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Analog Devices Inc. AD7767BRUZ-2
- Part No.:
- AD7767BRUZ-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7767BRUZ-2.pdf
- Description:
- IC ADC 24BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,173
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Product details
Overview
AD7767BRUZ-2 from Analog Devices is a 24-bit, oversampled successive approximation register (SAR) analog-to-digital converter optimized for high-precision, low-power data acquisition. It delivers 115.5 dB dynamic range at 32 kSPS, consumes only 8.5 mW, and features ±3 ppm typical INL, 24-bit no-missing-codes resolution, and on-chip linear-phase FIR filtering - enabling high-fidelity measurement of small-signal variations atop large dc/ac backgrounds in portable instrumentation.
For engineers reviewing the AD7767BRUZ-2 datasheet, AD7767BRUZ-2 pinout, AD7767BRUZ-2 application, or AD7767BRUZ-2 equivalent, key selection considerations include its 32 kSPS output data rate with 115.5 dB dynamic range, TSSOP-16 package compatibility, 2.5 V analog/digital supply with flexible 1.8–3.6 V logic interface, daisy-chain capability, and synchronization support for multi-device timing coherence in battery-powered or thermally constrained systems.
Technical Context
The AD7767BRUZ-2 implements an oversampled SAR architecture with a three-stage decimating FIR filter (decimation ratio = 32), yielding 32 kSPS output while suppressing quantization noise beyond the signal band. Its fully differential analog input structure (VIN+, VIN−) provides inherent common-mode rejection and supports ±VREF differential input voltage range referenced to a 5 V external reference.
Operation relies on a 1.024 MHz main clock (MCLK), with digital interface powered by VDRIVE (1.8–3.6 V) and logic controlled via CS, SCLK, SDI, and SDO pins. The SYNC/PD pin enables both multi-device synchronization and ultra-low-power mode (6 µA), while DRDY signals data readiness with latency of 71 ns after MCLK rising edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit, no missing codes - guarantees monotonicity and full code coverage across full temperature range (−40°C to +105°C). |
| Dynamic Range | 115.5 dB at 32 kSPS (shorted inputs) - enables detection of sub-µV signals in presence of large dc offsets or ac carriers. |
| THD | −118 dB (typical) - ensures minimal harmonic distortion for high-fidelity spectral analysis in vibration monitoring or medical sensing. |
| INL | ±3 ppm (typical), ±7.6 ppm (max) - supports <0.001% gain linearity error in precision weigh scales or calibration equipment. |
| Power Consumption | 8.5 mW at 32 kSPS - allows continuous operation in USB-powered or coin-cell–backed portable DAQ systems. |
| Digital Filter | Linear-phase FIR with ±0.005 dB pass-band ripple and 100 dB stop-band attenuation - preserves phase integrity for time-domain waveform analysis. |
| Reference Input | 2.4 V to 5 V (VREF+) - supports high-accuracy external references (e.g., ADR445) for stable full-scale definition independent of AVDD. |
Pinout & Package
AD7767BRUZ-2 is housed in a 4.4 mm × 5 mm, 16-lead TSSOP package (RoHS-compliant, lead-free). Pin functions are validated per Analog Devices Rev. D datasheet (2024) and match the AD7767 family's standardized layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVDD) | Analog power supply | +2.5 V analog rail; must be decoupled locally to AGND to minimize noise coupling into SAR core. |
| 2 (VREF+) | External reference input | Accepts 2.4–5 V reference; defines full-scale range independently of AVDD - critical for metrology-grade accuracy. |
| 3 (REFGND) | Reference ground | Dedicated ground return for VREF+; must be connected directly to low-impedance analog ground plane. |
| 4 (VIN+), 5 (VIN−) | Differential analog inputs | True differential pair supporting ±VREF p-p input; rejects common-mode noise up to 110 dB at 50 Hz. |
| 6 (AGND), 11 (DGND) | Analog & digital grounds | Separate ground pins require star-point connection or split-plane design to prevent digital switching noise from modulating analog conversion. |
| 7 (SYNC/PD) | Synchronization/power-down control | Active-low dual-function pin: synchronizes sampling across multiple AD7767BRUZ-2 devices or initiates 6 µA power-down state. |
| 8 (DVDD), 9 (VDRIVE) | Digital supply & logic interface voltage | DVDD = 2.5 V; VDRIVE = 1.8–3.6 V sets I/O voltage levels - enables direct interfacing with 1.8 V, 2.5 V, 3 V, or 3.3 V microcontrollers. |
| 10 (SDO), 12 (DRDY), 13 (SCLK), 15 (SDI), 16 (CS) | Serial interface signals | 24-bit MSB-first twos-complement SPI-compatible interface; DRDY falling edge indicates valid data; CS enables daisy-chaining. |
Key Features
| Feature | Design Value |
|---|---|
| Oversampled SAR architecture | Eliminates need for external anti-aliasing filters above 0.453×ODR (14.5 kHz for AD7767BRUZ-2), reducing BOM cost and board area. |
| On-chip linear-phase FIR filter | Provides deterministic group delay (37/ODR = 1.16 ms) and zero phase distortion - essential for coherent multi-channel time-aligned acquisition. |
| Daisy-chain capability | SDI/SDO chaining enables synchronized readout of up to N devices using single SCLK/CS lines - simplifies routing in multi-sensor PCB layouts. |
| Flexible logic interface | VDRIVE pin supports 1.8 V, 2.5 V, 3 V, or 3.6 V I/O voltage - eliminates level-shifting components when interfacing with diverse host processors. |
| Ultra-low-power operation | 8.5 mW active power and 6 µA power-down current enable >1-year battery life in wireless sensor nodes sampling at 32 kSPS. |
Applications
| Portable Medical ECG Monitor | Vibration Analysis Node |
|---|---|
|
Use Scenario: Continuous 32 kSPS acquisition of low-amplitude bio-potential signals (0.5–5 mV) from dry electrodes in battery-powered wearable ECG units. IC Role / Device Role / Timing Role: Primary ADC capturing differential lead-II signals with 24-bit resolution and 115.5 dB dynamic range to resolve microvolt-level ST-segment shifts amid 1–2 V dc electrode offset. Use Value: On-chip FIR filtering suppresses 50/60 Hz mains interference without external analog filters, while 8.5 mW power enables >72-hour operation on a 500 mAh Li-ion cell. |
Use Scenario: Edge-based condition monitoring of rotating machinery using MEMS accelerometers sampled at 32 kSPS in industrial IoT gateways. IC Role / Device Role / Timing Role: High-linearity ADC digitizing ±2 g accelerometer outputs with ±3 ppm INL to preserve amplitude fidelity for FFT-based fault signature extraction. Use Value: Synchronization via SYNC/PD pin allows precise time-alignment of vibration data across multiple motor sensors - critical for bearing defect frequency correlation. |
| USB-Powered Precision DAQ | Low-Power Wireless Sensor Hub |
|
Use Scenario: Compact benchtop data logger connecting to PC via USB, acquiring calibrated sensor outputs (pressure, strain) at 32 kSPS with 24-bit integrity. IC Role / Device Role / Timing Role: Core ADC providing 24-bit no-missing-codes performance and ±7.6 ppm max INL to meet Class I calibration standards for test equipment. Use Value: 5 V reference input (VREF+) enables use of ADR445 (0.04 ppm/°C drift) - achieving <10 ppm total system gain error over −40°C to +85°C operating range. |
Use Scenario: Solar-powered environmental sensor node measuring temperature, humidity, and acoustic emissions with duty-cycled 32 kSPS bursts. IC Role / Device Role / Timing Role: Low-power ADC entering 6 µA power-down between acquisitions; DRDY-triggered wake-up ensures deterministic latency for time-sensitive event capture. Use Value: Daisy-chain support reduces GPIO count on host MCU - enabling 8-channel synchronized acquisition using only 4 SPI lines and 1 CS signal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7766-2 | 16-bit resolution, 115.5 dB dynamic range at 32 kSPS, 8.5 mW - lacks 24-bit depth and 24-bit no-missing-codes guarantee. | Targeted at cost-sensitive industrial control where 16-bit linearity suffices; not suitable for metrology-grade medical or calibration systems. | Select AD7767BRUZ-2 when 24-bit monotonicity, ±3 ppm INL, and true 24-bit dynamic range are required for traceable measurements. |
| ADS127L01IPBSR | 24-bit delta-sigma ADC, 109 dB dynamic range at 32 kSPS, 11 mW - higher power, lower dynamic range, and longer filter settling time (1.5 ms vs. 1.16 ms). | Better suited for DC-critical applications (e.g., weigh scales) due to inherent drift rejection; less optimal for wideband vibration or ECG requiring fast transient response. | Choose AD7767BRUZ-2 for applications demanding lowest latency, highest dynamic range at 32 kSPS, and deterministic FIR group delay. |
Compared with AD7766-2 and ADS127L01IPBSR, the AD7767BRUZ-2 uniquely combines 24-bit no-missing-codes resolution, 115.5 dB dynamic range, 1.16 ms group delay, and 8.5 mW power - making it the only option among the three that satisfies simultaneous requirements for metrology-grade linearity, wideband SNR, and ultra-low-power embedded operation.
Availability
AD7767BRUZ-2 is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial vibration monitoring, USB-powered precision data acquisition, and low-power wireless sensor hubs requiring stable component supply with guaranteed long-term availability.
Supply support for AD7767BRUZ-2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and healthcare markets since 1965.
The AD7767 family was designed specifically for ultralow-power, high-dynamic-range data acquisition systems - targeting applications where 24-bit resolution, exceptional ac/dc accuracy, and sub-10 mW power consumption are simultaneously mandatory.
FAQ
What is the maximum output data rate of the AD7767BRUZ-2?
The AD7767BRUZ-2 operates at a fixed output data rate of 32 kSPS, achieved through a decimation ratio of 32 applied to its 1.024 MHz main clock. This rate is factory-configured and cannot be altered via software or pin strapping - unlike the AD7767 (128 kSPS) or AD7767-1 (64 kSPS) variants. All timing parameters, including DRDY latency (71 ns) and filter settling (2357 × tMCLK), are specified exclusively for this 32 kSPS mode in the AD7767BRUZ-2 datasheet.
Does the AD7767BRUZ-2 require an external anti-aliasing filter?
The AD7767BRUZ-2's oversampled SAR architecture and integrated FIR filter significantly relax anti-aliasing requirements: the digital filter provides 100 dB stop-band attenuation starting at 0.547×ODR (≈17.5 kHz), meaning only a simple RC filter with cutoff near 20 kHz is needed to suppress aliasing from frequencies above 17.5 kHz. No high-order analog filter is required - reducing component count, board space, and phase distortion compared to Nyquist-rate ADCs.
Can the AD7767BRUZ-2 interface directly with a 1.8 V microcontroller?
Yes. The AD7767BRUZ-2 supports logic-level flexibility via its VDRIVE pin, which accepts 1.8 V to 3.6 V. When 1.8 V is applied to VDRIVE, all digital inputs (CS, SCLK, SDI, SYNC/PD) recognize 0.3×VDRIVE (0.54 V) as VIL max and 0.7×VDRIVE (1.26 V) as VIH min, while digital outputs (SDO, DRDY) drive to VOL ≤ 0.4 V and VOH ≥ VDRIVE − 0.3 V (1.5 V). This enables direct, level-compatible connection to 1.8 V MCUs without external translators.
How does the AD7767BRUZ-2 achieve 115.5 dB dynamic range?
The AD7767BRUZ-2 achieves 115.5 dB dynamic range through three synergistic design elements: (1) 24-bit oversampled SAR core with 22-bit effective resolution, (2) 32× decimating FIR filter that attenuates out-of-band quantization noise by 100 dB, and (3) ultra-low-noise analog front-end with −118 dB THD and 15 nV/°C zero-drift. This combination allows resolution of 1 LSB steps of ~290 nV (with 5 V reference) amid 3.5 V p-p full-scale range - verified under shorted-input conditions per Table 2 of the Rev. D datasheet.
Is the AD7767BRUZ-2 pin-compatible with other AD7767 variants?
Yes. The AD7767BRUZ-2 shares identical pinout, package (16-lead TSSOP), and electrical interface specifications with AD7767BRUZ and AD7767BRUZ-1. All variants use the same AVDD, DVDD, VDRIVE, VREF+, VIN+, VIN−, AGND, DGND, REFGND, CS, SCLK, SDO, SDI, DRDY, SYNC/PD, and MCLK pin assignments and voltage tolerances. Firmware and PCB layout designed for any AD7767 variant can be reused for AD7767BRUZ-2 without modification.
AD7767BRUZ-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 32k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.5V
- Voltage - Supply, Digital:
- 2.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7767BRUZ-2 FAQ
1.How can I place an order for AD7767BRUZ-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7767BRUZ-2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7767BRUZ-2 reliable?
The price and inventory of AD7767BRUZ-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7767BRUZ-2 is usually 5 days.
3.What payment methods are accepted for AD7767BRUZ-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7767BRUZ-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7767BRUZ-2?
AD7767BRUZ-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7767BRUZ-2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7767BRUZ-2?
For technical support, including AD7767BRUZ-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7767BRUZ-2 requirements.
6.How does Aetrix verify that AD7767BRUZ-2 is sourced from the original manufacturer or authorized distributors?
All AD7767BRUZ-2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7767BRUZ-2 meets industry standards.
7.What is the process for return or replacement of AD7767BRUZ-2?
All AD7767BRUZ-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7767BRUZ-2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7767BRUZ-2 part is unused and in its original packaging.
Return procedure for AD7767BRUZ-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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