AD7680BRMZ-REEL - 16-Bit 100kSPS SAR ADC | Analog Devices
Teilenummer: AD7680BRMZ-REEL ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $9.85 | $9,85 |
| 10 | $8.9 | $89,00 |
| 100 | $7.45 | $745,00 |
| 500 | $6.55 | $3.275,00 |
| 1.000 | $5.8 | $5.800,00 |
| 3.000 | $5.2 | $15.600,00 |
AD7680BRMZ-REEL Übersicht
A SAR ADC is a converter architecture that performs a binary search through an internal capacitor DAC and comparator network to resolve the input voltage in N clock cycles for an N-bit result. Compared with delta-sigma and pipeline architectures, SAR ADCs combine true 16-bit no-latency sampling with low power consumption, which is why they dominate battery-powered instrumentation, data acquisition modules, and process-control front-ends. Within the converter hierarchy, the AD7680 occupies the SAR -> precision ADC -> data converter -> signal chain IC position.
Key features of the AD7680 family include a wide-bandwidth, low-noise track-and-hold front end that handles input frequencies well in excess of the Nyquist rate, an internal conversion clock that eliminates the need for an external crystal, a high-speed serial interface compatible with SPI/QSPI/MICROWIRE/DSP, and a power-down mode that reduces consumption to nanowatt levels between conversions. The 8-MSOP exposed-pad package keeps the PCB footprint under 15 mm² while providing a thermal path to the ground plane.
The device architecture pairs the SAR core with a precision reference input, allowing the system designer to use any low-drift external reference from 2.5 V to 5.5 V (including the ADR45xx family) to set the conversion scale. The serial output streams MSB-first, simplifying firmware on most microcontrollers. The part is specified over the −40 °C to +85 °C industrial temperature range.
Typical applications include portable and battery-powered instrumentation, transducer/sensor signal conditioning, data acquisition systems, and process control loops where the combination of true 16-bit resolution, 100 kSPS throughput, and 3 mW dissipation is decisive. Designers appreciate the lack of pipeline latency, which simplifies single-shot and multiplexed front-end designs.
When laying out the PCB, place the 0.1 µF decoupling capacitor as close as possible to the VDD pin and tie the exposed pad to a clean analog ground plane to minimize digital-coupling noise. Choosing an external reference with low broadband noise (such as ADR4525) preserves the ADC's effective resolution at very low input amplitudes.
This page consolidates distributor pricing, drop-in 8-MSOP alternatives, and practical design notes for engineers evaluating the AD7680BRMZ-REEL against newer or competing ADC solutions.
Drop-in-Alternativen für AD7680BRMZ-REEL – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit AD7680BRMZ-REEL (gleiche Bauform und Footprint) – abweichend in Operating Temperature Range, Package, Supply Voltage (VDD), Architecture, MSL Level.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AD7680BRM-REEL7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7680ARMZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7680BRMZ
📋 Referenzalternative (nicht im Katalog)
AD7680ARM-REEL7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7680BRMZ-REEL Grenzwerte & elektrische Eigenschaften
| Architecture | SAR (Successive Approximation) |
| Auflösung | 16 bits |
| Number of Channels | 1 input |
| Throughput Rate | 100 kSPS |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| Power Consumption | 3 mW typical at 100 kSPS, 5 V |
| Analog Input Type | Pseudo-differential (unipolar, 0 V to VREF) |
| Reference Input (VREF) | 2.5 V to 5.5 V external |
| INL (Integral Non-Linearity) | ±2 LSB max (B-grade) |
| DNL (Differential Non-Linearity) | ±1 LSB max, no missing codes |
| Track-and-Hold Bandwidth | Wide bandwidth, handles >Nyquist input frequencies |
| Digital Interface | Serial SPI/QSPI/MICROWIRE/DSP-compatible |
| Betriebstemperaturbereich | −40 °C to +85 °C |
| Gehäuse | 8-pin MSOP with exposed pad (RM-8) |
| Montageart | Surface Mount |
| MSL-Level | MSL 1 (Unlimited) per ADI product info |
| Lead-Free / RoHS | RoHS3 Compliant (REACH Unaffected) |
| Conversion Latency | 0 clock cycles (true SAR, no pipeline delay) |
AD7680BRMZ-REEL Pin-Konfiguration
| Pin 1 | VDD — Power supply (2.5 V to 5.5 V) |
| Pin 2 | IN+ — Analog positive input (true differential or pseudo-differential) |
| Pin 3 | IN− — Analog negative input (typically tied to GND for pseudo-differential) |
| Pin 4 | GND — Analog ground |
| Pin 5 | REF — Reference input (2.5 V to 5.5 V external reference) |
| Pin 6 | SCK — Serial clock input (SPI/QSPI/MICROWIRE compatible) |
| Pin 7 | SDOUT — Serial data output (MSB-first) |
| Pin 8 | CNVST — Conversion start input (active low) |
| Pin EP | Exposed Pad — Must be soldered to analog ground plane for thermal dissipation |
Typische Anwendungen
AD7680BRMZ-REEL ist geeignet für 7 Anwendungs: Battery-Powered Portable Instrumentation, Industrial Process Control and 4-20 mA Loops, Precision Data Acquisition Systems, Sensor Signal Conditioning and Transducer Read-Out, Medical Monitoring and Diagnostic Equipment, Automotive Sensor Interfaces (Non-Safety-Critical), Audio and Communication Test Equipment.
Battery-Powered Portable Instrumentation
The AD7680BRMZ-REEL's 3 mW typical dissipation at 100 kSPS and single 2.5–5.5 V supply make it ideal for handheld multimeters, portable data loggers, and field sensors running from two AA cells or a Li-Ion pack. The pseudo-differential 0-V-to-VREF input directly digitizes single-ended bridge sensors (strain gauges, pressure cells) when paired with a low-drift reference such as ADR4525. Because power scales linearly with throughput, an MCU-gated duty-cycled conversion scheme can drop average current to a few hundred microamps at 1 Hz update rates, giving months of life from small batteries. No pipeline latency also simplifies single-shot triggering in sleeping systems.
Empfohlen
Industrial Process Control and 4-20 mA Loops
In factory automation, the AD7680BRMZ-REEL serves as the A/D front-end for PLC analog input modules that digitize 4-20 mA current loops after a sense resistor. Its ±2 LSB INL (B-grade) translates to better than 0.01 %FS accuracy, comfortably handling 16-bit PLC resolution budgets. The wide 2.5–5.5 V supply works directly from a 24 V-to-5 V isolated bus, and the SPI interface connects cleanly to industrial MCUs or to the ADI Blackfin/PulSAR family of isolated measurement front-ends. The exposed pad on the MSOP-8 package ties to an analog ground island, suppressing ground-loop noise from the loop power supply.
Empfohlen
Precision Data Acquisition Systems
Multi-channel data acquisition cards benefit from the AD7680BRMZ-REEL's zero-latency SAR conversion, which avoids the wait states of pipeline ADCs and makes single-shot multiplexer scanning deterministic. Designers pair several AD7680s with a low-noise reference such as ADR435 and a precision front-end instrumentation amplifier (e.g. AD8421) to build 16-bit, 100 kSPS-per-channel acquisition systems. The small 8-MSOP footprint allows high channel density on a 4-layer acquisition board, while the exposed pad simplifies thermal management when many converters are clustered around hot analog front-ends.
Empfohlen
Sensor Signal Conditioning and Transducer Read-Out
Strain-gauge bridges, RTDs, thermocouples, and weigh-scale load cells produce millivolt-level signals that the AD7680BRMZ-REEL digitizes directly when paired with a low-noise pre-amplifier. The 16-bit resolution and ±2 LSB INL deliver better than 0.01 % measurement accuracy across −40 °C to +85 °C, sufficient for SCADA and weigh-scale applications. Reference ratio-metric operation (an RTD tied between VREF and GND with the bridge across them) cancels reference drift. The exposed pad isolates the converter from digital switching noise in sensor hubs where multiple ADCs and MCUs share one PCB.
Empfohlen
Medical Monitoring and Diagnostic Equipment
Patient monitoring equipment (blood-pressure cuffs, pulse oximeters, ECG front-ends) demands true 16-bit resolution at low power, which is precisely the AD7680BRMZ-REEL's sweet spot. The 3 mW dissipation keeps battery-powered monitoring devices within thermal budgets, while the SPI interface connects directly to low-power MCUs such as ADuCM302x or MAX32660C. The B-grade ±2 LSB INL preserves diagnostic accuracy at small signal amplitudes, and the exposed-pad MSOP-8 footprint is qualified for medical-grade PCB designs. Reference selection (ADR4550 ultra-low-noise) preserves SNR at the low signal amplitudes typical of bioelectric signals.
Empfohlen
Automotive Sensor Interfaces (Non-Safety-Critical)
While not AEC-Q100 qualified, the AD7680BRMZ-REEL is widely used in non-safety automotive subsystems - climate control modules, seat-position encoders, and battery-management sensor read-out - where its industrial −40 °C to +85 °C specification suffices. The MSOP-8 package saves board area in compact ECUs, and the wide supply range interfaces directly with 12 V-battery-derived rails after regulation. Designers appreciate the deterministic latency in multiplexed temperature measurements during active battery-balancing windows.
Empfohlen
Audio and Communication Test Equipment
Test & measurement equipment such as audio analyzers and base-station monitoring tools benefit from the AD7680BRMZ-REEL's 100 kSPS throughput and 16-bit resolution for digitizing audio-band signals and low-frequency modulated carriers. The pseudo-differential input structure with wide-bandwidth track-and-hold captures tones well above Nyquist, while the SPI serial output streams cleanly into DSP or FPGA post-processing. Low power simplifies dense PCBs with many parallel measurement channels, and the exposed pad simplifies thermal budgeting in enclosed chassis.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AD7680BRMZ-REEL – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AD7680BRM-REEL7 | AD7680ARMZ | AD7680BRMZ | AD7680ARM-REEL7 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | MSOP-8 with exposed pad (REEL) | MSOP-8 with exposed pad (REEL7) | MSOP-8 with exposed pad (tube) | MSOP-8 with exposed pad (tube) | MSOP-8 with exposed pad (REEL7) |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Throughput | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| INL (max) | ±2 LSB (B-grade) | ±2 LSB (B-grade) | ±4 LSB (A-grade) | ±2 LSB (B-grade) | ±4 LSB (A-grade) |
| Power (typical at 100 kSPS, 5 V) | 3 mW | 3 mW | 3 mW | 3 mW | 3 mW |
| 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 |
Wichtigste Unterscheidungsmerkmale
- True 16-bit no-missing-codes resolution in B-grade (vs. AD7680ARMZ (A-grade))
- Zero pipeline latency for deterministic single-shot conversion (vs. Delta-sigma or pipeline ADCs at similar throughput)
- Industry-standard SPI/QSPI/MICROWIRE/DSP-compatible interface (vs. Parallel-output ADCs in same speed class)
Designhinweise
Decouple the VDD pin with a low-ESR 0.1 µF ceramic capacitor placed within 5 mm of the pin, and add a 10 µF bulk capacitor nearby. Power supply rejection of the AD7680 degrades sharply above the passband of this decoupling network, so keep the loop area small. Connect the exposed pad to a clean analog ground plane directly under the IC to provide a low-impedance thermal and electrical return.
Use a quiet, low-drift external reference between 2.5 V and 5.5 V on the REF pin. Add a 10 µF tantalum or ceramic bypass close to the REF pin to minimize reference noise injection into the conversion. Estimated: noise contribution of a 5 µV RMS reference yields SNR degradation of about −3 dB at full-scale; choose ADR4525 or better for sub-millivolt low-noise designs.
Do not drive the IN− pin with active signals in pseudo-differential mode - tie it to analog ground for typical single-ended inputs to preserve full INL/DNL performance. Ensure that the CNVST signal has clean monotonic edges; ringing or glitches on CNVST directly cause bit errors. Verify SPI mode 0 timing (SCK idle low, MSB-first) on the host MCU or DSP, which matches the AD7680 default timing.
Although the AD7680 dissipates only 3 mW at full throughput, exposed-pad MSOP packages depend on the PCB thermal path to the analog ground plane. Estimated: without the exposed pad soldered, theta_JA exceeds 200 °C/W; with proper soldering to a 1-square-inch copper pour, theta_JA falls below 70 °C/W, more than adequate for the 3 mW dissipation in normal use.
Compliance-Informationen
Per PartGenie datasheet summary (2026-10-12) and ADI product info: ROHS3 Compliant, REACH Unaffected, MSL 1 (Unlimited). The AD7680 family is not AEC-Q100 qualified - for safety-critical automotive applications choose an AEC-Q100 grade device.
