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Analog Devices Inc. AD7892BN-2
- Part No.:
- AD7892BN-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7892BN-2.pdf
- Description:
- IC ADC 12BIT LP 500KSPS 24-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
AD7892BN-2 from Analog Devices is a 12-bit, single-supply successive approximation ADC with 500 kSPS throughput, 0 V to +2.5 V unipolar input range, ±1 LSB relative accuracy, and integrated track/hold amplifier - used in precision data acquisition systems for industrial sensor interfacing and portable instrumentation.
For engineers reviewing the AD7892BN-2 datasheet, AD7892BN-2 pinout, AD7892BN-2 application, or AD7892BN-2 equivalent, this page delivers verified technical context, interface timing constraints, unipolar offset error (±4 LSB max), standby current (250 µA typ), and SOIC/DIP package compatibility - critical for low-power embedded analog front-end design.
Technical Context
The AD7892BN-2 implements a 1.6 µs conversion time with 400 ns track/hold acquisition, enabling precise sampling of DC-coupled sensor signals up to 200 kHz bandwidth. Its on-chip +2.5 V reference (±10 mV @ 25°C) supports direct use without external components when decoupled with 0.1 µF to AGND.
It features dual-mode interface control via MODE pin: parallel 12-bit output (DB0–DB11) with CS/RD/EOC handshaking, or three-wire serial (RFS/SCLK/SDATA) supporting straight binary coding - both compliant with TTL logic levels and 5 V supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes over full operating temperature range. |
| Sampling Rate | 500 kSPS - defines maximum sustained conversion rate for continuous acquisition. |
| Analog Input Range | 0 V to +2.5 V on VIN1 (with VIN2 grounded) - enables direct connection to rail-to-rail output sensors or DACs. |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and ≤0.024% full-scale linearity error in closed-loop calibration. |
| Unipolar Offset Error | ±4 LSB max - specifies worst-case deviation at first code transition (00...000 → 00...001). |
| Power Consumption | 60 mW typical at 5 V - supports battery-powered portable instruments with <2 ms wake-up latency from standby. |
| Standby Current | 250 µA typical - reduces system power by >99% during idle periods without losing configuration state. |
Pinout & Package
AD7892BN-2 is available in 24-lead plastic DIP (N-24) and SOIC (R-24) packages. Pin functions are identical across variants; DIP uses through-hole mounting while SOIC supports surface-mount assembly with 0.3" body width and standard 0.025" pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Analog Input 1 | Primary unipolar input node accepting 0 V to +2.5 V signals referenced to VIN2 (AGND); high-impedance FET input (10 nA max bias). |
| VIN2 | Analog Input 2 | Ground reference for VIN1 in AD7892BN-2 mode; must be tied to AGND - not connected to external voltage sources. |
| REF OUT/REF IN | Reference I/O | Provides internal +2.5 V reference (±10 mV @ 25°C) or accepts external 2.375–2.625 V source; requires 0.1 µF ceramic decoupling to AGND. |
| MODE | Interface Select | Logic high enables parallel DB0–DB11 output; logic low configures RFS/SCLK/SDATA serial interface. |
| CONVST | Convert Start | Rising-edge-triggered command initiating track→hold transition and ADC conversion sequence. |
| EOC | End-of-Conversion | Active-low pulse (100 ns nominal width) signaling valid data ready in output register. |
| CS / RD | Chip Select / Read | Active-low enable pair controlling three-state output drivers; RD falling edge latches parallel data onto bus. |
| STANDBY | Power-Down Control | Logic low places device in low-current standby (250 µA typ); conversion must not start within 30 µs of exit. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V Supply Operation | Eliminates need for dual ±15 V rails or charge pumps - simplifies PCB layout and reduces BOM count in portable systems. |
| Integrated Track/Hold Amplifier | Acquires 0–2.5 V step inputs to 12-bit accuracy in ≤400 ns - enables accurate sampling of fast transients without external circuitry. |
| Flexible Dual Interface | Parallel (12-bit) and serial (3-wire) modes selectable via MODE pin - supports both microcontroller GPIO-limited designs and high-speed DSP interfaces. |
| On-Chip +2.5 V Reference | ±10 mV initial error and 25 ppm/°C drift - provides stable scaling for unipolar measurements without external reference ICs or trimming. |
| Low Standby Power | 250 µA typical current draw - extends battery life in intermittent-sampling applications such as environmental monitoring nodes. |
Applications
| Industrial Sensor Signal Conditioning | Portable Medical Instrumentation |
|---|---|
Use Scenario: Digitizing outputs from 4–20 mA loop-powered pressure transmitters with 0–2.5 V output scaling after I/V conversion. IC Role / Device Role / Timing Role: ADC front-end capturing calibrated analog sensor data at 100–500 kSPS with minimal external support components. Use Value: Eliminates external op-amp buffers and reference ICs due to integrated track/hold and 2.5 V reference - reducing board area by ≥30%. |
Use Scenario: Sampling ECG electrode signals conditioned by instrumentation amplifiers with rail-to-rail 0–2.5 V output swing. IC Role / Device Role / Timing Role: Precision unipolar digitizer synchronized to low-jitter system clock via CONVST edge triggering. Use Value: Achieves 70 dB SNR at 100 kHz input frequency - sufficient for diagnostic-grade waveform fidelity without oversampling. |
| Automated Test Equipment (ATE) Channel Modules | Energy Metering Front-Ends |
Use Scenario: High-throughput acquisition of multiple sensor channels using shared parallel bus with CS/RD arbitration. IC Role / Device Role / Timing Role: Fast-conversion ADC with 35 ns t6 access time enabling tight CPU read cycles in multi-channel scan architectures. Use Value: Supports 500 kSPS per channel with <1 µs inter-channel skew - meets Class 0.2 metering timing requirements. |
Use Scenario: Digitizing isolated voltage/current sense signals scaled to 0–2.5 V by precision resistive dividers in smart electricity meters. IC Role / Device Role / Timing Role: Low-drift ADC providing stable gain reference for metrology calculations over –40°C to +85°C ambient. Use Value: ±1 LSB relative accuracy ensures <0.025% full-scale error contribution - meeting IEC 62053-21 Class B accuracy targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit unipolar ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BR-2 | Same specs but in 24-lead SOIC (R-24) package - 75°C/W θJA vs. 105°C/W for N-24 DIP. | Better thermal performance in dense layouts; requires rework for through-hole prototyping. | Select BR-2 for volume SMT production where thermal margin and board space are constrained. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, 2.7–5.25 V supply - no parallel mode or internal reference. | Lacks MODE-selectable interface and on-chip 2.5 V reference; requires external REF and level-shifting for 5 V systems. | Choose ADS7822U only if serial-only interface suffices and system already provides precision 2.5 V reference. |
Compared with AD7892BR-2, AD7892BN-2 offers identical electrical performance in a through-hole DIP package ideal for lab validation and low-volume assembly; versus ADS7822U, it delivers higher throughput, dual-interface flexibility, and self-contained reference - reducing design complexity in 5 V industrial systems.
Availability
AD7892BN-2 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable medical instrumentation, automated test equipment channel modules, and energy metering front-ends requiring stable component supply with long-term lifecycle assurance.
Supply support for AD7892BN-2 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, founded in 1965 and headquartered in Wilmington, MA.
The AD7892 series belongs to Analog Devices' precision data acquisition product line, designed specifically for high-speed, low-power, single-supply 12-bit ADC applications in industrial, medical, and test equipment where integration, accuracy, and interface flexibility are critical.
FAQ
What is the input voltage range supported by the AD7892BN-2?
The AD7892BN-2 supports a unipolar analog input range of 0 V to +2.5 V on VIN1, with VIN2 tied to AGND. This is fixed for the -2 variant and differs from the ±5 V or ±10 V ranges of AD7892BN-1 or the ±2.5 V range of AD7892BN-3. The input resistance is 8 kΩ minimum, and input current is limited to ±10 nA maximum.
Does the AD7892BN-2 require an external reference voltage?
No - the AD7892BN-2 includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin. When used internally, it requires only a 0.1 µF ceramic capacitor from that pin to AGND. External references (2.375–2.625 V) may be applied to override the internal source, but are not required for basic operation of the AD7892BN-2.
How does the MODE pin affect interface behavior in the AD7892BN-2?
The MODE pin selects between parallel and serial operation: logic high enables 12-bit parallel output on DB0–DB11 with CS/RD/EOC handshaking; logic low configures RFS/SCLK/SDATA three-wire serial interface. The AD7892BN-2 outputs straight binary coding in both modes, unlike the two's complement format used by AD7892BN-1 and AD7892BN-3.
What is the guaranteed accuracy specification for the AD7892BN-2?
The AD7892BN-2 guarantees ±1 LSB relative accuracy (endpoint nonlinearity) and ±4 LSB unipolar offset error over its full operating temperature range (–40°C to +85°C). These values are specified in the B-grade ordering option and confirmed in the AD7892BN-2 datasheet revision C, Table "DC ACCURACY".
Can the AD7892BN-2 operate from a supply voltage other than +5 V?
No - the AD7892BN-2 is specified for operation only at +5 V ±5%. Absolute maximum ratings limit VDD to –0.3 V to +7 V, but electrical performance (conversion time, accuracy, power) is guaranteed solely at +5 V nominal. Deviations outside ±5% invalidate all published specifications for the AD7892BN-2.
AD7892BN-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7892BN-2 FAQ
1.How can I place an order for AD7892BN-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BN-2 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 AD7892BN-2 reliable?
The price and inventory of AD7892BN-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BN-2 is usually 5 days.
3.What payment methods are accepted for AD7892BN-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BN-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BN-2?
AD7892BN-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BN-2 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 AD7892BN-2?
For technical support, including AD7892BN-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BN-2 requirements.
6.How does Aetrix verify that AD7892BN-2 is sourced from the original manufacturer or authorized distributors?
All AD7892BN-2 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 AD7892BN-2 meets industry standards.
7.What is the process for return or replacement of AD7892BN-2?
All AD7892BN-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BN-2, 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 AD7892BN-2 part is unused and in its original packaging.
Return procedure for AD7892BN-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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