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Analog Devices Inc. AD7892BNZ-1
- Part No.:
- AD7892BNZ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7892BNZ-1.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,942
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Product details
Overview
AD7892BNZ-1 from Analog Devices is a 12-bit, single-supply successive approximation ADC with ±5 V or ±10 V analog input range, 500 kSPS throughput, 1.6 µs conversion time, and integrated track/hold amplifier - used in industrial data acquisition systems requiring high DC accuracy and overvoltage-tolerant signal conditioning.
For engineers reviewing the AD7892BNZ-1 datasheet, AD7892BNZ-1 pinout, AD7892BNZ-1 application, or AD7892BNZ-1 equivalent, this page delivers verified electrical specs, interface timing constraints, real-world use cases, and validated alternative parts for precision analog-to-digital conversion in embedded instrumentation.
Technical Context
The AD7892BNZ-1 implements a 12-bit SAR architecture with on-chip track/hold, internal +2.5 V reference (±10 mV @ +25°C), and dual-mode interface logic. It uses LC2MOS process to integrate bipolar precision circuitry with CMOS control logic.
Its analog front-end supports ±10 V or ±5 V input ranges via VIN1/VIN2 configuration, with ±17 V overvoltage tolerance on VIN1 when VIN2 is grounded. The device operates exclusively from a single +5 V ±5% supply and enters low-power standby mode (<100 µA) via STANDBY pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic output and no missing codes across full temperature range. |
| Throughput Rate | 500 kSPS - enables real-time sampling of signals up to ~200 kHz Nyquist bandwidth. |
| Conversion Time | 1.6 µs max - defines minimum inter-conversion interval; limits maximum sampling rate. |
| Analog Input Range | ±10 V or ±5 V - selectable via VIN2 connection; supports direct interfacing to industrial sensor outputs. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity error stays within 1 least-significant bit over temperature. |
| Power Dissipation | 60 mW typ at +5 V - enables battery-powered or thermally constrained portable instrumentation designs. |
| Overvoltage Tolerance | ±17 V on VIN1 - protects against transient surges without external clamping diodes. |
Pinout & Package
AD7892BNZ-1 is housed in a 24-lead, 0.3" wide plastic DIP (N-24 package) with through-hole mounting and standard 0.1" pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive Supply | +5 V ±5% 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 power draw). |
| VIN2 (Pin 3) | Analog Input Reference | Grounded for ±10 V range; tied to VIN1 for ±5 V range; must be AGND for AD7892BNZ-1 operation. |
| VIN1 (Pin 4) | Main Analog Input | Accepts ±10 V or ±5 V differential input; ±17 V fault-tolerant; connects to sensor or signal conditioner output. |
| REF OUT/REF IN (Pin 5) | Reference Interface | Provides internal +2.5 V reference (±10 mV @ +25°C); accepts external 2.375–2.625 V reference. |
| AGND (Pin 6) | Analog Ground | Separate ground return for analog circuitry; must be star-connected to minimize noise coupling. |
| MODE (Pin 7) | Interface Selection | Logic high = parallel 12-bit output; logic low = serial three-wire (RFS/SCLK/SDATA) interface. |
| DB11/LOW (Pin 8) | Data Bit 11 / Test | MSB in parallel mode; must be tied low in serial mode to ensure 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 bipolar input ranges. |
| RD (Pin 21) | Read Strobe | Active-low control enabling data bus output; requires 200 ns setup before next CONVST edge. |
| CS (Pin 22) | Chip Select | Active-low enable for parallel data access; used with RD to gate DB0–DB11 outputs. |
| EOC (Pin 23) | End-of-Conversion Flag | Active-low pulse (~100 ns width) signaling valid data ready; usable as microprocessor interrupt source. |
| CONVST (Pin 24) | Convert Start | Rising-edge triggered; initiates track-to-hold transition and starts conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual ±15 V rails common in legacy data acquisition systems. |
| Integrated track/hold amplifier | Acquires full-scale sine wave inputs to 12-bit accuracy in ≤400 ns; supports >300 kHz input bandwidth. |
| Dual parallel/serial interface | Reduces BOM count by eliminating external interface logic; MODE pin selects between 12-bit bus or 3-wire SPI-compatible protocol. |
| ±17 V analog input overvoltage protection | Prevents latch-up or damage during field wiring errors or ESD events without external protection components. |
| On-chip +2.5 V reference | ±10 mV initial error and 25 ppm/°C drift enable calibrated measurements without external reference ICs. |
Applications
| Industrial Process Monitoring | Portable Data Logger |
|---|---|
Use Scenario: Continuous monitoring of 4–20 mA current loops and ±10 V transducer outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC converting conditioned analog sensor signals into digital values for real-time control algorithms. Use Value: ±1 LSB relative accuracy and ±17 V input tolerance reduce calibration frequency and field failure rates in harsh factory environments. | Use Scenario: Battery-powered environmental sensor node measuring temperature, pressure, and humidity over extended deployments. IC Role / Device Role / Timing Role: Low-power ADC acquiring synchronized multi-channel readings at 500 kSPS with minimal sleep/wake latency. Use Value: 75 µW standby power and single +5 V operation extend battery life beyond 12 months while maintaining 12-bit resolution. |
| Test & Measurement Equipment | Motor Drive Current Sensing |
Use Scenario: Digitizing analog waveforms in benchtop oscilloscopes and automated test equipment with >70 dB SNR. IC Role / Device Role / Timing Role: High-fidelity front-end ADC capturing fast transients and harmonic content with minimal distortion. Use Value: –78 dB THD and 70 dB SINAD support accurate spectral analysis of switching power supply noise and motor harmonics. | Use Scenario: Isolated phase-current measurement in servo drives using shunt resistors and op-amp signal conditioning. IC Role / Device Role / Timing Role: Precision ADC digitizing amplified shunt voltage with bipolar ±5 V input range and fast acquisition. Use Value: 400 ns track/hold acquisition time enables accurate sampling of high-frequency PWM ripple without aliasing. |
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 |
|---|---|---|---|
| AD7892AR-1 | Same core specs but SOIC-24 package (R-24); no internal trim for relative accuracy. | Suitable for surface-mount PCBs where space and reflow compatibility are prioritized over ±1 LSB guarantee. | Select AD7892AR-1 when board area is constrained and ±1 LSB accuracy is not required for final system calibration. |
| ADS8320U | 16-bit, 100 kSPS, SPI-only interface; no parallel mode; higher resolution but lower speed and no overvoltage protection. | Better for high-precision, low-speed applications like weigh scales; unsuitable for ±17 V field inputs or microprocessor bus interfacing. | Choose ADS8320U only if resolution >12 bits is mandatory and input protection/speed/interface flexibility are secondary. |
Compared with AD7892AR-1, AD7892BNZ-1 provides guaranteed ±1 LSB relative accuracy in through-hole DIP packaging, while ADS8320U trades speed, robustness, and interface versatility for higher resolution - making AD7892BNZ-1 optimal for industrial DAQ where reliability and design reuse matter most.
Availability
AD7892BNZ-1 is available at Aetrix Electronics and suitable for industrial process monitoring, portable data loggers, test & measurement equipment, and motor drive current sensing requiring stable component supply and long-term obsolescence management.
Supply support for AD7892BNZ-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 was designed for high-speed, low-power, single-supply data acquisition in industrial and instrumentation applications where DC accuracy, input ruggedness, and flexible microprocessor interfacing are critical.
FAQ
What is the maximum analog input voltage the AD7892BNZ-1 can tolerate without damage?
The AD7892BNZ-1 supports ±17 V on VIN1 when VIN2 is grounded - exceeding its ±10 V operating range. This overvoltage tolerance prevents permanent damage during field wiring faults or transient surges, eliminating need for external protection diodes in many industrial installations. The specification is confirmed in Absolute Maximum Ratings and General Description sections of the official AD7892 datasheet Rev. C.
Does the AD7892BNZ-1 require an external reference voltage?
No, the AD7892BNZ-1 includes an internal +2.5 V reference with ±10 mV error at +25°C and 25 ppm/°C temperature coefficient. REF OUT/REF IN (Pin 5) provides access to this reference, which must be decoupled with a 0.1 µF ceramic capacitor to AGND. An external reference may be used for tighter accuracy, but it is not required for basic operation of the AD7892BNZ-1.
How does the MODE pin affect the interface behavior of the AD7892BNZ-1?
The MODE pin (Pin 7) selects between parallel and serial operation: logic high enables 12-bit parallel output on DB0–DB11, while logic low activates the three-wire serial interface (RFS/SCLK/SDATA). In serial mode, DB11/LOW and DB10/LOW (Pins 8 and 9) must be tied low, and DB0–DB11 become high-impedance. This dual-interface capability allows the AD7892BNZ-1 to interface directly with both microprocessors and microcontrollers without glue logic.
What is the guaranteed DC accuracy specification for the AD7892BNZ-1?
The AD7892BNZ-1 guarantees ±1 LSB relative accuracy (endpoint nonlinearity) over its full operating temperature range of –40°C to +85°C. This is explicitly stated in the Ordering Guide and Specifications table for "B Versions" under Relative Accuracy. It also specifies ±1 LSB differential nonlinearity and ±4 LSB full-scale error, ensuring monotonicity and predictable gain/offset behavior in closed-loop control systems using the AD7892BNZ-1.
Can the AD7892BNZ-1 operate from a supply voltage other than +5 V?
No - the AD7892BNZ-1 is specified only for +5 V ±5% operation. Absolute Maximum Ratings limit VDD to –0.3 V to +7 V, but all electrical performance (conversion time, accuracy, power, interface timing) is guaranteed solely at +5 V ±5%. Operation outside this range invalidates specifications and risks functional failure. The AD7892BNZ-1 does not support 3.3 V or other supply voltages, unlike some newer SAR ADCs.
AD7892BNZ-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7892BNZ-1 FAQ
1.How can I place an order for AD7892BNZ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BNZ-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 AD7892BNZ-1 reliable?
The price and inventory of AD7892BNZ-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BNZ-1 is usually 5 days.
3.What payment methods are accepted for AD7892BNZ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BNZ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BNZ-1?
AD7892BNZ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BNZ-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 AD7892BNZ-1?
For technical support, including AD7892BNZ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BNZ-1 requirements.
6.How does Aetrix verify that AD7892BNZ-1 is sourced from the original manufacturer or authorized distributors?
All AD7892BNZ-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 AD7892BNZ-1 meets industry standards.
7.What is the process for return or replacement of AD7892BNZ-1?
All AD7892BNZ-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BNZ-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 AD7892BNZ-1 part is unused and in its original packaging.
Return procedure for AD7892BNZ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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