AD7475ARM-REEL7 - 12-bit 1MSPS SAR ADC | Analog Devices
Teilenummer: AD7475ARM-REEL7 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 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 Übersicht
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.
Drop-in-Alternativen für AD7475ARM-REEL7 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AD7475ARMZ-REEL7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7475ARM-REEL
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7475ARM
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7495BRMZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7476ARMZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7475ARM-REEL7 Grenzwerte & elektrische Eigenschaften
| 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 |
| Referenzspannung | 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) |
| Gehäuse / Bauform | 8-MSOP (RM-8) 3.00 mm |
| Packaging | Tape & Reel (7-inch reel) |
| RoHS-Status | Compliant |
AD7475ARM-REEL7 Pin-Konfiguration
| 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 |
Typische Anwendungen
AD7475ARM-REEL7 ist geeignet für 6 Anwendungs: 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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AD7475ARM-REEL7 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 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 |
Wichtigste Unterscheidungsmerkmale
- VDRIVE independent logic-level supply (vs. AD7466BRT)
- Wide-bandwidth track-and-hold (>1 MHz) (vs. AD7476ARMZ)
- Same-brand drop-in family (AD7475ARM/ARMZ/REEL variants) (vs. Cross-brand MSOP-8 ADCs (e.g. MAX11102))
Designhinweise
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.
Compliance-Informationen
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified - not recommended for automotive safety-critical applications without further qualification.
