ADS8402IPFBTG4 - 16-Bit 1.25MSPS Parallel ADC | Texas Instruments
Référence : ADS8402IPFBTG4 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.85 | $14,85 |
| 10 | $13.2 | $132,00 |
| 100 | $11.5 | $1 150,00 |
| 500 | $9.95 | $4 975,00 |
| 1 000 | $8.75 | $8 750,00 |
ADS8402IPFBTG4 Présentation
An ADC (Analog-to-Digital Converter) is a data conversion integrated circuit that samples continuous analog signals and quantizes them into discrete digital codes. Successive-approximation register (SAR) ADCs like the ADS8402IPFBTG4 use a binary-search algorithm through an internal DAC to converge on the input voltage one bit per clock cycle, providing deterministic latency and excellent noise performance at mid-to-high sampling rates. SAR ADCs sit within the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor, and serve as the bridge between analog sensors/signals and digital processors (DSPs, FPGAs, microcontrollers).
Key features of the ADS8402IPFBTG4 include 1.25 MSPS maximum sampling rate, 16-bit resolution with no missing codes, pseudo-bipolar differential input range, on-chip 4.096 V reference, low power consumption optimized for micro-power designs, and a standard parallel (byte-selectable) digital interface compatible with common microcontrollers and DSPs. Industrial temperature operation from -40C to +85C ensures reliability in factory and outdoor environments.
Architecturally, the device uses a charge-redistribution SAR core, a high-bandwidth differential track-and-hold, and an internal low-drift reference. The pseudo-bipolar differential input accepts signals centered around the common-mode voltage, simplifying interface with bridge sensors, instrumentation amplifiers, and single-ended signals after DC biasing.
Typical applications include industrial process control, multi-channel data acquisition systems, optical encoder feedback, vibration analysis, precision weigh scales, and motor control position feedback. The parallel interface simplifies connection to legacy microcontrollers and DSPs that lack high-speed serial peripherals.
When designing with this device, pay attention to analog and digital supply decoupling and layout: route AVDD and DVDD separately with star-ground topology, place 10 uF bulk + 0.1 uF ceramic bypass capacitors close to each supply pin, and isolate the analog and digital ground planes with a single-point connection beneath the ADC. Failure to isolate grounds will couple digital switching noise into the analog front end and degrade SNR.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not found in the manufacturer datasheet alone, helping engineers select, source, and implement the ADS8402IPFBTG4 with confidence.
Alternatives de remplacement direct pour ADS8402IPFBTG4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADS8402IPFBTG4 (même facteur de forme et même empreinte) — différant par Input Type, Package, Analog Supply Voltage, Data Interface, Sample Rate.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADS8402IPFBR
✅ Remplacement direct✓ En stock
$10.43 / unité
Voir la fiche technique →ADS8401IPFBRG4
✅ Remplacement direct✓ En stock
$11.75 / unité
Voir la fiche technique →ADS8383IPFBTG4
✅ Remplacement direct✓ En stock
$11.4 / unité
Voir la fiche technique →ADS8382IRHPR
✅ Remplacement direct✓ En stock
$9.65 / unité
Voir la fiche technique →ADS8482IBRGZR
✅ Remplacement direct✓ En stock
$14.45 / unité
Voir la fiche technique →ADS8481IRGZR
✅ Remplacement direct✓ En stock
$8.1 / unité
Voir la fiche technique →ADS8402IPFBTG4 Valeurs maximales et caractéristiques électriques
| Résolution | 16 bits |
| Sampling Rate (Max) | 1.25 MSPS |
| ADC Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 1 |
| Input Type | Pseudo-Bipolar Fully Differential |
| Analog Supply Voltage | +5 V (AVDD) |
| Digital Supply Voltage | +5 V (DVDD) |
| Internal Reference Voltage | 4.096 V |
| Digital Interface | Parallel (16-bit / 8-bit bus selectable) |
| Plage de température de fonctionnement | -40C to +85C |
| Package Type | 48-pin TQFP (PFB) |
| Package Code | TFQFP / TQFP-48 |
| Terminal Form | Gull Wing |
| Type de montage | Surface Mount |
Configuration des broches de ADS8402IPFBTG4
| Broche 1 | AVDD — Analog supply (+5 V) |
| Broche 2 | IN+ — Positive analog input |
| Broche 3 | IN- — Negative analog input |
| Broche 4 | REF — Reference voltage input/output (4.096 V) |
| Broche 5 | AGND — Analog ground |
| Broche 6 | AVDD — Analog supply (+5 V) |
| Broche 7 | AVDD — Analog supply (+5 V) |
| Broche 8 | AVDD — Analog supply (+5 V) |
| Broche 9 | CONVST — Conversion start input |
| Broche 10 | CS — Chip select (active low) |
| Broche 11 | RD — Read input (active low) |
| Broche 12 | BUSY — Busy output (active high during conversion) |
| Broche 13 | DVDD — Digital supply (+5 V) |
| Broche 14 | DGND — Digital ground |
| Broche 15 | BYTE — Byte mode select |
| Broche 16 | HBEN — High byte enable |
| Broche 17 | DB15 — Data bit 15 (MSB) |
| Broche 18 | DB14 — Data bit 14 |
| Broche 19 | DB13 — Data bit 13 |
| Broche 20 | DB12 — Data bit 12 |
| Broche 21 | DB11 — Data bit 11 |
| Broche 22 | DB10 — Data bit 10 |
| Broche 23 | DB9 — Data bit 9 |
| Broche 24 | DB8 — Data bit 8 |
| Broche 25 | DGND — Digital ground |
| Broche 26 | DVDD — Digital supply (+5 V) |
| Broche 27 | DB7 — Data bit 7 |
| Broche 28 | DB6 — Data bit 6 |
| Broche 29 | DB5 — Data bit 5 |
| Broche 30 | DB4 — Data bit 4 |
| Broche 31 | DB3 — Data bit 3 |
| Broche 32 | DB2 — Data bit 2 |
| Broche 33 | DB1 — Data bit 1 |
| Broche 34 | DB0 — Data bit 0 (LSB) |
| Broche 35 | DGND — Digital ground |
| Broche 36 | DVDD — Digital supply (+5 V) |
| Broche 37 | DGND — Digital ground |
| Broche 38 | NC — Not connected (per datasheet) |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | AGND — Analog ground |
| Broche 45 | AGND — Analog ground |
| Broche 46 | AGND — Analog ground |
| Broche 47 | REF — Reference voltage bypass |
| Broche 48 | AVDD — Analog supply (+5 V) |
Applications typiques
ADS8402IPFBTG4 convient pour 6 applications: Industrial Process Control, Multi-Channel Data Acquisition Systems, Optical Encoder Position Feedback, Precision Weigh Scales, Vibration Analysis, Motor Control Position Feedback.
Industrial Process Control
The ADS8402IPFBTG4's 1.25 MSPS sampling rate and 16-bit resolution suit industrial process control loops where deterministic SAR latency avoids the pipeline-delay artifacts of higher-speed pipeline ADCs. With its pseudo-bipolar fully differential input, the device accepts 4-20 mA current-loop-derived signals biased around mid-supply, rejecting common-mode noise from long cable runs in factory environments. The integrated 4.096 V reference eliminates external drift-sensitive components, while the parallel interface connects directly to legacy PLCs and DSP-based controllers. Operates from -40C to +85C with industrial-grade reliability.
Recommandé
Multi-Channel Data Acquisition Systems
In multi-channel data acquisition systems, the ADS8402IPFBTG4 pairs with external analog multiplexers and instrumentation amplifiers to digitize multiple sensor channels sequentially. The SAR architecture provides zero-latency conversions, critical for time-correlated multi-channel sampling, while the 1.25 MSPS rate enables aggregate throughput of hundreds of kSPS per channel after demux overhead. The parallel interface supports DMA-style data capture into FPGAs or microcontrollers with hardware handshaking via BUSY and RD pins. Differential input rejection of common-mode noise from sensor cables preserves 16-bit accuracy.
Recommandé
Optical Encoder Position Feedback
Position feedback in optical encoder systems demands deterministic conversion latency, which the ADS8402IPFBTG4's SAR architecture provides without the variable group-delay of pipeline ADCs. The 1.25 MSPS sampling rate comfortably oversamples encoder quadrature signals after interpolation, supporting sub-arc-second resolution in precision motion control. The pseudo-bipolar differential input accepts sinusoidal encoder outputs biased around VREF/2, while the parallel bus enables direct connection to FPGA motion-control logic. Integrated reference simplifies the analog supply chain for compact encoder electronics.
Recommandé
Precision Weigh Scales
Precision weigh scales use 24-bit sigma-delta ADCs for slow high-resolution readings, but the ADS8402IPFBTG4 serves fast in-motion weighing applications where throughput matters more than ultimate noise floor. The 1.25 MSPS rate captures transient forces on conveyor scales, while the 16-bit resolution provides sufficient dynamic range for ±0.1% weighing accuracy. The differential input accepts bridge sensor outputs with excellent common-mode rejection, and the integrated reference reduces BOM cost in price-sensitive commercial scale designs. Industrial temperature grade supports outdoor and food-processing environments.
Recommandé
Vibration Analysis
Vibration analysis for predictive maintenance and structural health monitoring requires capturing wideband mechanical signals without aliasing, and the ADS8402IPFBTG4's 1.25 MSPS rate supports analysis of vibration frequencies up to ~600 kHz per Nyquist, with anti-aliasing filters in front. The SAR converter's deterministic latency ensures phase-coherent FFT analysis, while the 16-bit dynamic range captures subtle vibration signatures indicative of bearing wear or imbalance. Differential input rejects ground noise from industrial motor environments, and parallel bus streams sample data directly to DSPs for real-time spectral analysis.
Recommandé
Motor Control Position Feedback
Motor control position and current feedback loops rely on deterministic ADC latency to avoid control-loop instability, and the ADS8402IPFBTG4's SAR converter delivers single-cycle conversion delay ideal for field-oriented control (FOC) of servo drives. The 1.25 MSPS rate supports current-loop bandwidths of 50-100 kHz after digital decimation, and the parallel interface integrates with TI C2000 microcontrollers and dedicated motor-control DSPs. The pseudo-bipolar differential input accepts current-sense amplifier outputs, while industrial temperature operation handles traction and industrial-drive thermal environments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADS8402IPFBTG4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADS8402IPFBR | ADS8401IPFBRG4 | ADS8383IPFBTG4 | ADS8382IRHPR | ADS8482IBRGZR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) | 48-pin TQFP (PFB) |
| Resolution | 16 bits | 16 bits | 16 bits | 18 bits | 18 bits | 18 bits |
| Sampling Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS | 500 kSPS | 500 kSPS | 1 MSPS |
| Input Type | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | True Bipolar Differential | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential | Pseudo-Bipolar Differential |
| Analog Supply | +5 V | +5 V | +5 V | +5 V | +5 V | +5 V |
| Digital Interface | Parallel (16/8-bit) | Parallel (16/8-bit) | Parallel (16/8-bit) | Parallel (18/16-bit) | Parallel (18/16-bit) | Parallel (18/16-bit) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principaux différenciateurs
- Industry-standard 48-pin TQFP (PFB) footprint with extensive pin-compatible family (vs ADS8383IPFBTG4 (18-bit upgrade))
- Integrated 4.096 V reference eliminates external reference IC (vs ADS8482IBRGZR (18-bit upgrade))
- Deterministic SAR latency with zero pipeline delay (vs Pipeline ADCs at similar speed)
- Pseudo-bipolar differential input from single +5V supply (vs ADS8401IPFBRG4 (true bipolar))
Notes de conception
Separate analog (AVDD) and digital (DVDD) supplies with independent decoupling: place a 10 uF tantalum plus 0.1 uF ceramic bypass capacitor within 5 mm of each AVDD/DVDD pin. Star-ground AVDD and DVDD returns to a single point beneath the ADC to prevent digital switching currents from corrupting the analog front-end. A common mistake is sharing the analog and digital ground plane without isolation, which couples 5V logic noise into the SAR comparator and degrades SNR.
Route the parallel data bus DB[15:0] with matched trace lengths (within ~25 mil of each other) to minimize skew, and keep the digital bus away from the analog IN+/IN- traces. Place a ground pour under the data bus and guard the analog input pair with ground traces on both sides to reduce capacitive coupling. Use a 4-layer PCB with dedicated analog and digital ground planes for best noise immunity in mixed-signal layouts.
Do not connect an external reference directly to the REF pin while the internal reference is enabled - this causes contention and can damage the reference cell. If using an external reference, the datasheet indicates the internal reference must be disabled via the appropriate configuration. Also avoid driving the analog input beyond AVDD + 0.3 V or below AGND - 0.3 V, as the input ESD diodes will conduct and inject non-linear charge into the sample capacitor, degrading linearity.
For optimal dynamic performance, drive the IN+ and IN- inputs with a low-impedance differential source (such as an instrumentation amplifier or differential driver op-amp) and AC-couple the common-mode voltage through a transformer if the source is single-ended. The SAR converter's 1.25 MSPS rate requires the input amplifier to settle within the acquisition window - typically less than 200 ns - so choose an op-amp with at least 5x the converter's settling bandwidth.
Informations de conformité
RoHS compliance not explicitly stated in verified web data - marker used in specs. TI ADS8402 family is generally lead-free per TI packaging standards; full material declaration should be requested from TI directly. AEC-Q100 not applicable - this is an industrial-grade part.