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Analog Devices Inc. AD7934BRUZ-6REEL7
- Part No.:
- AD7934BRUZ-6REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7934BRUZ-6REEL7.pdf
- Description:
- IC ADC 12BIT SAR 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,337
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Product details
Overview
AD7934BRUZ-6REEL7 from Analog Devices is a 12-bit, 4-channel, 1.5 MSPS successive approximation register (SAR) ADC with integrated sequencer and on-chip 2.5 V reference. It supports single-ended, pseudo-differential, and fully differential analog inputs, operates from a single 2.7 V to 5.25 V supply, and delivers 70 dB SINAD at 50 kHz input frequency in differential mode. It is used in high-speed data acquisition systems requiring channel multiplexing without pipeline delay.
For engineers reviewing the AD7934BRUZ-6REEL7 datasheet, AD7934BRUZ-6REEL7 pinout, AD7934BRUZ-6REEL7 application, or AD7934BRUZ-6REEL7 equivalent, key selection considerations include its 12-bit resolution, 4-channel sequencer, VDRIVE interface independence, 2.5 V ±0.2% internal reference, and TSSOP-28 package compatibility with space-constrained industrial and instrumentation designs.
Technical Context
The AD7934BRUZ-6REEL7 implements a SAR architecture with a differential track-and-hold amplifier supporting up to 50 MHz input bandwidth. Its sequencer enables preprogrammed channel cycling across VIN0–VIN3 without host intervention, and the control register allows runtime configuration of input range (0–VREF or 0–2×VREF), output coding (straight binary or two's complement), and power modes.
It uses a 25.5 MHz master clock (CLKIN) for deterministic conversion timing (tCONV = t2 + 13 tCLK), with BUSY signaling completion. The VDRIVE pin decouples logic interface voltage (2.7–5.25 V) from analog supply (VDD), enabling direct interfacing to 3 V or 5 V microprocessors while maintaining analog performance integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonicity and no missing codes over full scale; enables 1 LSB = 610 µV step size with 2.5 V reference. |
| Throughput Rate | 1.5 MSPS - supports real-time sampling of signals up to 750 kHz Nyquist bandwidth; suitable for transient capture in motor control and power quality monitoring. |
| SINAD | 70 dB min (differential mode, fIN = 50 kHz) - corresponds to ~11.3 ENOB; sufficient for precision measurement in test equipment and medical sensors. |
| On-chip Reference | 2.5 V ±0.2% @ 25°C, 25 ppm/°C max - eliminates external reference component count and layout sensitivity; stable enough for ±0.5 LSB DC accuracy over temperature. |
| Power Dissipation | 6 mW max @ 3 V, 13.5 mW max @ 5 V - enables battery-powered or thermally constrained applications such as portable diagnostics and edge IoT nodes. |
| Input Configuration | 4-channel software-selectable (single-ended / pseudo-diff / fully diff) - reduces external signal conditioning complexity and PCB area in multi-sensor systems. |
| Package | 28-lead TSSOP - surface-mount compatible with standard reflow profiles; 4.4 mm × 9.7 mm footprint supports high-density mixed-signal layouts. |
Pinout & Package
AD7934BRUZ-6REEL7 is housed in a 28-lead Thin Shrink Small Outline Package (TSSOP) with exposed pad (RoHS-compliant, lead-free). Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN3 | Analog Input Channels | Four configurable inputs accepting single-ended (0–VREF), pseudo-differential (VIN+ referenced to AGND, VIN− biased), or fully differential (VIN+, VIN−) signals; unused channels must be tied to AGND. |
| VREFIN/VREFOUT | Reference I/O | Provides 2.5 V ±0.2% internal reference; can be overdriven with external 0.1–VDD reference for improved stability or extended range. |
| CONVST | Conversion Start | Falling-edge-triggered; initiates track-to-hold transition and conversion; rising edge wakes device from autoshutdown mode. |
| BUSY | Status Output | Active-high open-drain signal indicating conversion in progress; goes low when result is latched and ready for readback. |
| DB0–DB11 | Parallel Data Bus | 12-bit three-state outputs (word mode) or 8-bit + channel ID (byte mode); logic levels set by VDRIVE, independent of VDD. |
| VDRIVE | Interface Supply | Defines parallel bus voltage (2.7–5.25 V); allows direct connection to 3 V or 5 V processors without level shifters. |
| AGND / DGND | Analog & Digital Grounds | Separate ground pins require star-point connection; differential voltage ≤ 0.3 V ensures <1 LSB noise coupling between domains. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture delivers first valid sample after one CONVST edge - essential for closed-loop control where latency must be deterministic and minimal. |
| Software-configurable input topology | MODE bits in control register select single-ended, pseudo-differential, or fully differential mode per channel - eliminates need for external op-amp networks in mixed-signal front-ends. |
| VDRIVE interface independence | Parallel bus operates at VDRIVE voltage regardless of VDD - simplifies integration with heterogeneous processor families (e.g., 3.3 V FPGA + 5 V analog section). |
| Channel sequencer with auto-cycling | Predefined sequence (e.g., VIN0→VIN1→VIN2→VIN3) executes autonomously after initial trigger - reduces host CPU overhead in continuous monitoring applications. |
| Full shutdown mode (2 µA) | Enables ultra-low-power sleep states between bursts; recovery time is one CONVST cycle - ideal for duty-cycled sensor hubs and energy-harvesting systems. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous acquisition of voltage, current, temperature, and vibration signals from multiple sensors on PLC I/O modules. IC Role / Device Role / Timing Role: 4-channel SAR ADC performing synchronized sampling with sequencer-driven round-robin conversion at 1.5 MSPS. Use Value: Eliminates external MUX and timing controller; 70 dB SINAD ensures accurate RMS calculation for predictive maintenance algorithms. |
Use Scenario: Real-time sampling of phase currents and DC bus voltage in 3-phase inverter drives. IC Role / Device Role / Timing Role: Simultaneous-capable (via sequencer) 12-bit digitizer capturing current sense and voltage feedback within tight PWM dead-time windows. Use Value: No pipeline latency enables sub-microsecond loop closure; VDRIVE support allows direct interface to 3.3 V DSP without level-shifting components. |
| Portable Test Equipment | Medical Sensor Interface |
|
Use Scenario: Handheld oscilloscope or waveform analyzer requiring multi-channel analog capture with battery life optimization. IC Role / Device Role / Timing Role: Low-power 12-bit ADC supplying digitized waveforms to ARM Cortex-M host via parallel bus; autostandby mode cuts idle current to 160 µA. Use Value: Integrated 2.5 V reference removes calibration drift concerns; TSSOP-28 package fits compact 4-layer PCBs with minimal decoupling (0.1 µF + 10 µF). |
Use Scenario: Multi-parameter patient monitor acquiring ECG, respiration, and SpO₂ analog signals. IC Role / Device Role / Timing Role: High-accuracy ADC converting low-amplitude biopotentials with selectable pseudo-differential input to reject common-mode interference. Use Value: ±1 LSB INL and 70 dB SINAD meet IEC 60601-2-27 requirements for diagnostic-grade signal fidelity; isolated AGND/DGND routing minimizes noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7934-6BRUZ | Same die, identical specs, but packaged in tape-and-reel with different ordering suffix (no -REEL7); same 28-lead TSSOP, same 1.5 MSPS throughput and 12-bit resolution. | No functional difference; intended for identical use cases including industrial DAQ and motor control. | Select AD7934-6BRUZ if standard reel packaging is preferred; AD7934BRUZ-6REEL7 is optimized for automated SMT assembly with verified reel integrity. |
| ADS8325IPW | 16-bit, 100 kSPS, 4-channel SAR ADC (TI); higher resolution but 15× slower; no integrated sequencer; requires external reference and level shifters for 3 V logic. | Better for precision DC measurements (e.g., weigh scales), unsuitable for dynamic signal capture above 50 kHz. | Choose ADS8325IPW only when resolution >12 bits is mandatory and speed <100 kSPS is acceptable; AD7934BRUZ-6REEL7 offers superior speed/power/feature balance for real-time applications. |
Compared with AD7934-6BRUZ, AD7934BRUZ-6REEL7 provides identical electrical performance with enhanced manufacturing traceability for high-volume SMT lines; versus ADS8325IPW, it trades 4 bits of resolution for 15× higher throughput, integrated reference, sequencer, and VDRIVE flexibility - making it optimal for cost-sensitive, latency-critical embedded systems.
Availability
AD7934BRUZ-6REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, portable test equipment, and medical sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7934BRUZ-6REEL7 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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7933/AD7934 product line was designed for high-speed, low-power data acquisition in space- and power-constrained embedded systems, emphasizing integrated functionality (sequencer, reference, flexible I/O) to reduce system-level component count and layout complexity.
FAQ
What is the maximum input frequency supported by the AD7934BRUZ-6REEL7?
The AD7934BRUZ-6REEL7 features a wide-bandwidth track-and-hold amplifier supporting full-power analog input frequencies up to 50 MHz (−3 dB point). At 50 kHz input frequency, it achieves 70 dB SINAD in differential mode, confirming effective anti-aliasing and dynamic performance for medium-bandwidth signal acquisition tasks.
Does the AD7934BRUZ-6REEL7 require an external reference?
No, the AD7934BRUZ-6REEL7 includes an accurate on-chip 2.5 V reference with ±0.2% initial tolerance and 25 ppm/°C temperature coefficient. This internal reference is sufficient for most precision applications; however, the VREFIN/VREFOUT pin can be overdriven with an external reference (0.1 V to VDD) when higher stability or custom voltage ranges are needed.
How does the sequencer function in the AD7934BRUZ-6REEL7?
The AD7934BRUZ-6REEL7 sequencer allows preprogramming of channel conversion order (e.g., VIN0 → VIN1 → VIN2 → VIN3) via the control register. Once enabled, it automatically cycles through the selected channels without host intervention after each CONVST trigger, reducing software overhead and enabling deterministic multi-channel sampling in real-time control loops.
What power management modes are available on the AD7934BRUZ-6REEL7?
The AD7934BRUZ-6REEL7 offers three power modes: Normal (2.7 mA max @ 5 V), Autostandby (160 µA typ @ 100 kSPS), and Full/Autoshutdown (2 µA max). Mode selection is controlled via the control register, allowing dynamic trade-offs between throughput and quiescent current - critical for battery-operated and thermally sensitive applications.
Is the AD7934BRUZ-6REEL7 pin-compatible with other devices in the AD7933/AD7934 family?
Yes, all AD7933/AD7934 variants - including AD7934BRUZ-6REEL7, AD7934-6BRUZ, and AD7933 equivalents - share identical 28-lead TSSOP pinouts and register maps. The only differences are resolution (10-bit vs. 12-bit) and minor AC performance specifications; hardware designs can reuse the same PCB layout across this family with firmware-level configuration changes.
AD7934BRUZ-6REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1.5M
- Number of Inputs:
- 4
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- Parallel
- 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:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7934BRUZ-6REEL7 FAQ
1.How can I place an order for AD7934BRUZ-6REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7934BRUZ-6REEL7 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 AD7934BRUZ-6REEL7 reliable?
The price and inventory of AD7934BRUZ-6REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7934BRUZ-6REEL7 is usually 5 days.
3.What payment methods are accepted for AD7934BRUZ-6REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7934BRUZ-6REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7934BRUZ-6REEL7?
AD7934BRUZ-6REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7934BRUZ-6REEL7 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 AD7934BRUZ-6REEL7?
For technical support, including AD7934BRUZ-6REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7934BRUZ-6REEL7 requirements.
6.How does Aetrix verify that AD7934BRUZ-6REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7934BRUZ-6REEL7 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 AD7934BRUZ-6REEL7 meets industry standards.
7.What is the process for return or replacement of AD7934BRUZ-6REEL7?
All AD7934BRUZ-6REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7934BRUZ-6REEL7, 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 AD7934BRUZ-6REEL7 part is unused and in its original packaging.
Return procedure for AD7934BRUZ-6REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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