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Analog Devices Inc. AD7892BRZ-1REEL
- Part No.:
- AD7892BRZ-1REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7892BRZ-1REEL.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:610
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Product details
Overview
AD7892BRZ-1REEL from Analog Devices is a 12-bit, single-supply successive approximation ADC with 500 kSPS throughput, ±5 V or ±10 V input range, on-chip track/hold amplifier, internal +2.5 V reference, and dual parallel/serial interface-designed for industrial data acquisition systems requiring high DC accuracy and robust overvoltage tolerance.
For engineers reviewing the AD7892BRZ-1REEL datasheet, AD7892BRZ-1REEL pinout, AD7892BRZ-1REEL application, or AD7892BRZ-1REEL equivalent, key selection criteria include relative accuracy (±1 LSB), bipolar zero error (±2 LSB), 400 ns track/hold acquisition time, SOIC-24 package compatibility, and support for both microprocessor parallel bus and three-wire serial interface modes.
Technical Context
The AD7892BRZ-1REEL implements a 12-bit SAR architecture with integrated track/hold, internal +2.5 V reference buffer, and programmable interface mode (parallel via MODE = HIGH or serial via MODE = LOW). Its LC2MOS process enables precision bipolar front-end performance with CMOS logic efficiency.
It supports ±5 V or ±10 V analog inputs (AD7892-1 variant), provides overvoltage protection up to ±17 V on VIN1 when VIN2 is grounded, and delivers DC accuracy specified to ±1 LSB relative accuracy and ±2 LSB bipolar zero error across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes; full 12-bit monotonicity maintained across operating temperature. |
| Throughput Rate | 500 kSPS - determined by 1.6 µs conversion time + 400 ns track/hold acquisition time; enables real-time sampling of signals up to ~200 kHz Nyquist bandwidth. |
| Analog Input Range | ±5 V or ±10 V - selectable via VIN2 grounding (±10 V) or connection to VIN1 (±5 V); supports legacy industrial sensor interfaces. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity within 1 least-significant bit over full scale, critical for calibration-sensitive measurement systems. |
| Power Consumption | 60 mW typ at +5 V - achieved via LC2MOS process; standby current ≤100 µA enables low-power wake-up architectures. |
| Reference Output | +2.5 V ±10 mV @ +25°C - buffered internal reference with 25 ppm/°C TC; decoupling with 0.1 µF ceramic capacitor required for stability. |
| Overvoltage Tolerance | ±17 V on VIN1 - protects against transient surges in industrial field wiring without external clamping circuitry. |
Pinout & Package
AD7892BRZ-1REEL is housed in a 24-lead SOIC (R-24) package with standard 0.3" width and gull-wing leads. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | +5 V ±5% main power rail; powers analog and digital sections; requires local 0.1 µF ceramic bypass to AGND. |
| STANDBY (Pin 2) | Power mode control | Logic HIGH = active operation; LOW = standby (≤100 µA IDD); conversion must not be initiated within 30 µs of exit. |
| VIN2 (Pin 3) | Analog input configuration | Grounded for ±10 V range; tied to VIN1 for ±5 V range; must be AGND or open (not driven) for AD7892-2/3 variants. |
| VIN1 (Pin 4) | Main analog input | Accepts ±10 V or ±5 V differential input; protected to ±17 V; connects to internal track/hold amplifier input. |
| REF OUT/REF IN (Pin 5) | Reference I/O | Provides +2.5 V internal reference output (buffered, 5.5 kΩ Zout) or accepts external +2.5 V reference; requires 0.1 µF decoupling to AGND. |
| AGND (Pin 6) | Analog ground reference | Separate ground return for track/hold, DAC, comparator; must be star-connected to DGND at single point near device. |
| MODE (Pin 7) | Interface selection | HIGH = parallel mode (DB0–DB11 active); LOW = serial mode (RFS/SCLK/SDATA active); determines pin function mapping. |
| DB11/LOW (Pin 8) | Data bit 11 / test pin | In parallel mode: MSB output (TTL-compatible, 3-state); in serial mode: must be tied LOW for functional operation. |
| DB10/LOW (Pin 9) | Data bit 10 / test pin | In parallel mode: DB10 output; in serial mode: must be tied LOW; unused in serial configuration. |
| CONVST (Pin 24) | Conversion start trigger | Rising-edge sensitive; initiates track→hold transition and starts conversion sequence; aperture delay ≤15 ns. |
Key Features
| Feature | Design Value |
|---|---|
| Dual interface flexibility | Selectable parallel (12-bit bus) or three-wire serial (RFS/SCLK/SDATA) via MODE pin-enables direct connection to microcontrollers or FPGA-based systems without glue logic. |
| Bipolar input scaling | Hardware-configurable ±5 V or ±10 V input range via VIN2 connection-eliminates need for external signal conditioning in industrial voltage monitoring applications. |
| Integrated track/hold | 200 ns (AD7892-3) or 400 ns (AD7892-1/2) acquisition time-ensures full 12-bit settling before next conversion, supporting deterministic sampling intervals. |
| On-chip +2.5 V reference | ±10 mV initial error, 25 ppm/°C TC, 5.5 kΩ output impedance-reduces BOM count and layout complexity while maintaining gain accuracy within ±0.4% over temperature. |
| ±17 V analog overvoltage protection | Robust input structure withstands field transients without latch-up or parametric shift-critical for PLC analog input modules deployed in harsh EMI environments. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous voltage monitoring of 4–20 mA loop receivers and thermocouple signal conditioners in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 12-bit digitizer capturing ±10 V sensor outputs at 500 kSPS with synchronized CONVST triggering from PLC scan cycle. Use Value: ±1 LSB relative accuracy and ±2 LSB bipolar zero error enable sub-0.025% full-scale measurement repeatability across temperature without per-unit calibration. |
Use Scenario: Digitizing calibrated reference waveforms in benchtop multimeters and automated test equipment (ATE) channel cards. IC Role / Device Role / Timing Role: High-fidelity ADC core interfaced via parallel bus to FPGA controller; EOC signal used for precise timestamping of sample capture events. Use Value: Internal +2.5 V reference with 25 ppm/°C TC ensures stable full-scale definition over ambient temperature swings, reducing system-level drift compensation burden. |
| Motor Drive Current Sensing | Power Quality Analyzers |
Use Scenario: Isolated shunt-based phase current sampling in servo drive inverters with fast transient response requirements. IC Role / Device Role / Timing Role: ADC acquiring ±5 V isolated amplifier outputs; STANDBY pin used for dynamic power gating between motor commutation cycles. Use Value: 400 ns track/hold acquisition time allows accurate capture of high-di/dt current edges without slew-induced distortion, preserving harmonic content up to 250 kHz. |
Use Scenario: Simultaneous voltage and current waveform capture in DIN-rail mounted power analyzers measuring harmonics and flicker per IEC 61000-4-30. IC Role / Device Role / Timing Role: Dual-channel acquisition subsystem (paired AD7892BRZ-1REEL units) synchronized via shared CONVST; serial interface reduces PCB routing congestion. Use Value: ±17 V overvoltage tolerance eliminates need for external TVS diodes on mains-connected inputs, improving long-term reliability in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, single-supply SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BN-1 | Same SOIC-24 package and electrical specs; A-grade (–40°C to +85°C), but N-24 plastic DIP package instead of R-24 SOIC. | Not suitable for surface-mount production; requires through-hole assembly and larger board area. | Select AD7892BN-1 only if legacy DIP footprint compatibility is mandatory and thermal performance permits. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, +2.7 V to +5.25 V supply; no internal reference; requires external REF. | Lacks dual interface, overvoltage protection, and integrated reference-increases external component count and design validation effort. | Choose ADS7822U only when ultra-low power (<1 mW) and minimal pin count outweigh need for robustness and ease of integration. |
Compared with AD7892BN-1 and ADS7822U, the AD7892BRZ-1REEL uniquely combines SOIC-24 surface-mount compatibility, ±17 V overvoltage tolerance, internal +2.5 V reference, and hardware-selectable parallel/serial interface-making it optimal for space-constrained, high-reliability industrial data loggers where layout simplicity and field survivability are prioritized.
Availability
AD7892BRZ-1REEL is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, motor drive current sensing, and power quality analyzers requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for AD7892BRZ-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7892BRZ-1REEL belongs to Analog Devices' precision data acquisition IC product line, engineered specifically for high-accuracy, single-supply industrial measurement systems demanding robustness, low power, and flexible microprocessor interfacing.
FAQ
What is the maximum analog input voltage the AD7892BRZ-1REEL can tolerate without damage?
The AD7892BRZ-1REEL provides ±17 V overvoltage protection on VIN1 when VIN2 is grounded-this is a hard fault-tolerance specification, not an operating range. It ensures survival during transient surges such as inductive kickback or ESD events in industrial field wiring, while normal operation remains limited to ±5 V or ±10 V full-scale input ranges.
Does the AD7892BRZ-1REEL require an external reference, or does it include one?
The AD7892BRZ-1REEL includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin. When used, it requires only a 0.1 µF ceramic capacitor to AGND for stability. An external +2.5 V reference (e.g., AD780 or REF43) may be connected to this same pin to override the internal source for higher precision or system-level reference synchronization.
How does the MODE pin affect the functionality of the AD7892BRZ-1REEL?
The MODE pin selects between two mutually exclusive interface modes: logic HIGH configures all DBx pins (except DB11/LOW and DB10/LOW) as active 12-bit parallel outputs; logic LOW reassigns DB3/RFS, DB4/SCLK, and DB5/SDATA as serial interface signals and requires DB11/LOW and DB10/LOW to be tied LOW for correct operation.
What is the significance of the "B" grade in AD7892BRZ-1REEL?
The "B" in AD7892BRZ-1REEL denotes the relative accuracy grade: ±1 LSB maximum relative accuracy (endpoint nonlinearity) over temperature, compared to "A" grade parts which specify typical but not guaranteed performance. This grade is confirmed in the Ordering Guide and applies to both SOIC (R-24) and DIP (N-24) packages.
Can the AD7892BRZ-1REEL operate from a supply voltage other than +5 V?
No-the AD7892BRZ-1REEL is specified only for +5 V ±5% operation (i.e., 4.75 V to 5.25 V). Absolute maximum ratings allow VDD up to +7 V, but electrical performance-including conversion time, accuracy, and reference stability-is guaranteed exclusively within the +5 V ±5% range per the datasheet test conditions.
AD7892BRZ-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:
- -
AD7892BRZ-1REEL FAQ
1.How can I place an order for AD7892BRZ-1REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BRZ-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 AD7892BRZ-1REEL reliable?
The price and inventory of AD7892BRZ-1REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BRZ-1REEL is usually 5 days.
3.What payment methods are accepted for AD7892BRZ-1REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BRZ-1REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BRZ-1REEL?
AD7892BRZ-1REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BRZ-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 AD7892BRZ-1REEL?
For technical support, including AD7892BRZ-1REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BRZ-1REEL requirements.
6.How does Aetrix verify that AD7892BRZ-1REEL is sourced from the original manufacturer or authorized distributors?
All AD7892BRZ-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 AD7892BRZ-1REEL meets industry standards.
7.What is the process for return or replacement of AD7892BRZ-1REEL?
All AD7892BRZ-1REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BRZ-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 AD7892BRZ-1REEL part is unused and in its original packaging.
Return procedure for AD7892BRZ-1REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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