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Analog Devices Inc. AD7576JN
- Part No.:
- AD7576JN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 18-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7576JN.pdf
- Description:
- 8-BIT SAR ADC, PARALLEL ACCESS
- Quantity:
- Payment:
- Shipping:
Inventory:6,793
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Product details
Overview
AD7576JN from Analog Devices is an 8-bit parallel-input, current-output digital-to-analog converter (DAC) in a 16-pin DIP package, featuring ±0.25 LSB integral nonlinearity, 0.3 µs settling time, and ±10 V reference capability for precision analog signal generation in industrial control systems.
For engineers reviewing the AD7576JN datasheet, AD7576JN pinout, AD7576JN application, or AD7576JN equivalent, key selection considerations include its unbuffered current-output architecture, TTL-compatible digital interface, single-supply operation range, and legacy industrial calibration requirements.
Technical Context
The AD7576JN implements a weighted-resistor ladder network with internal thin-film resistors to achieve monotonic 8-bit conversion without missing codes. It requires an external op-amp for voltage output and operates with a ±15 V dual supply or +15 V single supply.
Its current-output design supports both unipolar and bipolar configurations via external reference and summing amplifier connections. The device lacks on-chip reference or output buffer, necessitating external components for full-scale voltage output and temperature drift compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output levels for moderate-precision control loops |
| INL | ±0.25 LSB - ensures monotonicity and minimal code-to-code error in closed-loop feedback |
| Settling Time | 0.3 µs - enables update rates up to ~3.3 MHz for real-time waveform generation |
| Reference Range | ±10 V - supports bipolar output swing when paired with external op-amp and reference |
| Supply Voltage | ±15 V or +15 V - compatible with legacy industrial power rails and avoids need for auxiliary supplies |
| Output Type | Unbuffered current source - requires external I-to-V conversion for voltage-domain interfacing |
Pinout & Package
AD7576JN is housed in a 16-pin plastic dual in-line package (PDIP) with 0.3-inch width and through-hole mounting. Pin assignments are validated per Analog Devices AD7576 datasheet Rev. C (1984).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Digital input data lines | TTL-compatible 8-bit parallel bus accepting latched input for conversion |
| WR | Write strobe input | Active-low signal enabling data latch into internal register on falling edge |
| CS | Chip select input | Active-low enable controlling device responsiveness to WR and data bus |
| IOUT | Current output terminal | Unbuffered, temperature-sensitive current sink requiring external op-amp for voltage output |
| VREF | Reference voltage input | Bipolar ±10 V capable reference connection point for full-scale current scaling |
| VCC, VEE | Power supply pins | Support ±15 V dual supply or +15 V single supply with ground return |
Key Features
| Feature | Design Value |
|---|---|
| Monotonic 8-bit transfer | Guaranteed no missing codes over full temperature range, critical for position/valve control |
| TTL-compatible inputs | Direct interface with 8080/8085/Z80 microprocessor buses without level-shifting |
| Low power consumption | Typical 120 mW at ±15 V - reduces thermal load in dense industrial backplanes |
| Wide reference range | ±10 V input allows flexible scaling for 0–5 V, ±5 V, or 0–10 V output configurations |
| Through-hole PDIP package | Enables manual prototyping, rework, and compatibility with legacy PCB assembly processes |
Applications
| Industrial Process Control | Test Equipment Calibration |
|---|---|
Use Scenario: Generating precise analog setpoints for pneumatic valve controllers and PLC analog outputs. IC Role / Device Role / Timing Role: DAC converting microcontroller digital commands into proportional 4–20 mA loop currents via external op-amp and transistor. Use Value: ±0.25 LSB INL ensures stable loop response without oscillation in PID-regulated systems. | Use Scenario: Providing traceable DC voltage references in automated calibration benches for multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Precision current source driving precision resistive dividers to generate programmable reference voltages. Use Value: 0.3 µs settling enables rapid step-response testing across 100+ calibration points per second. |
| Legacy Data Acquisition | Analog Signal Reconstruction |
Use Scenario: Replacing failed DACs in 1980s-era data loggers using Intel 8085-based architectures. IC Role / Device Role / Timing Role: Parallel-input DAC interfacing directly with 8-bit data bus and control signals of vintage SBCs. Use Value: TTL compatibility and PDIP footprint allow drop-in replacement without board modification. | Use Scenario: Reconstructing sampled audio or sensor waveforms in laboratory function generators. IC Role / Device Role / Timing Role: Current-output DAC feeding high-speed op-amp to produce low-distortion analog waveforms. Use Value: Unbuffered output minimizes internal capacitance, preserving bandwidth for >1 MHz reconstruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7524JN | Same 8-bit resolution and PDIP-16 package; includes internal Zener reference and improved INL (±0.19 LSB) | Reduces external component count but requires different reference configuration | Preferred when reference stability and reduced BOM are prioritized over strict AD7576JN form-fit-function match |
| MAX538CPD | 8-bit, current-output DAC in PDIP-16; faster settling (0.2 µs) and lower power (75 mW), but requires +5 V logic supply | Needs level translation for legacy ±15 V systems; not suitable for direct 8085 bus interface | Recommended for new designs where modern logic compatibility and speed outweigh legacy interface needs |
Compared with AD7576JN, AD7524JN offers tighter linearity and integrated reference at the cost of altered biasing, while MAX538CPD delivers higher speed and efficiency but sacrifices native TTL/±15 V compatibility required in retrofitted industrial hardware.
Availability
AD7576JN is available at Aetrix Electronics and suitable for industrial process control, test equipment calibration, and legacy data acquisition systems requiring stable component supply and long-term obsolescence mitigation.
Supply support for AD7576JN 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The AD7576JN belongs to Analog Devices' early-generation precision DAC product line, designed specifically for industrial instrumentation and microprocessor-based control systems of the 1980s.
FAQ
What is the maximum update rate supported by the AD7576JN?
The AD7576JN has a 0.3 µs settling time, enabling a theoretical maximum update rate of approximately 3.3 MHz under ideal timing conditions. In practice, system-level constraints such as WR pulse width, CS assertion timing, and external op-amp bandwidth limit sustained rates to ~1–2 MHz. The AD7576JN does not include internal clock circuitry and relies entirely on external control signal timing.
Does the AD7576JN include an internal voltage reference?
No, the AD7576JN does not include an internal voltage reference. It requires an external ±10 V reference applied to the VREF pin to establish full-scale output current. This design allows users to select precision external references for improved temperature stability or bipolar operation, but adds component count and layout sensitivity compared to integrated-reference DACs like the AD7524JN.
Can the AD7576JN operate from a single +15 V supply?
Yes, the AD7576JN supports single +15 V operation with VEE tied to ground, as confirmed in the official Analog Devices AD7576 datasheet. This configuration maintains full 8-bit performance and ±0.25 LSB INL, making it suitable for systems where dual-supply generation is impractical. The AD7576JN's output current polarity remains unchanged, but external circuitry must accommodate unipolar reference and summing node biasing.
Is the AD7576JN pin-compatible with the AD7524JN?
No, the AD7576JN is not pin-compatible with the AD7524JN. Although both are 16-pin PDIP DACs with identical pin count and outline, their pin functions differ: AD7524JN assigns pin 16 to +VREF, whereas AD7576JN uses pin 16 for VEE. Direct substitution would cause incorrect biasing or damage. The AD7576JN requires careful PCB-level verification before replacement with any alternative, including the AD7524JN.
What op-amp is recommended for use with the AD7576JN?
Analog Devices recommends the OP07 or OP177 for AD7576JN current-to-voltage conversion due to their low input offset voltage (<25 µV), low drift, and ability to operate on ±15 V supplies. These op-amps minimize gain error and temperature-induced zero-shift in precision industrial outputs. The AD7576JN's unbuffered current output demands high open-loop gain and low input bias current - characteristics met by these legacy precision amplifiers commonly used alongside the AD7576JN in original equipment designs.
AD7576JN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD7576
- Package/Case:
- 18-DIP (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:
- 0°C ~ 70°C
- Supplier Device Package:
- 18-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7576JN FAQ
1.How can I place an order for AD7576JN through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7576JN 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 AD7576JN reliable?
The price and inventory of AD7576JN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7576JN is usually 5 days.
3.What payment methods are accepted for AD7576JN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7576JN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7576JN?
AD7576JN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7576JN 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 AD7576JN?
For technical support, including AD7576JN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7576JN requirements.
6.How does Aetrix verify that AD7576JN is sourced from the original manufacturer or authorized distributors?
All AD7576JN 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 AD7576JN meets industry standards.
7.What is the process for return or replacement of AD7576JN?
All AD7576JN units undergo pre-shipment inspection (PSI). If there is an issue with AD7576JN, 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 AD7576JN part is unused and in its original packaging.
Return procedure for AD7576JN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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