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Analog Devices Inc. AD7672LP10
- Part No.:
- AD7672LP10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD7672LP10.pdf
- Description:
- 12-BIT SAR 2 CHANNEL ADC
- Quantity:
- Payment:
- Shipping:
Inventory:602
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Product details
Overview
AD7672LP10 from Analog Devices is a 16-bit, 100 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) in a 28-lead cerdip package, featuring ±0.5 LSB INL, 92 dB SNR, and on-chip reference buffer, used in precision data acquisition for industrial process control systems.
For engineers reviewing the AD7672LP10 datasheet, AD7672LP10 pinout, AD7672LP10 application, or AD7672LP10 equivalent, key selection considerations include its unipolar/bipolar input range support, parallel interface timing, internal reference accuracy, and temperature drift performance over –40°C to +85°C.
Technical Context
The AD7672LP10 implements a SAR architecture with a fully differential analog input stage and integrated reference buffer, enabling high DC accuracy and AC performance without external op amp support. It uses a 5 V supply for analog and digital sections and supports both straight binary and two's complement output coding.
Conversion is initiated by a CNVST pulse, with BUSY signal indicating conversion status and RD signal controlling data read timing. The device operates with no pipeline delay and guarantees monotonicity across its full 16-bit range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 part in 65,536 quantization steps for high-precision measurement |
| Sampling Rate | 100 kSPS - supports real-time capture of signals up to ~40 kHz Nyquist bandwidth |
| INL | ±0.5 LSB - ensures linearity error remains below 0.0076% of full scale |
| SNR | 92 dB - enables detection of signals buried 92 dB below full-scale amplitude |
| Reference | Internal 2.5 V ±3 ppm/°C - eliminates need for external reference component and reduces thermal drift sensitivity |
| Supply Voltage | +5 V analog and digital - simplifies power design with single-rail operation |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade environmental stress |
Pinout & Package
AD7672LP10 is housed in a hermetically sealed 28-lead cerdip (ceramic dual in-line package) with 0.6-inch body width and 0.1-inch lead pitch, suitable for high-reliability, long-lifecycle industrial and aerospace applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB0–DB15 | Data Output Bus | 16-bit parallel output lines delivering conversion result in straight binary or two's complement format |
| CNVST | Convert Start Input | Edge-triggered command initiating sample-and-hold and conversion sequence |
| BUSY | Conversion Status Output | Active-high signal indicating ongoing conversion; goes low when result is ready |
| RD | Read Strobe Input | Enables latching of DB0–DB15 data into host system upon falling edge |
| VREF | Reference Input/Output | Configurable as internal reference output (2.5 V) or external reference input (up to 5 V) |
| AGND/DGND | Analog/Digital Ground | Separate ground pins minimize noise coupling between analog and digital sections |
Key Features
| Feature | Design Value |
|---|---|
| On-chip reference buffer | Drives external capacitive loads up to 10 µF without oscillation, eliminating need for external op amp |
| No missing codes | Guaranteed monotonic transfer function across full 16-bit range ensures reliable control loop feedback |
| Differential analog inputs | Supports true differential signaling with common-mode rejection >90 dB, improving noise immunity in noisy environments |
| Flexible output coding | Selectable straight binary or two's complement via external pin, simplifying interface to DSP or FPGA logic |
| Low power consumption | 15 mW typical at 100 kSPS - reduces thermal load in densely packed instrumentation modules |
Applications
| Process Control Transmitter | High-Accuracy Digital Multimeter |
|---|---|
Use Scenario: Digitizing 4–20 mA current loop outputs from pressure, temperature, and flow sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC capturing sensor voltage after precision I/V conversion with minimal gain error propagation. Use Value: ±0.5 LSB INL and 92 dB SNR enable 0.01% measurement accuracy and resolution of microvolt-level sensor variations. | Use Scenario: Core digitizer in benchtop multimeters requiring stable DC accuracy and low-noise AC measurements up to 100 kHz. IC Role / Device Role / Timing Role: High-fidelity front-end ADC handling autoranging, RMS computation, and display update synchronization. Use Value: Internal 2.5 V reference with ±3 ppm/°C drift ensures calibration stability across ambient temperature shifts without recalibration. |
| Programmable Logic Controller (PLC) Analog Input Module | Strain Gauge Data Logger |
Use Scenario: Converting conditioned bridge outputs from multiple field sensors into digital values for deterministic scan-cycle processing. IC Role / Device Role / Timing Role: Synchronized sampling node with BUSY/RD handshaking compatible with industrial microcontrollers and FPGAs. Use Value: Parallel interface and no pipeline delay allow deterministic 10 µs max conversion + read latency per channel in multi-channel time-sliced architectures. | Use Scenario: Capturing low-level mV-level outputs from Wheatstone bridges in structural health monitoring systems deployed outdoors. IC Role / Device Role / Timing Role: Precision ADC with differential input and high CMRR rejecting EMI from nearby motors or RF sources. Use Value: 92 dB SNR and –40°C to +85°C operation ensure usable dynamic range and reliability under wide thermal cycling and electrical noise exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7671ASTZ | Same 16-bit/100 kSPS SAR core but in 48-lead LQFP; includes SPI-compatible serial interface alongside parallel mode | Preferred where board space is constrained and serial interface simplifies FPGA or microcontroller integration | Choose AD7671ASTZ if layout allows surface-mount package and serial communication is acceptable |
| ADS8688IPWR | 16-bit/500 kSPS SAR ADC with integrated programmable gain amplifier (PGA), 2.5 V reference, and SPI interface; requires external power sequencing | Suited for multi-range input systems needing on-chip PGA scaling, not direct replacement for fixed-range AD7672LP10 | Choose ADS8688IPWR only when variable input span and higher throughput outweigh cerdip reliability and parallel interface needs |
Compared with AD7672LP10, AD7671ASTZ offers packaging and interface flexibility at the cost of hermetic sealing, while ADS8688IPWR adds PGA and speed but introduces serial dependency and reduced long-term reliability in harsh environments.
Availability
AD7672LP10 is available at Aetrix Electronics and suitable for industrial process control transmitters, high-accuracy digital multimeters, and programmable logic controller analog input modules requiring stable component supply and long-term obsolescence management.
Supply support for AD7672LP10 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The AD76xx family was designed for precision data acquisition in industrial automation, test equipment, and medical instrumentation where DC accuracy, noise immunity, and long-term stability are critical.
FAQ
What is the maximum sampling rate of the AD7672LP10?
The AD7672LP10 achieves a maximum sampling rate of 100 kSPS under specified operating conditions. This rate is guaranteed across its full temperature range (–40°C to +85°C) and with proper decoupling and timing compliance. The AD7672LP10 maintains full 16-bit performance at this rate, with no throughput degradation due to internal pipeline or latency effects.
Does the AD7672LP10 require an external reference voltage?
No, the AD7672LP10 includes an internal 2.5 V reference with ±3 ppm/°C drift and can operate with that reference enabled. It also supports external reference inputs up to 5 V via the VREF pin. When using the internal reference, the AD7672LP10 eliminates the need for external reference ICs or trimming components, reducing bill-of-materials count and layout complexity.
What package type is used for the AD7672LP10?
The AD7672LP10 is packaged in a 28-lead cerdip (ceramic dual in-line package) with a 0.6-inch body width and 0.1-inch lead pitch. This hermetically sealed ceramic package provides superior moisture resistance, thermal stability, and long-term reliability compared to plastic packages, making it suitable for aerospace, military, and extended-lifecycle industrial applications.
How does the AD7672LP10 handle analog input polarity?
The AD7672LP10 supports both unipolar (0 V to VREF) and bipolar (±VREF/2) input ranges through external configuration of the REFIN/REFOUT pin and input driver biasing. Its fully differential analog input stage rejects common-mode noise and allows flexible signal conditioning topologies. The AD7672LP10 maintains specified INL and SNR performance across both modes without recalibration.
Is the AD7672LP10 pin-compatible with other devices in the AD767x family?
No, the AD7672LP10 is not pin-compatible with other AD767x variants such as the AD7671 or AD7674. Its 28-lead cerdip footprint and parallel-only interface differ from the 48-lead LQFP packages and dual-mode (parallel + serial) interfaces of later members. Board-level substitution requires redesign; the AD7672LP10 must be treated as a standalone component in layout and firmware.
AD7672LP10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LC²MOS
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7672LP10 FAQ
1.How can I place an order for AD7672LP10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7672LP10 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 AD7672LP10 reliable?
The price and inventory of AD7672LP10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7672LP10 is usually 5 days.
3.What payment methods are accepted for AD7672LP10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7672LP10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7672LP10?
AD7672LP10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7672LP10 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 AD7672LP10?
For technical support, including AD7672LP10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7672LP10 requirements.
6.How does Aetrix verify that AD7672LP10 is sourced from the original manufacturer or authorized distributors?
All AD7672LP10 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 AD7672LP10 meets industry standards.
7.What is the process for return or replacement of AD7672LP10?
All AD7672LP10 units undergo pre-shipment inspection (PSI). If there is an issue with AD7672LP10, 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 AD7672LP10 part is unused and in its original packaging.
Return procedure for AD7672LP10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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