My Inquiry
My Account
Analog Devices Inc. AD7892AN-2
- Part No.:
- AD7892AN-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7892AN-2.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,061
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7892AN-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, on-chip track/hold amplifier, and dual serial/parallel interface - used in portable data acquisition systems requiring low-power, high-accuracy analog-to-digital conversion.
For engineers reviewing the AD7892AN-2 datasheet, AD7892AN-2 pinout, AD7892AN-2 application, or AD7892AN-2 equivalent, this page delivers verified specifications, interface timing constraints, unipolar offset error (±4 LSB max), standby current (250 µA typ), and real-world use context for embedded sensor signal conditioning and industrial control loop digitization.
Technical Context
The AD7892AN-2 implements a 1.6 µs conversion time with 400 ns track/hold acquisition time, enabling precise sampling of DC-coupled sensor outputs up to 200 kHz bandwidth. Its LC2MOS process integrates bipolar precision circuitry with CMOS logic to achieve ±4 LSB positive full-scale error and ±4 LSB unipolar offset error over –40°C to +85°C.
It features a dedicated REF OUT/REF IN pin supporting internal +2.5 V reference (±10 mV @ 25°C) or external reference overdrive, and MODE-selectable parallel (12-bit TTL-compatible DB0–DB11) or three-wire serial (RFS/SCLK/SDATA) interface - both fully specified for timing compliance at 5 V ±5% supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes; supports 4096 discrete output levels for high-fidelity sensor digitization. |
| Input Range | 0 V to +2.5 V on VIN1 - optimized for unipolar transducer outputs (e.g., pressure sensors, RTD bridges) without external level-shifting. |
| Throughput Rate | 500 kSPS - enables real-time monitoring of fast-changing industrial process signals with ≤2 µs cycle time. |
| Unipolar Offset Error | ±4 LSB max - limits zero-point calibration drift to ±1 mV at 2.5 V reference, critical for precision instrumentation. |
| Power Consumption | 60 mW typical at 5 V - allows battery-powered operation for >10 hours with 600 mAh Li-ion cell in continuous sampling mode. |
| Standby Current | 250 µA typical - reduces average power by >99% during idle intervals in duty-cycled measurement systems. |
| Reference Output | +2.5 V ±10 mV @ 25°C - provides stable, buffered reference for external circuitry or cascaded ADC stages. |
Pinout & Package
AD7892AN-2 is housed in a 24-lead, 0.3" wide plastic DIP (N-24 package), compatible with through-hole PCB assembly and socket-based prototyping. Pin numbering follows standard dual-in-line orientation with Pin 1 at top-left corner (notch side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Analog Input 1 | Primary unipolar input node; accepts 0 V to +2.5 V relative to VIN2 (AGND); requires <50 nA input bias for high-impedance sources. |
| VIN2 | Analog Input 2 | Must be tied to AGND for AD7892AN-2; floating or externally biased connection invalidates input range specification. |
| REF OUT/REF IN | Reference I/O | Provides internal +2.5 V reference (decoupled via 0.1 µF ceramic to AGND) or accepts external 2.375–2.625 V source. |
| MODE | Interface Select | Logic high = parallel mode (DB0–DB11 active); logic low = serial mode (RFS/SCLK/SDATA active). |
| CONVST | Convert Start | Rising-edge-triggered command initiates track→hold transition and starts 1.6 µs conversion sequence. |
| EOC | End-of-Conversion | Active-low pulse (100 ns nominal width) signals valid data ready; used for interrupt-driven microcontroller readback. |
| RD & CS | Parallel Read Control | Both low enable three-state DB0–DB11 outputs; RD falling edge must precede next CONVST rising edge by ≥200 ns. |
| DB0–DB11 | Data Bus | 12-bit straight binary outputs (LSB= DB0, MSB= DB11); high-impedance when RD/CS not asserted. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual-rail or negative supplies in portable instrumentation, reducing BOM count and layout complexity. |
| On-chip track/hold amplifier | Acquires 0–2.5 V step inputs to 12-bit accuracy within 400 ns, enabling accurate sampling of fast transient sensor events. |
| Dual serial/parallel interface | MODE-pin selection allows reuse across microcontroller platforms: parallel for FPGA/DSP bus interfacing, serial for low-pin-count MCUs. |
| Internal +2.5 V reference | ±10 mV initial error and 25 ppm/°C TC enable <0.1% gain stability over temperature without external reference ICs. |
| Low-power standby mode | 250 µA typical quiescent current extends battery life in wireless sensor nodes while retaining full configuration state. |
Applications
| Industrial Process Monitoring | Portable Data Loggers |
|---|---|
Use Scenario: Continuous digitization of 4–20 mA loop outputs converted to voltage via precision shunt resistor in PLC analog input modules. IC Role / Device Role / Timing Role: ADC front-end capturing calibrated sensor values at 500 kSPS with 12-bit resolution and minimal offset drift. Use Value: Enables sub-0.1% system accuracy over –40°C to +85°C using only internal reference and no external trimming components. |
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and CO₂ with periodic wake-up sampling. IC Role / Device Role / Timing Role: Low-power A/D converter entering 250 µA standby between 100 ms sampling intervals to maximize runtime. Use Value: Achieves >1 year field deployment on two AA alkaline cells by combining 60 mW active power and ultra-low standby current. |
| Medical Instrumentation | Test & Measurement Equipment |
Use Scenario: Digitizing ECG electrode signals amplified to 0–2.5 V range in handheld patient monitors. IC Role / Device Role / Timing Role: Precision unipolar ADC rejecting common-mode noise via differential input configuration (VIN1–VIN2). Use Value: Delivers 70 dB SNR at 100 kHz input frequency, meeting IEC 60601-2-27 requirements for diagnostic-grade waveform fidelity. |
Use Scenario: Embedded digitizer in benchtop multimeter capturing AC/DC voltage and current waveforms at 500 kSPS. IC Role / Device Role / Timing Role: High-speed ADC with parallel interface synchronized to FPGA controller for real-time histogram analysis. Use Value: Supports 12-bit histogram binning with <1 LSB integral nonlinearity, enabling ±0.025% basic accuracy in RMS calculations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, unipolar-input ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BN-2 | ±1 LSB relative accuracy (vs. ±1.5 LSB for AD7892AN-2); same package, speed, and input range. | Required where tighter linearity is needed for calibration-critical medical devices. | Select AD7892BN-2 when system-level testing shows AD7892AN-2's ±1.5 LSB error exceeds allowable budget. |
| ADS7822U | 2.7–5.25 V supply range; SPI-only interface; 200 kSPS max; 0–VREF input (VREF = 2.5 V); SO-8 package. | Suitable for space-constrained, lower-throughput designs where serial interface suffices and DIP footprint is unacceptable. | Choose ADS7822U only if board area is constrained and 200 kSPS meets sampling requirement - not a drop-in replacement. |
Compared with AD7892BN-2, AD7892AN-2 trades 0.5 LSB linearity for lower cost and broader availability; versus ADS7822U, it offers 2.5× higher throughput and DIP packaging but lacks supply voltage flexibility and uses a larger footprint.
Availability
AD7892AN-2 is available at Aetrix Electronics and suitable for industrial process monitoring, portable data loggers, medical instrumentation, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7892AN-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 product line delivers high-speed, low-power, single-supply 12-bit ADCs for embedded data acquisition where precision, compact size, and interface flexibility are essential - targeting portable instrumentation, industrial control, and medical diagnostics.
FAQ
What is the maximum analog input voltage for AD7892AN-2?
The AD7892AN-2 accepts a unipolar input range of 0 V to +2.5 V on VIN1, referenced to VIN2 (which must be tied to AGND). Exceeding +2.5 V risks damage or invalid conversion results; the absolute maximum rating for VIN1 is VDD (+5 V), but operation beyond +2.5 V violates specification and may cause clipping or nonmonotonic behavior. Always limit input signals using external clamping or scaling networks.
Does AD7892AN-2 require an external reference voltage?
No - AD7892AN-2 includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin, specified with ±10 mV error at +25°C and ±25 mV over –40°C to +85°C. For applications demanding tighter reference accuracy, an external 2.375–2.625 V source (e.g., AD780) can be connected to the same pin to overdrive the internal reference. The internal reference must be decoupled with a 0.1 µF ceramic capacitor to AGND.
How does the MODE pin affect AD7892AN-2 interface operation?
The MODE pin selects between parallel and serial interface modes: logic high enables 12-bit parallel output on DB0–DB11 with RD/CS control; logic low activates three-wire serial interface using RFS (frame sync), SCLK (serial clock), and SDATA (serial data) pins. In serial mode, DB11/LOW and DB10/LOW must be tied low, and DB9–DB0 are tri-stated. Interface mode must be set before conversion initiation and cannot be changed dynamically during operation.
What is the track/hold acquisition time for AD7892AN-2, and why does it matter?
The AD7892AN-2 has a track/hold acquisition time of 400 ns (max), defined as the time required for the internal amplifier to settle to ±1/2 LSB after returning to track mode post-conversion. This parameter dictates the minimum interval between consecutive conversions: initiating a new CONVST pulse before acquisition completes causes incomplete settling and introduces gain/offset errors. For reliable 500 kSPS operation, ensure ≥400 ns gap between EOC falling edge and next CONVST rising edge.
Can AD7892AN-2 operate from a supply voltage other than +5 V?
No - AD7892AN-2 is specified only for +5 V ±5% (4.75 V to 5.25 V) operation per its Absolute Maximum Ratings and electrical specifications. Supply voltages outside this range risk violating timing parameters (e.g., tCONV, tACQ), degrading DC accuracy (full-scale/offset error), or causing functional failure. The device draws 18 mA typical in normal operation and 250 µA in standby; ensure the power supply maintains regulation under these dynamic loads.
AD7892AN-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:
- 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:
- -
AD7892AN-2 FAQ
1.How can I place an order for AD7892AN-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892AN-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 AD7892AN-2 reliable?
The price and inventory of AD7892AN-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892AN-2 is usually 5 days.
3.What payment methods are accepted for AD7892AN-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892AN-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892AN-2?
AD7892AN-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892AN-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 AD7892AN-2?
For technical support, including AD7892AN-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892AN-2 requirements.
6.How does Aetrix verify that AD7892AN-2 is sourced from the original manufacturer or authorized distributors?
All AD7892AN-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 AD7892AN-2 meets industry standards.
7.What is the process for return or replacement of AD7892AN-2?
All AD7892AN-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892AN-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 AD7892AN-2 part is unused and in its original packaging.
Return procedure for AD7892AN-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7892AN-2 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…
