AD7766-2BRUZ - 24-Bit 32kSPS ADC | Analog Devices
MPN: AD7766-2BRUZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
AD7766-2BRUZ Overview
An oversampled SAR ADC combines the benefits of a traditional SAR architecture with oversampling techniques to achieve high dynamic range and input bandwidth. Unlike delta-sigma ADCs, which use noise shaping and require digital filters, the AD7766-2 uses a successive approximation register with an oversampling ratio to reduce quantization noise and improve signal-to-noise ratio. This architecture provides a balance between resolution, speed, and power consumption, making it suitable for applications where both accuracy and efficiency are critical.
Key features of the AD7766-2BRUZ include a 24-bit resolution, 32 kSPS output data rate, 115.5 dB dynamic range, and a low power consumption of 8.5 mW. The device operates from a single 2.5 V supply (2.375 V to 2.625 V) and features a serial interface with MSB-first, twos complement output format. It also includes an internal oscillator option and a power-down mode for further power savings.
The AD7766-2BRUZ uses an oversampled SAR architecture that achieves high performance without the latency of delta-sigma converters. The device includes a precision reference and a track-and-hold amplifier, ensuring accurate conversion of input signals. The serial interface is SPI-compatible, allowing easy integration with microcontrollers and DSPs. The device also features a SYNC pin for synchronization in multi-channel systems.
Typical applications include vibration monitoring, industrial process control, medical instrumentation, and high-precision data acquisition systems. The high dynamic range and low power make it particularly suitable for battery-powered portable instruments and sensor interfaces.
When designing with the AD7766-2BRUZ, ensure a clean, low-noise power supply and proper decoupling to achieve the specified dynamic range. The reference input should be bypassed with a low-ESR capacitor, and the analog input should be driven with a low-impedance source to maintain accuracy.
Drop-in alternatives for AD7766-2BRUZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7766-2BRUZ (same form factor and footprint) — differing in Input Type, Package, Data Interface, Dynamic Range, Sampling Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7766-1BRUZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7766BRUZ
✅ Drop-In✓ In Stock
$8.1 / Unit
View Datasheet →AD7176-2BRUZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.5 / Unit
View Datasheet →LTC2378-16
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADS1271
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7766-2BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Output Data Rate | 32 kSPS |
| Dynamic Range | 115.5 dB |
| Power Consumption | 8.5 mW |
| Input Type | Differential |
| Supply Voltage | 2.375 V to 2.625 V |
| Reference Voltage | 5 V |
| Interface | Serial (SPI-compatible) |
| Output Format | MSB-first, twos complement |
| Package | 16-lead TSSOP |
| Operating Temperature Range | -40°C to +105°C |
| Number of Inputs | 1 |
| Architecture | Oversampled SAR |
| THD | -118 dB |
| Mounting Type | Surface Mount |
AD7766-2BRUZ Pin Configuration
| Pin 1 | VDD — Power supply (2.5V) |
| Pin 2 | GND — Ground |
| Pin 3 | REF+ — Positive reference input |
| Pin 4 | REF- — Negative reference input |
| Pin 5 | AIN+ — Positive analog input |
| Pin 6 | AIN- — Negative analog input |
| Pin 7 | MCLK — Master clock input |
| Pin 8 | SDO — Serial data output |
| Pin 9 | SDI — Serial data input (for daisy-chaining) |
| Pin 10 | SYNC — Synchronization input |
| Pin 11 | PD — Power-down control |
| Pin 12 | NC — No connect |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Typical Applications
AD7766-2BRUZ is suitable for 6 applications: Vibration Monitoring, Industrial Process Control, Medical Instrumentation, High-Precision Data Acquisition, Battery-Powered Portable Instruments, Sensor Interfaces.
Vibration Monitoring
The AD7766-2BRUZ is ideal for vibration monitoring systems due to its high dynamic range of 115.5 dB and low power consumption of 8.5 mW. It can accurately capture vibration signals from industrial machinery, enabling predictive maintenance. The 32 kSPS output rate is sufficient for most vibration frequencies, and the low power allows for battery-powered wireless sensors. The differential input rejects common-mode noise, ensuring clean signal acquisition in noisy industrial environments.
Recommended
Industrial Process Control
In industrial process control, the AD7766-2BRUZ provides high-resolution conversion of sensor signals such as temperature, pressure, and flow. Its 24-bit resolution and 115.5 dB dynamic range ensure precise measurement, while the 8.5 mW power consumption is suitable for loop-powered instruments. The serial interface simplifies integration with microcontrollers, and the wide operating temperature range (-40°C to +105°C) ensures reliability in harsh environments. The device's low power also reduces heat generation, improving system stability.
Recommended
Medical Instrumentation
The AD7766-2BRUZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its high dynamic range and low noise ensure accurate acquisition of biomedical signals like ECG and EEG. The low power consumption of 8.5 mW is critical for battery-powered portable devices. The compact 16-lead TSSOP package allows for miniaturized designs. The device's differential input helps reject interference from other medical electronics, ensuring clean signal capture.
Recommended
High-Precision Data Acquisition
For high-precision data acquisition systems, the AD7766-2BRUZ offers 24-bit resolution and 115.5 dB dynamic range, making it ideal for applications requiring accurate measurement of small signals. Its oversampled SAR architecture provides high accuracy without the latency of delta-sigma converters. The device's low power consumption enables multi-channel systems without excessive heat dissipation. The serial interface supports daisy-chaining for multiple channels, simplifying system design.
Recommended
Battery-Powered Portable Instruments
The AD7766-2BRUZ is ideal for battery-powered portable instruments due to its low power consumption of 8.5 mW. It enables long battery life while maintaining high resolution and dynamic range. The device operates from a 2.5 V supply, which is compatible with common battery voltages. The compact TSSOP package and serial interface make it easy to integrate into handheld devices. The power-down mode further extends battery life when the ADC is not in use.
Recommended
Sensor Interfaces
The AD7766-2BRUZ serves as a high-performance interface for various sensors, including temperature, pressure, and strain gauges. Its 24-bit resolution and high dynamic range ensure accurate digitization of sensor outputs. The differential input allows direct connection to bridge sensors, rejecting common-mode noise. The low power consumption is beneficial for sensor nodes in IoT applications. The serial interface simplifies connection to microcontrollers, and the device's small package fits compact sensor modules.
Recommended
Recommended Products Summary
Engineering reference data for AD7766-2BRUZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7766-1BRUZ | AD7766BRUZ | AD7176-2BRUZ |
|---|---|---|---|---|
| Package | 16-lead TSSOP | 16-lead TSSOP | 16-lead TSSOP | 16-lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Output Data Rate | 32 kSPS | 64 kSPS | 128 kSPS | 250 kSPS |
| Dynamic Range | 115.5 dB | 112.5 dB | 109.5 dB | 125 dB |
| Power Consumption | 8.5 mW | 10.5 mW | 15 mW | 18 mW |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 5 V |
| THD | -118 dB | -118 dB | -118 dB | -120 dB |
Key Differentiators
- Lowest power consumption in the AD7766 family (vs AD7766BRUZ)
- Higher dynamic range than AD7766-1BRUZ (vs AD7766-1BRUZ)
- Lower power than AD7176-2BRUZ (vs AD7176-2BRUZ)
Design Notes
The AD7766-2BRUZ operates from a 2.5 V supply. Use a low-noise LDO regulator to provide a clean supply voltage. Decouple the VDD pin with a 10 µF ceramic capacitor and a 0.1 µF capacitor close to the pin. The reference input should be bypassed with a low-ESR capacitor, such as a 10 µF X7R ceramic, to ensure stable operation.
For optimal performance, place the AD7766-2BRUZ on a PCB with a solid ground plane. Keep analog and digital grounds separate and connect them at a single point. Route the analog input traces away from digital signals to minimize noise coupling. Use a ground guard ring around the analog input pins if possible.
Ensure the analog input source impedance is low to avoid settling time issues. The AD7766-2BRUZ has a track-and-hold amplifier, so a high-impedance source can cause errors. Use a buffer amplifier if necessary. Also, avoid exceeding the absolute maximum ratings on the input pins to prevent damage.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
