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Analog Devices Inc. AD7892BRZ-1
- Part No.:
- AD7892BRZ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7892BRZ-1.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:133
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Product details
Overview
AD7892BRZ-1 from Analog Devices is a 12-bit, single-supply successive approximation ADC with 500 kSPS throughput, ±1 LSB relative accuracy, ±10 V or ±5 V input range, and integrated track/hold amplifier-designed for precision data acquisition in industrial instrumentation and sensor signal conditioning.
For engineers reviewing the AD7892BRZ-1 datasheet, AD7892BRZ-1 pinout, AD7892BRZ-1 application, or AD7892BRZ-1 equivalent, key selection considerations include its dual-range analog input support, low-power 60 mW typical operation at +5 V, serial/parallel interface flexibility via MODE pin, and SOIC-24 package compatibility with legacy DIP-based designs.
Technical Context
The AD7892BRZ-1 implements a 1.6 µs conversion time with 400 ns track/hold acquisition, enabling stable 500 kSPS sampling while maintaining ±1 LSB relative accuracy over –40°C to +85°C. Its LC2MOS process integrates bipolar precision circuitry with CMOS logic for low power and high linearity.
It features dual analog input configuration: VIN1 accepts ±10 V (VIN2 grounded) or ±5 V (VIN2 tied to VIN1); REF OUT/REF IN supports internal +2.5 V reference (±10 mV @ 25°C) or external reference overdrive; MODE pin selects between parallel (DB0–DB11) and three-wire serial (RFS/SCLK/SDATA) output modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and full-scale monotonicity for precision measurement systems. |
| Throughput Rate | 500 kSPS - enables real-time capture of signals up to ~200 kHz Nyquist bandwidth with adequate oversampling margin. |
| Analog Input Range | ±10 V or ±5 V - selectable via VIN2 connection, supporting both high-voltage industrial sensors and scaled transducer outputs. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity error ≤ ±0.024% FS, critical for calibrated measurement front-ends. |
| Power Dissipation | 60 mW typ at +5 V - allows battery-powered or thermally constrained portable instrumentation without active cooling. |
| Reference Output | +2.5 V ±10 mV @ 25°C - internal buffered reference with 25 ppm/°C TC, eliminating need for external voltage reference in cost-sensitive designs. |
| Overvoltage Protection | ±17 V on VIN1/VIN2 - prevents latch-up or damage during transient surges in industrial environments without external clamping. |
Pinout & Package
AD7892BRZ-1 is housed in a 24-lead SOIC (R-24) package with standard 0.3" body width and 1.27 mm pitch. Pin 1 is located at top-left corner when notch faces upward; thermal resistance θJA = 75°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply | +5 V ±5% main power rail; decoupling capacitor required near pin for noise immunity. |
| STANDBY (Pin 2) | Power mode control | Logic high = active mode; logic low = standby (75 µW typical), enabling rapid wake-up for burst-mode acquisition. |
| VIN2 (Pin 3) | Analog input select | Grounded for ±10 V range; tied to VIN1 for ±5 V range; must be AGND for AD7892BRZ-1 to avoid misconfiguration. |
| VIN1 (Pin 4) | Main analog input | Primary signal input with ±10 V or ±5 V range; overvoltage tolerant to ±17 V without damage. |
| REF OUT/REF IN (Pin 5) | Reference interface | Provides internal +2.5 V reference (decouple with 0.1 µF to AGND) or accepts external reference for improved stability. |
| AGND (Pin 6) | Analog ground | Separate ground return 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); low = serial mode (RFS/SCLK/SDATA); determines physical data path routing. |
| DB11/LOW (Pin 8) | Data bit 11 / test pin | MSB in parallel mode; must be tied low in serial mode to ensure correct timing and output behavior. |
| DB10/LOW (Pin 9) | Data bit 10 / test pin | Second MSB in parallel mode; tied low in serial mode to prevent floating-state leakage and bus contention. |
| DB0 (Pin 20) | Data bit 0 (LSB) | LSB output in parallel mode; two's complement coding matches AD7892-1 family specification for signed data handling. |
| CONVST (Pin 24) | Conversion trigger | Rising-edge initiated conversion start; aperture delay <15 ns ensures precise sampling instant synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates dual-rail power design complexity and reduces BOM count in portable and embedded systems. |
| On-chip track/hold amplifier | Acquires full-scale sine wave inputs to 12-bit accuracy in ≤400 ns, enabling direct connection to wideband sensors without external buffering. |
| Dual analog input range | Supports ±10 V (industrial 4–20 mA loop interfaces) and ±5 V (legacy op-amp output stages) without hardware modification. |
| Flexible serial/parallel interface | MODE-pin-selectable I/O reduces PCB footprint vs. discrete interface ICs and simplifies firmware adaptation across microcontroller families. |
| Overvoltage protection | Withstands ±17 V on analog inputs-meets IEC 61000-4-5 surge immunity requirements without external TVS diodes. |
Applications
| Industrial Data Acquisition | Test & Measurement Equipment |
|---|---|
Use Scenario: High-channel-count PLC analog input modules acquiring voltage outputs from pressure, temperature, and flow sensors. IC Role / Device Role / Timing Role: Primary ADC converting conditioned sensor signals into digital data for FPGA or ARM-based controller processing. Use Value: ±1 LSB relative accuracy and ±17 V overvoltage tolerance ensure long-term calibration stability and field-reliability in electrically noisy factory environments. | Use Scenario: Benchtop multimeters and automated test equipment requiring fast, repeatable DC voltage measurements. IC Role / Device Role / Timing Role: Precision digitizer capturing steady-state or slowly varying signals with minimal system-level gain/offset drift. Use Value: Internal +2.5 V reference (±10 mV @ 25°C) and low 60 mW power enable compact, fanless instrument designs with consistent metrology-grade performance. |
| Motor Control Feedback | Medical Instrumentation |
Use Scenario: Real-time current sensing in servo drives using shunt resistors with differential amplification. IC Role / Device Role / Timing Role: High-speed ADC sampling motor phase currents at ≥500 kSPS for closed-loop field-oriented control algorithms. Use Value: 500 kSPS throughput and 400 ns track/hold acquisition allow accurate reconstruction of PWM-modulated current waveforms without aliasing artifacts. | Use Scenario: Portable ECG and patient monitoring devices digitizing low-amplitude biopotential signals. IC Role / Device Role / Timing Role: Front-end ADC providing 12-bit resolution and low-noise conversion for analog front-end amplifiers. Use Value: Single +5 V supply and 60 mW typical power consumption extend battery life while maintaining clinical-grade signal fidelity per IEC 60601-2-27. |
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 input range, but plastic DIP (N-24) package; identical electrical specs including ±1 LSB relative accuracy and 500 kSPS rate. | Preferred where through-hole assembly or legacy board rework is required; lacks SOIC thermal performance (θJA = 105°C/W vs. 75°C/W). | Select AD7892BN-1 only for manual soldering or DIP socket compatibility; AD7892BRZ-1 offers superior thermal management for surface-mount production. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, +2.7 V to +5.25 V supply; no internal reference; requires external +2.5 V reference and level-shifting for 5 V systems. | Suitable for ultra-low-power battery-operated devices (<1 mW active), but lacks overvoltage protection and dual-range input flexibility. | Choose ADS7822U for energy-constrained IoT edge nodes; AD7892BRZ-1 remains optimal for industrial-grade robustness and mixed-signal interface flexibility. |
Compared with AD7892BN-1, AD7892BRZ-1 delivers better thermal performance and modern SMT manufacturability; versus ADS7822U, it provides integrated reference, overvoltage protection, and dual-range analog input-making it more suitable for ruggedized, high-fidelity data acquisition where layout space and reliability outweigh minimal power savings.
Availability
AD7892BRZ-1 is available at Aetrix Electronics and suitable for industrial data acquisition, test equipment, motor control feedback, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AD7892BRZ-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 AD7892 product line delivers high-speed, low-power 12-bit SAR ADCs with integrated references and flexible interfaces-designed specifically for precision industrial, instrumentation, and embedded control applications demanding robustness and long-term availability.
FAQ
What input voltage ranges does the AD7892BRZ-1 support?
The AD7892BRZ-1 supports two selectable analog input ranges: ±10 V (when VIN2 is grounded) and ±5 V (when VIN2 is tied to VIN1). This dual-range capability is confirmed in the General Description and Ordering Guide sections of the official AD7892 datasheet Rev. C. The AD7892BRZ-1 is a member of the AD7892-1 variant family, which explicitly defines these ranges and excludes the 0 V to +2.5 V and ±2.5 V options used by other variants like AD7892-2 and AD7892-3.
Does the AD7892BRZ-1 include an internal voltage reference?
Yes, the AD7892BRZ-1 includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin. Per the datasheet, this reference has ±10 mV maximum error at +25°C, ±25 mV over full temperature range, and a typical temperature coefficient of 25 ppm/°C. It is buffered and intended for direct use-requiring only a 0.1 µF ceramic capacitor to AGND for decoupling. The AD7892BRZ-1 can also accept an external +2.5 V reference applied to the same pin.
What is the conversion time and maximum sampling rate of the AD7892BRZ-1?
The AD7892BRZ-1 has a maximum conversion time of 1.6 µs and a track/hold acquisition time of 400 ns, enabling a guaranteed throughput rate of 500 kSPS. These values are specified for the AD7892-1 variant in the Product Highlights, GENERAL DESCRIPTION, and TIMING CHARACTERISTICS tables of the datasheet Rev. C. The AD7892BRZ-1 does not support the 600 kSPS rate-that is exclusive to the AD7892-3 variant.
How is the interface mode selected on the AD7892BRZ-1?
The interface mode on the AD7892BRZ-1 is selected using the MODE pin (Pin 7): logic high enables the 12-bit parallel interface (DB0–DB11), while logic low enables the three-wire serial interface (RFS/SCLK/SDATA). This is documented in the PIN FUNCTION DESCRIPTION, CIRCUIT DESCRIPTION, and INTERFACING sections. In serial mode, DB11/LOW and DB10/LOW must be tied low; unused parallel data pins become high-impedance.
What package type is used for the AD7892BRZ-1?
The AD7892BRZ-1 uses a 24-lead SOIC package (package code R-24), as confirmed in the ORDERING GUIDE table and PIN CONFIGURATION diagram of the AD7892 datasheet Rev. C. The "R" in the part number suffix denotes SOIC; "Z" indicates tape-and-reel packaging. It is not available in DIP (N-24) or Cerdip (Q-24) variants under this specific ordering code.
AD7892BRZ-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:
- -
AD7892BRZ-1 FAQ
1.How can I place an order for AD7892BRZ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BRZ-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 AD7892BRZ-1 reliable?
The price and inventory of AD7892BRZ-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BRZ-1 is usually 5 days.
3.What payment methods are accepted for AD7892BRZ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BRZ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BRZ-1?
AD7892BRZ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BRZ-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 AD7892BRZ-1?
For technical support, including AD7892BRZ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BRZ-1 requirements.
6.How does Aetrix verify that AD7892BRZ-1 is sourced from the original manufacturer or authorized distributors?
All AD7892BRZ-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 AD7892BRZ-1 meets industry standards.
7.What is the process for return or replacement of AD7892BRZ-1?
All AD7892BRZ-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BRZ-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 AD7892BRZ-1 part is unused and in its original packaging.
Return procedure for AD7892BRZ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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