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Analog Devices Inc. AD7893ARZ-10
- Part No.:
- AD7893ARZ-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7893ARZ-10.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
AD7893ARZ-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 is used in precision data acquisition systems requiring fast, low-power digitization of bipolar industrial sensor signals.
For engineers reviewing the AD7893ARZ-10 datasheet, AD7893ARZ-10 pinout, AD7893ARZ-10 application, or AD7893ARZ-10 equivalent, this page delivers verified technical context, real-world timing constraints, confirmed SOIC-8 package mapping, validated serial interface behavior, and direct alternative part comparisons for embedded instrumentation and test equipment design.
Technical Context
The AD7893ARZ-10 implements a laser-trimmed internal clock driving a 12-bit R-2R ladder SAR core, with integrated track/hold that acquires to ±1/2 LSB in ≤1.5 µs. Its analog front-end includes signal scaling resistors (R1=30 kΩ, R2=7.5 kΩ, R3=10 kΩ) enabling ±10 V input compliance while maintaining 16 kΩ minimum input resistance.
Conversion is edge-triggered via CONVST: rising edge initiates hold mode and starts conversion; falling edge resets the serial output shift register. Serial data output (SDATA) delivers 16-bit frames-four leading zeros followed by 12-bit twos-complement code-with data valid on SCLK falling edges and output tristated after the 16th falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes; defines quantization step size of 4.883 mV (±10 V range, REF IN = +2.5 V) |
| Conversion Time | 6 µs max - sets minimum throughput interval; enables up to 117 kHz sampling when combined with 1.92 µs read time and 600 ns acquisition guard band |
| Analog Input Range | ±10 V - supports bipolar industrial transducers (e.g., strain gauges, accelerometers) without external level-shifting circuitry |
| Reference Input | +2.5 V ±5% - buffered on-chip; reference errors directly contribute to gain and offset errors; compatible with AD780/AD680 references |
| Power Dissipation | 25 mW typical - enables battery-powered portable instrumentation; maximum 45 mW at full load and worst-case temperature |
| Signal-to-(Noise+Distortion) | 70 dB min @ 10 kHz - specifies dynamic fidelity for AC-coupled sensor signals; measured with fSAMPLE = 117 kHz |
| Differential Nonlinearity | ±1 LSB max - ensures monotonicity across full scale; critical for closed-loop control applications where code reversals cause instability |
Pinout & Package
AD7893ARZ-10 is housed in an 8-pin SOIC (SO-8) package with 1.27 mm pitch, 5.0 mm × 6.2 mm body, and standard JEDEC MS-012AC footprint. Pin 1 is marked with a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Buffered +2.5 V reference node; max 1 µA input current; external precision reference required for full accuracy |
| 2 - VIN | Analog input channel | Accepts ±10 V differential input relative to AGND; internal resistor network scales input for 12-bit conversion |
| 3 - AGND | Analog ground reference | Return path for track/hold, comparator, and DAC; must be separated from DGND and connected at single point |
| 4 - SCLK | Serial clock input | External clock up to 8.33 MHz; rising edge clocks data out; falling edge validates SDATA; must go low after read completion |
| 5 - SDATA | Serial data output | Three-state CMOS output; delivers 16-bit frame (4 zeros + 12-bit twos-complement); tristated after 16th SCLK falling edge |
| 6 - DGND | Digital ground reference | Return path for logic circuitry; isolated from AGND to prevent digital noise coupling into analog section |
| 7 - CONVST | Convert start input | Falling edge resets serial shift register; rising edge triggers track→hold transition and starts 6 µs conversion sequence |
| 8 - VDD | Positive supply | +5 V ±5% supply; powers analog and digital sections; decoupling capacitor (0.1 µF ceramic) required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Operates from +5 V only - eliminates need for dual ±15 V supplies common in legacy 12-bit ADCs, reducing BOM count and board area |
| Integrated track/hold amplifier | Acquires to 12-bit accuracy in ≤1.5 µs - removes requirement for external THA, simplifying layout and improving phase matching in multi-channel systems |
| High-speed serial interface | Two-wire (SCLK/SDATA), 16-bit frame - reduces GPIO count vs parallel interfaces; compatible with SPI peripherals using software bit-banging or hardware shift registers |
| On-chip clock generator | Laser-trimmed oscillator - eliminates external crystal or clock source, improving system reliability and reducing startup delay variability |
| Bipolar input support | ±10 V range with twos-complement coding - enables direct connection to industrial sensors with negative excursions (e.g., LVDTs, piezoelectric transducers) |
Applications
| Industrial Process Monitoring | Portable Data Loggers |
|---|---|
|
Use Scenario: Continuous digitization of 4–20 mA loop outputs converted to voltage via precision shunt in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor data at 10–100 kHz rates; CONVST synchronized to system timer; serial read scheduled post-conversion to avoid interference. Use Value: 6 µs conversion time enables >100 kSPS throughput; ±10 V input range accommodates over-range fault detection; SOIC-8 footprint fits dense I/O card layouts. |
Use Scenario: Battery-powered environmental sensor node measuring temperature, pressure, and humidity with microcontroller-based sampling. IC Role / Device Role / Timing Role: Low-power ADC interfaced to MCU GPIOs; CONVST triggered by wake-up interrupt; serial read executed during CPU idle cycles to minimize active time. Use Value: 25 mW typical power extends battery life; single +5 V supply simplifies power architecture; small SOIC-8 package reduces PCB area and weight. |
| Test & Measurement Equipment | Motor Control Feedback Systems |
|
Use Scenario: Digitizing analog waveforms from oscilloscope front-ends or function generator outputs in benchtop instruments. IC Role / Device Role / Timing Role: High-fidelity ADC capturing transient signals; track/hold acquisition time (≤1.5 µs) ensures accurate sampling of fast-rising edges; SCLK driven at 8.33 MHz for minimal read latency. Use Value: 70 dB SNR supports clean spectral analysis; twos-complement output simplifies signed math in FFT engines; no missing codes prevents waveform distortion artifacts. |
Use Scenario: Sampling current-sense amplifier outputs in three-phase inverter drives for real-time torque and flux estimation. IC Role / Device Role / Timing Role: Synchronized ADC in motor control loop; CONVST aligned with PWM dead-time; serial data read during PWM off-time to avoid EMI coupling. Use Value: ±10 V input range handles high-gain current sense signals; 12-bit resolution enables <1% torque ripple control; SOIC-8 allows placement near gate drivers with short analog traces. |
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 |
|---|---|---|---|
| AD7893BRZ-10 | ±1/2 LSB relative accuracy (vs ±1 LSB for AD7893ARZ-10); same SOIC-8 package, timing, and pinout | Required where endpoint linearity error must be minimized in precision calibration systems | Select AD7893BRZ-10 when absolute accuracy at full scale is prioritized over cost; otherwise AD7893ARZ-10 meets most industrial DAQ requirements. |
| ADS7822U | 12-bit SAR ADC with SPI interface, 10 µs conversion time, +2.7 V to +5.25 V supply, no on-chip track/hold | Suitable for lower-speed, single-supply systems where external THA is acceptable and smaller 8-pin TSSOP package is preferred | Choose ADS7822U for designs needing wider supply range or tighter thermal specs (–40°C to +85°C), but verify external THA adds required acquisition performance. |
Compared with AD7893BRZ-10, AD7893ARZ-10 trades 0.5 LSB linearity for lower cost and broader availability; compared with ADS7822U, it delivers faster conversion and integrated track/hold at the expense of fixed +5 V supply and larger SOIC footprint.
Availability
AD7893ARZ-10 is available at Aetrix Electronics and suitable for industrial process monitoring, portable data loggers, test & measurement equipment, and motor control feedback systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7893ARZ-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7893 product line delivers compact, single-supply 12-bit serial ADCs optimized for space-constrained, low-power industrial data acquisition where integration of track/hold, clock, and serial interface in an 8-pin package is essential.
FAQ
What is the exact analog input voltage range supported by the AD7893ARZ-10?
The AD7893ARZ-10 supports a bipolar analog input range of ±10 V referenced to AGND. This is achieved through an internal resistor network (R1=30 kΩ, R2=7.5 kΩ, R3=10 kΩ) and is distinct from other variants like AD7893ARZ-5 (0 V to +5 V) or AD7893ARZ-3 (±2.5 V). The ±10 V range enables direct interfacing with industrial sensors without external scaling.
Does the AD7893ARZ-10 require an external reference voltage, and what are the specifications?
Yes, the AD7893ARZ-10 requires an external +2.5 V reference applied to the REF IN pin. The reference input is buffered on-chip with a maximum input current of 1 µA and operates within a voltage range of +2.375 V to +2.625 V. Reference inaccuracies directly impact gain and offset errors, so precision sources like the AD780 or AD680 are recommended for full accuracy.
How does the serial interface of the AD7893ARZ-10 work, and what is the data format?
The AD7893ARZ-10 uses a two-wire serial interface: SCLK (input) and SDATA (output). It outputs a 16-bit frame - four leading zeros followed by 12 bits of twos-complement conversion data - with the MSB (DB11) first. Data is clocked out on SCLK rising edges and valid on falling edges; SDATA is tristated after the 16th falling edge of SCLK.
What is the role of the CONVST pin on the AD7893ARZ-10, and how should it be driven?
The CONVST pin is an edge-triggered control input: its rising edge initiates the track-to-hold transition and starts the 6 µs conversion sequence, while its falling edge resets the serial output shift register. To ensure reliable operation, CONVST must meet minimum pulse width (50 ns) and be synchronized to avoid read operations during conversion or within 600 ns before the next rising edge.
Is the AD7893ARZ-10 pin-compatible with other variants in the AD7893 family?
Yes, all AD7893 variants-including AD7893ARZ-10, AD7893ARZ-5, AD7893ARZ-3, and AD7893ARZ-2-are fully pin-compatible in the SOIC-8 (SO-8) package. They share identical pin functions, timing characteristics, and electrical interface requirements; only the analog input range, output coding (twos-complement vs. straight binary), and internal resistor network differ between variants.
AD7893ARZ-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7893ARZ-10 FAQ
1.How can I place an order for AD7893ARZ-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893ARZ-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 AD7893ARZ-10 reliable?
The price and inventory of AD7893ARZ-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893ARZ-10 is usually 5 days.
3.What payment methods are accepted for AD7893ARZ-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893ARZ-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893ARZ-10?
AD7893ARZ-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893ARZ-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 AD7893ARZ-10?
For technical support, including AD7893ARZ-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893ARZ-10 requirements.
6.How does Aetrix verify that AD7893ARZ-10 is sourced from the original manufacturer or authorized distributors?
All AD7893ARZ-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 AD7893ARZ-10 meets industry standards.
7.What is the process for return or replacement of AD7893ARZ-10?
All AD7893ARZ-10 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893ARZ-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 AD7893ARZ-10 part is unused and in its original packaging.
Return procedure for AD7893ARZ-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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