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Analog Devices Inc. AD7892ARZ-1
- Part No.:
- AD7892ARZ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7892ARZ-1.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
AD7892ARZ-1 from Analog Devices is a 12-bit, single-supply successive approximation ADC with 500 kSPS throughput, ±10 V or ±5 V input range, on-chip track/hold amplifier, and dual serial/parallel interface - used in industrial data acquisition systems requiring high-speed analog monitoring under +5 V supply constraints.
For engineers reviewing the AD7892ARZ-1 datasheet, AD7892ARZ-1 pinout, AD7892ARZ-1 application, or AD7892ARZ-1 equivalent, key selection considerations include input range configuration (±10 V/±5 V), standby power consumption (80 µA max), relative accuracy (±1.5 LSB), conversion time (1.6 µs), and SOIC-24 package compatibility with microcontroller-based signal conditioning designs.
Technical Context
The AD7892ARZ-1 implements a 12-bit SAR architecture with integrated track/hold, internal +2.5 V reference, and configurable MODE pin selecting between parallel (12-bit TTL-compatible DB0–DB11) and three-wire serial (RFS/SCLK/SDATA) interfaces. Its LC2MOS process enables bipolar precision with CMOS logic efficiency.
Analog input scaling supports ±10 V (VIN1 to AGND) or ±5 V (VIN1 to VIN2) ranges via external VIN2 connection; overvoltage tolerance extends to ±17 V on VIN1. Conversion is triggered by CONVST rising edge, with EOC pulse signaling completion and RD/CS enabling parallel data readout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes across full operating temperature range. |
| Throughput Rate | 500 kSPS - determined by 1.6 µs conversion time + 400 ns track/hold acquisition. |
| Analog Input Range | ±10 V or ±5 V - selected by VIN2 grounding or connection to VIN1; ±17 V overvoltage protection on VIN1. |
| Reference | +2.5 V internal - buffered output at REF OUT/REF IN pin; ±10 mV error at +25°C; 25 ppm/°C tempco. |
| Power Consumption | 60 mW typical at +5 V - 12 mA IDD in normal mode; 80 µA max in standby. |
| DC Accuracy | ±1.5 LSB relative accuracy - ensures monotonicity and linearity for precision measurement applications. |
| Digital Interface | Parallel (12-bit) or 3-wire serial - MODE pin selects interface; serial outputs 16-bit frame (4 leading zeros + 12 data bits). |
Pinout & Package
AD7892ARZ-1 is housed in a 24-lead SOIC (R-24) package with standard 0.3" width and gull-wing leads. Pin 1 is located at top-left corner (notch-marked side), with pin numbering counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive Supply | +5 V ±5% main power rail; powers analog and digital sections. |
| STANDBY (Pin 2) | Power Control | Logic-high enables operation; logic-low reduces IDD to ≤80 µA for low-power sleep. |
| VIN2 (Pin 3) | Analog Range Selector | Grounded for ±10 V range; tied to VIN1 for ±5 V range; must be AGND for AD7892-2/3. |
| VIN1 (Pin 4) | Main Analog Input | Primary signal input; accepts ±10 V, ±5 V, or ±2.5 V depending on variant and VIN2 configuration. |
| REF OUT/REF IN (Pin 5) | Reference Node | Provides +2.5 V internal reference or accepts external 2.375–2.625 V source; requires 0.1 µF decoupling to AGND. |
| AGND (Pin 6) | Analog Ground | Separate ground return for track/hold, comparator, and DAC; must be isolated from DGND at PCB level. |
| MODE (Pin 7) | Interface Selector | High = parallel mode (DB0–DB11 active); low = serial mode (RFS/SCLK/SDATA active). |
| DB11/LOW (Pin 8) | Data Bit 11 / Test | MSB in parallel mode; must be tied low in serial mode for correct operation. |
| DB10/LOW (Pin 9) | Data Bit 10 / Test | Second MSB in parallel mode; must be tied low in serial mode. |
| DB0 (Pin 20) | Data Bit 0 (LSB) | LSB output in parallel mode; two's complement coding for AD7892ARZ-1. |
| RD (Pin 21) | Read Strobe | Active-low control enabling three-state data bus; used with CS to latch conversion result. |
| CS (Pin 22) | Chip Select | Active-low enable for parallel data outputs; must be held low during RD assertion. |
| EOC (Pin 23) | End-of-Conversion | Active-low pulse (~100 ns wide) indicating valid data ready in output register. |
| CONVST (Pin 24) | Convert Start | Rising-edge-triggered command initiating track-to-hold transition and ADC conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual ±15 V rails - simplifies power design in portable and embedded DAQ systems. |
| Configurable ±10 V / ±5 V input range | Hardware-selectable via VIN2 connection - supports legacy sensor interfaces without external signal conditioning. |
| Integrated +2.5 V reference with ±10 mV error | Reduces BOM count and layout complexity while maintaining gain accuracy within ±0.4% over temperature. |
| Two interface modes (parallel + serial) | Enables direct connection to both microprocessors (via 12-bit bus) and microcontrollers (via SPI-compatible 3-wire interface). |
| ±17 V analog input overvoltage protection | Prevents damage from transient surges in industrial environments - no external clamping diodes required. |
| 12-bit monotonicity guaranteed | Ensures error-free code transitions across full scale - critical for closed-loop control and feedback applications. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous voltage monitoring of motor phase currents and temperature sensor outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Primary 12-bit ADC digitizing ±10 V analog signals at 500 kSPS with synchronized CONVST triggering. Use Value: Enables real-time fault detection with <1.6 µs conversion latency and ±1.5 LSB linearity for accurate RMS calculation. |
Use Scenario: Digitizing waveform inputs in handheld multimeters and benchtop oscilloscopes with battery-powered operation. IC Role / Device Role / Timing Role: High-speed sampling front-end with standby mode activated between measurements to extend battery life. Use Value: 80 µA standby current and 60 mW active power allow >10-hour runtime on AA cells while maintaining 12-bit resolution. |
| Automotive Sensor Signal Conditioning | Medical Instrumentation |
Use Scenario: Acquisition of throttle position, brake pressure, and exhaust gas oxygen sensor outputs in engine control units. IC Role / Device Role / Timing Role: Robust analog interface handling ±17 V transients during load dump events without protection circuitry. Use Value: Built-in overvoltage tolerance eliminates discrete TVS components, reducing board area and qualification effort. |
Use Scenario: Isolated patient-connected ECG front-ends requiring precise DC-coupled biopotential measurement. IC Role / Device Role / Timing Role: Precision ADC capturing low-amplitude (±5 V range), low-noise biosignals with minimal offset drift. Use Value: ±3 LSB bipolar zero error and 70 dB SNR ensure diagnostic-grade fidelity for ST-segment analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BN-1 | Same SOIC-24 package and ±10 V/±5 V range, but specified for ±1 LSB relative accuracy (vs. ±1.5 LSB for AD7892ARZ-1). | Preferred where tighter linearity is required for calibration-critical instrumentation. | Select AD7892BN-1 when absolute accuracy dominates cost and availability trade-offs. |
| ADS8320U | 16-bit, 100 kSPS, SPI-only interface, no internal reference - requires external +2.5 V reference and level-shifting for +5 V systems. | Suitable for higher-resolution, lower-throughput applications where serial simplicity outweighs speed and integration. | Choose ADS8320U only if resolution >12 bits is mandatory and system can accommodate external reference and slower sampling. |
Compared with AD7892BN-1, AD7892ARZ-1 trades 0.5 LSB linearity for broader commercial temperature range availability and lower unit cost; versus ADS8320U, it delivers 5× higher throughput and full integration at the expense of resolution - making AD7892ARZ-1 optimal for cost-sensitive, medium-speed industrial DAQ.
Availability
AD7892ARZ-1 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and automotive electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for AD7892ARZ-1 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 Wilmington, MA.
The AD7892ARZ-1 belongs to Analog Devices' precision data acquisition IC family, designed specifically for high-speed, single-supply industrial and instrumentation applications demanding integrated track/hold, reference, and flexible digital interfacing.
FAQ
What input voltage ranges does the AD7892ARZ-1 support?
The AD7892ARZ-1 supports ±10 V (when VIN2 is grounded) or ±5 V (when VIN2 is tied to VIN1) analog input ranges. It features ±17 V overvoltage protection on VIN1, enabling robust operation in electrically noisy industrial environments without external clamping. The AD7892ARZ-1 does not support unipolar 0–2.5 V or bipolar ±2.5 V ranges - those are exclusive to AD7892-2 and AD7892-3 variants.
How is the reference configured on the AD7892ARZ-1?
The AD7892ARZ-1 uses its internal +2.5 V reference by default, accessible at the REF OUT/REF IN pin (Pin 5). To use it, connect a 0.1 µF ceramic capacitor from Pin 5 to AGND. For improved accuracy, an external reference (e.g., AD780 or REF43) can overdrive this pin - the part accepts 2.375 V to 2.625 V and buffers the input before routing to the ADC core.
Can the AD7892ARZ-1 operate in both parallel and serial modes simultaneously?
No - the AD7892ARZ-1 operates exclusively in one interface mode at a time, selected by the MODE pin (Pin 7). When MODE = high, DB0–DB11 function as parallel outputs and RFS/SCLK/SDATA are inactive; when MODE = low, DB0–DB11 (except DB3/RFS, DB4/SCLK, DB5/SDATA) are tri-stated and the three-wire serial interface activates. Simultaneous use is electrically prohibited and will cause undefined behavior.
What is the minimum acquisition time required after EOC before starting the next conversion on the AD7892ARZ-1?
The AD7892ARZ-1 requires a minimum track/hold acquisition time of 400 ns after the EOC falling edge before issuing the next CONVST rising edge. This ensures the internal track/hold amplifier settles to ±1/2 LSB accuracy. Initiating conversion earlier risks missing codes or increased differential nonlinearity - the timing is strictly enforced by the internal state machine and cannot be shortened via external control.
Is the AD7892ARZ-1 pin-compatible with other AD7892 variants like AD7892AR-3?
No - while all AD7892 variants share identical SOIC-24 pinouts and mechanical footprint, the AD7892ARZ-1 is not functionally interchangeable with AD7892AR-3 due to fundamental differences: AD7892ARZ-1 supports ±10 V/±5 V input ranges and 500 kSPS rate, whereas AD7892AR-3 supports ±2.5 V range and 600 kSPS. Using them interchangeably without redesigning input scaling and timing violates datasheet specifications.
AD7892ARZ-1 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):
- 500k
- 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-1 FAQ
1.How can I place an order for AD7892ARZ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892ARZ-1 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-1 reliable?
The price and inventory of AD7892ARZ-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892ARZ-1 is usually 5 days.
3.What payment methods are accepted for AD7892ARZ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892ARZ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892ARZ-1?
AD7892ARZ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892ARZ-1 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-1?
For technical support, including AD7892ARZ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892ARZ-1 requirements.
6.How does Aetrix verify that AD7892ARZ-1 is sourced from the original manufacturer or authorized distributors?
All AD7892ARZ-1 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-1 meets industry standards.
7.What is the process for return or replacement of AD7892ARZ-1?
All AD7892ARZ-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892ARZ-1, 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-1 part is unused and in its original packaging.
Return procedure for AD7892ARZ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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