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Analog Devices Inc. AD7892BRZ-3
- Part No.:
- AD7892BRZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7892BRZ-3.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
AD7892BRZ-3 from Analog Devices is a 12-bit, single-supply successive approximation ADC with ±2.5 V analog input range, 600 kSPS throughput, 1.47 µs conversion time, and integrated track/hold amplifier and +2.5 V reference - used in high-speed data acquisition systems for industrial process monitoring and sensor signal digitization.
For engineers reviewing the AD7892BRZ-3 datasheet, AD7892BRZ-3 pinout, AD7892BRZ-3 application, or AD7892BRZ-3 equivalent, key selection considerations include its dual serial/parallel interface, ±1 LSB relative accuracy, SOIC-24 package, 200 ns track/hold acquisition time, and bipolar two's complement output coding.
Technical Context
The AD7892BRZ-3 implements a 12-bit SAR architecture with on-chip track/hold amplifier and internal +2.5 V reference buffered to REF OUT/REF IN pin. Its LC2MOS process integrates precision bipolar front-end with low-power CMOS logic for stable operation at 600 kSPS.
Interface flexibility is achieved via MODE pin selection: parallel mode enables 12-bit TTL-compatible DB0–DB11 outputs with CS/RD/EOC handshaking; serial mode uses RFS/SCLK/SDATA three-wire protocol delivering 16-bit frames (4 leading zeros + 12-bit two's complement data).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes over full operating temperature range. |
| Throughput Rate | 600 kSPS - maximum sampling rate enabled by 1.47 µs conversion + 200 ns acquisition time. |
| Analog Input Range | ±2.5 V - supports bipolar sensor signals without external scaling circuitry. |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and end-point linearity critical for closed-loop control. |
| Reference Output | +2.5 V ±10 mV @ +25°C - internal buffered reference with 25 ppm/°C tempco, usable as system reference source. |
| Power Dissipation | 60 mW typ @ +5 V - enables portable and thermally constrained embedded designs. |
| Input Overvoltage Protection | ±7 V - protects VIN1 against transient surges beyond ±2.5 V range without damage. |
Pinout & Package
AD7892BRZ-3 is housed in a 24-lead SOIC (R-24) package with 0.3-inch body width and standard JEDEC MS-013 footprint. Pin 1 is located at top-left corner adjacent to VDD; pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply | +5 V ±5% power input; decoupling capacitor required near pin. |
| STANDBY (Pin 2) | Power mode control | Logic high = active; logic low = standby (75 µW typical power draw). |
| VIN2 (Pin 3) | Analog input reference | Must be connected to AGND for AD7892BRZ-3; left unconnected only if tied to AGND. |
| VIN1 (Pin 4) | Main analog input | Accepts ±2.5 V differential input; 2 kΩ input resistance per spec. |
| REF OUT/REF IN (Pin 5) | Reference interface | Provides +2.5 V output or accepts external +2.5 V reference; requires 0.1 µF ceramic cap to AGND when using internal ref. |
| AGND (Pin 6) | Analog ground | Separate ground return for analog section; must be star-connected to DGND at single point. |
| MODE (Pin 7) | Interface selection | High = parallel mode (DB0–DB11 active); low = serial mode (RFS/SCLK/SDATA active). |
| DB11/LOW (Pin 8) | Data bit 11 / test pin | In parallel mode: MSB output; in serial mode: must be tied low for correct operation. |
| DB10/LOW (Pin 9) | Data bit 10 / test pin | In parallel mode: DB10 output; in serial mode: must be tied low. |
| DB0 (Pin 20) | Data bit 0 (LSB) | Three-state TTL-compatible output; two's complement coding for AD7892BRZ-3. |
| RD (Pin 21) | Read strobe | Active-low control enabling data bus output; must satisfy t9 = 200 ns setup before next CONVST. |
| CS (Pin 22) | Chip select | Active-low enable for parallel data access; used with RD to gate DB0–DB11 outputs. |
| EOC (Pin 23) | End-of-conversion flag | Active-low pulse (~100 ns wide) signaling valid data ready; can trigger microprocessor interrupt. |
| CONVST (Pin 24) | Conversion start | Rising-edge triggered; initiates hold mode and starts 1.47 µs conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual-rail supplies in mixed-signal systems, reducing BOM count and layout complexity. |
| Integrated track/hold amplifier | Enables accurate digitization of full-scale sine waves up to >300 kHz input bandwidth without external components. |
| Dual serial/parallel interface | Reduces FPGA/microcontroller I/O resource usage: serial mode uses only 3 pins; parallel mode delivers 12-bit data in one cycle. |
| On-chip +2.5 V reference | Provides stable, low-drift reference (±10 mV @ +25°C, 25 ppm/°C) with 5.5 kΩ output impedance - suitable for moderate-precision applications. |
| Overvoltage protection on VIN1 | Withstands ±7 V transients without latch-up or parametric shift, improving robustness in noisy industrial environments. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Real-time acquisition of current/voltage feedback from servo drives and PLC analog I/O modules. IC Role / Device Role / Timing Role: High-speed ADC capturing ±2.5 V encoder or shunt-based current signals at 600 kSPS for closed-loop position/velocity regulation. Use Value: 200 ns track/hold acquisition time ensures minimal dead time between samples, preserving phase integrity in fast-response control loops. | Use Scenario: Digitizing analog outputs from Hall-effect or resolver-to-digital converters in BLDC motor controllers. IC Role / Device Role / Timing Role: Bipolar 12-bit converter interfacing directly to isolated analog feedback paths with ±2.5 V range matching typical signal conditioning stages. Use Value: Two's complement output coding simplifies signed arithmetic in DSP-based field-oriented control algorithms without software sign extension. |
| Portable Test Equipment | Condition Monitoring Sensors |
Use Scenario: Battery-powered handheld oscilloscopes and waveform analyzers requiring low-power, high-throughput digitization. IC Role / Device Role / Timing Role: Core ADC in compact DAQ subsystem, leveraging 60 mW typical power and STANDBY mode (75 µW) for extended battery life. Use Value: Single +5 V supply and integrated reference eliminate external regulators and voltage references, shrinking PCB area and component count. | Use Scenario: Vibration and temperature sensing nodes in predictive maintenance systems deployed on rotating machinery. IC Role / Device Role / Timing Role: Signal conditioner front-end converting ±2.5 V outputs from IEPE accelerometers or RTD bridges into digital streams for wireless transmission. Use Value: ±7 V overvoltage tolerance protects against ESD and cable discharge events common in factory-floor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BN-3 | Same specs but in plastic DIP (N-24) package; higher θJA (105°C/W) vs. SOIC (75°C/W); no hermetic seal. | Suitable for lab evaluation or non-industrial prototypes where thermal performance and board space are less constrained. | Select AD7892BN-3 only when through-hole assembly or socketing is required; AD7892BRZ-3 preferred for surface-mount production. |
| ADS8325IPW | 16-bit, 100 kSPS SAR ADC; SPI-only interface; external reference required; 2.7–5.5 V supply range. | Better resolution for precision instrumentation, but lower speed and no parallel interface limits microcontroller compatibility. | Choose ADS8325IPW when resolution >12 bits is mandatory and throughput <600 kSPS suffices; AD7892BRZ-3 remains optimal for speed/interface flexibility trade-off. |
Compared with AD7892BN-3 and ADS8325IPW, AD7892BRZ-3 uniquely balances 600 kSPS throughput, SOIC packaging, integrated reference, and dual-interface support - making it the most direct fit for industrial DAQ systems needing rapid deployment and thermal reliability.
Availability
AD7892BRZ-3 is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7892BRZ-3 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, headquartered in Norwood, MA.
The AD7892 product line was designed for high-speed, low-power data acquisition in industrial, instrumentation, and embedded control systems - emphasizing integration, interface flexibility, and robustness under real-world electrical conditions.
FAQ
What is the maximum sampling rate supported by the AD7892BRZ-3?
The AD7892BRZ-3 supports a maximum throughput rate of 600 kSPS, achieved by its 1.47 µs conversion time and 200 ns track/hold acquisition time. This specification is guaranteed across the commercial temperature range (–40°C to +85°C) and applies only to the AD7892-3 variant - not the -1 or -2 versions. The AD7892BRZ-3 achieves this rate while maintaining ±1 LSB relative accuracy and two's complement output coding.
Does the AD7892BRZ-3 require an external reference voltage?
No, the AD7892BRZ-3 includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin, specified with ±10 mV error at +25°C and 25 ppm/°C temperature coefficient. A 0.1 µF ceramic capacitor to AGND is required for stability. An external reference (e.g., AD780 or REF43) may be used by connecting it to the same pin, overdriving the internal source - but it is not required for basic operation of the AD7892BRZ-3.
How does the MODE pin affect the interface behavior of the AD7892BRZ-3?
The MODE pin selects between parallel and serial operation: logic high enables 12-bit parallel output on DB0–DB11 with CS/RD/EOC handshaking; logic low activates the three-wire serial interface (RFS/SCLK/SDATA), delivering 16-bit frames (4 leading zeros + 12-bit two's complement data). Pin 7 must be hardwired before power-up; dynamic switching during operation is not supported for the AD7892BRZ-3.
What is the purpose of the STANDBY pin on the AD7892BRZ-3?
The STANDBY pin (Pin 2) controls power-down mode: logic low reduces IDD to 80 µA max (75 µW typical), cutting power consumption by >99% versus normal operation (18 mA). A minimum 30 µs delay is required after pulling STANDBY high before initiating the next CONVST pulse. This feature enables energy-efficient burst-mode acquisition in battery-powered AD7892BRZ-3 applications.
Can the AD7892BRZ-3 accept input voltages beyond its ±2.5 V range?
Yes - the AD7892BRZ-3 provides ±7 V absolute maximum rating on VIN1, allowing transient overvoltage tolerance without damage. However, accurate conversion is only guaranteed within the specified ±2.5 V range. Inputs exceeding ±2.5 V will saturate the ADC transfer function but will not cause latch-up or permanent failure, enhancing system robustness in electrically noisy environments where the AD7892BRZ-3 is deployed.
AD7892BRZ-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 600k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI, Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7892BRZ-3 FAQ
1.How can I place an order for AD7892BRZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BRZ-3 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 AD7892BRZ-3 reliable?
The price and inventory of AD7892BRZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BRZ-3 is usually 5 days.
3.What payment methods are accepted for AD7892BRZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BRZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BRZ-3?
AD7892BRZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BRZ-3 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 AD7892BRZ-3?
For technical support, including AD7892BRZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BRZ-3 requirements.
6.How does Aetrix verify that AD7892BRZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7892BRZ-3 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 AD7892BRZ-3 meets industry standards.
7.What is the process for return or replacement of AD7892BRZ-3?
All AD7892BRZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BRZ-3, 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 AD7892BRZ-3 part is unused and in its original packaging.
Return procedure for AD7892BRZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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