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Analog Devices Inc. AD7892BNZ-3
- Part No.:
- AD7892BNZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7892BNZ-3.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
AD7892BNZ-3 from Analog Devices is a 12-bit, single-supply successive approximation ADC with 600 kSPS throughput, ±2.5 V analog input range, 1.47 µs conversion time, and integrated track/hold amplifier-designed for high-speed data acquisition in industrial instrumentation and real-time control systems.
For engineers reviewing the AD7892BNZ-3 datasheet, AD7892BNZ-3 pinout, AD7892BNZ-3 application, or AD7892BNZ-3 equivalent, key selection criteria include its LC2MOS process, dual serial/parallel interface, ±1 LSB relative accuracy, on-chip +2.5 V reference, and 24-pin PDIP package compatibility with legacy embedded signal chains.
Technical Context
The AD7892BNZ-3 implements a 12-bit SAR architecture with internal track/hold amplifier and selectable interface mode (MODE pin-controlled). Its conversion sequence is triggered by CONVST rising edge, with EOC signaling completion via 100 ns pulse width.
It operates exclusively from a +5 V ±5% supply, uses two's complement output coding, and supports both internal +2.5 V reference (REF OUT/REF IN pin) and external reference overdrive-enabling precise gain calibration in precision measurement front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic transfer function with no missing codes. |
| Throughput Rate | 600 kSPS - maximum sampling rate enabled by 1.47 µs conversion + 200 ns acquisition time. |
| Analog Input Range | ±2.5 V - bipolar full-scale range referenced to AGND, compatible with differential sensor outputs. |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity error within 0.024% of full scale for calibrated systems. |
| Power Dissipation | 60 mW typ at +5 V - enables low-heat operation in compact industrial modules without forced cooling. |
| Reference Voltage | +2.5 V nominal - internally generated, ±10 mV error at +25°C, 25 ppm/°C tempco for stable gain over temperature. |
| Digital Interface | Parallel (12-bit DB0–DB11) or 3-wire serial (RFS/SCLK/SDATA) - selectable via MODE pin for MCU or DSP integration flexibility. |
Pinout & Package
AD7892BNZ-3 is housed in a 24-lead, 0.3" wide plastic DIP (N-24 package), with through-hole mounting and industry-standard footprint for legacy PCB designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive Supply | +5 V ±5% power rail; decoupling required near pin for noise-sensitive analog performance. |
| STANDBY (Pin 2) | Power Mode Control | Logic high = active mode; logic low = standby (75 µW typical power draw). |
| VIN2 (Pin 3) | Analog Reference Node | Must be tied to AGND for AD7892BNZ-3; floating or misconnected violates ±2.5 V input specification. |
| VIN1 (Pin 4) | Main Analog Input | Accepts ±2.5 V differential input; overvoltage tolerant to ±7 V without damage. |
| REF OUT/REF IN (Pin 5) | Reference I/O | Provides +2.5 V buffered reference output or accepts external +2.5 V source to override internal reference. |
| AGND (Pin 6) | Analog Ground | Separate ground return for track/hold, DAC, and comparator-must be star-connected to minimize noise coupling. |
| MODE (Pin 7) | Interface Selector | High = parallel mode (DB0–DB11 active); low = serial mode (RFS/SCLK/SDATA active). |
| DB11/LOW (Pin 8) | Data Bit 11 / Test Pin | In parallel mode: MSB output; in serial mode: must be hard-wired low for functional operation. |
| DB10/LOW (Pin 9) | Data Bit 10 / Test Pin | In parallel mode: TTL-compatible output; in serial mode: must be hard-wired low. |
| DB0 (Pin 20) | Data Bit 0 (LSB) | Two's complement output coding; three-state drive; requires pull-up if bus-shared. |
| RD (Pin 21) | Read Strobe | Active-low control enabling data bus output; timing-critical for <35 ns access after RD falling edge. |
| CS (Pin 22) | Chip Select | Active-low enable for parallel interface; must be asserted with RD to release DB0–DB11. |
| EOC (Pin 23) | End-of-Conversion Flag | Active-low pulse (100 ns typ) indicating valid data ready; usable as interrupt trigger for microcontrollers. |
| CONVST (Pin 24) | Convert Start | Rising-edge-triggered command initiating track-to-hold transition and ADC conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| LC2MOS Process Integration | Combines precision bipolar analog circuitry with low-power CMOS logic for 60 mW operation and 12-bit DC/dynamic accuracy. |
| On-Chip Track/Hold Amplifier | Acquires ±2.5 V input to 12-bit accuracy in ≤200 ns-eliminates need for external THA in high-speed DAQ designs. |
| Flexible Dual-Mode Interface | Single MODE pin selects between 12-bit parallel bus (for fast microprocessor access) or 3-wire serial (for minimal pin-count microcontroller links). |
| Overvoltage Protected Inputs | Withstands ±7 V on VIN1 without latch-up or parametric shift-enables direct connection to industrial transducers with transient exposure. |
| Internal +2.5 V Reference | Buffered output with 5.5 kΩ source impedance, ±10 mV initial error, and 25 ppm/°C drift-reduces BOM count and layout complexity. |
Applications
| Industrial Data Acquisition | Real-Time Motor Control |
|---|---|
Use Scenario: High-speed voltage/current monitoring in PLC analog input modules sampling multiple channels at ≥500 kSPS. IC Role / Device Role / Timing Role: Primary ADC capturing ±2.5 V feedback signals from isolated current shunts and resolvers. Use Value: 600 kSPS throughput and 200 ns acquisition time enable closed-loop update rates up to 100 kHz with deterministic latency. | Use Scenario: Position and torque sensing in servo drives using resolver-to-digital conversion auxiliary paths. IC Role / Device Role / Timing Role: Secondary ADC digitizing analog resolver excitation or error signals synchronized to PWM carrier. Use Value: ±2.5 V input range matches resolver secondary output amplitude; two's complement coding simplifies signed arithmetic in FOC algorithms. |
| Portable Test Equipment | Medical Signal Conditioning |
Use Scenario: Battery-powered handheld oscilloscopes requiring low-power, high-accuracy sampling of ±2.5 V sensor outputs. IC Role / Device Role / Timing Role: Core acquisition IC operating in STANDBY mode between triggers to extend battery life. Use Value: 75 µW standby power and single +5 V supply eliminate need for charge pumps or dual-rail regulators. | Use Scenario: Isolated patient-monitoring front-end digitizing biopotential signals (ECG, EEG) with ±2.5 V dynamic range. IC Role / Device Role / Timing Role: Precision ADC interfaced via serial mode to low-noise ARM Cortex-M microcontroller. Use Value: Internal +2.5 V reference eliminates external reference drift contribution to system offset stability over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ-3 | Same electrical specs, but in 24-lead SOIC (R-24) package-smaller footprint, surface-mount only. | Preferred for new PCB designs targeting automated assembly and space-constrained layouts. | Select AD7892BRZ-3 when board area and reflow compatibility outweigh legacy DIP requirements. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, +2.7 V to +5.25 V supply, no internal reference-requires external REF. | Suitable for ultra-low-power portable devices where throughput >200 kSPS is not required. | Choose ADS7822U only if serial-only interface, lower power budget (<10 mW), and external reference tolerance are acceptable trade-offs. |
Compared with AD7892BNZ-3, AD7892BRZ-3 offers identical performance in a smaller SOIC package but lacks through-hole compatibility, while ADS7822U sacrifices speed and integration for lower power and simpler digital interface-neither is pin-compatible, and both require layout changes and firmware adaptation.
Availability
AD7892BNZ-3 is available at Aetrix Electronics and suitable for industrial data acquisition, real-time motor control, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7892BNZ-3 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7892 product line delivers high-speed, single-supply 12-bit ADCs with integrated references and flexible interfaces-designed specifically for precision data acquisition in space- and power-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7892BNZ-3?
The AD7892BNZ-3 supports a maximum throughput rate of 600 kSPS, achieved via a 1.47 µs conversion time and 200 ns track/hold acquisition time. This rate is guaranteed under specified conditions: VDD = +5 V ±5%, TMIN to TMAX, and proper decoupling. Exceeding this rate risks missing codes or degraded SNR due to insufficient acquisition settling.
Does the AD7892BNZ-3 require an external reference voltage?
No, the AD7892BNZ-3 includes an internal +2.5 V reference accessible at the REF OUT/REF IN pin. When used, it requires only a 0.1 µF ceramic capacitor to AGND for stability. An external +2.5 V reference may be connected to this same pin to override the internal source-useful for systems demanding tighter initial accuracy or matched reference sharing.
How does the MODE pin affect the AD7892BNZ-3 interface behavior?
The MODE pin configures the AD7892BNZ-3 for either parallel or serial operation: logic high enables 12-bit parallel output on DB0–DB11 with CS/RD control, while logic low activates the 3-wire serial interface (RFS/SCLK/SDATA). Pins DB11/LOW and DB10/LOW must be hard-wired low in serial mode-failure to do so causes undefined behavior or data corruption.
What is the purpose of the STANDBY pin on the AD7892BNZ-3?
The STANDBY pin places the AD7892BNZ-3 into low-power mode when driven logic low, reducing supply current to 80 µA max (75 µW typical). A conversion must not be initiated within 30 µs after exiting standby. This feature enables power gating in battery-operated instruments without sacrificing wake-up responsiveness or measurement repeatability.
Can the AD7892BNZ-3 accept input voltages beyond its specified ±2.5 V range?
Yes-the AD7892BNZ-3 analog inputs are overvoltage protected to ±7 V relative to AGND without damage or parametric shift. However, accurate conversion is only guaranteed within the ±2.5 V range. Signals exceeding this range will clip or saturate, producing invalid codes; protection applies only to fault conditions, not extended-range operation.
AD7892BNZ-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 600k
- 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-3 FAQ
1.How can I place an order for AD7892BNZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7892BNZ-3 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-3 reliable?
The price and inventory of AD7892BNZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7892BNZ-3 is usually 5 days.
3.What payment methods are accepted for AD7892BNZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7892BNZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7892BNZ-3?
AD7892BNZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7892BNZ-3 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-3?
For technical support, including AD7892BNZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7892BNZ-3 requirements.
6.How does Aetrix verify that AD7892BNZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7892BNZ-3 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-3 meets industry standards.
7.What is the process for return or replacement of AD7892BNZ-3?
All AD7892BNZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7892BNZ-3, 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-3 part is unused and in its original packaging.
Return procedure for AD7892BNZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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