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Analog Devices Inc. AD7892ANZ-2
- Part No.:
- AD7892ANZ-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7892ANZ-2.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,277
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Product details
Overview
AD7892ANZ-2 from Analog Devices is a 12-bit, single-supply successive approximation ADC with 500 kSPS throughput, ±1 LSB relative accuracy, 0 V to +2.5 V unipolar input range, and integrated track/hold amplifier - used in portable data acquisition systems requiring low-power, high-speed analog digitization.
For engineers reviewing the AD7892ANZ-2 datasheet, AD7892ANZ-2 pinout, AD7892ANZ-2 application, or AD7892ANZ-2 equivalent, key selection criteria include unipolar input compliance, serial/parallel interface flexibility, standby power (250 µA typ), internal +2.5 V reference tolerance (±10 mV at +25°C), and SOIC-24 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The AD7892ANZ-2 implements a 1.6 µs conversion time with 400 ns track/hold acquisition, enabling precise sampling of fast-changing unipolar signals up to 250 kHz Nyquist bandwidth. Its LC2MOS process integrates bipolar precision circuitry with CMOS logic for low power and high linearity.
It features dual interface modes controlled by the MODE pin: parallel 12-bit output (DB0–DB11) or three-wire serial (RFS/SCLK/SDATA), with straight binary coding optimized for microcontroller interfacing. The on-chip +2.5 V reference is buffered and decoupled via REF OUT/REF IN, supporting external reference overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes across full operating range |
| Throughput Rate | 500 kSPS - supports real-time sampling of signals up to 250 kHz without aliasing |
| Analog Input Range | 0 V to +2.5 V - unipolar range matched to sensor outputs and DAC references |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and <0.025% full-scale error for precision measurement |
| Power Consumption | 60 mW typ at +5 V - enables battery-powered operation with 250 µA standby current |
| Reference Output | +2.5 V ±10 mV at +25°C - stable internal reference eliminates need for external voltage source |
| Conversion Time | 1.6 µs max - defines minimum inter-conversion interval in high-speed sequencing |
Pinout & Package
AD7892ANZ-2 is housed in a 24-lead SOIC (R-24) package with standard 0.3" body width and 1.27 mm pitch. Pin functions are electrically validated per Analog Devices' official pin description table and timing diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Analog input (unipolar) | Accepts 0 V to +2.5 V signal referenced to VIN2; primary digitization path |
| VIN2 | Analog reference node | Must be tied to AGND for AD7892ANZ-2; sets common-mode baseline for unipolar input |
| REF OUT/REF IN | Reference I/O | Provides +2.5 V internal reference or accepts external 2.375–2.625 V source; requires 0.1 µF AGND decoupling |
| MODE | Interface select | Logic high = parallel mode (DB0–DB11 active); logic low = serial mode (RFS/SCLK/SDATA active) |
| CONVST | Start trigger | Rising-edge initiates track-to-hold transition and conversion sequence |
| EOC | Status indicator | Active-low pulse (100 ns nominal width) signals completion of conversion |
| RD & CS | Parallel read control | Both low enable three-state DB0–DB11 outputs; timing-critical for bus access |
| DB0–DB11 | Data outputs | 12-bit straight binary output (LSB = DB0, MSB = DB11) in parallel mode; tri-stated in serial mode |
Key Features
| Feature | Design Value |
|---|---|
| Unipolar 0 V to +2.5 V input | Optimized for sensor front-ends and DAC feedback loops without level-shifting circuitry |
| Single +5 V supply operation | Eliminates dual-rail design complexity and reduces BOM count in portable instrumentation |
| Integrated track/hold amplifier | Acquires full-scale step inputs within 400 ns, enabling accurate sampling at 500 kSPS |
| Flexible serial/parallel interface | Reduces MCU GPIO usage via 3-wire serial or enables high-speed parallel bus coupling |
| Low-power standby mode | Draws only 250 µA typical, extending battery life in intermittent-sampling applications |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
Use Scenario: Battery-powered environmental monitoring units acquiring temperature, humidity, and pressure sensor outputs at 100–500 Hz. IC Role / Device Role / Timing Role: ADC digitizing conditioned analog outputs from analog front-end op-amps; synchronized via CONVST pulses from microcontroller timer. Use Value: 250 µA standby current extends 2-year battery life; 0 V to +2.5 V input range matches ratiometric sensor outputs directly. |
Use Scenario: PLC analog input modules converting 4–20 mA loop signals (via precision shunt) into digital values for control algorithms. IC Role / Device Role / Timing Role: High-accuracy digitizer interfaced via parallel bus to ARM Cortex-M4 host; EOC triggers DMA transfer. Use Value: ±1 LSB relative accuracy ensures <0.025% measurement fidelity across –40°C to +85°C; SOIC-24 simplifies automated assembly. |
| Medical Vital Sign Monitors | Test & Measurement Equipment |
Use Scenario: Portable ECG/EEG devices digitizing amplified biopotential signals with minimal noise injection. IC Role / Device Role / Timing Role: Front-end ADC with internal +2.5 V reference eliminating external reference drift; MODE pin selects serial interface for compact MCU connection. Use Value: 70 dB SNR at 100 kHz enables clean extraction of low-amplitude physiological waveforms; low 60 mW dissipation prevents thermal artifact. |
Use Scenario: Benchtop oscilloscope auxiliary channels or function generator feedback paths requiring calibrated 12-bit resolution. IC Role / Device Role / Timing Role: Precision digitizer capturing calibration reference signals; parallel interface allows burst-mode acquisition into FPGA memory buffers. Use Value: 500 kSPS throughput supports 200 kHz effective bandwidth; straight binary coding simplifies FPGA arithmetic pipeline integration. |
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-2 | Same SOIC-24 package and electrical specs; A-grade (–40°C to +85°C), no Z-suffix - identical performance and pinout | No difference: both rated for commercial temperature range and unipolar 0 V to +2.5 V input | Select AD7892AR-2 if RoHS-compliant lead-free finish is required; AD7892ANZ-2 uses matte tin lead finish. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, 2.7–5.25 V supply; no internal reference - requires external 2.5 V reference | Lacks parallel interface and integrated reference; lower throughput limits dynamic signal capture | Choose ADS7822U only for space-constrained designs where SPI simplicity outweighs speed and reference integration needs. |
Compared with AD7892AR-2, AD7892ANZ-2 offers identical functionality with matte tin leads instead of lead-free; versus ADS7822U, AD7892ANZ-2 delivers 2.5× higher throughput, built-in reference, and dual-interface flexibility - critical for mixed-signal system scalability.
Availability
AD7892ANZ-2 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical monitoring systems requiring stable component supply, long-term lifecycle support, and SOIC-24 packaging compatibility.
Supply support for AD7892ANZ-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 family was designed as a low-power, single-supply 12-bit SAR ADC platform targeting portable and embedded data acquisition - emphasizing interface flexibility, integrated reference, and robustness across industrial temperature ranges.
FAQ
What is the input voltage range supported by the AD7892ANZ-2?
The AD7892ANZ-2 supports a unipolar analog input range of 0 V to +2.5 V on VIN1 when VIN2 is connected to AGND. This range is fixed for the -2 variant and does not support bipolar configurations. Input overvoltage protection is not provided for this variant, so input signals must remain strictly within the 0 V to +2.5 V window to avoid damage or measurement error.
Does the AD7892ANZ-2 include an internal voltage reference?
Yes, the AD7892ANZ-2 includes an on-chip +2.5 V reference accessible via the REF OUT/REF IN pin. At +25°C, its accuracy is ±10 mV, with a typical temperature coefficient of 25 ppm/°C and a maximum error of ±25 mV over –40°C to +85°C. A 0.1 µF ceramic capacitor to AGND is required for stability when using the internal reference.
How does the MODE pin affect the AD7892ANZ-2 interface behavior?
The MODE pin selects between parallel and serial operation: logic high enables the 12-bit parallel interface (DB0–DB11 active), while logic low activates the three-wire serial interface (RFS, SCLK, SDATA). In serial mode, DB11/LOW and DB10/LOW must be tied low, and DB9–DB0 are tri-stated. The MODE state must be set before CONVST assertion.
What is the power consumption of the AD7892ANZ-2 in standby mode?
The AD7892ANZ-2 draws 250 µA typical (100 µA max) in standby mode when STANDBY is driven low. This reduces normal-operation power (60 mW typ) to approximately 1.25 mW, making it suitable for duty-cycled data acquisition. Note that a 30 µs delay is required after exiting standby before initiating the next conversion.
Is the AD7892ANZ-2 pin-compatible with other AD7892 variants?
Yes, all AD7892 variants - including AD7892ANZ-2, AD7892AR-2, AD7892BN-2, and AD7892BR-2 - share identical 24-pin SOIC (R-24) or PDIP (N-24) footprints and pin functions. Electrical differences (e.g., ±1 LSB accuracy in B-grade parts) do not affect mechanical or logical pin compatibility, enabling drop-in replacement within the same input-range variant group.
AD7892ANZ-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:
- -
AD7892ANZ-2 FAQ
1.How can I place an order for AD7892ANZ-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892ANZ-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 AD7892ANZ-2 reliable?
The price and inventory of AD7892ANZ-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892ANZ-2 is usually 5 days.
3.What payment methods are accepted for AD7892ANZ-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892ANZ-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892ANZ-2?
AD7892ANZ-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892ANZ-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 AD7892ANZ-2?
For technical support, including AD7892ANZ-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892ANZ-2 requirements.
6.How does Aetrix verify that AD7892ANZ-2 is sourced from the original manufacturer or authorized distributors?
All AD7892ANZ-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 AD7892ANZ-2 meets industry standards.
7.What is the process for return or replacement of AD7892ANZ-2?
All AD7892ANZ-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892ANZ-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 AD7892ANZ-2 part is unused and in its original packaging.
Return procedure for AD7892ANZ-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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