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Analog Devices Inc. AD7893BNZ-10
- Part No.:
- AD7893BNZ-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7893BNZ-10.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,650
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Product details
Overview
AD7893BNZ-10 from Analog Devices is a 12-bit successive-approximation ADC with ±10 V analog input range, 6 µs conversion time, on-chip track/hold amplifier, and high-speed two-wire serial interface (SCLK/SDATA), operating from a single +5 V supply and consuming 25 mW typical power. It targets precision data acquisition in industrial control, test equipment, and embedded instrumentation where space-constrained 8-pin SOIC packaging and bipolar signal conditioning are required.
For engineers reviewing the AD7893BNZ-10 datasheet, AD7893BNZ-10 pinout, AD7893BNZ-10 application, or AD7893BNZ-10 equivalent, key selection criteria include its ±10 V input range compatibility, twos-complement output coding, 70 dB SNR at 10 kHz, ±1 LSB relative accuracy, and timing-critical 600 ns minimum inter-conversion gap for full-spec operation.
Technical Context
The AD7893BNZ-10 implements a laser-trimmed internal clock driving a 12-bit R-2R ladder SAR core, with integrated track/hold enabling accurate sampling of full-scale sine waves up to 58 kHz. Its analog front-end includes resistor-scaling network (R1=30 kΩ, R2=7.5 kΩ, R3=10 kΩ) for ±10 V input mapping and buffered 2.5 V reference input (±5% tolerance, ≤1 µA current).
Control logic is edge-triggered: CONVST rising edge initiates hold mode and conversion start; SCLK rising edge clocks out 16-bit serial frame (4 leading zeros + 12-bit twos-complement result); SDATA is three-stated after the 16th falling SCLK edge. No BUSY or EOC signal is provided-timing synchronization relies entirely on fixed 6 µs conversion + 600 ns acquisition guard band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit-guarantees no missing codes; defines 4096 discrete quantization levels. |
| Input Range | ±10 V-supports bipolar industrial sensor signals without external level-shifting circuitry. |
| Conversion Time | 6 µs max-enables 117 kHz maximum throughput when paired with 600 ns acquisition guard band. |
| Signal-to-(Noise+Distortion) | 70 dB min at 10 kHz-meets precision measurement requirements for 10-bit effective resolution. |
| Relative Accuracy | ±1 LSB max-ensures monotonicity and predictable code transitions across full scale. |
| Power Dissipation | 25 mW typical at +5 V-enables use in battery-powered portable instruments with thermal constraints. |
| Output Coding | Twos-complement-directly represents signed values from −2048 to +2047 for ±10 V full-scale range. |
Pinout & Package
AD7893BNZ-10 is housed in an 8-pin SOIC (SO-8) package, 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Accepts buffered +2.5 V ±5% external reference; gain/offset errors scale directly with reference drift. |
| 2 - VIN | Analog input channel | ±10 V input range with 16 kΩ min input resistance; resistor-scaling network enables bipolar operation from single +5 V supply. |
| 3 - AGND | Analog ground reference | Separate ground return for track/hold, comparator, and DAC; must be star-connected to minimize noise coupling into analog path. |
| 4 - SCLK | Serial clock input | External clock up to 8.33 MHz; rising edge clocks out data; falling edge validates data; must go low between reads. |
| 5 - SDATA | Serial data output | 16-bit frame (4 zeros + 12-bit twos-complement); three-stated after 16th falling SCLK edge; requires external pull-up for open-drain compatibility. |
| 6 - DGND | Digital ground reference | Isolated ground for serial interface logic; must be connected to AGND at single point near device to avoid ground loops. |
| 7 - CONVST | Convert start trigger | Falling edge resets serial counter; rising edge initiates track→hold transition and starts 6 µs conversion-no status signal available. |
| 8 - VDD | Positive supply | +5 V ±5%; powers analog and digital sections; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold amplifier | Acquires input to 12-bit accuracy in ≤1.5 µs; eliminates need for external sample-and-hold, reducing BOM and layout complexity. |
| Single-supply +5 V operation | Enables direct integration into 5 V microcontroller systems without dual-rail supplies or level translators. |
| High-speed serial interface | Two-wire (SCLK/SDATA) reduces PCB routing congestion and I/O pin count versus parallel interfaces. |
| LC2MOS process technology | Combines bipolar precision for analog performance with CMOS low power-achieves 70 dB SNR at 25 mW. |
| 8-pin SOIC packaging | Minimizes footprint (≈19 mm²) while maintaining manufacturability in automated SMT lines. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous monitoring of ±10 V output signals from strain gauges, RTD transmitters, and isolation amplifiers in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC digitizing bipolar sensor outputs; synchronized to system controller via CONVST edge triggering and fixed 6 µs latency. Use Value: Eliminates external signal conditioning for ±10 V ranges, reducing component count and calibration drift in harsh industrial environments. | Use Scenario: High-throughput voltage measurement in benchtop multimeters and parametric testers requiring >100 kSPS sampling with 12-bit fidelity. IC Role / Device Role / Timing Role: Standalone serial ADC interfaced to FPGA or DSP; leverages 117 kHz max throughput and deterministic 6 µs conversion window. Use Value: Enables compact, low-power ATE modules with minimal board area-critical for multi-channel rack-mounted systems. |
| Portable Data Loggers | Motor Drive Current Sensing |
Use Scenario: Battery-powered field recorders capturing vibration, temperature, and pressure waveforms over extended periods. IC Role / Device Role / Timing Role: Low-power ADC acquiring conditioned analog inputs; powered from regulated 5 V rail; sleep/wake controlled via CONVST gating. Use Value: 25 mW typical dissipation extends battery life; SOIC package supports compact, ruggedized enclosure designs. | Use Scenario: Isolated phase-current feedback in servo drives using ±10 V isolated amplifier outputs (e.g., AMC1301). IC Role / Device Role / Timing Role: Real-time current digitization synchronized to PWM switching cycles; track/hold captures fast transient peaks during commutation. Use Value: On-chip track/hold ensures accurate peak capture without external components; twos-complement output simplifies signed arithmetic in motor control algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7893AR-10 | Same architecture and specs, but rated for −40°C to +85°C (B-grade) vs. AD7893BNZ-10's −40°C to +85°C (B-grade); identical SO-8 package and pinout. | No functional difference-AR-10 uses different internal lot traceability and screening; both meet same electrical specs. | Select AD7893BNZ-10 for guaranteed B-grade qualification and documented production history with Analog Devices' standard commercial release. |
| ADS7822U | 12-bit SAR ADC with SPI interface, 7 µs conversion, ±10 V input via external op-amp scaling; requires external reference and separate track/hold. | Higher system-level design effort due to external signal conditioning; lacks integrated track/hold and internal scaling. | Choose ADS7822U only if migrating to TI's ecosystem or requiring SPI protocol compatibility; AD7893BNZ-10 offers lower total solution cost and smaller footprint. |
Compared with AD7893AR-10, AD7893BNZ-10 provides identical electrical performance but with enhanced manufacturing traceability and long-term supply assurance; versus ADS7822U, it delivers true plug-in functionality for ±10 V bipolar acquisition without external components-reducing design cycle time and validation risk.
Availability
AD7893BNZ-10 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, portable data loggers, and motor drive current sensing requiring stable component supply across extended product lifecycles.
Supply support for AD7893BNZ-10 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, headquartered in Wilmington, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7893 family was developed for space-constrained, low-power data acquisition systems requiring integrated signal conditioning and serial interfacing-targeting industrial, instrumentation, and portable measurement applications.
FAQ
What is the absolute maximum analog input voltage for AD7893BNZ-10?
The absolute maximum analog input voltage for AD7893BNZ-10 is ±17 V referenced to AGND. Exceeding this rating-even momentarily-may cause permanent damage. The specified operating range remains ±10 V; the ±17 V limit applies only to survival under fault conditions, not functional operation.
Does AD7893BNZ-10 require an external reference voltage?
Yes, AD7893BNZ-10 requires an external +2.5 V reference applied to the REF IN pin. The device includes an on-chip buffer, but no internal reference; precision references like the AD780 or AD680 are recommended to maintain ±1 LSB relative accuracy and minimize gain error.
How is data read from AD7893BNZ-10, and what is the serial format?
AD7893BNZ-10 outputs 16 bits serially: four leading zeros followed by 12 bits of twos-complement conversion data (MSB first). Data is clocked out on SCLK rising edges and valid on falling edges; SDATA is three-stated after the 16th falling SCLK edge. A complete read requires exactly 16 clock pulses.
Can AD7893BNZ-10 operate at throughput rates higher than 117 kHz?
Yes, AD7893BNZ-10 can achieve up to 133 kHz throughput by reading data during conversion, but this degrades dynamic performance: SNR drops ~1.5 dB and code flicker increases. For full-spec operation-including 70 dB SNR and ±1 LSB linearity-the maximum rate is 117 kHz, enforced by the 6 µs conversion + 600 ns acquisition guard band.
What is the purpose of the 600 ns inter-conversion gap in AD7893BNZ-10 timing?
The 600 ns gap after conversion completion and before the next CONVST rising edge allows the on-chip track/hold amplifier to fully acquire the new input signal to 12-bit accuracy. Skipping this delay causes aperture uncertainty and violates the specified ±1 LSB relative accuracy and 70 dB SNR performance.
AD7893BNZ-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 117k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7893BNZ-10 FAQ
1.How can I place an order for AD7893BNZ-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893BNZ-10 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 AD7893BNZ-10 reliable?
The price and inventory of AD7893BNZ-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893BNZ-10 is usually 5 days.
3.What payment methods are accepted for AD7893BNZ-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893BNZ-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893BNZ-10?
AD7893BNZ-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893BNZ-10 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 AD7893BNZ-10?
For technical support, including AD7893BNZ-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893BNZ-10 requirements.
6.How does Aetrix verify that AD7893BNZ-10 is sourced from the original manufacturer or authorized distributors?
All AD7893BNZ-10 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 AD7893BNZ-10 meets industry standards.
7.What is the process for return or replacement of AD7893BNZ-10?
All AD7893BNZ-10 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893BNZ-10, 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 AD7893BNZ-10 part is unused and in its original packaging.
Return procedure for AD7893BNZ-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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