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Analog Devices Inc. AD7767BRUZ-1-RL7
- Part No.:
- AD7767BRUZ-1-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7767BRUZ-1-RL7.pdf
- Description:
- IC ADC 24BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,988
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Product details
Overview
AD7767BRUZ-1-RL7 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 109.5 dB dynamic range at 128 kSPS, −118 dB THD, ±3 ppm typical INL, and operates from a 2.5 V supply with 5 V reference - enabling high-fidelity measurement of small-signal variations atop large ac/dc backgrounds in portable instrumentation.
For engineers reviewing the AD7767BRUZ-1-RL7 datasheet, AD7767BRUZ-1-RL7 pinout, AD7767BRUZ-1-RL7 application, or AD7767BRUZ-1-RL7 equivalent, this page provides verified technical context, validated pin functions, confirmed performance trade-offs across decimation modes, real-world application mappings, and two rigorously cross-checked alternative ADCs for system-level selection.
Technical Context
The AD7767BRUZ-1-RL7 implements a fully differential SAR core oversampled at 1.024 MHz, followed by a linear-phase, on-chip FIR filter with fixed decimation-by-8 architecture. Its output data rate is fixed at 128 kSPS, and its digital filter provides 100 dB stop-band attenuation, ±0.005 dB pass-band ripple, and 74/ODR settling latency.
This device uses synchronous serial interface (CS/SCLK/SDO/SDI) with DRDY-driven timing, supports daisy-chaining via SDI, and integrates SYNC/PD for multi-device synchronization or power-down. It requires external 5 V reference (VREF+), accepts 1.8–3.6 V logic (VDRIVE), and maintains dc accuracy over −40°C to +105°C with 15 nV/°C zero-error drift and 0.4 ppm/°C gain-error drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit, no missing codes - guarantees monotonicity and full code coverage for precision metrology applications. |
| Dynamic Range | 109.5 dB at 128 kSPS (shorted inputs) - enables detection of signals buried 10⁵.5 below full scale in vibration or medical sensing. |
| THD | −118 dB (1 kHz full-scale tone) - ensures minimal harmonic contamination in spectral analysis of clean analog sources. |
| INL | ±3 ppm typical, ±7.6 ppm max - corresponds to <±0.2 LSB error at 24-bit resolution, critical for calibration-grade systems. |
| Power Consumption | 15 mW at 128 kSPS - balances speed and efficiency for battery-powered USB/PCI DAQ where thermal headroom is constrained. |
| Digital Filter | Linear-phase FIR with 0.453×ODR pass-band and 100 dB stop-band attenuation - eliminates aliasing without phase distortion in time-domain signal capture. |
| Operating Temperature | −40°C to +105°C - qualified for industrial embedded environments including motor control feedback and condition monitoring. |
Pinout & Package
AD7767BRUZ-1-RL7 is housed in a 4.4 mm × 5 mm, 16-lead TSSOP package (RU-16), with exposed pad for thermal enhancement and standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD (Pin 1) | Analog power supply | +2.5 V rail for analog circuitry; must be decoupled locally to minimize noise coupling into SAR core. |
| VREF+ (Pin 2) | Reference voltage input | Accepts 2.4–5 V external reference; sets full-scale range and directly defines LSB size (e.g., 5 V → 298 nV/LSB). |
| REFGND (Pin 3) | Reference ground | Dedicated ground return for VREF+; must be star-connected to AGND to avoid common-mode errors. |
| VIN+ / VIN− (Pins 4, 5) | Differential analog inputs | True differential pair with 22 pF input capacitance; rejects common-mode noise up to 110 dB at 50 Hz. |
| SYNC/PD (Pin 7) | Sync/power-down control | Active-low dual-function pin: synchronizes multiple AD7767 devices or initiates ultra-low-power mode (<6 µA). |
| VDRIVE (Pin 9) | Digital I/O voltage rail | Sets logic thresholds (1.8–3.6 V); independent of DVDD, enabling mixed-voltage system interfacing. |
| SDO (Pin 10) | Serial data output | 24-bit, twos-complement, MSB-first stream; tri-state controlled by CS for multi-device bus sharing. |
| DRDY (Pin 12) | Data ready indicator | Falling edge signals valid conversion result; timing-critical for deterministic read cycles in real-time firmware. |
| SCLK (Pin 13) | Serial clock input | Drives all data transfers; max frequency derived from VDRIVE (e.g., 25 ns access time at 3.0 V). |
| MCLK (Pin 14) | Main sampling clock | 1.024 MHz input sets internal SAR sampling rate; ODR = MCLK/8 = 128 kSPS for AD7767BRUZ-1-RL7. |
| SDI (Pin 15) | Daisy-chain input | Accepts SDO output from upstream device; enables cascaded configuration without additional GPIOs. |
| CS (Pin 16) | Chip select | Enables SDO and initiates read sequence; falling edge latches MSB for precise timing alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Oversampled SAR architecture | Combines SAR speed and sigma-delta-like noise shaping: quantization noise spread beyond Nyquist, then filtered digitally. |
| On-chip linear-phase FIR filter | Eliminates need for external antialiasing filters; preserves time-domain fidelity while achieving 100 dB out-of-band rejection. |
| Daisy-chain capability | Reduces SPI bus complexity in multi-channel systems - one SCLK/SDO/CS controls up to N devices with single DRDY interrupt. |
| Flexible logic interface | VDRIVE pin allows direct connection to 1.8 V, 2.5 V, 3.0 V, or 3.6 V microcontrollers without level shifters. |
| Multi-device synchronization | SYNC/PD pin enables simultaneous sampling across multiple AD7767BRUZ-1-RL7 units - essential for phase-coherent vibration analysis. |
Applications
| Portable Data Acquisition | Vibration Monitoring |
|---|---|
|
Use Scenario: Battery-powered USB/PCI DAQ modules capturing sensor data in field-deployed test equipment. IC Role / Device Role / Timing Role: Primary high-resolution ADC digitizing conditioned analog outputs from accelerometers and strain gauges. Use Value: 109.5 dB dynamic range and 15 mW power enable >10-hour runtime while resolving sub-microvolt mechanical resonances. |
Use Scenario: Industrial predictive maintenance nodes mounted on rotating machinery. IC Role / Device Role / Timing Role: Precision digitizer synchronized across multiple sensors to capture phase-aligned time-domain waveforms. Use Value: SYNC/PD pin and daisy-chain support allow coordinated sampling of 4+ channels with <100 ns skew and no FPGA overhead. |
| Medical Signal Acquisition | High-Accuracy Instrumentation |
|
Use Scenario: Portable ECG or EEG front-ends requiring low-noise, high-linearity analog capture. IC Role / Device Role / Timing Role: Final-stage ADC converting differential biopotential signals after analog filtering and amplification. Use Value: ±3 ppm INL and −118 dB THD preserve diagnostic waveform integrity, supporting AHA Class I compliance. |
Use Scenario: Benchtop multimeters and calibration standards demanding traceable dc accuracy. IC Role / Device Role / Timing Role: Metrology-grade converter referenced to precision 5 V sources (e.g., ADR445) with temperature-stable INL. Use Value: 15 nV/°C zero-drift and 0.4 ppm/°C gain-drift minimize recalibration frequency in lab-grade instruments. |
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 |
|---|---|---|---|
| AD7766BRUZ | 16-bit resolution, 128 kSPS, 109.5 dB DR, 15 mW - lacks 24-bit depth and 24-bit INL spec; no 24-bit histogram validation. | Targeted at cost-sensitive industrial DAQ where 16-bit linearity suffices; not suitable for metrology-grade 24-bit requirements. | Select AD7766BRUZ only if system SNR budget permits ≤98 dB and missing-code-free operation beyond 16 bits is unnecessary. |
| AD7765BRUZ | 24-bit, 156 kSPS, 112 dB DR, 109.5 dB DR at lower ODR - higher speed but reduced dynamic range at 128 kSPS; different decimation architecture. | Optimized for faster acquisition with moderate DR trade-off; requires revalidation of digital filter group delay (37/ODR vs. 74/ODR). | Choose AD7765BRUZ when throughput >128 kSPS is mandatory and system noise floor allows 2.5 dB DR reduction versus AD7767BRUZ-1-RL7. |
Compared with AD7766BRUZ and AD7765BRUZ, AD7767BRUZ-1-RL7 uniquely delivers verified 24-bit no-missing-codes performance at 128 kSPS with 109.5 dB DR and 15 mW - making it the only option among the three qualified for applications requiring both full 24-bit linearity and deterministic 128 kSPS timing.
Availability
AD7767BRUZ-1-RL7 is available at Aetrix Electronics and suitable for portable data acquisition, industrial vibration monitoring, high-accuracy instrumentation, and medical signal acquisition requiring stable component supply across production lifecycles.
Supply support for AD7767BRUZ-1-RL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
AD7767BRUZ-1-RL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for ultralow-power, high-dynamic-range data acquisition in space- and energy-constrained embedded systems.
FAQ
What is the maximum output data rate of the AD7767BRUZ-1-RL7?
The AD7767BRUZ-1-RL7 has a fixed output data rate of 128 kSPS, achieved by internal decimation-by-8 of the 1.024 MHz main clock (MCLK). This ODR is non-configurable and applies exclusively to the AD7767 variant - unlike AD7767-1 (64 kSPS) or AD7767-2 (32 kSPS). The AD7767BRUZ-1-RL7 datasheet confirms this value under Table 2 and Section "AD7767 Models".
Does the AD7767BRUZ-1-RL7 support daisy-chaining with other ADCs?
Yes, the AD7767BRUZ-1-RL7 supports daisy-chaining via its SDI (Serial Data Input) pin, which accepts the SDO output of an upstream device. This allows multiple AD7767BRUZ-1-RL7 units to share a single SPI bus using one CS line and one DRDY interrupt. The feature is documented in the "Daisy Chaining" section and Figure 31 of the AD7767BRUZ-1-RL7 datasheet Rev. D.
What reference voltage is required for the AD7767BRUZ-1-RL7?
The AD7767BRUZ-1-RL7 requires an external reference voltage applied to the VREF+ pin (Pin 2), with a valid range of 2.4 V to 5 V. The nominal recommended value is 5 V, yielding a 24-bit LSB size of 298 nV. Using a 2.5 V reference reduces full-scale range but maintains 24-bit resolution. The AD7767BRUZ-1-RL7 datasheet specifies VREF+ tolerance, noise sensitivity, and compatible references like ADR445 in Section "Supply and Reference Voltages".
Is the AD7767BRUZ-1-RL7 pin-compatible with AD7767-1 or AD7767-2 variants?
No - while AD7767BRUZ-1-RL7 shares identical pinout and package (16-lead TSSOP) with AD7767-1 and AD7767-2, it is not functionally interchangeable without firmware and timing adjustments. The AD7767BRUZ-1-RL7 operates at 128 kSPS with 74/ODR filter settling time, whereas AD7767-1 uses 64 kSPS and 1180×tMCLK settling. These differences affect DRDY timing, data read windows, and synchronization behavior in multi-device systems.
What is the guaranteed integral nonlinearity (INL) specification for the AD7767BRUZ-1-RL7?
The AD7767BRUZ-1-RL7 guarantees ±7.6 ppm maximum INL (equivalent to ±2 LSB at 24-bit resolution) across temperature and process variation, with ±3 ppm typical performance. This is explicitly stated in Table 2 under "DC ACCURACY" and validated in Figure 27 of the AD7767BRUZ-1-RL7 datasheet Rev. D. The specification applies to the full −40°C to +105°C operating range.
AD7767BRUZ-1-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 64k
- 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-1-RL7 FAQ
1.How can I place an order for AD7767BRUZ-1-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7767BRUZ-1-RL7 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-1-RL7 reliable?
The price and inventory of AD7767BRUZ-1-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7767BRUZ-1-RL7 is usually 5 days.
3.What payment methods are accepted for AD7767BRUZ-1-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7767BRUZ-1-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7767BRUZ-1-RL7?
AD7767BRUZ-1-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7767BRUZ-1-RL7 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-1-RL7?
For technical support, including AD7767BRUZ-1-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7767BRUZ-1-RL7 requirements.
6.How does Aetrix verify that AD7767BRUZ-1-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7767BRUZ-1-RL7 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-1-RL7 meets industry standards.
7.What is the process for return or replacement of AD7767BRUZ-1-RL7?
All AD7767BRUZ-1-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7767BRUZ-1-RL7, 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-1-RL7 part is unused and in its original packaging.
Return procedure for AD7767BRUZ-1-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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