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Analog Devices Inc. AD7893ARZ-10REEL7
- Part No.:
- AD7893ARZ-10REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7893ARZ-10REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,697
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Product details
Overview
AD7893ARZ-10REEL7 from Analog Devices is a 12-bit, serial-output analog-to-digital converter with ±10 V input range, 6 µs conversion time, and single +5 V supply operation. It integrates an on-chip track/hold amplifier, internal clock, and high-speed two-wire serial interface (SCLK/SDATA), and is used in precision data acquisition systems for industrial process control and test instrumentation.
For engineers reviewing the AD7893ARZ-10REEL7 datasheet, AD7893ARZ-10REEL7 pinout, AD7893ARZ-10REEL7 application, or AD7893ARZ-10REEL7 equivalent, key selection criteria include bipolar ±10 V input support, 70 dB SNR at 10 kHz, 1.5 µs track/hold acquisition time, twos-complement output coding, and SOIC-8 packaging with guaranteed no missing codes.
Technical Context
The AD7893ARZ-10REEL7 implements a successive-approximation ADC core with R-2R ladder architecture and laser-trimmed internal clock oscillator. Its analog front-end includes signal scaling resistors (30 kΩ/7.5 kΩ/10 kΩ) to support ±10 V full-scale range while operating from +5 V only.
Conversion is edge-triggered via CONVST rising edge, initiating hold mode and starting the 6 µs conversion cycle; serial readout requires 16 SCLK pulses delivering four leading zeros followed by 12-bit twos-complement data, with SDATA three-stated after the 16th falling SCLK edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits with guaranteed no missing codes - ensures monotonic transfer function for closed-loop control. |
| Input Range | ±10 V - supports industrial sensor outputs (e.g., ±10 V LVDT, strain gauge bridges) without external scaling. |
| Conversion Time | 6 µs max - enables up to 117 kHz sampling rate when paired with proper timing discipline. |
| SNR | 70 dB min at fIN = 10 kHz - sufficient for 11.3 effective bits in medium-speed precision measurement. |
| Power Dissipation | 25 mW typical at +5 V - enables use in thermally constrained or battery-backed DAQ modules. |
| Track/Hold Acquisition | 1.5 µs max - defines minimum inter-conversion delay to maintain 12-bit accuracy after input step changes. |
| Output Coding | Twos-complement - simplifies signed arithmetic in DSP-based real-time processing pipelines. |
Pinout & Package
AD7893ARZ-10REEL7 is housed in an 8-pin SOIC (SO-8) package with 1.27 mm pitch, 5.0 mm × 6.2 mm body, and gull-wing leads. Pin 1 marked by bevelled corner or dot.
| 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; designed for direct connection to bipolar transducer outputs. |
| 3 - AGND | Analog ground reference | Separate ground return for track/hold, comparator, and DAC; must be star-connected to minimize noise coupling. |
| 4 - SCLK | Serial clock input | Asynchronous master clock up to 8.33 MHz; rising edge clocks out data, falling edge validates SDATA. |
| 5 - SDATA | Serial data output | Three-state CMOS output delivering 16-bit frame (4 zeros + 12-bit twos-complement); disabled after 16th falling edge. |
| 6 - DGND | Digital ground reference | Isolated ground for logic circuitry; must be connected to AGND at single point near device. |
| 7 - CONVST | Convert start input | Falling edge resets serial counter; rising edge initiates track-to-hold transition and starts conversion sequence. |
| 8 - VDD | Positive supply | +5 V ±5% supply; powers analog and digital sections; decoupling capacitor required within 1 cm. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 12-bit ADC in 8-pin SOIC | Eliminates need for dual ±15 V supplies and external track/hold ICs - reduces BOM count and PCB area by >40% vs discrete solutions. |
| On-chip track/hold amplifier | Acquires ±10 V signals to 12-bit accuracy in ≤1.5 µs - removes requirement for external THA and associated layout complexity. |
| High-speed serial interface (2-wire) | Requires only SCLK and SDATA lines - enables direct connection to SPI peripherals without level-shifting or glue logic. |
| LC2MOS process technology | Combines bipolar precision with CMOS low power - achieves 70 dB SNR and 25 mW dissipation simultaneously. |
| Bipolar ±10 V input scaling | Integrated resistor network (30k/7.5k/10k Ω) referenced to +2.5 V - avoids external op-amp gain stages and matching resistor networks. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous monitoring of 4–20 mA current loops converted to ±10 V via precision shunt, feeding into PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC capturing sensor voltage with 12-bit resolution and 117 kHz throughput; CONVST synchronized to PLC scan cycle. Use Value: Enables direct digitization of legacy industrial signals without external signal conditioning, reducing system latency and calibration drift. | Use Scenario: High-accuracy voltage measurement subsystem in benchtop multimeters or parametric analyzers. IC Role / Device Role / Timing Role: Precision digitizer for DC/low-frequency AC measurements; operates in triggered acquisition mode with external reference stability. Use Value: Delivers 70 dB SNR and ±1 LSB relative accuracy - meets Class II DMM requirements per IEC/EN 61000-4-30. |
| Motor Drive Current Sensing | Medical Instrumentation |
Use Scenario: Isolated phase current feedback in servo drives using ±10 V isolated amplifiers (e.g., AMC1301). IC Role / Device Role / Timing Role: Bipolar ADC sampling motor current at 50–100 kHz; track/hold acquisition time ensures fidelity during PWM switching edges. Use Value: Supports real-time FOC algorithms with <1.5 µs acquisition window - maintains torque ripple <2% at full load. | Use Scenario: Patient vital sign acquisition in portable ECG or EEG devices requiring low-power, high-linearity analog front-end. IC Role / Device Role / Timing Role: Low-noise ADC for biopotential signal digitization; powered from regulated +5 V rail with battery backup. Use Value: 25 mW typical power enables >8-hour runtime on coin-cell; 70 dB SNR supports ≥100 dB common-mode rejection ratio. |
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 |
|---|---|---|---|
| AD7490BRUZ | 16-bit SAR ADC, 1 MSPS, SPI interface, ±10 V input supported via external resistor network only. | Higher resolution but requires external scaling and more complex layout; consumes 12 mW at 1 MSPS. | Select when 16-bit resolution and higher throughput outweigh board space and design complexity constraints. |
| ADS7822U | 12-bit SAR ADC, 200 kSPS, SPI interface, unipolar 0–5 V input only; no built-in ±10 V scaling. | Lacks bipolar input capability and integrated track/hold; requires external op-amp for signal conditioning. | Choose for cost-sensitive unipolar applications where ±10 V support is unnecessary and lower price is critical. |
Compared with AD7893ARZ-10REEL7, AD7490BRUZ offers higher resolution but demands external components for ±10 V operation, while ADS7822U lacks native bipolar support and track/hold - making AD7893ARZ-10REEL7 uniquely suited for compact, self-contained ±10 V data acquisition.
Availability
AD7893ARZ-10REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, and motor drive current sensing requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for AD7893ARZ-10REEL7 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 AD7893 product line delivers compact, single-supply 12-bit ADCs for space-constrained industrial and instrumentation applications where ±10 V bipolar input, low power, and serial simplicity are essential.
FAQ
What input voltage range does the AD7893ARZ-10REEL7 support?
The AD7893ARZ-10REEL7 supports a bipolar ±10 V analog input range, optimized for industrial sensors and transducers. This range is achieved via on-chip resistor scaling and requires a +2.5 V reference applied to the REF IN pin. Input resistance is specified at 16 kΩ minimum, and the device guarantees no missing codes across the full range.
How does the AD7893ARZ-10REEL7 handle serial data output?
The AD7893ARZ-10REEL7 uses a two-wire serial interface: SCLK (input) and SDATA (output). It outputs 16 bits per conversion - four leading zeros followed by 12-bit twos-complement data - with data valid on the falling edge of SCLK. After the 16th falling edge, SDATA enters high-impedance state, eliminating bus contention in multi-device systems.
What is the conversion time and maximum sampling rate of the AD7893ARZ-10REEL7?
The AD7893ARZ-10REEL7 has a maximum conversion time of 6 µs. When combined with 1.92 µs serial read time and 0.6 µs acquisition guardband, it achieves a sustained throughput rate of 117 kHz. Higher rates up to 133 kHz are possible but incur ~1.5 dB SNR degradation and increased code flicker per the datasheet's timing section.
Does the AD7893ARZ-10REEL7 include an on-chip track/hold amplifier?
Yes, the AD7893ARZ-10REEL7 integrates a track/hold amplifier with ≤1.5 µs acquisition time to 12-bit accuracy. It transitions automatically from track to hold on the rising edge of CONVST, enabling accurate digitization of fast-changing ±10 V signals without external components - a key differentiator versus basic SAR ADCs.
What package type and RoHS status does the AD7893ARZ-10REEL7 have?
The AD7893ARZ-10REEL7 is supplied in an 8-pin SOIC (SO-8) package with lead-free (Pb-free) terminations and RoHS compliance. The "RZ" suffix confirms RoHS-compliant packaging, and "REEL7" indicates 7-inch tape-and-reel packaging with 2500 units per reel - suitable for automated SMT assembly.
AD7893ARZ-10REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7893ARZ-10REEL7 FAQ
1.How can I place an order for AD7893ARZ-10REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893ARZ-10REEL7 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 AD7893ARZ-10REEL7 reliable?
The price and inventory of AD7893ARZ-10REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893ARZ-10REEL7 is usually 5 days.
3.What payment methods are accepted for AD7893ARZ-10REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893ARZ-10REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893ARZ-10REEL7?
AD7893ARZ-10REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893ARZ-10REEL7 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 AD7893ARZ-10REEL7?
For technical support, including AD7893ARZ-10REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893ARZ-10REEL7 requirements.
6.How does Aetrix verify that AD7893ARZ-10REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7893ARZ-10REEL7 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 AD7893ARZ-10REEL7 meets industry standards.
7.What is the process for return or replacement of AD7893ARZ-10REEL7?
All AD7893ARZ-10REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893ARZ-10REEL7, 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 AD7893ARZ-10REEL7 part is unused and in its original packaging.
Return procedure for AD7893ARZ-10REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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