AD7475ARM-REEL7 - 12-bit 1MSPS SAR ADC | Analog Devices
N.º de pieza: AD7475ARM-REEL7 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $5.62 | $5,62 |
| 10 | $5.04 | $50,40 |
| 100 | $4.49 | $449,00 |
| 500 | $4.04 | $2.020,00 |
| 1.000 | $3.59 | $3.590,00 |
AD7475ARM-REEL7 Descripción general
A SAR ADC is a successive-approximation architecture that converts an analog input to a digital code through a binary-search algorithm using an internal DAC and comparator, achieving an excellent balance of speed, accuracy and power efficiency. SAR ADCs sit within the broader category of data converters (ADC/DAC) and are widely preferred for multiplexed channel acquisition, motor control feedback loops, and precision instrumentation where low latency and deterministic sampling are required. The AD7475 family (AD7475/AD7495) occupies the lower-power, high-speed segment of the SAR market, targeting portable, industrial and process-control designs.
Key specifications include 12-bit resolution with no missing codes, 1 MSPS throughput, 4.5 mW typical power dissipation at 1 MSPS with 3V supply (10.5 mW at 5V), and a flexible VDRIVE function that sets the serial-interface logic level independently of the analog supply. The high-bandwidth track-and-hold amplifier handles input frequencies well above the Nyquist limit, supporting undersampling and accurate acquisition of fast transients. The serial interface can be configured for 3-wire or 4-wire SPI/MICROWIRE/QSPI/DSP operation, simplifying integration across a broad range of host platforms.
Typical applications include battery-powered instrumentation, data acquisition systems, motor control feedback, portable medical devices and industrial process control. The wide 2.7V to 5.25V supply range and low power dissipation make the AD7475ARM-REEL7 particularly attractive for remote, battery-powered sensor nodes where energy budget is critical. When designing with the AD7475, provide a low-impedance external reference (such as the AD780 or ADR02) for full 12-bit performance, and keep digital and analog ground returns separated with a single-point join to preserve noise immunity.
Alternativas directas para AD7475ARM-REEL7 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AD7475ARMZ-REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7475ARM-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7475ARM
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7495BRMZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7476ARMZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD7475ARM-REEL7 Valores máximos y características eléctricas
| Number of Bits | 12 |
| Sampling Rate (Throughput) | 1 MSPS |
| Architecture | SAR (Successive-Approximation Register) |
| Number of Channels | 1 |
| Input Type | Single-Ended |
| Supply Voltage (VDD) | 2.7 V to 5.25 V |
| Tensión de referencia | 2.5 V (external, applied to REF IN) |
| Power Dissipation (typ @ 1 MSPS, 3 V) | 4.5 mW |
| Power Dissipation (max @ 1 MSPS, 3 V) | 10.5 mW |
| Data Interface | DSP, MICROWIRE, QSPI, Serial, SPI |
| Track-and-Hold Input Bandwidth | > 1 MHz |
| VDRIVE Function | Yes (independent logic-level supply) |
| Encapsulado / Carcasa | 8-MSOP (RM-8) 3.00 mm |
| Packaging | Tape & Reel (7-inch reel) |
| Estado RoHS | Compliant |
Configuración de pines de AD7475ARM-REEL7
| Pin 1 | VDD — Analog supply voltage, 2.7V to 5.25V |
| Pin 2 | REF IN — External 2.5V reference input |
| Pin 3 | AIN — Analog input (single-ended, 0V to VREF range) |
| Pin 4 | GND — Ground (analog and digital star ground) |
| Pin 5 | VDRIVE — Logic supply for serial interface (sets DOUT/slew logic level) |
| Pin 6 | CS — Chip select, active-low (enables serial interface) |
| Pin 7 | DOUT — Serial data output (SPI/MICROWIRE/QSPI/DSP compatible) |
| Pin 8 | SCLK — Serial clock input |
Aplicaciones típicas
AD7475ARM-REEL7 es adecuado para 6 aplicacións: Battery-Powered Instrumentation, Multiplexed Data Acquisition Systems, Motor Control Feedback Loops, Portable Medical Devices, Industrial Process Control, Sensor Interface & IoT Edge Nodes.
Battery-Powered Instrumentation
The AD7475ARM-REEL7's 4.5 mW typical power dissipation at 1 MSPS with a 3V supply makes it ideal for handheld multimeters, portable oscilloscope channels, and field data loggers where battery life is critical. The 2.7V to 5.25V single-supply range allows direct connection to Li-ion, two-AA and USB rails. The VDRIVE pin sets the digital I/O swing independently so the part can interface with low-power microcontrollers (MSP430, STM32L) without level shifters. Compared to higher-speed ADCs that consume 50-100 mW, the AD7475ARM-REEL7 enables continuous 1 MSPS sampling without significantly draining the battery budget.
Recomendado
Multiplexed Data Acquisition Systems
The AD7475ARM-REEL7's 1 MSPS throughput and low-latency SAR architecture suit it to multiplexed multi-channel DAQ systems where channels must be sampled sequentially through an external analog multiplexer. The wide-bandwidth track-and-hold amplifier handles input frequencies well above the Nyquist limit, preserving signal integrity for fast transient capture. The serial SPI/MICROWIRE/QSPI output minimises pin count, freeing board space for additional channels. Pair the ADC with an ADG1406 or ADG706 mux and an ADR02 reference to build a 16-channel 12-bit DAQ module running at one conversion per microsecond.
Recomendado
Motor Control Feedback Loops
The AD7475ARM-REEL7's deterministic 1 MSPS SAR conversion provides the low-latency, deterministic-sampling characteristic that BLDC and PMSM motor-control loops require to sample phase current, position sensor outputs and DC-bus voltage. The 12-bit resolution is sufficient for current-loop control of industrial drives up to several hundred watts. The MSOP-8 footprint and low power dissipation allow placement on compact motor-control PCBs near the power stage without thermal concerns. Use the AD7475ARM-REEL7 with an AD8628 op-amp front end and an isolated SPI interface for high-side current sensing in industrial servo drives.
Recomendado
Portable Medical Devices
The AD7475ARM-REEL7's 12-bit resolution, 1 MSPS sampling rate and 4.5 mW power dissipation make it well suited to portable patient-monitoring devices such as pulse oximeters, ECG patch monitors and digital stethoscopes. The wide 2.7V-5.25V supply range accommodates single-cell Li-ion batteries and USB-rechargeable topologies. The serial SPI interface connects directly to low-power microcontrollers like the MAX32630 or STM32L4. For medical applications, the VDRIVE pin lets the ADC run from a low-voltage digital rail while maintaining a clean analog supply, minimising digital switching noise coupled into sensitive bio-signal acquisition channels.
Recomendado
Industrial Process Control
The AD7475ARM-REEL7's -40°C to +85°C industrial temperature range and 12-bit resolution make it appropriate for 4-20 mA loop-powered process transmitters, programmable logic controllers (PLCs), and SCADA analog input modules. The 1 MSPS sampling rate is overkill for slow thermocouple/RTD signals but provides ample headroom for vibration and pressure transducer monitoring in predictive-maintenance systems. The serial interface and small MSOP-8 footprint simplify PCB layout in 16-32 channel analog input cards. Use a TVS protection network such as the ADG5404 at the input to provide IEC 61000-4-2/4-4 ESD and surge immunity for industrial environments.
Recomendado
Sensor Interface & IoT Edge Nodes
The AD7475ARM-REEL7's low power dissipation, compact MSOP-8 package and simple SPI interface make it ideal for IoT edge nodes that digitise analog sensor outputs (temperature, pressure, strain gauges) before wireless transmission. The 1 MSPS throughput supports oversampling techniques that effectively improve resolution beyond 12 bits when the signal bandwidth is well below Nyquist. The 2.7V-5.25V supply range accommodates battery, USB and energy-harvesting power sources. Pair the ADC with a low-power wireless MCU such as the ADI MAX32660 or ADuCM3029 for remote sensor nodes with years of battery life.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD7475ARM-REEL7 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AD7475ARMZ-REEL7 | AD7475ARM-REEL | AD7475ARM | AD7495BRMZ | AD7476ARMZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 8-MSOP (RM-8) | 8-MSOP (RM-8) - same | 8-MSOP (RM-8) - same | 8-MSOP (RM-8) - same | 8-MSOP (RM-8) - same | 8-MSOP (RM-8) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Throughput | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Reference Voltage | 2.5V external | 2.5V external | 2.5V external | 2.5V external | 2.5V internal | 2.5V external |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Packaging | Tape & Reel (7-inch) | Tape & Reel (7-inch) | Tape & Reel (13-inch) | Tube | Tape & Reel | Tape & Reel |
Diferenciadores clave
- VDRIVE independent logic-level supply (frente a AD7466BRT)
- Wide-bandwidth track-and-hold (>1 MHz) (frente a AD7476ARMZ)
- Same-brand drop-in family (AD7475ARM/ARMZ/REEL variants) (frente a Cross-brand MSOP-8 ADCs (e.g. MAX11102))
Notas de diseño
Decouple VDD with a 10uF tantalum or ceramic bulk capacitor close to the IC pin, plus a 0.1uF ceramic capacitor for high-frequency decoupling. Decouple VDRIVE with a 0.1uF ceramic capacitor directly at pin 5 to stabilise the logic-level supply. Avoid sharing the VDRIVE trace with high-current digital signals to prevent logic-level corruption during SPI transitions.
Separate analog and digital ground planes using a star-ground or split-plane topology, joining them at a single point close to the AD7475ARM-REEL7 GND pin (pin 4). Route the analog input (AIN) trace as a microstrip or stripline with a continuous ground reference underneath, and avoid running digital traces parallel to AIN. Place the external 2.5V reference (AD780/ADR02) within 10 mm of the REF IN pin to minimise noise pickup.
Buffer the analog input with a low-noise op-amp such as AD8628 or AD8642 to achieve the 1 MSPS settling time required for full 12-bit accuracy. Source impedance should be kept below 1 kohm to prevent droop in the internal track-and-hold capacitor during the acquisition phase. For multiplexed applications, allow at least 200 ns settling time after switching the input mux before triggering a conversion.
Do not exceed 5.25V on VDD or VDRIVE; ESD on the analog input pin can permanently damage the device - add a TVS protection diode such as SMAJ5.0CA on the input for industrial applications. Verify the external 2.5V reference stability; a noisy reference directly translates to ADC noise floor. Do not leave REF IN floating or the part will not produce valid conversion results.
Información de cumplimiento
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified - not recommended for automotive safety-critical applications without further qualification.
