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Analog Devices Inc. AD7893ANZ-2
- Part No.:
- AD7893ANZ-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7893ANZ-2.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
AD7893ANZ-2 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 accepts 0 V to +2.5 V unipolar input range, delivers straight binary output coding, and targets precision data acquisition in space-constrained industrial and portable systems.
For engineers reviewing the AD7893ANZ-2 datasheet, AD7893ANZ-2 pinout, AD7893ANZ-2 application, or AD7893ANZ-2 equivalent, key selection criteria include its 6 µs conversion time, 0 V to +2.5 V input range, 25 mW typical power dissipation, 8-pin mini-DIP package, and high-speed two-wire serial interface timing compliance.
Technical Context
The AD7893ANZ-2 implements a successive-approximation ADC core with an on-chip R-2R ladder DAC and laser-trimmed internal clock oscillator. Its track/hold amplifier acquires signals to ±1/2 LSB accuracy within 1.5 µs and supports full-scale sine wave inputs up to 58 kHz.
Conversion is edge-triggered via CONVST: rising edge initiates hold mode and starts conversion; falling edge resets the serial shift register. Serial data (16-bit frame: 4 leading zeros + 12-bit result) is clocked out on SCLK rising edges and valid on falling edges, with SDATA three-stated after the 16th falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes over full operating range |
| Conversion Time | 6 µs max - enables up to 117 kHz sustained sampling rate |
| Analog Input Range | 0 V to +2.5 V - requires external +2.5 V reference at REF IN pin |
| Output Coding | Straight (natural) binary - simplifies firmware decoding vs. two's complement |
| Power Dissipation | 25 mW typical - supports battery-powered and thermally sensitive designs |
| Signal-to-(Noise+Distortion) | 70 dB min @ 10 kHz - meets precision measurement requirements for DC and low-frequency AC |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and endpoint linearity for calibration-critical applications |
Pinout & Package
AD7893ANZ-2 is housed in an 8-pin plastic mini-DIP (N-8) package, 0.3" wide, with through-hole mounting. Pin 1 is marked by a notch or dot; top view orientation follows standard DIP numbering (1–4 top row left-to-right, 5–8 bottom row right-to-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Accepts buffered +2.5 V ±5% external reference; determines full-scale gain and offset |
| 2 - VIN | Analog input channel | High-impedance node (≤500 nA input current) for 0 V to +2.5 V unipolar signals |
| 3 - AGND | Analog ground reference | Separate ground return for track/hold, comparator, and DAC; must be star-connected to DGND at single point |
| 4 - SCLK | Serial clock input | External clock (up to 8.33 MHz) controlling serial data timing; rising edge clocks data out |
| 5 - SDATA | Serial data output | Three-state CMOS output delivering 16-bit frame (4 zeros + 12-bit result); disabled after 16th falling edge |
| 6 - DGND | Digital ground reference | Ground return for logic circuitry; isolation from AGND reduces digital noise coupling into analog path |
| 7 - CONVST | Convert start input | Falling edge resets serial register; rising edge triggers track→hold transition and conversion initiation |
| 8 - VDD | Positive supply | +5 V ±5% supply powering all analog and digital sections; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold amplifier | Enables accurate digitization of full-scale 10 kHz sine waves without external components |
| Single-supply +5 V operation | Eliminates need for dual-rail supplies and simplifies power architecture in embedded systems |
| High-speed two-wire serial interface | Reduces microcontroller I/O count and PCB routing complexity versus parallel interfaces |
| LC2MOS process technology | Combines bipolar precision with CMOS low power-enabling 12-bit performance in 8-pin package |
| Input current ≤500 nA | Minimizes loading error on high-impedance sensor sources such as thermocouples or potentiometers |
Applications
| Industrial Process Monitoring | Portable Data Loggers |
|---|---|
Use Scenario: Continuous voltage monitoring of 4–20 mA loop transmitters conditioned to 0–2.5 V output range. IC Role / Device Role / Timing Role: Precision ADC capturing sensor outputs at 10–100 Hz with minimal board area and power budget. Use Value: 12-bit resolution and ±1 LSB linearity ensure <0.025% full-scale accuracy for calibration-grade measurements. | Use Scenario: Battery-operated environmental sensor node measuring temperature, humidity, and pressure with analog outputs. IC Role / Device Role / Timing Role: Low-power, single-supply ADC interfacing directly to op-amp signal conditioning stages. Use Value: 25 mW typical dissipation extends battery life; 6 µs conversion allows rapid wake-up/sleep cycling. |
| Medical Instrumentation Front-End | Test & Measurement Equipment |
Use Scenario: Digitizing ECG or EEG biopotential signals amplified to 0–2.5 V range using instrumentation amplifiers. IC Role / Device Role / Timing Role: High-fidelity analog front-end ADC with low input current and excellent SNR. Use Value: 70 dB SNR and ≤500 nA input current preserve signal integrity from high-impedance electrodes. | Use Scenario: Modular benchtop instrument module acquiring calibrated voltage references and sensor outputs. IC Role / Device Role / Timing Role: Compact, repeatable ADC subsystem for OEM test equipment requiring traceable performance. Use Value: Factory-laser-trimmed internal clock and guaranteed no-missing-codes behavior support metrology-grade repeatability. |
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-2 | SOIC-8 package; identical electrical specs and timing; same 0 V to +2.5 V input range and straight binary coding | Suitable for surface-mount production; requires reflow-compatible layout and thermal management | Select AD7893AR-2 when automated assembly and smaller footprint are prioritized over through-hole serviceability |
| ADS7822U | 12-bit, 200 kSPS, SPI-compatible interface; 2.7–5.25 V supply; 0–VREF input range; no integrated track/hold | Requires external track/hold for >10 kHz signals; higher throughput but less integrated signal chain | Select ADS7822U when higher sample rate and SPI compatibility outweigh need for on-chip track/hold and DIP packaging |
Compared with AD7893AR-2, AD7893ANZ-2 offers through-hole mounting and legacy-compatible DIP layout; compared with ADS7822U, it integrates track/hold and uses simpler two-wire timing but trades off maximum throughput and supply flexibility.
Availability
AD7893ANZ-2 is available at Aetrix Electronics and suitable for industrial process monitoring, portable data loggers, medical instrumentation front-end, and test & measurement equipment requiring stable component supply across long-lifecycle programs.
Supply support for AD7893ANZ-2 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 family was designed as a space-optimized, low-power, single-supply solution for precision data acquisition in resource-constrained embedded systems-emphasizing integration, ease of interface, and robust dc/dc performance.
FAQ
What is the input voltage range supported by the AD7893ANZ-2?
The AD7893ANZ-2 supports a unipolar analog input range of 0 V to +2.5 V. This range requires an external +2.5 V reference applied to the REF IN pin. The device does not support bipolar or wider ranges like ±10 V or 0–5 V-those are handled by other variants (e.g., AD7893-10 or AD7893-5). Input current is limited to ≤500 nA, making it compatible with high-impedance sources.
Does the AD7893ANZ-2 include an integrated track/hold amplifier?
Yes, the AD7893ANZ-2 includes a fully integrated track/hold amplifier optimized for 12-bit accuracy. It acquires input signals to within ±1/2 LSB in ≤1.5 µs and supports full-scale sine wave inputs up to 58 kHz. The track/hold transitions automatically from track to hold on the rising edge of CONVST, eliminating the need for external components in most precision acquisition applications.
What type of output coding does the AD7893ANZ-2 use?
The AD7893ANZ-2 uses straight (natural) binary output coding-not two's complement. Its 12-bit conversion result is transmitted as the lower 12 bits of a 16-bit serial frame, preceded by four leading zeros. This simplifies firmware interpretation in microcontrollers without sign-extension logic, especially in unipolar measurement contexts where negative values are not expected.
What is the maximum serial clock frequency supported by the AD7893ANZ-2?
The AD7893ANZ-2 supports a maximum serial clock (SCLK) frequency of 8.33 MHz. At this rate, the full 16-bit read cycle completes in 1.92 µs. Timing specifications require minimum high/low pulse widths (t₂/t₃ ≥ 60/30 ns) and define data validity relative to SCLK falling edges. Exceeding 8.33 MHz risks setup/hold violations and invalid data capture.
Is the AD7893ANZ-2 pin-compatible with other AD7893 variants?
Yes, all AD7893 variants-including AD7893ANZ-2, AD7893AN-2, AD7893BN-2, and AD7893AR-2-share identical pinout and package footprint (8-pin DIP or SOIC). Electrical differences (e.g., ±1/2 LSB vs. ±1 LSB linearity, SNR of 72 dB vs. 70 dB) do not affect physical compatibility. However, input range and output coding are fixed per variant: only AD7893-2 parts accept 0–2.5 V and output straight binary.
AD7893ANZ-2 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:
- -
AD7893ANZ-2 FAQ
1.How can I place an order for AD7893ANZ-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893ANZ-2 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 AD7893ANZ-2 reliable?
The price and inventory of AD7893ANZ-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893ANZ-2 is usually 5 days.
3.What payment methods are accepted for AD7893ANZ-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893ANZ-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893ANZ-2?
AD7893ANZ-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893ANZ-2 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 AD7893ANZ-2?
For technical support, including AD7893ANZ-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893ANZ-2 requirements.
6.How does Aetrix verify that AD7893ANZ-2 is sourced from the original manufacturer or authorized distributors?
All AD7893ANZ-2 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 AD7893ANZ-2 meets industry standards.
7.What is the process for return or replacement of AD7893ANZ-2?
All AD7893ANZ-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893ANZ-2, 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 AD7893ANZ-2 part is unused and in its original packaging.
Return procedure for AD7893ANZ-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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