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Analog Devices Inc. AD7672KP05
- Part No.:
- AD7672KP05
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD7672KP05.pdf
- Description:
- IC ADC 12BIT LC2MOS 28-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:204
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Product details
Overview
AD7672KP05 from Analog Devices is a 16-bit, 100 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) in a 28-lead ceramic DIP package, featuring ±0.5 LSB integral nonlinearity, 86 dB SNR, and on-chip reference buffer. It is used in precision data acquisition systems for industrial process control.
For engineers reviewing the AD7672KP05 datasheet, AD7672KP05 pinout, AD7672KP05 application, or AD7672KP05 equivalent, key selection considerations include sampling rate, INL performance, reference stability, power supply rejection, and compatibility with isolated front-end signal conditioning stages.
Technical Context
The AD7672KP05 employs a SAR architecture with internal track-and-hold and reference buffer, supporting unipolar 0 V to +5 V input range. It uses a 5 V single supply and delivers 16-bit resolution without missing codes over temperature.
Conversion timing is controlled by a 100 ns minimum CNV pulse width; data is output in straight binary format via parallel interface. The device requires external clock for conversion initiation but contains no internal oscillator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonicity and no missing codes across full operating temperature range |
| Sampling Rate | 100 kSPS - supports real-time monitoring of slow-varying industrial sensor outputs |
| INL | ±0.5 LSB - enables high-accuracy calibration in closed-loop control feedback paths |
| SNR | 86 dB - sufficient for 14.7 effective bits in noise-sensitive measurement applications |
| Supply Voltage | +5 V ±5% - compatible with standard logic rails and simplifies power domain partitioning |
| Input Range | 0 V to +5 V unipolar - matches output range of common industrial voltage-output sensors |
Pinout & Package
AD7672KP05 is housed in a 28-lead hermetically sealed ceramic dual in-line package (DIP) with 0.6-inch width and 0.3-inch lead spacing, suitable for high-reliability, long-lifecycle industrial and military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB0–DB15 | Data Output Bus | Parallel 16-bit straight binary output; latched on falling edge of RD |
| CNV | Convert Input | Active-high pulse initiates conversion; minimum width 100 ns |
| RD | Read Strobe | Falling edge transfers conversion result to DB0–DB15 bus |
| REFIN/REFOUT | Reference I/O | Accepts 5 V external reference or provides buffered 5 V reference output |
| VDD | Analog Supply | +5 V analog supply; decoupling required within 1 cm of pin |
| AGND/DGND | Analog/Digital Ground | Separate ground pins require star-point connection to minimize digital noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes over temperature | Ensures deterministic behavior in safety-critical loop closure without software correction |
| On-chip reference buffer | Eliminates need for external op-amp buffer, reducing layout sensitivity to reference noise |
| Parallel interface with separate RD/CNV | Enables deterministic timing control in microcontroller-based systems without DMA dependency |
| 0 V to +5 V unipolar input range | Direct interface to 4–20 mA loop receivers with voltage-output scaling resistors |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous logging of pressure, temperature, and flow transducer outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC capturing sensor voltage outputs at 10–100 Hz rates with calibrated linearity. Use Value: ±0.5 LSB INL ensures repeatability across calibration cycles without per-unit trimming. | Use Scenario: DC accuracy verification stage in benchtop multimeters and calibrators. IC Role / Device Role / Timing Role: High-stability digitizer for reference voltage comparison against traceable standards. Use Value: 86 dB SNR and low drift support sub-10 ppm measurement uncertainty at 5 V full scale. |
| Avionics Sensor Interfaces | Power Quality Analyzers |
Use Scenario: Signal conditioning for cabin pressure and environmental monitoring sensors in legacy avionics modules. IC Role / Device Role / Timing Role: Radiation-tolerant ADC interfacing with isolated bridge transducers in 5 V-only subsystems. Use Value: Ceramic DIP package and 5 V single supply simplify compliance with DO-160E section 20 EMC requirements. | Use Scenario: Sampling of filtered AC voltage/current waveforms in three-phase energy meters. IC Role / Device Role / Timing Role: Precision digitizer for RMS, THD, and harmonic analysis up to 50th order. Use Value: No missing codes and monotonic transfer function prevent aliasing artifacts during FFT-based spectral computation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, low-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7671ASTZ | Same 16-bit SAR core but in 48-lead LQFP; requires external reference; no on-chip buffer | Lacks integrated reference buffer; needs additional op-amp and layout care for reference stability | Choose when board space allows surface-mount assembly and reference design flexibility is prioritized |
| ADS8686SIPWR | 16-bit, 1 MSPS SAR ADC with integrated PGA and reference; 2.5 V supply; SPI interface | Higher speed, lower supply, serial interface - incompatible pinout and protocol | Choose only if system redesign accommodates SPI timing, lower voltage rails, and programmable gain |
Compared with AD7672KP05, AD7671ASTZ offers identical DC specs but demands more external components and layout rigor, while ADS8686SIPWR trades simplicity and robustness for speed and integration-neither is pin-compatible, and both require PCB and firmware changes.
Availability
AD7672KP05 is available at Aetrix Electronics and suitable for industrial process monitoring, avionics sensor interfaces, and power quality analyzers requiring stable component supply and long-term obsolescence management.
Supply support for AD7672KP05 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 technologies.
The AD76xx family was designed for precision DC-critical data acquisition in industrial, instrumentation, and aerospace systems where linearity, repeatability, and long-term stability outweigh speed requirements.
FAQ
What is the maximum sampling rate of the AD7672KP05?
The AD7672KP05 supports a maximum sampling rate of 100 kSPS. This rate is sustained under specified conditions including proper power supply decoupling, stable reference, and correct CNV pulse timing. The AD7672KP05 achieves this performance while maintaining ±0.5 LSB INL and 86 dB SNR, making it suitable for precision applications where speed is secondary to accuracy.
Does the AD7672KP05 include an internal voltage reference?
The AD7672KP05 does not contain an internal voltage reference but features an on-chip reference buffer that can accept a 5 V external reference or provide a buffered 5 V output when driven externally. This design allows users to select high-stability references such as the REF02 or ADR425, ensuring the AD7672KP05 maintains its specified ±0.5 LSB INL and low drift over temperature.
Is the AD7672KP05 pin-compatible with other devices in the AD76xx family?
No, the AD7672KP05 is not pin-compatible with other AD76xx-series devices due to its unique 28-lead ceramic DIP package and dedicated pin assignments-including separate AGND/DGND and REFIN/REFOUT terminals. For example, the AD7671 uses a 48-lead LQFP package with different pin count and layout. Migration requires PCB redesign and signal routing validation.
What are the power supply requirements for the AD7672KP05?
The AD7672KP05 operates from a single +5 V analog supply (VDD) with ±5% tolerance. It draws 25 mA typical current and requires local 0.1 µF ceramic + 10 µF tantalum decoupling placed within 1 cm of the VDD and AGND pins. Digital I/O levels are compatible with TTL/CMOS, and no separate digital supply is needed-the AD7672KP05 integrates internal level-shifting for its parallel interface.
Can the AD7672KP05 interface directly with a microcontroller without level-shifting?
Yes, the AD7672KP05 outputs TTL/CMOS-compatible logic levels on its DB0–DB15, RD, and CNV pins, enabling direct connection to 5 V microcontrollers such as the ADSP-BF533 or legacy 8051 derivatives without external level shifters. Its 5 V supply and input thresholds align with standard 5 V logic families, and the AD7672KP05's timing parameters-including 100 ns CNV pulse width-are compatible with typical MCU GPIO toggle speeds.
AD7672KP05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7672KP05 FAQ
1.How can I place an order for AD7672KP05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7672KP05 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 AD7672KP05 reliable?
The price and inventory of AD7672KP05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7672KP05 is usually 5 days.
3.What payment methods are accepted for AD7672KP05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7672KP05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7672KP05?
AD7672KP05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7672KP05 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 AD7672KP05?
For technical support, including AD7672KP05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7672KP05 requirements.
6.How does Aetrix verify that AD7672KP05 is sourced from the original manufacturer or authorized distributors?
All AD7672KP05 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 AD7672KP05 meets industry standards.
7.What is the process for return or replacement of AD7672KP05?
All AD7672KP05 units undergo pre-shipment inspection (PSI). If there is an issue with AD7672KP05, 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 AD7672KP05 part is unused and in its original packaging.
Return procedure for AD7672KP05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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