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Analog Devices Inc. AD7893BNZ-5
- Part No.:
- AD7893BNZ-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7893BNZ-5.pdf
- Description:
- IC ADC 12BIT SRL T/H LP 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:542
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Product details
Overview
AD7893BNZ-5 from Analog Devices is a 12-bit, serial-output analog-to-digital converter with 6 µs conversion time, single +5 V supply operation, and 0 V to +5 V unipolar input range. 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 requiring compact, low-power ADCs.
For engineers reviewing the AD7893BNZ-5 datasheet, AD7893BNZ-5 pinout, AD7893BNZ-5 application, or AD7893BNZ-5 equivalent, key selection criteria include its straight-binary output coding, 1.5 µs track/hold acquisition time, ±1 LSB relative accuracy, 70 dB SNR at 10 kHz, and compatibility with microcontroller serial interfaces without external timing components.
Technical Context
The AD7893BNZ-5 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 optimized for 0 V to +5 V input range and a buffered reference input accepting +2.5 V ±5%.
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 MSB-first straight-binary data bits, with SDATA three-stated after the 16th falling SCLK edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes across full operating range |
| Conversion Time | 6 µs max - enables up to 117 kHz sampling rate with proper timing margins |
| Analog Input Range | 0 V to +5 V - unipolar range compatible with standard +2.5 V reference and industrial sensor outputs |
| Output Coding | Straight (natural) binary - simplifies firmware decoding vs. two's complement |
| Signal-to-(Noise+Distortion) | 70 dB min at fIN = 10 kHz - meets precision measurement requirements for DC-coupled instrumentation |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and ≤0.024% full-scale linearity error |
| Power Dissipation | 25 mW typical - supports battery-powered or thermally constrained embedded designs |
Pinout & Package
AD7893BNZ-5 is housed in an 8-pin plastic DIP (0.3" wide, N-8 package) with through-hole mounting and industry-standard pin spacing. Pin functions are electrically isolated between analog (AGND, REF IN, VIN) and digital (DGND, SCLK, SDATA, CONVST) domains, requiring separate ground routing for optimal noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Reference Voltage Input | Accepts buffered +2.5 V ±5% reference; input current ≤2 µA ensures minimal loading on precision references like AD780 |
| 2 - VIN | Analog Input Channel | 0 V to +5 V unipolar input with 9 kΩ minimum input resistance; benign input stage eliminates dynamic charging currents |
| 3 - AGND | Analog Ground Reference | Return path for track/hold, comparator, and DAC; must be routed separately from DGND to avoid digital noise coupling |
| 4 - SCLK | Serial Clock Input | External clock up to 8.33 MHz; rising edge clocks out data, falling edge validates data; requires low-to-high transition timing per t2/t3 |
| 5 - SDATA | Serial Data Output | Three-state CMOS output delivering 16-bit frame (4 zeros + 12-bit straight-binary); disabled after 16th falling SCLK edge |
| 6 - DGND | Digital Ground Reference | Return path for logic circuitry; must connect to system digital ground plane with low-inductance path |
| 7 - CONVST | Convert Start Input | Falling edge resets serial counter; rising edge initiates track-to-hold transition and starts 6 µs conversion cycle |
| 8 - VDD | Positive Supply | +5 V ±5% supply; powers both analog and digital sections; IDD ≤9 mA ensures stable operation under full load |
Key Features
| Feature | Design Value |
|---|---|
| On-chip track/hold amplifier | Acquires input to 12-bit accuracy in ≤1.5 µs, enabling accurate digitization of fast-changing signals without external components |
| Internal clock generator | Laser-trimmed oscillator eliminates need for external crystal or clock source, reducing BOM count and layout complexity |
| Two-wire serial interface | Requires only SCLK and SDATA lines - directly interfaces with SPI peripherals and shift registers without glue logic |
| LC2MOS process technology | Combines precision bipolar analog circuits with low-power CMOS logic, achieving 25 mW typical power at full performance |
| Input voltage range selection | Dedicated resistor network for 0 V to +5 V range ensures optimal gain and offset matching without external scaling |
Applications
| Industrial Process Monitoring | Portable Data Loggers |
|---|---|
Use Scenario: Continuous monitoring of 4–20 mA loop sensors converted to voltage via precision shunt resistors in PLC I/O modules. IC Role / Device Role / Timing Role: ADC front-end converting conditioned 0–5 V sensor outputs into 12-bit digital values synchronized to host controller serial reads. Use Value: 70 dB SNR and ±1 LSB linearity ensure <0.025% measurement uncertainty over temperature, meeting SIL-2 functional safety margin requirements. | Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 100 Hz intervals over multi-day deployments. IC Role / Device Role / Timing Role: Low-power ADC acquiring analog sensor outputs and transferring data via minimal-pin-count serial interface to ultra-low-power MCU. Use Value: 25 mW typical power and single +5 V supply eliminate need for voltage regulators or level shifters, extending battery life by >30% vs. comparable 12-bit ADCs. |
| Test & Measurement Equipment | Motor Control Feedback Systems |
Use Scenario: Digitizing analog waveforms in handheld oscilloscopes and multimeters where board space and thermal dissipation are constrained. IC Role / Device Role / Timing Role: High-speed sampling ADC capturing transient events with 6 µs conversion time and deterministic serial readout timing. Use Value: 117 kHz maximum throughput and 1.5 µs track/hold acquisition enable accurate reconstruction of 50 kHz sine waves per Nyquist criterion. | Use Scenario: Sampling current-sense amplifier outputs in closed-loop servo drives to compute real-time torque and position corrections. IC Role / Device Role / Timing Role: Precision ADC feeding motor control DSP with synchronized 12-bit current feedback data via dedicated SCLK/SDATA lines. Use Value: Straight-binary output coding reduces firmware overhead by eliminating sign-extension and two's complement conversion in real-time control loops. |
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-5 | Same electrical specs and pinout; SOIC-8 package instead of PDIP; θJA = 170°C/W vs. 130°C/W | Surface-mount assembly required; better thermal performance in forced-air environments | Select for automated PCB assembly and space-constrained layouts where reflow compatibility is mandatory |
| ADS7822U | 12-bit, 200 kSPS, SPI-compatible, but requires external reference and separate power supplies for analog/digital sections | No integrated track/hold; higher power (3.3 mW @ 50 kSPS); different serial framing (no leading zeros) | Choose when higher speed or lower power at reduced sample rates is prioritized over integration and simplicity |
Compared with AD7893BR-5, AD7893BNZ-5 offers identical analog performance in a through-hole package ideal for prototyping and legacy systems; versus ADS7822U, it delivers superior system-level integration with on-chip track/hold, internal clock, and unified +5 V supply - reducing component count and layout risk.
Availability
AD7893BNZ-5 is available at Aetrix Electronics and suitable for industrial process monitoring, portable data loggers, test equipment, and motor control feedback systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7893BNZ-5 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7893 product line delivers compact, single-supply 12-bit ADCs with integrated track/hold and serial interface for space- and power-sensitive data acquisition applications where system integration and reliability are critical.
FAQ
What is the reference voltage requirement for AD7893BNZ-5?
The AD7893BNZ-5 requires a +2.5 V ±5% external reference applied to the REF IN pin. The reference input is buffered on-chip with ≤2 µA input current, making it compatible with precision references such as the AD780. Reference accuracy directly impacts full-scale error, so a low-drift, low-noise source is recommended for metrology-grade applications using the AD7893BNZ-5.
Does AD7893BNZ-5 support bipolar input ranges?
No, AD7893BNZ-5 is configured exclusively for unipolar 0 V to +5 V analog input. It uses straight-binary output coding and internal resistor scaling optimized for this range. For bipolar operation, select AD7893-10 (±10 V) or AD7893-3 (±2.5 V), which use two's complement coding and different input networks - the AD7893BNZ-5 pinout and transfer function are not compatible with bipolar inputs.
How is data read from AD7893BNZ-5?
Data is read via a 16-clock serial sequence on the SCLK and SDATA pins: four leading zeros followed by 12 MSB-first straight-binary bits representing the conversion result. The SDATA line is three-stated after the 16th falling SCLK edge. Reading must avoid the 6 µs conversion window and the 600 ns prior to the next CONVST rising edge to meet AD7893BNZ-5 AC specifications.
What is the track/hold acquisition time for AD7893BNZ-5?
The AD7893BNZ-5 has a track/hold acquisition time of ≤1.5 µs - the time required for the amplifier output to settle within ±1/2 LSB after returning to track mode at the end of conversion or after a step change at VIN. This parameter defines the minimum interval before initiating the next conversion to maintain specified linearity and SNR performance in the AD7893BNZ-5.
Can AD7893BNZ-5 operate from supplies other than +5 V?
No, AD7893BNZ-5 is specified only for +5 V ±5% operation (4.75 V to 5.25 V). Absolute maximum ratings allow VDD up to +7 V, but electrical performance - including conversion time, SNR, and linearity - is guaranteed solely within the +5 V ±5% range. Operating outside this window may cause undefined behavior or permanent damage, and is not supported for AD7893BNZ-5.
AD7893BNZ-5 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:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7893BNZ-5 FAQ
1.How can I place an order for AD7893BNZ-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893BNZ-5 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 AD7893BNZ-5 reliable?
The price and inventory of AD7893BNZ-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893BNZ-5 is usually 5 days.
3.What payment methods are accepted for AD7893BNZ-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893BNZ-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893BNZ-5?
AD7893BNZ-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893BNZ-5 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 AD7893BNZ-5?
For technical support, including AD7893BNZ-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893BNZ-5 requirements.
6.How does Aetrix verify that AD7893BNZ-5 is sourced from the original manufacturer or authorized distributors?
All AD7893BNZ-5 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 AD7893BNZ-5 meets industry standards.
7.What is the process for return or replacement of AD7893BNZ-5?
All AD7893BNZ-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893BNZ-5, 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 AD7893BNZ-5 part is unused and in its original packaging.
Return procedure for AD7893BNZ-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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