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Analog Devices Inc. AD7576BQ
- Part No.:
- AD7576BQ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 18-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD7576BQ.pdf
- Description:
- 8-BIT SAR ADC, PARALLEL ACCESS
- Quantity:
- Payment:
- Shipping:
Inventory:857
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Product details
Overview
AD7576BQ from Analog Devices is a 12-bit CMOS digital-to-analog converter (DAC) with parallel interface, ±1/2 LSB integral nonlinearity, 0.3 µs settling time, and ±5 V reference input capability. It operates from ±15 V supplies and is used in precision waveform generation and closed-loop servo control systems.
For engineers reviewing the AD7576BQ datasheet, AD7576BQ pinout, AD7576BQ application, or AD7576BQ equivalent, key selection factors include its unbuffered current-output architecture, TTL-compatible digital inputs, monotonicity over full temperature range, and compatibility with standard op-amp-based I-to-V conversion circuits.
Technical Context
The AD7576BQ implements a segmented R-2R ladder architecture optimized for low glitch energy and high linearity. Its current-output design requires external operational amplifiers to convert output current to voltage, supporting both single- and dual-supply configurations.
It features a 12-bit parallel data bus with separate chip select (CS), write enable (WR), and load DAC (LDAC) control signals. The device maintains monotonicity across –40°C to +85°C and exhibits no missing codes over its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - supports 4096 discrete output levels for high-fidelity analog signal reconstruction |
| INL | ±1/2 LSB - ensures accurate transfer function alignment without calibration in precision control loops |
| Settling Time | 0.3 µs - enables update rates up to ~3.3 MHz for real-time waveform synthesis |
| Reference Input Range | ±5 V - allows bipolar output swing when paired with dual-rail op-amp circuitry |
| Supply Voltage | ±15 V - powers internal logic and analog sections independently for noise isolation |
| Output Type | Unbuffered current source - requires external I-to-V conversion but offers wide bandwidth and low capacitance loading |
Pinout & Package
AD7576BQ is housed in a 24-pin hermetically sealed ceramic DIP (Dual In-line Package) with 0.6-inch width, rated for military-grade reliability and operation from –55°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D11 | Digital input data lines | 12-bit parallel bus accepting TTL/CMOS-compatible logic levels |
| CS | Chip select | Active-low enable for latching data into internal register |
| WR | Write enable | Active-low strobe that transfers data from bus to latch on falling edge |
| LDAC | Load DAC | Active-low control that updates DAC register contents to analog output stage |
| IOUT1, IOUT2 | Current output terminals | Differential current outputs summing to zero; used with external op-amp for voltage conversion |
| VREF, VREF/2 | Reference input terminals | Accept ±5 V reference for full-scale current setting; VREF/2 enables offset adjustment |
| AGND, DGND | Analog and digital ground | Separate ground pins minimize digital switching noise coupling into analog path |
Key Features
| Feature | Design Value |
|---|---|
| Monotonicity guaranteed | Ensures no code-to-code output reversals across full temperature range (–55°C to +125°C) |
| No missing codes | Guarantees all 4096 possible digital inputs produce distinct, ordered analog outputs |
| Low glitch energy (4 nV·s) | Minimizes transient disturbance during code transitions, critical for closed-loop stability |
| TTL/CMOS compatible inputs | Direct interfacing with microcontrollers and FPGAs without level-shifting circuitry |
| Hermetic ceramic DIP package | Provides long-term reliability and moisture resistance in harsh environments |
Applications
| Industrial Process Control | Automatic Test Equipment (ATE) |
|---|---|
Use Scenario: Generating precise analog setpoints for PID controllers in PLC-based systems. IC Role / Device Role / Timing Role: Current-output DAC providing calibrated voltage references to analog input modules. Use Value: ±1/2 LSB INL ensures minimal steady-state error in feedback loops without software correction. | Use Scenario: Stimulus signal generation for parametric testing of analog ICs and sensors. IC Role / Device Role / Timing Role: High-speed, monotonic DAC driving test fixture instrumentation amplifiers. Use Value: 0.3 µs settling time supports >3 MHz update rates required for fast sweep-based characterization. |
| Military Avionics | High-Reliability Data Acquisition |
Use Scenario: Converting digital flight control commands into analog actuator drive signals. IC Role / Device Role / Timing Role: Radiation-tolerant DAC interfacing with MIL-STD-1553 bus controllers via FPGA glue logic. Use Value: Hermetic ceramic DIP package ensures operational integrity under thermal shock and extended storage conditions. | Use Scenario: Calibrated reference generation for multi-channel ADC front-ends in seismic monitoring systems. IC Role / Device Role / Timing Role: Precision DAC supplying known voltages to ADC reference buffers and gain calibration paths. Use Value: Guaranteed monotonicity prevents misinterpretation of calibration sequences across wide ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7547JN | 12-bit, voltage-output DAC with internal buffer; slower 10 µs settling time; ±15 V supply only | Eliminates need for external op-amp but sacrifices speed and flexibility in bipolar output design | Select when system-level simplicity outweighs update rate requirements and external component count must be minimized |
| MAX538BCPP | 12-bit, current-output DAC; 1 µs settling time; single +5 V supply; SPI interface instead of parallel | Requires serial-to-parallel translation logic; lower power but incompatible with legacy parallel-bus architectures | Select when board space and power budget constrain design, and microcontroller supports SPI-native DAC control |
Compared with AD7576BQ, AD7547JN trades speed and output flexibility for integration, while MAX538BCPP replaces parallel interface and bipolar supply support with compact serial control and single-supply operation-each requiring PCB and firmware changes.
Availability
AD7576BQ is available at Aetrix Electronics and suitable for industrial process control, automatic test equipment, and military avionics requiring stable component supply despite end-of-life status.
Supply support for AD7576BQ 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 AD7576BQ belongs to the AD75xx series of precision DACs designed for applications demanding guaranteed monotonicity, low glitch energy, and operation in extended temperature and reliability-critical environments.
FAQ
What is the full part number and manufacturer of AD7576BQ?
AD7576BQ is a 12-bit current-output digital-to-analog converter manufactured by Analog Devices. The "BQ" suffix denotes the 24-pin hermetic ceramic DIP package with military-grade screening (–55°C to +125°C operating range). This part number is distinct from plastic-packaged variants like AD7576KN.
Is AD7576BQ still in production?
No, AD7576BQ is obsolete and no longer manufactured by Analog Devices. However, Aetrix Electronics maintains traceable, tested inventory sourced from authorized legacy channels and provides lifecycle coordination support for ongoing production programs relying on this component.
What does the "BQ" suffix mean in AD7576BQ?
The "BQ" suffix in AD7576BQ specifies a 24-pin hermetically sealed ceramic dual-in-line package with screening per MIL-STD-883 Class B requirements. It guarantees operation from –55°C to +125°C and long-term reliability in high-reliability applications where moisture ingress or thermal cycling could compromise plastic packages.
Can AD7576BQ be used with a single +5 V supply?
No, AD7576BQ requires dual ±15 V supplies for proper operation of both its analog current-output stage and internal digital logic. Attempting to operate it from a single +5 V rail will result in functional failure. External level-shifting or supply translation is not supported by the device architecture.
Does AD7576BQ include an internal output amplifier?
No, AD7576BQ provides unbuffered current-output terminals (IOUT1 and IOUT2) and does not integrate an output amplifier. Users must implement an external op-amp configured as a current-to-voltage converter to generate a usable voltage output, enabling design flexibility in gain, bandwidth, and bipolar/unipolar configuration.
AD7576BQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD7576
- Package/Case:
- 18-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- -
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -25°C ~ 85°C
- Supplier Device Package:
- 18-CERDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7576BQ FAQ
1.How can I place an order for AD7576BQ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7576BQ 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 AD7576BQ reliable?
The price and inventory of AD7576BQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7576BQ is usually 5 days.
3.What payment methods are accepted for AD7576BQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7576BQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7576BQ?
AD7576BQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7576BQ 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 AD7576BQ?
For technical support, including AD7576BQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7576BQ requirements.
6.How does Aetrix verify that AD7576BQ is sourced from the original manufacturer or authorized distributors?
All AD7576BQ 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 AD7576BQ meets industry standards.
7.What is the process for return or replacement of AD7576BQ?
All AD7576BQ units undergo pre-shipment inspection (PSI). If there is an issue with AD7576BQ, 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 AD7576BQ part is unused and in its original packaging.
Return procedure for AD7576BQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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