ADS8371IPFBR - 16-Bit 750kHz SAR ADC w/ Parallel | Texas Instruments
N.º de pieza: ADS8371IPFBR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.05 | $130,50 |
| 100 | $11.6 | $1.160,00 |
| 500 | $10.45 | $5.225,00 |
| 1.000 | $9.28 | $9.280,00 |
ADS8371IPFBR Descripción general
A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm and an internal capacitive DAC to digitize an input signal in N conversion cycles for N bits of resolution. SAR ADCs offer deterministic latency, no-pipeline delay, and excellent DC accuracy, which makes them the architecture of choice for multiplexed data acquisition, industrial control loops, and precision instrumentation where single-shot accuracy matters more than raw speed. The ADS8371 sits within TI's high-performance SAR portfolio, between slower 16-bit precision converters and faster 14-bit pipelined parts.
Key features include 750 kSPS maximum sample rate, 16-bit resolution with no missing codes, 84 dB SNR at 100 kHz input, parallel 16-bit output bus, and an operating temperature range of -40 °C to +85 °C. The wide digital supply range (2.7 V to 5.25 V) simplifies interface to 3.3 V or 5 V microcontrollers, DSPs, and FPGAs without level shifters. The 48-TQFP (PFB) package offers a thermal pad for improved heat dissipation.
Architecturally, the ADS8371 uses a charge-redistribution SAR core with input sampling on a switched-capacitor front-end, followed by an automatic power-down between conversions that keeps average dissipation low. The external reference (typically a low-noise 4.096 V or 5 V reference such as the REF5040) sets full-scale range and directly determines noise and drift performance. The parallel interface includes a BYTE mode for 8-bit-wide host buses.
Typical applications include industrial process control and multi-channel data acquisition systems, precision portable instrumentation, medical monitoring equipment, optical networking power monitoring, and high-speed closed-loop servo control. The deterministic single-cycle latency is especially valuable in digital control loops where pipeline delay is unacceptable.
When designing with the ADS8371, place the input RC network, decoupling capacitors, and reference bypass capacitors within 5 mm of the respective pins and use a solid ground plane under the device to preserve the 16-bit noise floor. The external reference's initial accuracy and temperature drift set the system-level absolute accuracy, so a low-drift reference (e.g., REF5040) is recommended for instrumentation-grade results.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and design guidance not found in the manufacturer datasheet alone.
Alternativas directas para ADS8371IPFBR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ADS8371IPFBR (mismo factor de forma y huella) — difiere en Input Type, Package, Resolution.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADS8371IPFBT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8371IPFBRG4
✅ Sustitución directa✓ En stock
$10.5 / unidad
Ver hoja de datos →ADS8371IPFBTG4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8372IPFBR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8381IPFBR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8371IPFBR Valores máximos y características eléctricas
| Resolución | 16 bits |
| Sample Rate (max) | 750 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Input Type | Unipolar, single-ended |
| Input Range | 0 V to VREF (unipolar) |
| Reference Type | External |
| Data Interface | Parallel (16-bit, BYTE mode supported) |
| Analog Supply Voltage | 5 V |
| Digital I/O Supply | 2.7 V to 5.25 V |
| Rango de temperatura de funcionamiento | -40 °C to +85 °C |
| Encapsulado | 48-TQFP (PFB), 7 mm x 7 mm with thermal pad |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Lead-Free Finish | Yes (PBF) |
Configuración de pines de ADS8371IPFBR
| Pin 1 | DVDD — Digital I/O supply, 2.7 V to 5.25 V |
| Pin 2 | DGND — Digital ground |
| Pin 3 | DB15 — Data bit 15 (MSB) |
| Pin 4 | DB14 — Data bit 14 |
| Pin 5 | DB13 — Data bit 13 |
| Pin 6 | DB12 — Data bit 12 |
| Pin 7 | DB11 — Data bit 11 |
| Pin 8 | DB10 — Data bit 10 |
| Pin 9 | DB9 — Data bit 9 |
| Pin 10 | DB8 — Data bit 8 |
| Pin 11 | DB7 — Data bit 7 |
| Pin 12 | DB6 — Data bit 6 |
| Pin 13 | DB5 — Data bit 5 |
| Pin 14 | DB4 — Data bit 4 |
| Pin 15 | DB3 — Data bit 3 |
| Pin 16 | DB2 — Data bit 2 |
| Pin 17 | DB1 — Data bit 1 |
| Pin 18 | DB0 — Data bit 0 (LSB) |
| Pin 19 | BYTE — Byte mode select (8-bit bus) |
| Pin 20 | RST — Reset input, active low |
| Pin 21 | CS — Chip select, active low |
| Pin 22 | RD — Read input, active low |
| Pin 23 | BUSY — Busy output, active high during conversion |
| Pin 24 | CONVST — Conversion start, active high |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | AVDD — Analog supply, 5 V |
| Pin 27 | AGND — Analog ground |
| Pin 28 | REF — External reference input |
| Pin 29 | REFGND — Reference ground |
| Pin 30 | REF — External reference input (bypass pin) |
| Pin 31 | IN+ — Analog input, positive |
| Pin 32 | IN- — Analog input, negative (often tied to AGND for unipolar) |
| Pin 33 | AGND — Analog ground |
| Pin 34 | AVDD — Analog supply, 5 V |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | NC — Not connected (per datasheet) |
| Pin 37 | NC — Not connected (per datasheet) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
| Pin 45 | DGND — Digital ground |
| Pin 46 | DVDD — Digital I/O supply, 2.7 V to 5.25 V |
| Pin 47 | NC — Not connected (per datasheet) |
| Pin 48 | DGND — Digital ground |
Aplicaciones típicas
ADS8371IPFBR es adecuado para 7 aplicacións: Industrial Process Control & Data Acquisition, Medical Monitoring Equipment, Precision Portable Instrumentation, Optical Networking Power Monitoring, High-Speed Closed-Loop Servo Control, Power Supply Telemetry & Protection, Audio Test & Measurement.
Industrial Process Control & Data Acquisition
The ADS8371IPFBR is ideal for industrial process-control and multi-channel data-acquisition systems because of its 16-bit no-missing-codes resolution, 750 kSPS throughput, and deterministic single-cycle SAR latency. In a typical PLC or distributed I/O card, the converter digitizes 4-20 mA-conditioned signals from thermocouples, RTDs, and pressure transducers, with the external TI REF5040 reference setting the absolute accuracy and the wide 2.7-5.25 V digital I/O range interfacing directly to 3.3 V microcontrollers or FPGAs. Designers gain deterministic latency that simplifies closed-loop PID control timing, eliminates pipeline-delay compensation, and supports multiplexing of 8 to 16 input channels via an external analog switch.
Recomendado
Medical Monitoring Equipment
The ADS8371IPFBR suits portable medical monitoring equipment including patient monitors, ECG, pulse oximetry, and infusion pumps because of its 16-bit resolution, 750 kSPS sample rate, and low micro-power dissipation. The converter digitizes low-frequency bioelectric signals (typically 0.05-150 Hz) with sufficient dynamic range for diagnostic-grade waveforms, while the auto power-down between conversions keeps battery drain low for ambulatory use. The deterministic SAR latency also simplifies real-time waveform analysis such as QRS detection and SpO2 calculation, and the 48-TQFP package fits compact handheld form factors with thermal-pad PCB mounting for reliable operation at body temperature.
Recomendado
Precision Portable Instrumentation
The ADS8371IPFBR fits precision portable instrumentation such as handheld multimeters, oscilloscopes, and bench-top signal analyzers because of its 750 kSPS sample rate, 16-bit DC accuracy, and external reference flexibility. The converter captures waveform snapshots at the full bandwidth needed for 1 MHz-class oscilloscope channels while delivering the DC accuracy required for 6.5-digit DMM digitizing circuits, and the parallel interface streams data into an FPGA-based display pipeline without bus contention. The wide -40 to +85 °C operating range also supports field-deployed test equipment used in extreme environments from Arctic to desert conditions.
Recomendado
Optical Networking Power Monitoring
The ADS8371IPFBR is well suited for optical-networking power monitoring in DWDM and ROADM line cards where optical power and gain must be digitized for feedback to automatic gain control loops. The 750 kSPS throughput supports multi-channel tap-monitor photodiode digitization with the 16-bit dynamic range covering the full -40 to +10 dBm optical input range. The deterministic SAR latency is essential because optical AGC loops cannot tolerate pipeline delay, and the parallel interface integrates directly into the line-card FPGA fabric. The micro-power dissipation also benefits high-density line cards with hundreds of converters per chassis.
Recomendado
High-Speed Closed-Loop Servo Control
The ADS8371IPFBR enables high-speed closed-loop servo control in robotics, CNC machines, and motor drives because of its 750 kSPS throughput and deterministic SAR latency. Position, velocity, and current feedback from encoders and Hall-effect sensors are digitized into the servo loop on every conversion cycle without pipeline-delay compensation, simplifying firmware and improving loop bandwidth. The 16-bit resolution is sufficient for sub-arc-minute positioning accuracy in precision stages, and the wide digital supply range interfaces directly to 3.3 V motor-control MCUs and DSPs without level shifters.
Recomendado
Power Supply Telemetry & Protection
The ADS8371IPFBR can digitize voltage and current telemetry rails in high-end telecom, server, and industrial power supplies for over-current, over-voltage, and over-temperature protection loops. The 750 kSPS throughput supports per-cycle current monitoring of multi-phase VRM controllers and buck-boost converters operating at 100 kHz+ switching frequencies, while the 16-bit resolution captures the full dynamic range from no-load standby to peak load. The parallel interface delivers data to the housekeeping MCU with deterministic latency so protection thresholds trip within one PWM cycle, improving system reliability.
Recomendado
Audio Test & Measurement
The ADS8371IPFBR can serve in audio-band test and measurement equipment such as audio analyzers, signal generators, and acoustic monitoring systems. Its 16-bit resolution and 750 kSPS sample rate capture the full audio bandwidth (20 Hz to 20 kHz with significant oversampling) while preserving harmonic detail for THD+N measurements. The deterministic SAR latency simplifies cross-channel phase measurements used in crosstalk and acoustic-impedance tests, and the parallel interface streams data into a DSP for FFT analysis. The wide operating temperature range also supports field-deployed acoustic test gear in outdoor and industrial environments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADS8371IPFBR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADS8371IPFBT | ADS8371IPFBRG4 | ADS8371IPFBTG4 | ADS8372IPFBR | ADS8381IPFBR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| 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 |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 18 bits | 18 bits |
| Sample Rate | 750 kSPS | 750 kSPS | 750 kSPS | 750 kSPS | 750 kSPS | 500 kSPS |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Reference Type | External | External | External | External | External | External |
| Data Interface | Parallel 16-bit | Parallel 16-bit | Parallel 16-bit | Parallel 16-bit | Parallel 18-bit | Parallel 18-bit |
| Analog Supply | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Digital I/O Supply | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| 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 |
Diferenciadores clave
- 16-bit no-missing-codes SAR core at 750 kSPS with deterministic single-cycle latency (frente a ADS8372IPFBR)
- Wide 2.7 V to 5.25 V digital I/O range interfaces directly to 3.3 V MCUs without level shifters (frente a ADS8381IPFBR)
- Industry-standard parallel interface with BYTE-mode support for 8-bit hosts (frente a ADS8371IPFBRG4)
Notas de diseño
Place the input RC anti-alias filter network, decoupling capacitors (10 uF + 0.1 uF ceramic on AVDD and DVDD), and reference bypass capacitors (10 uF + 0.1 uF on REF) within 5 mm of the respective ADS8371 pins. Route digital data bus traces away from analog input traces, and stitch the analog and digital ground planes together only at a single point under the AGND/DGND pins to avoid ground-loop noise coupling into the 16-bit conversion result.
Do not float the BYTE pin - tie it to DGND for full 16-bit parallel mode or to DVDD for 8-bit byte mode, otherwise the converter may latch undefined bus states. The IN- input must be tied to AGND for unipolar single-ended operation; leaving it floating introduces common-mode offset that degrades INL by several LSB. The REF pin requires a low-impedance reference source such as the TI REF5040 with its 10 uF + 0.1 uF bypass network, otherwise reference noise couples directly into the conversion result.
The 16-bit parallel bus should be series-terminated with 33 ohm resistors near the ADC outputs when driving capacitive bus loads above 20 pF (typical for FPGA or MCU buses). The CONVST and BUSY signals must be routed with matched-length traces to ensure deterministic conversion timing; a series damping resistor of 47 ohm on CONVST reduces ringing on long PCB traces. When reading the ADC, observe the tDBD bus-access time (typically 25 ns) before latching data; violating this timing introduces incorrect code reads at 750 kSPS throughput.
The ADS8371 dissipates approximately 100 mW at 750 kSPS with a 5 V analog supply. The 48-TQFP (PFB) thermal pad must be soldered to a PCB thermal land with at least 9 thermal vias to the inner ground plane to keep theta-JA below 35 °C/W. In enclosed housings or ambient temperatures above 60 °C, this thermal land is mandatory; otherwise junction temperature can exceed the 150 °C absolute maximum and trigger thermal shutdown.
Información de cumplimiento
RoHS and REACH compliant per Texas Instruments product page. Lead-free (PBF) finish; G4 finish revision available (ADS8371IPFBRG4). Not AEC-Q100 qualified - choose an automotive-grade alternative for vehicle applications.
