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Analog Devices Inc. AD7329BRUZ-REEL7
- Part No.:
- AD7329BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7329BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,988
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Product details
Overview
AD7329BRUZ-REEL7 from Analog Devices is a 12-bit plus sign (13-bit) SAR ADC with true bipolar input capability, 8-channel multiplexed analog inputs, software-selectable input ranges (±10 V, ±5 V, ±2.5 V, 0 V to +10 V), and 1 MSPS throughput rate. It integrates an internal 2.5 V reference, high-speed SPI-compatible serial interface, and temperature indicator - used in industrial data acquisition systems requiring high-voltage signal conditioning and channel sequencing.
For engineers reviewing the AD7329BRUZ-REEL7 datasheet, AD7329BRUZ-REEL7 pinout, AD7329BRUZ-REEL7 application, or AD7329BRUZ-REEL7 equivalent, key selection considerations include true differential/single-ended/pseudo-differential input configuration, ±10 V bipolar range support, 20 MHz full-power bandwidth, low 21 mW power at 1 MSPS, and iCMOS process enabling 33 V operation in TSSOP-24.
Technical Context
The AD7329BRUZ-REEL7 implements a successive approximation register (SAR) architecture with integrated track-and-hold, channel sequencer, and programmable input structure supporting single-ended, true differential, and pseudo-differential modes per channel. Its iCMOS process enables ±16.5 V analog supply rails (VDD/VSS) while maintaining logic-level compatibility via separate VDRIVE and VCC supplies.
It features MUXOUT± and ADCIN± pins for external signal conditioning between multiplexer and ADC core, independent per-channel range selection via dedicated range registers, and four power modes (normal, autostandby, autoshutdown, full shutdown) controlled by PM0/PM1 bits. The internal 2.5 V reference can be disabled for external reference use up to 3 V, enabling ±12 V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit plus sign (13-bit total); supports no-missing-codes performance in differential mode. |
| Throughput Rate | 1 MSPS maximum; requires 20 MHz SCLK and 16 clock cycles per conversion. |
| Analog Input Ranges | Software-selectable per channel: ±10 V, ±5 V, ±2.5 V, or 0 V to +10 V - enables mixed-range acquisition on same device. |
| Full Power Bandwidth | 20 MHz at −3 dB; supports accurate digitization of fast transients and wideband sensor outputs. |
| SNR (Differential) | 77 dB typical at 50 kHz input; ensures high dynamic range for precision measurement applications. |
| Power Dissipation | 21 mW at 1 MSPS with VDD = 12 V, VSS = −12 V, VCC = 5 V - suitable for thermally constrained industrial modules. |
| Reference | Internal 2.5 V ±10 mV over temperature; externally bypassed with 680 nF capacitor for stability. |
Pinout & Package
AD7329BRUZ-REEL7 is housed in a 24-lead TSSOP package with exposed pad (RoHS-compliant, lead-free). Pin layout separates analog (AGND, VDD, VSS, VIN0–VIN7, ADCIN±, MUXOUT±, REFIN/REFOUT) and digital (DGND, CS, DIN, DOUT, SCLK, VCC, VDRIVE) domains to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low frame signal initiating conversion and serial data transfer; must meet t1 ≥ 5 ns minimum pulse width. |
| DIN / DOUT | Serial Data I/O | 16-bit MSB-first stream: 3 channel ID bits + sign bit + 12 data bits; compatible with SPI/QSPI/MICROWIRE protocols. |
| VIN0–VIN7 | Analog Input Channels | Eight configurable inputs; each independently set to single-ended, true differential, or pseudo-differential mode via control register. |
| ADCIN+ / ADCIN− | ADC Core Inputs | Direct access to SAR converter input; allows external filtering or driver amplifier insertion before final conversion stage. |
| MUXOUT+ / MUXOUT− | Multiplexer Outputs | High-voltage outputs post-mux but pre-track-and-hold; enable signal conditioning (e.g., gain, filtering) before ADC sampling. |
| REFIN/REFOUT | Reference I/O | Provides 2.5 V internal reference or accepts external 2.5–3 V reference; requires 680 nF decoupling capacitor for stability. |
| VDD / VSS | Analog Supplies | ±12 V to ±16.5 V dual supplies; support true bipolar input operation up to ±10 V with internal reference. |
| VCC / VDRIVE | Digital Supplies | VCC powers ADC core (2.7–5.25 V); VDRIVE sets logic interface voltage (2.7–5.25 V), independent of VCC but ≤ VCC + 0.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar input support | Accepts ±10 V, ±5 V, ±2.5 V signals without external level-shifting circuitry - reduces BOM count and PCB area. |
| Per-channel range programming | Each of eight inputs independently configured for different voltage ranges - enables simultaneous acquisition of sensors with mismatched output spans. |
| Separate MUXOUT and ADCIN pins | Allows insertion of external op-amp or RC filter between multiplexer and ADC core - improves anti-aliasing and noise rejection. |
| iCMOS process technology | Enables 33 V total supply swing (VDD–VSS) in compact TSSOP-24 package - delivers high-voltage performance previously requiring larger SOIC or ceramic packages. |
| Temperature indicator | On-chip diode-based sensor provides real-time die temperature readout via dedicated register - aids thermal management in sealed enclosures. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow sensors across multiple PLC I/O modules with varying output ranges (e.g., ±5 V transmitters and 0–10 V analog outputs). IC Role / Device Role / Timing Role: 8-channel SAR ADC performing synchronized sampling with channel sequencing and per-input range selection. Use Value: Eliminates need for external range-scaling amplifiers and reduces system calibration complexity through software-configurable input spans. | Use Scenario: High-speed parametric testing of semiconductor devices requiring precise DC and AC characterization across multiple test points. IC Role / Device Role / Timing Role: Precision digitizer capturing transient waveforms and steady-state levels at up to 1 MSPS with 20 MHz bandwidth. Use Value: Delivers 77 dB SNR in differential mode, enabling sub-0.1% measurement accuracy for production-grade ATE platforms. |
| Energy Metering Front-End | Motor Drive Current Sensing |
Use Scenario: Simultaneous sampling of phase voltages and currents in three-phase smart meters using isolated shunt or CT-based sensing. IC Role / Device Role / Timing Role: Bipolar-input ADC acquiring true differential current signals and unipolar voltage signals within same acquisition cycle. Use Value: Supports ±10 V and 0–10 V ranges concurrently - accommodates both isolated amplifier outputs and direct transformer secondaries. | Use Scenario: Real-time current feedback in servo drives where motor phase currents swing bipolarly around zero during PWM commutation. IC Role / Device Role / Timing Role: High-bandwidth ADC capturing fast current transients with 20 MHz full-power bandwidth and 1 MSPS throughput. Use Value: Enables closed-loop torque control with <1 µs aperture jitter - critical for minimizing torque ripple in high-performance motion systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, software-configurable ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7328BRUZ | Same 8-channel, 12-bit plus sign architecture; identical pinout and register map; 1 MSPS throughput but no temperature indicator. | Lacks on-chip temperature sensor; otherwise functionally interchangeable in fixed-range or non-thermal-aware systems. | Select AD7328BRUZ when thermal monitoring is unnecessary and cost optimization is prioritized. |
| ADS8588SIPM | 8-channel, 16-bit SAR ADC with ±10 V input; higher resolution but lower 1 MSPS max rate; uses parallel interface instead of SPI. | Requires wider data bus and additional handshaking signals; not pin-compatible; better suited for high-resolution static measurements than high-throughput sequencing. | Choose ADS8588SIPM only when 16-bit resolution is mandatory and system design accommodates parallel interface and larger footprint. |
Compared with AD7328BRUZ and ADS8588SIPM, AD7329BRUZ-REEL7 uniquely combines per-channel software-selectable ranges, integrated temperature sensing, and SPI interface in TSSOP-24 - making it optimal for space-constrained, thermally aware, multi-sensor industrial DAQ systems requiring flexible analog input scaling.
Availability
AD7329BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, energy metering front-ends, and motor drive current sensing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7329BRUZ-REEL7 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.
The AD7329BRUZ-REEL7 belongs to the AD732x family of high-voltage, software-configurable SAR ADCs designed specifically for industrial data acquisition where true bipolar signal handling, channel flexibility, and power efficiency are critical.
FAQ
What input configurations does the AD7329BRUZ-REEL7 support?
The AD7329BRUZ-REEL7 supports single-ended, true differential, and pseudo-differential input modes per channel, selected via Mode 1/Mode 0 bits in the control register. Each of the eight analog inputs (VIN0–VIN7) can be independently assigned one of these configurations, enabling mixed-mode acquisition on a single device - for example, measuring both unipolar sensor outputs and bipolar current feedback simultaneously. This flexibility is implemented entirely in firmware without hardware changes.
Does the AD7329BRUZ-REEL7 require an external reference?
No, the AD7329BRUZ-REEL7 includes an internal 2.5 V reference with ±10 mV accuracy over temperature, accessible at the REFIN/REFOUT pin and requiring only a 680 nF decoupling capacitor. However, it also supports external references from 2.5 V to 3 V - applying 3 V enables ±12 V true bipolar input range. The internal reference remains active unless explicitly disabled via the reference control bit in the configuration register.
How does the AD7329BRUZ-REEL7 handle power management?
The AD7329BRUZ-REEL7 offers four distinct power modes controlled by PM0/PM1 bits: Normal (3.4 mA total supply current at 1 MSPS), Autostandby (1.3 mA at 250 kSPS), Autoshutdown (1 µA), and Full Shutdown (1 µA). These modes allow dynamic trade-offs between throughput and power consumption - for instance, entering autoshutdown between bursts of acquisition reduces average power in battery-operated DAQ nodes without sacrificing peak performance when needed.
Can the AD7329BRUZ-REEL7 interface directly with a microcontroller's SPI peripheral?
Yes, the AD7329BRUZ-REEL7 features an SPI-compatible serial interface operating up to 20 MHz SCLK, supporting standard SPI, QSPI, DSP, and MICROWIRE protocols. It uses CS-active-low framing, falling-edge data capture on DIN, and falling-edge data output on DOUT - requiring no custom timing logic. The 16-bit data frame (3 channel ID + sign + 12 data bits) aligns with common 16-bit MCU SPI peripherals, enabling plug-and-play integration with minimal driver development.
What is the purpose of the MUXOUT± pins on the AD7329BRUZ-REEL7?
The MUXOUT+ and MUXOUT− pins on the AD7329BRUZ-REEL7 provide direct access to the output of the internal analog multiplexer, prior to the track-and-hold stage. This allows external circuitry - such as anti-aliasing filters, gain amplifiers, or isolation buffers - to be inserted between multiplexing and digitization. For example, placing an RC filter here attenuates high-frequency noise before sampling, improving effective resolution without affecting channel switching speed or introducing inter-channel crosstalk.
AD7329BRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCMOS®
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 4, 7, 8
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±12V ~ 16.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- True Bipolar
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7329BRUZ-REEL7 FAQ
1.How can I place an order for AD7329BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7329BRUZ-REEL7 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 AD7329BRUZ-REEL7 reliable?
The price and inventory of AD7329BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7329BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7329BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7329BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7329BRUZ-REEL7?
AD7329BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7329BRUZ-REEL7 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 AD7329BRUZ-REEL7?
For technical support, including AD7329BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7329BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7329BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7329BRUZ-REEL7 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 AD7329BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7329BRUZ-REEL7?
All AD7329BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7329BRUZ-REEL7, 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 AD7329BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7329BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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