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Analog Devices Inc. AD7892ARZ-1REEL
- Part No.:
- AD7892ARZ-1REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7892ARZ-1REEL.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:251
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Product details
Overview
AD7892ARZ-1REEL from Analog Devices is a 12-bit, single-supply successive approximation ADC with 500 kSPS throughput, on-chip track/hold amplifier, internal +2.5 V reference, and dual serial/parallel interface. It supports ±5 V or ±10 V analog input ranges and operates from +5 V ±5%, consuming 60 mW typical power. It is used in industrial data acquisition systems requiring high-speed, low-power digitization of bipolar signals.
For engineers reviewing the AD7892ARZ-1REEL datasheet, AD7892ARZ-1REEL pinout, AD7892ARZ-1REEL application, or AD7892ARZ-1REEL equivalent, key selection criteria include its ±10 V input range capability, 500 kSPS sampling rate, 12-bit resolution with ±1.5 LSB relative accuracy, SOIC-24 package compatibility, and support for both microprocessor parallel bus and three-wire serial interface modes.
Technical Context
The AD7892ARZ-1REEL implements a 1.6 µs conversion time with 400 ns track/hold acquisition time, enabling stable 500 kSPS operation. Its LC2MOS process integrates precision bipolar front-end circuitry with low-power CMOS logic for optimized dynamic performance.
It features dual interface mode selection via the MODE pin: parallel mode outputs DB0–DB11 as TTL-compatible three-state data lines, while serial mode repurposes DB3/RFS, DB4/SCLK, and DB5/SDATA for frame-synchronized 16-bit serial output (4 leading zeros + 12 valid bits) with two's complement coding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes over full scale; enables 1 part in 4096 voltage quantization. |
| Sampling Rate | 500 kSPS - supports real-time capture of signals up to 250 kHz Nyquist bandwidth. |
| Analog Input Range | ±10 V or ±5 V - selectable via VIN2 connection; ±10 V range allows direct digitization of standard industrial sensor outputs. |
| Reference | +2.5 V internal - buffered output with ±10 mV error at +25°C; decoupling with 0.1 µF ceramic capacitor to AGND required. |
| Power Consumption | 60 mW typical at +5 V - enables portable and thermally constrained embedded designs without active cooling. |
| DC Accuracy | ±1.5 LSB relative accuracy - ensures monotonicity and <0.037% full-scale linearity error across temperature. |
| Overvoltage Protection | ±17 V on VIN1 - prevents damage during transient surges or miswiring in field-deployed instrumentation. |
Pinout & Package
AD7892ARZ-1REEL is housed in a 24-lead SOIC (R-24) package with 0.3" body width and standard 0.050" lead pitch. Pin 1 is located at the top-left corner when viewing the top side with the marking notch or dot oriented left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | +5 V ±5% main power rail; must be decoupled locally to DGND/AGND with ≥0.1 µF ceramic capacitor. |
| STANDBY (Pin 2) | Power mode control | Logic high = active mode; logic low = standby (75 µW typical), enabling rapid wake-up within 30 µs. |
| VIN2 (Pin 3) | Analog input configuration | Grounded for ±10 V range at VIN1; tied to VIN1 for ±5 V range; must be AGND for AD7892-2/3 variants. |
| VIN1 (Pin 4) | Main analog input | Accepts ±10 V (VIN2 grounded) or ±5 V (VIN2 = VIN1); protected to ±17 V without damage. |
| REF OUT/REF IN (Pin 5) | Reference interface | Provides +2.5 V internal reference or accepts external +2.5 V source; requires 0.1 µF decoupling to AGND when using internal ref. |
| AGND (Pin 6) | Analog ground reference | Separate ground return for track/hold, DAC, and comparator; must be star-connected to minimize noise coupling. |
| MODE (Pin 7) | Interface selection | Logic high = parallel mode (DB0–DB11 active); logic low = serial mode (DB3/RFS, DB4/SCLK, DB5/SDATA active). |
| DB11/LOW (Pin 8) | Data bit 11 / test pin | In parallel mode: MSB output; in serial mode: must be hard-wired low for correct operation. |
| DB10/LOW (Pin 9) | Data bit 10 / test pin | In parallel mode: DB10 output; in serial mode: must be hard-wired low for correct operation. |
| DB0 (Pin 20) | Data bit 0 (LSB) | Three-state TTL-compatible output; coding is two's complement for AD7892ARZ-1REEL (variant -1). |
| RD (Pin 21) | Read strobe | Active-low control that, with CS low, enables DB0–DB11 outputs; timing critical for bus access (t6 ≤ 40 ns max). |
| CS (Pin 22) | Chip select | Active-low enable for data bus; must be asserted before RD to avoid bus contention. |
| EOC (Pin 23) | End-of-conversion flag | Active-low pulse (~100 ns wide) signaling completion; usable as interrupt trigger for microprocessor synchronization. |
| CONVST (Pin 24) | Conversion start | Rising-edge-triggered command that initiates hold mode and ADC conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual ±15 V rails common in legacy data acquisition, reducing BOM count and board area. |
| On-chip track/hold amplifier | Acquires ±10 V full-scale sine wave to 12-bit accuracy in ≤400 ns, enabling accurate sampling without external THS. |
| Dual serial/parallel interface | MODE-pin-selectable connectivity allows reuse across microcontroller (serial) and FPGA/microprocessor (parallel) platforms. |
| ±17 V analog input overvoltage protection | Prevents latch-up or permanent damage during ESD events or wiring faults in industrial environments. |
| Internal +2.5 V reference | Reduces system component count and improves gain stability vs. external references subject to PCB layout parasitics. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous digitization of ±10 V outputs from strain-gauge load cells and RTD transmitters in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC capturing sensor data at 500 kSPS with synchronized CONVST/EOC handshaking for deterministic latency. Use Value: Enables real-time closed-loop control with sub-2 µs conversion + acquisition cycle, meeting IEC 61131-3 scan-time requirements. | Use Scenario: High-fidelity waveform capture in portable oscilloscopes and automated test equipment (ATE) racks. IC Role / Device Role / Timing Role: Front-end digitizer interfaced via parallel bus to FPGA-based acquisition engine for low-latency data streaming. Use Value: 12-bit resolution and 70 dB SNR support accurate reconstruction of 100 kHz fundamentals with minimal harmonic distortion. |
| Motor Drive Current Sensing | Energy Metering Front-End |
Use Scenario: Isolated phase-current measurement in servo drives using shunt resistors and ±10 V op-amp conditioning stages. IC Role / Device Role / Timing Role: Bipolar-input ADC acquiring current samples synchronized to PWM switching edges via CONVST triggering. Use Value: ±17 V input tolerance accommodates common-mode transients during IGBT switching, improving system robustness. | Use Scenario: Digitizing scaled voltage/current waveforms in Class 0.5 smart electricity meters compliant with IEC 62053-21. IC Role / Device Role / Timing Role: Precision ADC operating from isolated +5 V rail, using internal reference to minimize gain drift over temperature. Use Value: ±1.5 LSB relative accuracy and ±4 LSB full-scale error ensure metering accuracy remains within specified tolerance bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, medium-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ-1 | Same SOIC-24 package and pinout; ±1 LSB relative accuracy (vs. ±1.5 LSB for AD7892ARZ-1REEL). | Required where tighter DC linearity is critical, e.g., calibration-grade instrumentation. | Select AD7892BRZ-1 if system-level calibration budget demands <±1 LSB endpoint nonlinearity. |
| 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. | Choose ADS8320U only when resolution >12-bit is mandatory and 500 kSPS is unnecessary. |
Compared with AD7892BRZ-1, AD7892ARZ-1REEL trades 0.5 LSB linearity for broader availability and lower cost; compared with ADS8320U, it delivers 5× higher throughput and integrated reference at the expense of resolution and interface flexibility.
Availability
AD7892ARZ-1REEL is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, motor drive current sensing, and energy metering front-end applications requiring stable component supply and long-term production continuity.
Supply support for AD7892ARZ-1REEL 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 AD7892 product line was designed for high-speed, low-power data acquisition in industrial and instrumentation systems requiring single-supply operation, integrated signal conditioning, and flexible microprocessor interfacing.
FAQ
What is the maximum analog input voltage the AD7892ARZ-1REEL can tolerate without damage?
The AD7892ARZ-1REEL provides ±17 V overvoltage protection on VIN1 when configured for ±10 V input range (VIN2 grounded). This protects against transient surges and miswiring in industrial environments. Exceeding ±17 V may cause permanent damage per Absolute Maximum Ratings. The AD7892ARZ-1REEL specification sheet confirms this rating applies specifically to the AD7892-1 variant, which AD7892ARZ-1REEL implements.
Does the AD7892ARZ-1REEL require an external reference, or does it have an internal one?
The AD7892ARZ-1REEL includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin. When used, it must be decoupled to AGND with a 0.1 µF ceramic capacitor. The internal reference has ±10 mV error at +25°C and 25 ppm/°C tempco. An external +2.5 V reference (e.g., AD780) can overdrive this pin if higher precision is needed. The AD7892ARZ-1REEL datasheet explicitly states internal reference functionality for the -1 variant.
How do I configure the AD7892ARZ-1REEL for ±10 V input range?
To configure AD7892ARZ-1REEL for ±10 V input range, connect VIN2 (Pin 3) to AGND (Pin 6) and apply the analog signal to VIN1 (Pin 4). This configuration is defined in the AD7892ARZ-1REEL functional description and pin function table. Do not connect VIN2 to any voltage other than AGND or VIN1, as incorrect biasing will invalidate the input range specification.
What interface modes does the AD7892ARZ-1REEL support, and how are they selected?
The AD7892ARZ-1REEL supports both parallel (12-bit DB0–DB11) and three-wire serial (RFS/SCLK/SDATA) interfaces. Mode selection is controlled by the MODE pin (Pin 7): logic high enables parallel mode; logic low enables serial mode. In serial mode, DB11/LOW and DB10/LOW (Pins 8 and 9) must be hard-wired low. This behavior is documented in the AD7892ARZ-1REEL pin function description and timing diagrams.
What is the power consumption of the AD7892ARZ-1REEL in standby mode?
In standby mode (STANDBY = logic low), the AD7892ARZ-1REEL consumes 75 µW typical (100 µA max at +5 V), reducing total power to <0.1 mW. This enables rapid wake-up (<30 µs) for duty-cycled data acquisition systems. The AD7892ARZ-1REEL datasheet specifies this value for the -1 variant in the POWER REQUIREMENTS section under Standby Mode.
AD7892ARZ-1REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-1REEL FAQ
1.How can I place an order for AD7892ARZ-1REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892ARZ-1REEL 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-1REEL reliable?
The price and inventory of AD7892ARZ-1REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892ARZ-1REEL is usually 5 days.
3.What payment methods are accepted for AD7892ARZ-1REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892ARZ-1REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892ARZ-1REEL?
AD7892ARZ-1REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892ARZ-1REEL 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-1REEL?
For technical support, including AD7892ARZ-1REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892ARZ-1REEL requirements.
6.How does Aetrix verify that AD7892ARZ-1REEL is sourced from the original manufacturer or authorized distributors?
All AD7892ARZ-1REEL 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-1REEL meets industry standards.
7.What is the process for return or replacement of AD7892ARZ-1REEL?
All AD7892ARZ-1REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7892ARZ-1REEL, 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-1REEL part is unused and in its original packaging.
Return procedure for AD7892ARZ-1REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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