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Analog Devices Inc. AD7893ARZ-2REEL7
- Part No.:
- AD7893ARZ-2REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7893ARZ-2REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
AD7893ARZ-2REEL7 from Analog Devices is a 12-bit, serial-output analog-to-digital converter with 6 µs conversion time, single +5 V supply operation, and integrated track/hold amplifier. It supports 0 V to +2.5 V unipolar input range, straight binary output coding, and delivers 70 dB SNR at 10 kHz input - used in precision data acquisition systems for industrial sensor interfacing.
For engineers reviewing the AD7893ARZ-2REEL7 datasheet, AD7893ARZ-2REEL7 pinout, AD7893ARZ-2REEL7 application, or AD7893ARZ-2REEL7 equivalent, key selection criteria include its 8-pin SOIC package, 1.5 µs track/hold acquisition time, ±1 LSB relative accuracy, 25 mW typical power dissipation, and compatibility with microcontroller serial interfaces requiring minimal board space.
Technical Context
The AD7893ARZ-2REEL7 implements a successive-approximation ADC core with on-chip R-2R ladder DAC and laser-trimmed internal clock oscillator. Its analog input directly drives the track/hold amplifier without external scaling resistors, optimized for 0 V to +2.5 V full-scale range referenced to a buffered +2.5 V external reference.
It uses a two-wire high-speed serial interface: SCLK controls timing, and SDATA outputs 16-bit frames (four leading zeros + 12-bit conversion result) with data valid on SCLK falling edges. Conversion is edge-triggered via CONVST rising edge, and the part returns to track mode 6 µs later.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes over full operating temperature range |
| Conversion Time | 6 µs max - enables up to 117 kHz sampling rate when read timing is synchronized |
| Analog Input Range | 0 V to +2.5 V - requires external +2.5 V reference; input current ≤500 nA |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and linearity within endpoint nonlinearity spec |
| Power Dissipation | 25 mW typical - supports battery-powered or thermally constrained embedded designs |
| SNR | 70 dB min at 10 kHz - meets precision measurement requirements for sensor signal chains |
| Track/Hold Acquisition | 1.5 µs max - defines minimum inter-conversion delay for full 12-bit settling |
Pinout & Package
AD7893ARZ-2REEL7 is housed in an 8-pin small outline IC (SOIC) package with 1.27 mm pitch, RoHS-compliant, tape-and-reel format (REEL7 = 1000-piece reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage Reference Input | Buffered +2.5 V reference input; max 1 µA input current; determines full-scale gain |
| 2 - VIN | Analog Input Channel | High-impedance input for 0 V to +2.5 V unipolar signals; no dynamic charging current |
| 3 - AGND | Analog Ground | Separate ground return for track/hold, comparator, and DAC; must be isolated from DGND |
| 4 - SCLK | Serial Clock Input | External clock up to 8.33 MHz; rising edge clocks data out; falling edge validates data |
| 5 - SDATA | Serial Data Output | Three-state output; provides 16-bit frame (4 zeros + 12-bit result); disabled after 16th SCLK fall |
| 6 - DGND | Digital Ground | Ground reference for logic circuitry; must be connected to system digital ground plane |
| 7 - CONVST | Convert Start | Rising-edge triggered; initiates hold mode and conversion; falling edge resets shift register |
| 8 - VDD | Positive Supply | +5 V ±5% supply; powers analog and digital sections; IDD ≤9 mA max |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 12-bit ADC in 8-pin SOIC | Eliminates need for dual supplies and external track/hold; reduces PCB area vs. multi-chip solutions |
| On-chip track/hold amplifier | Acquires input to 12-bit accuracy in ≤1.5 µs; supports full-scale sine wave inputs up to >58 kHz |
| High-speed serial interface | Two-wire (SCLK/SDATA) interface compatible with standard microcontroller SPI peripherals |
| Unipolar 0 V to +2.5 V input range | Optimized for low-voltage sensors and instrumentation amplifiers; eliminates level-shifting circuitry |
| LC2MOS process technology | Combines bipolar precision with CMOS low power; achieves 25 mW typical dissipation at +5 V |
Applications
| Industrial Sensor Signal Conditioning | Portable Data Loggers |
|---|---|
Use Scenario: Digitizing outputs from RTDs, thermocouples, and strain gauges conditioned by low-noise instrumentation amplifiers. IC Role / Device Role / Timing Role: Primary ADC capturing calibrated analog sensor voltages with 12-bit resolution and minimal latency. Use Value: Enables direct interface to 0 V to +2.5 V amplifier outputs without external level shifting or gain adjustment. |
Use Scenario: Battery-powered environmental monitoring units measuring temperature, humidity, and pressure over extended periods. IC Role / Device Role / Timing Role: Low-power ADC acquiring sensor data at ≤100 kHz rates while minimizing active time per sample. Use Value: 25 mW typical power and single +5 V supply reduce battery drain and simplify power architecture. |
| Automated Test Equipment (ATE) Front-End | Medical Instrumentation Signal Chain |
Use Scenario: High-throughput benchtop test systems digitizing multiple analog channels with precise timing control. IC Role / Device Role / Timing Role: Serial-output ADC synchronized to system clock via CONVST and SCLK for deterministic sampling. Use Value: 6 µs conversion + 1.5 µs acquisition allows ≥117 kHz sustained throughput with verified DC and AC specs. |
Use Scenario: Patient monitoring devices digitizing ECG, EEG, or pulse oximetry signals requiring low noise and high fidelity. IC Role / Device Role / Timing Role: Precision ADC stage following analog filtering and amplification, delivering 70 dB SNR at 10 kHz. Use Value: Straight binary coding and ±1 LSB relative accuracy support accurate amplitude quantization for diagnostic analysis. |
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 |
|---|---|---|---|
| AD7893BR-2 | ±1/2 LSB relative accuracy (vs. ±1 LSB), 72 dB SNR (vs. 70 dB), same SO-8 package and pinout | Higher precision required in calibration-critical metrology systems | Select AD7893BR-2 when tighter DC accuracy and improved dynamic performance justify cost premium |
| ADS7822U | 12-bit, 200 kSPS, SPI-compatible, but requires separate +2.7 V to +5.25 V analog/digital supplies | Used in mixed-voltage systems where dual-supply flexibility is needed | Choose ADS7822U only if higher speed or independent AVDD/DVDD rails are mandatory; not drop-in compatible |
Compared with AD7893BR-2, AD7893ARZ-2REEL7 trades minor DC/AC performance for lower cost and broader availability; compared with ADS7822U, it offers single-supply simplicity and proven LC2MOS robustness but at lower maximum throughput.
Availability
AD7893ARZ-2REEL7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable data loggers, automated test equipment front-ends, and medical instrumentation signal chains requiring stable component supply across long production lifecycles.
Supply support for AD7893ARZ-2REEL7 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 AD7893ARZ-2REEL7 belongs to the AD7893 family of fast, low-power, serial-output ADCs designed specifically for space-constrained, single-supply data acquisition systems in industrial and instrumentation applications.
FAQ
What is the reference voltage requirement for AD7893ARZ-2REEL7?
The AD7893ARZ-2REEL7 requires an external +2.5 V reference applied to the REF IN pin. The reference input is buffered on-chip with ≤1 µA input current. Using a precision source like the AD780 ensures full-scale accuracy; deviation from +2.5 V directly scales the 0 V to +2.5 V input range and introduces gain error in AD7893ARZ-2REEL7's transfer function.
Does AD7893ARZ-2REEL7 support simultaneous sampling with other ADCs?
No, AD7893ARZ-2REEL7 does not support hardware-based simultaneous sampling. It lacks a dedicated BUSY or EOC output, and conversion is initiated solely by the CONVST rising edge. Synchronization across multiple AD7893ARZ-2REEL7 devices requires externally aligned CONVST signals and careful timing margining to account for propagation delays and acquisition settling.
Can AD7893ARZ-2REEL7 interface directly with an SPI master without level shifting?
Yes, AD7893ARZ-2REEL7 is SPI-compatible in mode 0 (CPOL = 0, CPHA = 0): SCLK idles low, data sampled on falling edge. Its logic thresholds (VIH ≥2.4 V, VIL ≤0.8 V at VDD = 5 V) match standard 5 V-tolerant SPI peripherals. No level shifting is needed when interfacing with 5 V microcontrollers; ensure SCLK rise/fall times <1 ns for reliable timing compliance.
What is the maximum recommended serial clock frequency for AD7893ARZ-2REEL7?
The maximum guaranteed SCLK frequency for AD7893ARZ-2REEL7 is 8.33 MHz, based on timing parameter t2 (SCLK high pulse width ≥60 ns) and t3 (low pulse width ≥30 ns). Operating above this may violate setup/hold margins, causing invalid data reads. At 8.33 MHz, the 16-bit serial read completes in 1.92 µs, enabling 117 kHz maximum throughput when combined with 6 µs conversion and 600 ns acquisition guardband.
Is AD7893ARZ-2REEL7 pin-compatible with other AD7893 variants like AD7893AR-2?
Yes, AD7893ARZ-2REEL7 is pin-compatible with all AD7893-2 variants in SO-8 package, including AD7893AR-2 and AD7893BR-2. The "Z" suffix denotes lead-free/RoHS-compliant construction, and "REEL7" specifies tape-and-reel packaging (1000 pcs), but electrical functionality, pin assignment, and footprint remain identical to AD7893AR-2. No PCB changes are required when substituting.
AD7893ARZ-2REEL7 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-2REEL7 FAQ
1.How can I place an order for AD7893ARZ-2REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893ARZ-2REEL7 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-2REEL7 reliable?
The price and inventory of AD7893ARZ-2REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893ARZ-2REEL7 is usually 5 days.
3.What payment methods are accepted for AD7893ARZ-2REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893ARZ-2REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893ARZ-2REEL7?
AD7893ARZ-2REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893ARZ-2REEL7 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-2REEL7?
For technical support, including AD7893ARZ-2REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893ARZ-2REEL7 requirements.
6.How does Aetrix verify that AD7893ARZ-2REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7893ARZ-2REEL7 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-2REEL7 meets industry standards.
7.What is the process for return or replacement of AD7893ARZ-2REEL7?
All AD7893ARZ-2REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893ARZ-2REEL7, 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-2REEL7 part is unused and in its original packaging.
Return procedure for AD7893ARZ-2REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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