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Analog Devices Inc. AD7892ARZ-3
- Part No.:
- AD7892ARZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7892ARZ-3.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
AD7892ARZ-3 from Analog Devices is a 12-bit, single-supply successive approximation ADC with ±2.5 V analog input range, 1.47 µs conversion time, and 600 kSPS throughput rate. It integrates on-chip track/hold, internal +2.5 V reference, and dual serial/parallel interface - enabling high-speed data acquisition in portable instrumentation and industrial control systems.
For engineers reviewing the AD7892ARZ-3 datasheet, AD7892ARZ-3 pinout, AD7892ARZ-3 application, or AD7892ARZ-3 equivalent, key selection considerations include its LC2MOS process-based low-power operation (60 mW typ), bipolar input scaling, 200 ns track/hold acquisition time, and SOIC-24 package compatibility with microcontroller and DSP interfacing.
Technical Context
The AD7892ARZ-3 implements a 12-bit SAR architecture with integrated track/hold amplifier optimized for ±2.5 V full-scale differential input. Its LC2MOS process combines precision bipolar front-end circuitry with low-power CMOS logic to achieve 70 dB SNR and –78 dB THD at 100 kHz input frequency and 600 kSPS sampling.
Interface flexibility is enabled by MODE-pin-selectable operation: parallel mode delivers 12-bit TTL-compatible outputs (DB0–DB11) with 35 ns data access time, while serial mode provides three-wire RFS/SCLK/SDATA communication with 16-bit frame format (4 leading zeros + 12 valid bits) and two's complement output coding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic transfer function with no missing codes over temperature. |
| Conversion Time | 1.47 µs max - enables maximum sampling rate of 600 kSPS without pipeline latency. |
| Analog Input Range | ±2.5 V - supports bipolar signal conditioning directly from transducer outputs without external scaling. |
| Reference | +2.5 V internal - buffered output with ±10 mV error at +25°C and 25 ppm/°C tempco; usable as system reference source. |
| Power Consumption | 60 mW typical at +5 V - achieved via LC2MOS process and standby mode (75 µW typ) for battery-powered systems. |
| Dynamic Performance | 70 dB SNR, –78 dB THD @ 100 kHz - meets requirements for medium-fidelity sensor digitization and closed-loop control feedback. |
| Digital Interface | Parallel (12-bit) or serial (3-wire RFS/SCLK/SDATA) - MODE pin selects protocol; no external glue logic required. |
Pinout & Package
AD7892ARZ-3 is housed in a 24-lead SOIC (R-24) package with standard 0.3" width and 0.050" lead pitch. Pin functions are electrically validated per Analog Devices' official pin description table and functional block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply | +5 V ±5% main power rail; powers analog and digital sections simultaneously. |
| STANDBY (Pin 2) | Power mode control | Logic high = active; logic low = standby (75 µW typ), requiring 30 µs wake-up before next CONVST. |
| VIN2 (Pin 3) | Analog input reference | Must be tied to AGND for AD7892ARZ-3; floating or driven externally invalidates input range specification. |
| VIN1 (Pin 4) | Main analog input | Accepts ±2.5 V differential input; overvoltage tolerant to ±7 V without damage. |
| REF OUT/REF IN (Pin 5) | Reference I/O | Provides +2.5 V internal reference (5.5 kΩ output impedance) or accepts external 2.375–2.625 V source. |
| AGND (Pin 6) | Analog ground | Separate return path for track/hold, DAC, and comparator; 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 / test pin | In parallel mode: MSB output; in serial mode: must be hard-wired low for correct operation. |
| DB10/LOW (Pin 9) | Data bit / test pin | In parallel mode: DB10 output; in serial mode: must be hard-wired low. |
| DB0 (Pin 20) | LSB output | Three-state TTL-compatible output; two's complement coding for bipolar ±2.5 V range. |
| RD (Pin 21) | Read strobe | Active-low control enabling data bus output; requires 200 ns setup before next CONVST rising edge. |
| CS (Pin 22) | Chip select | Active-low enable for parallel data output; used with RD to gate DB0–DB11 drivers. |
| EOC (Pin 23) | End-of-conversion flag | Active-low pulse (~100 ns wide) signaling completion; usable as interrupt trigger for microcontrollers. |
| CONVST (Pin 24) | Conversion start | Rising-edge-triggered command initiating track-to-hold transition and SAR cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual ±15 V rails or charge pumps - reduces BOM count and PCB area in portable designs. |
| Integrated track/hold amplifier | Acquires ±2.5 V input to 12-bit accuracy within 200 ns - supports full-scale sine wave digitization up to >300 kHz input bandwidth. |
| On-chip +2.5 V reference | ±10 mV initial error and 25 ppm/°C drift - sufficient for 12-bit accuracy without external reference in cost-sensitive applications. |
| Bipolar input overvoltage protection | Withstands ±7 V on VIN1 without latch-up or parametric shift - simplifies front-end protection in noisy industrial environments. |
| MODE-selectable dual interface | Parallel mode for high-throughput microprocessor buses; serial mode for direct connection to MCU UART/SPI peripherals - no level-shifting needed. |
Applications
| Portable Data Loggers | Industrial Process Controllers |
|---|---|
Use Scenario: Battery-powered field instruments acquiring voltage outputs from strain gauges, RTDs, and pressure transducers. IC Role / Device Role / Timing Role: Primary ADC converting ±2.5 V sensor signals at 600 kSPS with internal reference and low-power standby between samples. Use Value: 60 mW typical power and 75 µW standby enable >100-hour runtime on AA cells; SOIC-24 footprint eases layout in space-constrained enclosures. | Use Scenario: Real-time closed-loop control of motor drives and valve actuators using analog feedback signals. IC Role / Device Role / Timing Role: High-speed acquisition node feeding FPGA or DSP with synchronized 12-bit samples for PID computation. Use Value: 1.47 µs conversion + 200 ns acquisition ensures deterministic 1.67 µs sample period; parallel interface delivers data without serial framing overhead. |
| Automotive Diagnostic Tools | Medical Sensor Interfaces |
Use Scenario: Handheld OBD-II scanners capturing analog waveforms from engine sensors (TPS, MAP, O2). IC Role / Device Role / Timing Role: Robust ADC handling ±7 V transients on vehicle harnesses while maintaining 12-bit linearity. Use Value: Built-in ±7 V overvoltage tolerance eliminates need for external TVS diodes on VIN1; LC2MOS process ensures stable performance across –40°C to +85°C. | Use Scenario: Patient monitoring devices digitizing low-amplitude biopotential signals (ECG, EMG) with minimal added noise. IC Role / Device Role / Timing Role: Precision front-end ADC accepting ±2.5 V inputs from instrumentation amplifiers with 70 dB SNR. Use Value: 70 dB SNR and –78 dB THD meet IEC 60601-2-27 requirements for diagnostic-grade signal fidelity at 100 kHz bandwidth. |
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 SOIC-24 package and ±2.5 V input range, but specified for ±1 LSB relative accuracy (vs. ±1.5 LSB for AD7892ARZ-3). | Required where endpoint nonlinearity must be guaranteed ≤±1 LSB across temperature. | Select AD7892BN-3 when tighter DC accuracy is mandatory; AD7892ARZ-3 suffices for most dynamic-signal applications. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, +2.7–5.25 V supply; no internal reference or overvoltage protection. | Suitable for lower-speed, low-voltage embedded systems where serial simplicity outweighs speed and robustness needs. | Choose ADS7822U only if 600 kSPS and ±7 V tolerance are unnecessary; AD7892ARZ-3 offers superior speed, ruggedness, and interface flexibility. |
Compared with AD7892BN-3, AD7892ARZ-3 trades guaranteed ±1 LSB linearity for broader commercial availability and lower cost; versus ADS7822U, it delivers 3× higher throughput, integrated reference, and industrial-grade overvoltage resilience - making it optimal for demanding real-time acquisition.
Availability
AD7892ARZ-3 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process controllers, and automotive diagnostic tools requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for AD7892ARZ-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, serving industrial, automotive, communications, and healthcare markets.
The AD7892 product line delivers single-supply, high-speed SAR ADCs optimized for low-power, high-accuracy data acquisition in space- and energy-constrained systems - with the AD7892ARZ-3 specifically targeting 600 kSPS bipolar measurement applications.
FAQ
What is the maximum sampling rate supported by the AD7892ARZ-3?
The AD7892ARZ-3 supports a maximum throughput rate of 600 kSPS, enabled by its 1.47 µs conversion time and 200 ns track/hold acquisition time. This allows deterministic sampling intervals down to 1.67 µs, making AD7892ARZ-3 suitable for real-time control loops and high-frequency waveform capture without pipeline delay artifacts.
Does the AD7892ARZ-3 require an external reference voltage?
No, the AD7892ARZ-3 includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin, with ±10 mV error at +25°C and 25 ppm/°C temperature coefficient. An external reference is optional and only needed when tighter initial accuracy or lower drift is required; AD7892ARZ-3 operates fully functional with its internal reference.
How does the MODE pin affect the AD7892ARZ-3 interface configuration?
The MODE pin selects between parallel and serial operation: logic high enables 12-bit parallel output on DB0–DB11 with CS/RD handshaking; logic low activates three-wire serial mode using DB3/RFS, DB4/SCLK, and DB5/SDATA. Pins DB8–DB11 become no-connect in serial mode, and DB10/LOW and DB11/LOW must be tied low - a hardware-configurable feature unique to AD7892ARZ-3.
What is the analog input overvoltage rating for the AD7892ARZ-3?
The AD7892ARZ-3 VIN1 input is rated for ±7 V absolute maximum voltage relative to AGND, exceeding its ±2.5 V operating range. This overvoltage tolerance protects the ADC from transient spikes in industrial or automotive environments without requiring external clamping components - a verified specification confirmed in the Absolute Maximum Ratings table.
Can the AD7892ARZ-3 operate from a supply voltage other than +5 V?
No - the AD7892ARZ-3 is specified exclusively for +5 V ±5% operation (i.e., 4.75 V to 5.25 V). Operation outside this range violates Absolute Maximum Ratings and may cause parametric shift or permanent damage. The LC2MOS process and internal reference design are tightly coupled to +5 V, and no alternate supply configurations are supported per datasheet.
AD7892ARZ-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:
- -
AD7892ARZ-3 FAQ
1.How can I place an order for AD7892ARZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892ARZ-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 AD7892ARZ-3 reliable?
The price and inventory of AD7892ARZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892ARZ-3 is usually 5 days.
3.What payment methods are accepted for AD7892ARZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892ARZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892ARZ-3?
AD7892ARZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892ARZ-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 AD7892ARZ-3?
For technical support, including AD7892ARZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892ARZ-3 requirements.
6.How does Aetrix verify that AD7892ARZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7892ARZ-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 AD7892ARZ-3 meets industry standards.
7.What is the process for return or replacement of AD7892ARZ-3?
All AD7892ARZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892ARZ-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 AD7892ARZ-3 part is unused and in its original packaging.
Return procedure for AD7892ARZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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