25 MSPS. The 16-bit resolution and 0.0031% INL provide the feedback precision required for current-mode and torque-control loops, while the fully differential input rejects switching noise from the inverter stage. Parallel 16-bit output to an FPGA or DSP enables sub-microsecond loop execution.
Direkomendasikan
Test and Measurement Instrumentation
The ADS8406IPFBRG4 serves test and measurement instruments such as digital multimeters, oscilloscope front-ends, and bench-top data loggers where 16-bit resolution, 1.25 MSPS throughput, and 0.0031% INL support accurate waveform capture and DC measurement. The pseudo-bipolar fully differential input accepts voltage and current waveforms that swing around a non-zero common-mode level, common in differential probe and shunt measurements. The internal 4.096 V reference and parallel interface simplify integration with bench-instrument signal-processing blocks.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADS8406IPFBRG4 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ADS8406IPFBTG4 | ADS8402IPFBR | ADS8401IPFBRG4 | ADS8412IBPFBRG4 | ADS8383IPFBRG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-TQFP (PFB) 7x7 mm | 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 |
| Sample Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 20 MSPS (16x faster, pipelined) | 500 kSPS (-60%) |
| Architecture | SAR | SAR | SAR | SAR | Pipelined | SAR |
| Input Type | Pseudo-bipolar fully differential | Pseudo-bipolar fully differential | Pseudo-bipolar fully differential | Unipolar single-ended | Fully differential | Pseudo-bipolar differential |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 2.5 V | Internal | Internal |
| Output Interface | Parallel 16-bit / 8-bit | Parallel 16-bit / 8-bit | Parallel 16-bit / 8-bit | Parallel 16-bit / 8-bit | Parallel 16-bit / 8-bit | Parallel 18-bit / byte |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Approx. 1k Price (USD) | 11.92 | Similar (same die) | Similar | Similar | Higher (faster ADC) | Higher (18-bit) |
Diferensiator Kunci
- True 16-bit no-missing-code performance with internal 4.096 V reference (vsADS8401IPFBRG4)
- Higher sample rate than 18-bit alternative at the same 48-TQFP footprint (vsADS8383IPFBRG4)
- SAR architecture for deterministic, low-latency conversion (vsADS8412IBPFBRG4)
Catatan Desain
Decouple AVDD and DVDD with separate 1 uF and 100 nF ceramic capacitors placed as close as possible to the supply pins. Use a ferrite bead or small resistor between AVDD and DVDD to isolate analog and digital return currents. The TI datasheet recommends placing the 1 uF bulk capacitor within 5 mm of each AVDD pin and the 100 nF high-frequency bypass within 1-2 mm. Failure to decouple adequately can couple digital switching noise into the analog front-end and degrade SNR at the full 1.25 MSPS rate.
Use a continuous analog ground plane under and around the ADC, and route digital return currents to a separate digital ground that joins the analog ground at a single point near the ADC ground pins. This star-ground technique prevents digital switching transients from corrupting the analog sample-and-hold. Place the input driver amplifier (e.g. THS4031 or OPA227) within 25 mm of the IN+ and IN- pins to minimize input-capacitance-induced settling errors at 1.25 MSPS.
Observe the t_acq acquisition time and t_conv conversion time timing budgets in the datasheet timing diagram to avoid degraded SNR at full throughput. Driving the analog input with a high-impedance source violates the 650 ns acquisition time and can introduce aperture-dependent gain error. Also, do not toggle CS, RD, or CONVST during the conversion window; consult the timing diagram to ensure t_wH and t_wL pulse widths are met. Lastly, leave the BYTE pin tied to DVDD or DGND through a short trace to prevent the parallel mode from drifting mid-read.
Informasi Konformitas
RoHS compliant per TI product page. Not AEC-Q100 qualified (industrial grade). Lead-free (Pb-free) and halogen-free per the -G4 suffix designation.
