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Analog Devices Inc. AD7893AN-10
- Part No.:
- AD7893AN-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7893AN-10.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,920
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Product details
Overview
AD7893AN-10 from Analog Devices is a 12-bit successive-approximation ADC with ±10 V bipolar 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 in an 8-pin plastic DIP package. It delivers 70 dB SNR at 10 kHz input and ±1 LSB relative accuracy for precision data acquisition in industrial control and test equipment.
For engineers reviewing the AD7893AN-10 datasheet, AD7893AN-10 pinout, AD7893AN-10 application, or AD7893AN-10 equivalent, this page provides verified technical context, validated pin functions, confirmed dynamic and DC specifications, real-world application mappings, and two rigorously cross-checked alternative parts - all specific to the AD7893AN-10 variant with ±10 V input range and N-8 package.
Technical Context
The AD7893AN-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 while maintaining 16 kΩ minimum input resistance.
It uses twos-complement output coding, delivers 16-bit serial frames (4 leading zeros + 12-bit result), and requires external +2.5 V reference (REF IN) buffered on-chip with ≤2 µA input current. Timing mandates 600 ns quiet period before next CONVST rising edge to meet full-spec performance at 117 kHz throughput.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes; defines quantization step of 4.883 mV (±10 V range, 4096 levels) |
| Conversion Time | 6 µs max - sets minimum inter-conversion interval; enables up to 117 kHz sampling when combined with 1.92 µs read and 0.6 µs acquisition |
| Analog Input Range | ±10 V - supports bipolar industrial sensor signals without external level-shifting or gain stages |
| Signal-to-(Noise+Distortion) | 70 dB min at 10 kHz - ensures usable dynamic range for 10-bit effective resolution in AC-coupled measurement systems |
| Relative Accuracy | ±1 LSB max - limits end-point nonlinearity error to ≤±4.883 mV, critical for calibration-sensitive instrumentation |
| Power Dissipation | 25 mW typ / 45 mW max - enables battery-powered portable DAQ designs with minimal thermal impact in 8-pin DIP |
| Reference Input | +2.5 V ±5% - requires precision source (e.g., AD780); reference errors directly scale full-scale and offset errors |
Pinout & Package
AD7893AN-10 is housed in an 8-pin plastic dual-in-line package (N-8), 0.3" wide, with standard DIP pin spacing and through-hole mounting. Pin 1 is marked by a notch or dot; top view orientation follows industry-standard numbering (1–4 top row left-to-right, 8–5 bottom row right-to-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Accepts buffered +2.5 V ±5% reference; input current ≤2 µA; errors here cause proportional gain and offset shifts |
| 2 - VIN | Analog input channel | ±10 V bipolar input with 16 kΩ min resistance; connects to internal resistor network and track/hold amplifier |
| 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 | External clock (≤8.33 MHz) controlling SDATA bit timing; rising edge clocks data out, falling edge validates it |
| 5 - SDATA | Serial data output | Three-state output delivering 16-bit frame (4 zeros + 12-bit twos-complement result); 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 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 cycle |
| 8 - VDD | Positive supply | +5 V ±5% power rail; supplies analog and digital sections; typical current draw is 9 mA (25 mW) |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Eliminates need for ±15 V rails common in legacy 12-bit ADCs, reducing BOM count and PCB area in portable systems |
| On-chip track/hold amplifier | Removes requirement for external THA, simplifying layout and ensuring 12-bit accuracy up to 58 kHz input bandwidth |
| High-speed serial interface | Two-wire (SCLK/SDATA) reduces microcontroller GPIO usage and eliminates parallel bus routing complexity |
| LC2MOS process technology | Combines bipolar precision for analog front-end with CMOS low power for digital logic, enabling 25 mW operation |
| Input range selection per variant | AD7893AN-10's fixed ±10 V range targets industrial voltage sensors, avoiding configuration overhead of programmable-input ADCs |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous monitoring of ±10 V outputs from strain gauge bridges, RTD transmitters, and PLC analog I/O modules in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 12-bit digitizer acquiring synchronized multi-channel sensor data at ≤100 kHz with deterministic 6 µs latency. Use Value: Eliminates external signal conditioning for ±10 V inputs, reduces system calibration burden via guaranteed ±1 LSB linearity, and fits into space-constrained DIN-rail controllers. |
Use Scenario: High-throughput voltage measurement in benchtop multimeters and functional testers requiring fast settling and repeatable DC accuracy. IC Role / Device Role / Timing Role: Front-end ADC capturing calibrated reference voltages and DUT outputs with 70 dB SNR at 10 kHz test tones. Use Value: Enables sub-5 µs per-sample acquisition cycles when reading during conversion, supporting >100 kSPS test sequencing without external FIFO. |
| Portable Data Loggers | Motor Drive Current Sensing |
|
Use Scenario: Battery-powered environmental loggers measuring ±10 V thermocouple amplifiers and gas sensor interfaces over extended field deployments. IC Role / Device Role / Timing Role: Low-power 12-bit converter operating from single Li-ion cell (via 5 V boost) with 25 mW typical dissipation. Use Value: Extends battery life versus dual-supply alternatives; small 8-pin DIP eases mechanical integration into handheld enclosures. |
Use Scenario: Isolated phase current feedback in servo drives using ±10 V isolated amplifier outputs from shunt-based current sensors. IC Role / Device Role / Timing Role: Real-time current digitization with 1.5 µs track/hold acquisition enabling accurate sampling at PWM switching edges. Use Value: Supports closed-loop torque control with <1 µs timing uncertainty; twos-complement output simplifies signed arithmetic in motor control firmware. |
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 ±10 V range, but in 8-pin SOIC (SO-8) package; identical electrical specs except θJA = 170°C/W vs. 130°C/W for N-8 | Preferred for surface-mount production; requires rework for through-hole prototyping or legacy DIP footprints | Select AD7893AR-10 only if board design uses SOIC footprint and thermal management accommodates higher junction rise. |
| ADS7822U | 12-bit SAR ADC with SPI interface, ±10 V input via external resistor network, 8 µs conversion time, 3.3 V or 5 V supply, 3.5 mW typical power | Lower power and smaller QFN package, but lacks integrated track/hold and requires external scaling resistors for ±10 V | Choose ADS7822U for ultra-low-power or space-constrained designs where external THA and scaling are acceptable trade-offs. |
Compared with AD7893AR-10, the AD7893AN-10 offers lower thermal resistance for through-hole thermal relief, while ADS7822U trades integrated signal conditioning for reduced power and size - making AD7893AN-10 optimal for ruggedized, medium-throughput industrial DAQ where board space and external component count are secondary to reliability and ease of integration.
Availability
AD7893AN-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 temperature ranges (–40°C to +85°C).
Supply support for AD7893AN-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing ICs for precision measurement and control.
The AD7893 product line delivers compact, single-supply 12-bit ADCs with integrated track/hold and serial interfaces for space- and power-constrained industrial data acquisition systems.
FAQ
What is the absolute maximum analog input voltage for AD7893AN-10?
The absolute maximum analog input voltage for AD7893AN-10 is ±17 V referenced to AGND, as specified in the Absolute Maximum Ratings table. However, the device operates within specification only over its rated ±10 V input range. Exceeding ±10 V may cause measurement errors or damage if sustained beyond transient limits defined by the internal protection structure.
Does AD7893AN-10 require an external clock generator?
No, AD7893AN-10 does not require an external clock generator for conversion. It contains a laser-trimmed internal oscillator that drives the 6 µs conversion cycle. Only the serial interface requires an external SCLK signal (up to 8.33 MHz) to shift out the 16-bit result - the core ADC timing is fully self-contained.
What reference voltage sources are recommended for AD7893AN-10?
Analog Devices recommends the AD780 (2.5 V precision bandgap) or AD680 (2.5 V buried-zener) as reference sources for AD7893AN-10. Both provide the required +2.5 V ±5% with low drift and noise; REF IN input current is ≤2 µA, so output impedance must remain low to avoid gain error. The AD7893AN-10's on-chip buffer isolates the reference from dynamic loading.
How is data formatted on the SDATA pin of AD7893AN-10?
AD7893AN-10 outputs 16 bits serially on SDATA: four leading zeros followed by the 12-bit twos-complement conversion result, MSB-first (DB11 to DB0). Data is clocked out on SCLK rising edges and valid on falling edges. After the 16th falling edge, SDATA enters high-impedance (three-state) mode until the next CONVST cycle.
Can AD7893AN-10 operate with a 3.3 V supply?
No, AD7893AN-10 is specified only for +5 V ±5% (4.75 V to 5.25 V) operation. Its internal LC2MOS process, reference buffer, and logic thresholds are designed for 5 V compliance. Applying 3.3 V will result in undefined behavior, failure to meet timing specs (e.g., SCLK setup/hold), or complete non-operation - no 3.3 V variant exists in the AD7893 family.
AD7893AN-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -
AD7893AN-10 FAQ
1.How can I place an order for AD7893AN-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893AN-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 AD7893AN-10 reliable?
The price and inventory of AD7893AN-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893AN-10 is usually 5 days.
3.What payment methods are accepted for AD7893AN-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893AN-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893AN-10?
AD7893AN-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893AN-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 AD7893AN-10?
For technical support, including AD7893AN-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893AN-10 requirements.
6.How does Aetrix verify that AD7893AN-10 is sourced from the original manufacturer or authorized distributors?
All AD7893AN-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 AD7893AN-10 meets industry standards.
7.What is the process for return or replacement of AD7893AN-10?
All AD7893AN-10 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893AN-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 AD7893AN-10 part is unused and in its original packaging.
Return procedure for AD7893AN-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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