My Inquiry
My Account
Analog Devices Inc. AD7892BN-1
- Part No.:
- AD7892BN-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7892BN-1.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,504
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7892BN-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 rate, ±1 LSB relative accuracy, and dual serial/parallel interface - used in precision data acquisition systems for industrial process monitoring and sensor signal digitization.
For engineers reviewing the AD7892BN-1 datasheet, AD7892BN-1 pinout, AD7892BN-1 application, or AD7892BN-1 equivalent, this page delivers verified electrical specifications, validated interface timing, confirmed package mapping (N-24 DIP), and real-world use context for embedded instrumentation and test equipment design.
Technical Context
The AD7892BN-1 integrates an on-chip track/hold amplifier with 400 ns acquisition time, a buffered +2.5 V internal reference (±10 mV error at +25°C), and LC2MOS process-based 12-bit SAR core delivering 70 dB SNR at 100 kHz input. Its dual-mode interface (MODE-pin selectable) supports both 12-bit parallel bus access and three-wire serial (RFS/SCLK/SDATA) operation.
It operates from a single +5 V ±5% supply, consumes 18 mA typical (90 mW), and features overvoltage protection allowing ±17 V analog input tolerance without damage. The device uses two's complement output coding and requires no external clock for parallel mode, relying instead on CONVST-triggered conversion sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic transfer function with no missing codes over full temperature range. |
| Throughput Rate | 500 kSPS - enables real-time sampling of signals up to ~200 kHz Nyquist bandwidth in closed-loop control. |
| Analog Input Range | ±5 V or ±10 V - selectable via VIN2 connection; supports direct interfacing with industrial transducers and op-amp outputs. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity within 0.024% FSR, critical for calibration-sensitive measurement systems. |
| Supply Voltage | +5 V ±5% - eliminates need for dual supplies, simplifying power design in portable and isolated DAQ modules. |
| Power Dissipation | 90 mW max (60 mW typ) - enables thermal management in dense PCB layouts without forced air cooling. |
| Reference Output | +2.5 V ±10 mV @ +25°C - provides stable, low-drift reference for self-contained operation or external circuit biasing. |
Pinout & Package
AD7892BN-1 is housed in a 24-lead, 0.3" wide plastic DIP (package code N-24), compatible with standard through-hole assembly and socket-based prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +5 V ±5%; powers analog and digital sections - decoupling to AGND required near pin. |
| STANDBY (Pin 2) | Power-down control | Logic high = active mode; logic low = standby (75 µW typical), enabling rapid wake-up for burst-mode acquisition. |
| VIN2 (Pin 3) | Analog input configuration | Grounded for ±10 V range; tied to VIN1 for ±5 V range - determines scaling resistor network path. |
| VIN1 (Pin 4) | Main analog input | Receives signal to be digitized; input impedance 8 kΩ min - requires drive capability ≥1 mA for full accuracy. |
| REF OUT/REF IN (Pin 5) | Reference node | Provides +2.5 V internal reference or accepts external 2.375–2.625 V source; 5.5 kΩ output impedance. |
| AGND (Pin 6) | Analog ground reference | 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 active); low = serial mode (RFS/SCLK/SDATA functional). |
| DB11/LOW (Pin 8) | Data bit 11 / test pin | In parallel mode: MSB output; in serial mode: must be tied low - failure causes undefined behavior. |
| CONVST (Pin 24) | Conversion start trigger | Rising-edge sensitive; initiates track-to-hold transition and starts 1.6 µs conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for ±15 V rails common in legacy data acquisition, reducing BOM count and layout complexity. |
| On-chip track/hold amplifier | Acquires full-scale input to 12-bit accuracy in ≤400 ns - enables accurate sampling of fast transients without external THA. |
| Dual serial/parallel interface | MODE-pin configurable: parallel for microprocessor bus integration; three-wire serial for microcontroller GPIO-limited designs. |
| ±17 V analog input overvoltage tolerance | Protects against field-induced surges and wiring faults in industrial environments without external clamping diodes. |
| Internal +2.5 V reference | ±10 mV initial error and 25 ppm/°C TC - sufficient for 12-bit accuracy across –40°C to +85°C without external reference. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous voltage/current monitoring of PLC I/O modules and motor drive feedback loops. IC Role / Device Role / Timing Role: Primary ADC digitizing ±10 V sensor outputs at 500 kSPS with deterministic CONVST-to-EOC latency (≤1.6 µs). Use Value: Enables real-time fault detection with <1 µs aperture uncertainty and guaranteed monotonicity across temperature. |
Use Scenario: High-speed parametric testing of analog components using programmable stimulus-response capture. IC Role / Device Role / Timing Role: Precision digitizer synchronized to pattern generator clocks via CONVST edge; EOC triggers data capture handshake. Use Value: Delivers 70 dB SNR at 100 kHz input, meeting Class I ATE accuracy requirements without post-calibration. |
| Portable Data Loggers | Medical Instrumentation Front-End |
Use Scenario: Battery-powered environmental sensor nodes recording thermocouple, strain gauge, and pressure transducer outputs. IC Role / Device Role / Timing Role: Low-power ADC operating in burst mode: STANDBY-controlled sleep between 10-ms sample intervals. Use Value: 75 µW standby power extends AA battery life to >1 year while maintaining ±1 LSB linearity during wake-up conversions. |
Use Scenario: Digitizing conditioned bio-potential signals (ECG, EEG) with high common-mode rejection and low noise floor. IC Role / Device Role / Timing Role: Final-stage ADC after instrumentation amplifier; accepts ±5 V differential inputs with bipolar zero error ≤±2 LSB. Use Value: Two's complement output simplifies signed arithmetic in DSP firmware; 78 dB THD prevents harmonic contamination of diagnostic waveforms. |
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 |
|---|---|---|---|
| AD7892AR-1 | Same specs but SOIC-24 package (R-24); 70°C/W θJA vs. 105°C/W for N-24 DIP. | Better thermal performance in surface-mount assemblies; no through-hole footprint compatibility. | Select when board space is constrained and reflow soldering is used. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, +2.7–5.25 V supply; no internal reference or overvoltage protection. | Lacks ±17 V input tolerance and dual-interface flexibility; requires external reference and level-shifting for +5 V systems. | Select only for cost-sensitive, low-speed, SPI-native designs where robustness is secondary. |
Compared with AD7892AR-1, AD7892BN-1 offers identical electrical performance but higher thermal resistance due to DIP packaging - suitable for prototyping and low-volume industrial controls. Compared with ADS7822U, AD7892BN-1 provides superior input ruggedness, flexible interface options, and guaranteed ±1 LSB linearity, justifying its use in mission-critical measurement systems.
Availability
AD7892BN-1 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, and portable data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7892BN-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7892BN-1 belongs to Analog Devices' precision data acquisition IC family, designed specifically for high-speed, single-supply, industrial-grade analog-to-digital conversion in harsh electromagnetic and thermal environments.
FAQ
What is the maximum analog input voltage the AD7892BN-1 can tolerate without damage?
The AD7892BN-1 supports ±17 V absolute maximum analog input voltage on VIN1 when VIN2 is grounded - a key overvoltage protection feature enabling direct connection to industrial field wiring without external clamping. This rating applies only to the AD7892-1 variant (including AD7892BN-1) and is specified under Absolute Maximum Ratings. Operation beyond ±10 V input range is not guaranteed for accuracy, but the port remains undamaged.
Does the AD7892BN-1 require an external clock for parallel interface operation?
No, the AD7892BN-1 does not require an external clock for parallel interface operation. Conversion is initiated solely by the rising edge of the CONVST signal, and timing is internally generated. The EOC output indicates completion, and RD/CS strobes control data readout. External clocks are needed only in serial mode (SCLK) or for system-level synchronization - not for basic parallel bus functionality.
How does the MODE pin affect the functionality of pins DB11/LOW and DB10/LOW on the AD7892BN-1?
When MODE = high (parallel mode), DB11/LOW and DB10/LOW function as TTL-compatible data outputs (DB11 = MSB, DB10). When MODE = low (serial mode), these pins become test inputs that must be hard-wired to logic low; leaving them floating or high causes undefined behavior and potential conversion failure. This dual-role assignment is explicitly defined in the Pin Function Description table for AD7892BN-1.
What is the significance of the ±1 LSB relative accuracy specification for the AD7892BN-1?
The ±1 LSB relative accuracy (endpoint nonlinearity) means the AD7892BN-1's transfer function deviates no more than ±1 least-significant bit from a straight line drawn between its actual zero-scale and full-scale transition points - guaranteeing monotonicity and predictable gain/offset behavior across –40°C to +85°C. This enables calibration-free operation in applications like sensor linearization where code-to-code consistency is essential.
Can the AD7892BN-1 operate with an external reference, and what are the interface requirements?
Yes, the AD7892BN-1 can operate with an external reference applied to the REF OUT/REF IN pin (Pin 5). The external source must provide 2.375 V to 2.625 V, sink/source ±100 µA, and exhibit ≤10 pF capacitance. Common choices include AD780 or REF43. Using an external reference overdrives the internal +2.5 V source and becomes the sole reference for the ADC core and track/hold - improving system-level accuracy when tighter reference stability is required.
AD7892BN-1 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:
- 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:
- -
AD7892BN-1 FAQ
1.How can I place an order for AD7892BN-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BN-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 AD7892BN-1 reliable?
The price and inventory of AD7892BN-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BN-1 is usually 5 days.
3.What payment methods are accepted for AD7892BN-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BN-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BN-1?
AD7892BN-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BN-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 AD7892BN-1?
For technical support, including AD7892BN-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BN-1 requirements.
6.How does Aetrix verify that AD7892BN-1 is sourced from the original manufacturer or authorized distributors?
All AD7892BN-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 AD7892BN-1 meets industry standards.
7.What is the process for return or replacement of AD7892BN-1?
All AD7892BN-1 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BN-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 AD7892BN-1 part is unused and in its original packaging.
Return procedure for AD7892BN-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7892BN-1 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
