ADS8568SPMR - 16-Bit 8-Ch Simultaneous-Sampling SAR ADC | TI
N.º de pieza: ADS8568SPMR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $22.96 | $22,96 |
| 10 | $21.1 | $211,00 |
| 100 | $19.05 | $1.905,00 |
| 500 | $17.25 | $8.625,00 |
| 1.000 | $15.8 | $15.800,00 |
ADS8568SPMR Descripción general
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes, serving as the bridge between the analog physical world and the digital processing domain. SAR ADCs use a binary search algorithm implemented with a capacitive DAC and comparator to achieve a deterministic conversion time of one clock cycle per code bit, offering an attractive balance of speed, resolution, and power consumption compared to delta-sigma or pipeline architectures. Simultaneous-sampling ADCs like the ADS8568SPMR integrate eight independent sample-and-hold amplifiers that capture all eight input channels at exactly the same instant, which is essential for phase-coherent multi-phase measurements in power, motor control, and instrumentation systems.
Key features of the ADS8568SPMR include software-configurable input ranges of +/-10 V or +/-5 V (true bipolar), on-chip sequencer, low power consumption, and pin- and software-compatibility with the 12-bit ADS8528 and 14-bit ADS8548 family members, allowing engineers to migrate designs across resolution grades without PCB changes. The integrated analog input clamp protection and second-order anti-aliasing filter simplify front-end design.
Typical applications include three-phase power-line monitoring and protection relays, multi-axis motor control, simultaneous data acquisition (DAQ) systems, instrumentation and medical imaging, and industrial process control. The 64-LQFP (PMR) package supports standard surface-mount reflow assembly and provides sufficient thermal mass for industrial temperature operation.
When designing with the ADS8568SPMR, pay attention to analog input common-mode and bypass capacitor placement, and verify that the throughput rate is supported in either parallel or serial mode per your MCU/FPGA interface constraints. The bipolar input range eliminates the need for external signal conditioning in most +/-10 V industrial applications.
Alternativas directas para ADS8568SPMR — 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 ADS8568SPMR (mismo factor de forma y huella) — difiere en Operating Temperature Range, Package, Number of Channels, Resolution, Analog Input Impedance.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADS8568SPM
✅ Sustitución directa✓ En stock
$17.1 / unidad
Ver hoja de datos →ADS8548SPMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8528SPMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8556IPMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADS8556IPM
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AD7606BSTZ-4
✅ Sustitución directa✓ En stock
$11.6 / unidad
Ver hoja de datos →ADS8568SPMR Valores máximos y características eléctricas
| Resolución | 16 bits |
| Number of Channels | 8 |
| Sampling Type | Simultaneous Sampling |
| ADC Architecture | SAR (Successive Approximation Register) |
| Maximum Data Rate (Parallel Mode) | 510 kSPS per channel |
| Maximum Data Rate (Serial Mode) | 400 kSPS per channel |
| Input Range | +/-10 V or +/-5 V (software configurable, bipolar) |
| Signal-to-Noise Ratio (SNR) | 91.5 dB |
| Total Harmonic Distortion (THD) | -94 dB typical |
| Interfaz | Parallel (PAR) or Serial (SER) |
| Input Type | Bipolar, single-ended |
| Analog Input Protection | On-chip analog input clamp |
| Anti-Aliasing Filter | Second-order, integrated |
| Encapsulado | 64-pin LQFP (PMR), 10x10 mm |
| Tipo de montaje | Surface Mount |
| Rango de temperatura de funcionamiento | -40C to +125C (industrial) |
| Estado RoHS | Compliant |
Guía de configuración de pines de ADS8568SPMR 64-pin lqfp (pmr), 10x10 mm
Configuración de pines para ADS8568SPMR (encapsulado 64-pin lqfp (pmr), 10x10 mm). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para ADS8568SPMR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ADS8568SPMR es adecuado para 6 aplicacións: Three-Phase Power Line Monitoring, Multi-Axis Motor Control and Drive, Simultaneous Data Acquisition Systems (DAQ), Medical Imaging and Instrumentation, Industrial Process Control and PLCs, Energy Storage and Battery Management Systems.
Three-Phase Power Line Monitoring
The ADS8568SPMR is engineered for three-phase power quality analyzers and protection relays where simultaneous sampling of voltage and current waveforms is mandatory for accurate phasor and harmonic analysis. Its eight simultaneous-sampling channels capture three phase voltages plus three phase currents plus neutral voltage and current in a single acquisition cycle, eliminating inter-channel skew that would otherwise corrupt harmonic calculations. The +/-10 V or +/-5 V software-configurable bipolar input range directly accepts the output of standard 4-20 mA current shunts and potential transformer secondaries without external signal conditioning, and the 91.5 dB SNR plus -94 dB THD support IEC 61000-4-7 harmonic measurement accuracy classes. Per TI datasheet, the on-chip analog input clamps tolerate transients up to +/-25 V, providing robust protection against inductive load switching spikes in industrial switchgear.
Recomendado
Multi-Axis Motor Control and Drive
Multi-axis servo drives and industrial motor controllers rely on the ADS8568SPMR to simultaneously sample phase currents, DC bus voltage, and analog feedback signals from multiple axes at the same instant. With eight input channels sampled within a single conversion cycle at 510 kSPS per channel, the ADC enables field-oriented control (FOC) loops with deterministic sample-to-update latency that is critical for stable current control at high PWM frequencies. The 16-bit resolution captures low-side current shunt signals across +/-10 V input range with sub-LSB precision, while the integrated second-order anti-aliasing filter removes the need for external op-amp filter stages. Per TI ADS85x8 datasheet, the part supports industrial -40C to +125C operation and integrates robust analog input clamps, making it ideal for the harsh electrical environment of variable-frequency drives.
Recomendado
Simultaneous Data Acquisition Systems (DAQ)
The ADS8568SPMR is a cornerstone of multi-channel data acquisition (DAQ) systems used in vibration analysis, acoustic measurement, and structural health monitoring where phase coherence between channels is essential. Each of the eight SAR ADCs is driven by its own sample-and-hold amplifier, capturing all input channels on the same CONVST edge with zero inter-channel skew, then sequentially outputting 16-bit conversion results through either parallel or serial interface at up to 4.08 MSPS aggregate throughput. The 91.5 dB SNR and -94 dB THD enable capture of low-amplitude signals such as accelerometer outputs without sacrificing dynamic range. Per TI datasheet, the integrated analog input clamps and on-chip reference simplify front-end design, allowing 8-channel DAQ cards to be implemented with minimal external component count.
Recomendado
Medical Imaging and Instrumentation
Medical diagnostic instruments such as patient monitoring systems, multi-lead ECG recorders, and ultrasound beamforming front-ends leverage the ADS8568SPMR's eight simultaneous-sampling channels to capture physiological signals with precise temporal alignment. The 16-bit resolution captures sub-millivolt biopotential signals amplified to the +/-5 V input range with sufficient dynamic range to handle both baseline wander and R-wave peaks without saturation. The 510 kSPS per channel throughput supports 12-lead ECG systems where multiple leads are sampled in parallel for accurate vectorcardiogram analysis. Per TI datasheet, the device's bipolar input architecture accommodates single-supply front-end designs while its integrated anti-aliasing filter prevents out-of-band noise from aliasing into the diagnostic signal band.
Recomendado
Industrial Process Control and PLCs
Process control programmable logic controllers (PLCs) and distributed control systems (DCS) require multi-channel, high-precision analog input modules that can digitize 4-20 mA current loops and +/-10 V voltage signals simultaneously from multiple field sensors. The ADS8568SPMR fits this application with its eight simultaneous-sampling 16-bit channels that accept the industry-standard +/-10 V or +/-5 V bipolar inputs directly, eliminating external signal conditioning. The 510 kSPS per channel throughput in parallel mode supports high-speed process variables such as flow, pressure, and temperature loop digitization at millisecond update rates, while the integrated anti-aliasing filter and reference simplify IEC 61131-2 compliant analog input module design. Per TI datasheet, industrial -40C to +125C operation and integrated transient protection suit the harsh factory floor environment.
Recomendado
Energy Storage and Battery Management Systems
Battery management systems (BMS) for grid-scale energy storage, electric vehicles, and renewable inverter systems use the ADS8568SPMR to simultaneously sample cell voltages, current sense outputs, and temperature signals from multiple battery modules. The eight simultaneous-sampling channels allow monitoring of an entire battery stack without time-skew error that would compromise state-of-charge (SOC) and state-of-health (SOH) calculations. The 16-bit resolution over the +/-10 V input range captures high-side current shunt and individual cell voltages with sub-millivolt precision, supporting accurate coulomb counting and cell balancing. Per TI datasheet, the bipolar input range with software-configurable scaling allows direct interface with both low-voltage cell monitoring and high-voltage DC bus measurement, simplifying the BMS analog front end.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADS8568SPMR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADS8568SPM | ADS8548SPMR | ADS8528SPMR | ADS8556IPMR | AD7606BSTZ-4 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (PMR), 10x10 mm | 64-LQFP (PM), 10x10 mm - same footprint | 64-LQFP (PMR), 10x10 mm - same footprint | 64-LQFP (PMR), 10x10 mm - same footprint | 64-LQFP (PMR) - same footprint | 64-LQFP (BSTZ), 10x10 mm - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 16 bits | 16 bits | 14 bits | 12 bits | 16 bits | 16 bits |
| Number of Channels | 8 | 8 | 8 | 8 | 6 | 8 |
| Sampling Type | Simultaneous | Simultaneous | Simultaneous | Simultaneous | Simultaneous | Simultaneous |
| Input Range | +/-10 V or +/-5 V bipolar | +/-10 V or +/-5 V bipolar | +/-10 V or +/-5 V bipolar | +/-10 V or +/-5 V bipolar | +/-10 V or +/-5 V bipolar | +/-10 V or +/-5 V bipolar |
| Interface | Parallel or Serial | Parallel or Serial | Parallel or Serial | Parallel or Serial | Parallel or Serial | Parallel or Serial |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C |
Diferenciadores clave
- Highest resolution in the ADS85x8 pin-compatible family (frente a ADS8548SPMR)
- More simultaneous channels than ADS8556 (frente a ADS8556IPMR)
- Wider operating temperature range than ADI cross-brand equivalent (frente a AD7606BSTZ-4)
Notas de diseño
Place the 10 uF bulk and 100 nF ceramic decoupling capacitors as close as possible to the AVDD and DVDD pins of the ADS8568SPMR. Per TI datasheet recommendations, use a star-ground topology with separate analog (AVSS) and digital ground returns tied at a single point near the ADC. The exposed thermal pad of the LQFP-64 package should be soldered to a ground-connected copper pour of at least 1 square inch to provide mechanical stability and thermal dissipation.
The ADS8568SPMR's integrated second-order anti-aliasing filter simplifies front-end design but engineers must verify that the filter cutoff frequency (approximately 100 kHz per TI datasheet) is well below half the conversion rate to prevent aliasing of out-of-band noise. For applications where CONVST frequency exceeds 200 kSPS, add an external RC low-pass filter before each analog input to provide additional anti-aliasing. Keep analog input traces short and symmetric, and use a guard trace tied to AVSS between channels to minimize crosstalk.
Do not apply input signals exceeding +/-25 V to the analog inputs, even though the ADS8568SPMR includes on-chip clamps - sustained overvoltage can damage the clamping diodes. Ensure that the BUSY signal is properly monitored in firmware to avoid reading stale conversion data; per TI datasheet, the BUSY pin goes high at the start of conversion and falls when data is ready. In parallel mode, the host MCU or FPGA must latch the parallel data bus within the access time specified in the timing diagram - failure to do so yields misaligned channel data.
Información de cumplimiento
RoHS and REACH compliant per TI product page. PMR suffix indicates industrial temperature grade -40C to +125C; not AEC-Q100 automotive qualified.
