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Analog Devices Inc. AD7893ANZ-5
- Part No.:
- AD7893ANZ-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7893ANZ-5.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,206
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Product details
Overview
AD7893ANZ-5 from Analog Devices is a 12-bit, serial-output successive-approximation ADC with 6 µs conversion time, on-chip track/hold amplifier, and single +5 V supply operation. It supports 0 V to +5 V unipolar input range, straight binary output coding, and delivers 70 dB SNR at 10 kHz input. Used in precision data acquisition systems requiring compact size and low power.
For engineers reviewing the AD7893ANZ-5 datasheet, AD7893ANZ-5 pinout, AD7893ANZ-5 application, or AD7893ANZ-5 equivalent, this page provides verified technical context, real-world timing constraints, analog input interface requirements, and validated alternative options for industrial sensor signal conditioning and embedded measurement designs.
Technical Context
The AD7893ANZ-5 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 scales 0 V to +5 V inputs using internal resistive networks (R1 = R3 = 5 kΩ), delivering 1.22 mV/LSB resolution referenced to +2.5 V.
Timing is strictly controlled by external SCLK (up to 8.33 MHz) and edge-triggered CONVST: conversion initiates on the rising edge, completes in 6 µs, and SDATA outputs 16-bit frames (4 leading zeros + 12-bit straight binary) synchronized to SCLK rising edges, with data valid on falling edges.
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 - defines minimum inter-conversion interval for 117 kHz maximum throughput. |
| Analog Input Range | 0 V to +5 V - requires external +2.5 V reference; input resistance 9 kΩ min. |
| 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 12-bit accuracy. |
| Power Dissipation | 25 mW typical at +5 V - enables battery-powered portable instrumentation. |
| Track/Hold Acquisition | 1.5 µs max - mandates minimum 600 ns delay before next CONVST to avoid settling errors. |
Pinout & Package
AD7893ANZ-5 is housed in an 8-pin plastic DIP (0.3" wide, N-8 package) with through-hole mounting compatibility and standard 0.1" pin spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Accepts buffered +2.5 V ±5% reference; 2 µA max input current; 10 pF max capacitance. |
| 2 - VIN | Analog input channel | 0 V to +5 V unipolar range; high-impedance input stage eliminates dynamic charging currents. |
| 3 - AGND | Analog ground reference | Separate ground return for track/hold, comparator, and DAC; must be isolated from DGND at PCB level. |
| 4 - SCLK | Serial clock input | External clock up to 8.33 MHz; rising edge clocks out data; falling edge validates data; must go low post-read. |
| 5 - SDATA | Serial data output | 16-bit frame (4 zeros + 12-bit MSB-first); three-stated after 16th SCLK falling edge. |
| 6 - DGND | Digital ground reference | Ground return for logic circuitry; separate from AGND to prevent digital noise coupling into analog path. |
| 7 - CONVST | Convert start control | Falling edge resets serial counter; rising edge triggers track→hold transition and starts conversion. |
| 8 - VDD | Positive supply | +5 V ±5%; supplies both analog and digital sections; 9 mA max IDD; 45 mW max power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 12-bit ADC in 8-pin DIP | Eliminates need for dual ±15 V supplies and external track/hold IC, reducing BOM count and board area by >40% vs. discrete solutions. |
| On-chip track/hold amplifier | Enables accurate digitization of full-scale sine waves up to 58 kHz without external components or timing calibration. |
| High-speed serial interface (2-wire) | Reduces microcontroller GPIO usage to only two pins (SCLK + SDATA), compatible with SPI peripherals without mode configuration. |
| LC2MOS process technology | Combines bipolar precision (for ADC linearity) with CMOS logic efficiency (for low 25 mW power), enabling stable performance across –40°C to +85°C. |
| Input range selection per variant | AD7893ANZ-5's fixed 0 V to +5 V range avoids software scaling errors common in programmable-input ADCs, improving system-level accuracy. |
Applications
| Industrial Sensor Signal Conditioning | Portable Data Logger Front-End |
|---|---|
Use Scenario: Digitizing outputs from 4–20 mA transmitters, RTDs, and strain gauges in factory-floor PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor signals at ≤100 kHz sampling rates with minimal external support circuitry. Use Value: 12-bit resolution and 70 dB SNR ensure <±0.025% full-scale measurement accuracy under EMI-prone industrial environments. |
Use Scenario: Battery-powered environmental monitoring units measuring temperature, humidity, and air quality over multi-day deployments. IC Role / Device Role / Timing Role: Low-power ADC interfacing directly to microcontroller SPI port while consuming only 25 mW during active conversion. Use Value: Single +5 V operation and 1.5 µs track/hold acquisition enable rapid wake-up/sleep cycling, extending battery life beyond 6 months. |
| Medical Instrumentation Input Stage | Test & Measurement Equipment Channel |
Use Scenario: Front-end digitization in portable ECG and EEG devices where signal fidelity and size are critical. IC Role / Device Role / Timing Role: High-fidelity analog-to-digital conversion of low-amplitude bio-signals with built-in track/hold eliminating external sample-hold complexity. Use Value: 6 µs conversion time and straight binary output reduce firmware overhead, accelerating real-time waveform processing in resource-constrained MCUs. |
Use Scenario: Channel ADC in benchtop multimeters and oscilloscope auxiliary inputs requiring calibrated DC accuracy and dynamic performance. IC Role / Device Role / Timing Role: Precision measurement engine delivering ±1 LSB relative accuracy and 70 dB SNR for certified metrology-grade readings. Use Value: On-chip reference buffering and 9 kΩ input resistance minimize loading effects on high-impedance probe circuits, preserving signal integrity. |
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 |
|---|---|---|---|
| AD7893ARZ-5 | SOIC-8 package (vs. DIP-8); identical electrical specs, timing, and pinout; θJA = 170°C/W vs. 130°C/W. | Better suited for automated SMT assembly and space-constrained PCB layouts; thermal performance requires careful copper pour design. | Select AD7893ARZ-5 for volume production with reflow soldering; AD7893ANZ-5 remains optimal for prototyping, through-hole boards, and legacy DIP footprints. |
| ADS7822U | 12-bit, 200 kSPS, SPI-compatible, but uses external reference and lacks on-chip track/hold; 3.3 V or 5 V supply; different pinout and timing. | Requires external op-amp buffer and reference; higher max sampling rate but increased component count and layout sensitivity. | Choose ADS7822U only when >117 kSPS throughput is mandatory and board space allows added passive/active components. |
Compared with AD7893ARZ-5, AD7893ANZ-5 offers superior thermal margin in convection-cooled DIP layouts but limits assembly flexibility; versus ADS7822U, it trades raw speed for integration simplicity, eliminating six external components typically needed for track/hold and reference buffering.
Availability
AD7893ANZ-5 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation, medical device front-ends, and test equipment requiring stable component supply with long-term lifecycle assurance.
Supply support for AD7893ANZ-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7893 series was designed specifically for space-constrained, low-power data acquisition systems needing integrated track/hold, serial interface, and single-supply operation - targeting industrial, medical, and portable test applications.
FAQ
What is the reference voltage requirement for AD7893ANZ-5?
The AD7893ANZ-5 requires an external +2.5 V ±5% reference applied to the REF IN pin. The part buffers this reference internally; input current is ≤2 µA, and input capacitance is ≤10 pF. Using the AD780 or AD680 precision references ensures full-specified gain accuracy and minimizes full-scale error drift over temperature.
Does AD7893ANZ-5 support simultaneous sampling with multiple channels?
No, AD7893ANZ-5 is a single-channel ADC with one analog input (VIN). It does not support hardware-triggered simultaneous sampling across multiple inputs. For multi-channel systems, multiple AD7893ANZ-5 units can be synchronized via shared CONVST and SCLK signals, but true simultaneous hold requires external track/hold amplifiers - which the AD7893ANZ-5's integrated track/hold does not support across channels.
What is the maximum recommended SCLK frequency for reliable operation of AD7893ANZ-5?
The AD7893ANZ-5 supports SCLK frequencies up to 8.33 MHz, as confirmed by timing parameter t2 (SCLK high pulse width ≥60 ns) and t3 (SCLK low pulse width ≥30 ns). Operating above this frequency risks violating setup/hold margins, causing invalid data reads or SDATA bus contention. For robust designs, 5–7 MHz is recommended to accommodate PCB trace skew and logic gate delays.
Can AD7893ANZ-5 operate from a 3.3 V supply instead of +5 V?
No, AD7893ANZ-5 is specified only for +5 V ±5% operation (4.75 V to 5.25 V). VDD outside this range violates Absolute Maximum Ratings and causes undefined behavior: below 4.75 V results in incomplete logic transitions and conversion failures; above 5.25 V risks permanent damage per the +7 V absolute max rating. No 3.3 V variant exists in the AD7893 family.
How is the output data formatted on SDATA for AD7893ANZ-5?
AD7893ANZ-5 outputs 16 bits per conversion on SDATA: four leading zeros followed by the 12-bit straight (natural) binary result, MSB first. After the 16th SCLK falling edge, SDATA enters high-impedance (three-state) mode. The first bit clocked out is '0', then '0', '0', '0', followed by DB11 through DB0 - matching the unipolar 0 V to +5 V transfer function defined in Table II of the datasheet.
AD7893ANZ-5 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-5 FAQ
1.How can I place an order for AD7893ANZ-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7893ANZ-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 AD7893ANZ-5 reliable?
The price and inventory of AD7893ANZ-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7893ANZ-5 is usually 5 days.
3.What payment methods are accepted for AD7893ANZ-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7893ANZ-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7893ANZ-5?
AD7893ANZ-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7893ANZ-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 AD7893ANZ-5?
For technical support, including AD7893ANZ-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7893ANZ-5 requirements.
6.How does Aetrix verify that AD7893ANZ-5 is sourced from the original manufacturer or authorized distributors?
All AD7893ANZ-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 AD7893ANZ-5 meets industry standards.
7.What is the process for return or replacement of AD7893ANZ-5?
All AD7893ANZ-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7893ANZ-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 AD7893ANZ-5 part is unused and in its original packaging.
Return procedure for AD7893ANZ-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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