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Analog Devices Inc. DAC08CQ
- Part No.:
- DAC08CQ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
DAC08CQ.pdf
- Description:
- IC DAC 8BIT A-OUT 16CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:16,863
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Product details
Overview
DAC08CQ from Analog Devices is an 8-bit, high-speed multiplying current-output digital-to-analog converter with complementary outputs, ±4.5 V to ±18 V dual supply operation, 85 ns settling time, and full-scale current prematched to ±1 LSB - used in waveform generation, servo motor control, and programmable power supplies.
For engineers reviewing the DAC08CQ datasheet, DAC08CQ pinout, DAC08CQ application, or DAC08CQ equivalent, this page delivers verified specifications, package-confirmed pin functions, real-world use scenarios, and two validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The DAC08CQ implements a monolithic R-2R ladder architecture with high-gain internal reference amplifier and adjustable-threshold logic interface. Its complementary current outputs (IOUT and IOUT) support differential operation and direct resistor-based voltage conversion without external op amps in many configurations.
It operates as a true multiplying DAC: output current scales linearly with both digital code and reference current (IREF), supporting bandwidth up to 1 MHz and full monotonicity across its 8-bit range. Logic inputs accept TTL, CMOS, ECL, HTL, and PMOS levels via user-adjustable VLC pin, enabling noise-immune interfacing across mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - guarantees monotonic 256-step output progression without missing codes. |
| Settling Time | 85 ns to ±1/2 LSB - enables 10+ MS/s waveform synthesis and fast closed-loop control updates. |
| Full-Scale Current Match | ±1 LSB max mismatch between IREF and IFS - eliminates need for full-scale trimming in most applications. |
| Output Voltage Compliance | −10 V to +18 V - supports wide analog swing with single-ended or quasi-differential load connections. |
| Reference Bandwidth | 1 MHz - allows dynamic multiplication using AC-coupled or pulsed reference signals. |
| Supply Range | ±4.5 V to ±18 V - accommodates battery-powered, industrial, and military/aerospace rails without level-shifting. |
| Logic Input Swing | −10 V to +18 V (V− = −15 V) - enables direct interface to 15 V CMOS or ECL even under ±5 V supply. |
| Nonlinearity | ±0.1% FS max over 0°C to +70°C - meets precision requirements for audio encoding and metering. |
Pinout & Package
Package: 16-lead CERDIP (Q suffix), hermetically sealed ceramic DIP with glass-sealed leads, rated for 0°C to +70°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive power supply | Accepts +4.5 V to +18 V; powers internal logic and reference amplifier. |
| V− | Negative power supply | Accepts −4.5 V to −18 V; defines lower compliance limit and logic swing floor. |
| VREF (+) | Reference current input (anode) | Current source node for IREF; connects to external R14 resistor for fixed-reference operation. |
| VREF (−) | Reference common-mode return | Completes reference current path; enables bipolar reference configurations when offset. |
| IOUT | True output current sink | Sinks current proportional to digital code; used for positive-logic DAC behavior. |
| IOUT | Complementary output current sink | Sinks (IFS − IOUT); enables differential output, inverted logic, or zero-crossing detection. |
| B1–B8 | Digital input bits (MSB to LSB) | CMOS/TTL/ECL-compatible parallel inputs; threshold set by VLC pin; no external pull-ups required. |
| VLC | Logic threshold control | Adjusts input switching point; grounded for TTL (VTH ≈ 1.4 V); biased for ECL/HTL compatibility. |
| COMP | Reference amplifier compensation | Connect capacitor to V− for stability; value depends on R14 (e.g., 75 pF for 5 kΩ). |
| NC | No connect | Not internally bonded; must remain unconnected per datasheet Figure 2. |
Key Features
| Feature | Design Value |
|---|---|
| 85 ns settling time | Enables >10 MS/s update rates in real-time control loops and high-fidelity waveform generation. |
| Complementary current outputs | Supports differential signaling, double peak-to-peak swing, and transformer/cable driving without extra amplifiers. |
| Adjustable logic threshold (VLC) | Allows seamless integration with TTL, ECL, CMOS, HTL, and PMOS without level translators or external biasing. |
| ±1 LSB full-scale matching | Removes requirement for factory or field trimming of reference resistor in most precision applications. |
| 1 MHz multiplying bandwidth | Permits use as digitally controlled gain stage or modulator in RF and communication signal paths. |
| −10 V to +18 V output compliance | Permits direct connection to high-voltage loads (e.g., CRT deflection, analog meter coils) without op-amp buffering. |
Applications
| Waveform Generation | Servo Motor Control |
|---|---|
|
Use Scenario: Generating precise triangle, sawtooth, or arbitrary waveforms at up to 10 MS/s for test equipment and signal sources. IC Role / Device Role / Timing Role: Current-output DAC providing fast, monotonic analog output directly converted to voltage via load resistor or op amp. Use Value: 85 ns settling and ±0.1% nonlinearity ensure low harmonic distortion and accurate amplitude fidelity across frequency bands. |
Use Scenario: Closed-loop position/velocity control of DC or stepper motors using digital command signals and feedback sensors. IC Role / Device Role / Timing Role: High-speed interface between microcontroller PWM/digital output and analog motor driver stage. Use Value: Complementary outputs enable differential drive to reduce EMI; wide compliance supports ±15 V H-bridge bias rails. |
| Programmable Power Supply | Audio Encoder / Attenuator |
|
Use Scenario: Digitally setting output voltage/current limits and regulation setpoints in lab-grade or embedded power supplies. IC Role / Device Role / Timing Role: Multiplying DAC converting digital commands into precise reference currents for error amplifier feedback networks. Use Value: 1 MHz reference bandwidth and ±10 ppm/°C full-scale drift maintain accuracy across line/load/temperature variations. |
Use Scenario: Digital volume control and audio signal encoding in professional audio mixers and broadcast gear. IC Role / Device Role / Timing Role: Low-glitch, monotonic current source feeding summing amplifier to produce smooth attenuation curves. Use Value: ±1 LSB matching and 8-bit resolution deliver 48 dB dynamic range with minimal step-size nonlinearity artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multiplying DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7524JRZ | 8-bit, voltage-output, ±15 V supply, 100 ns settling, no complementary outputs, requires external op amp for current-to-voltage conversion. | Less suitable for differential or high-compliance loads; better for low-noise, op-amp-buffered precision voltage outputs. | Select AD7524JRZ when voltage output and board space allow external op amp; avoid if direct current sinking or wide compliance is needed. |
| MAX538BCPE+ | 8-bit, current-output, ±5 V only, 1 µs settling, integrated reference, no VLC adjustment, SOIC-16 package. | Targeted at low-voltage, cost-sensitive consumer designs; lacks high-speed, wide-supply, or multi-logic-family flexibility. | Choose MAX538BCPE+ for compact, single-supply 5 V systems where 85 ns speed and ±18 V compliance are unnecessary. |
Compared with AD7524JRZ and MAX538BCPE+, DAC08CQ uniquely combines 85 ns speed, ±18 V compliance, complementary outputs, and universal logic interfacing - making it irreplaceable in high-performance analog signal generation and industrial control where timing, voltage range, and interface versatility are critical.
Availability
DAC08CQ is available at Aetrix Electronics and suitable for waveform generation, servo motor control, and programmable power supplies requiring stable component supply, long-term obsolescence management, and MIL-qualified variants.
Supply support for DAC08CQ 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, serving industrial, automotive, communications, and defense markets since 1965.
The DAC08 series was designed for high-speed, low-cost, and universally interfaced digital-to-analog conversion in demanding real-time systems - emphasizing settling speed, output flexibility, and robustness across logic families and supply conditions.
FAQ
What is the operating temperature range for DAC08CQ?
The DAC08CQ is specified for 0°C to +70°C ambient operation, consistent with its Q-suffix CERDIP packaging and commercial/military hybrid-grade qualification. This range is explicitly defined in the Absolute Maximum Ratings table and Electrical Characteristics section of the Rev. C datasheet, and differs from the wider −55°C to +125°C range of DAC08AQ/DAC08Q variants.
Does DAC08CQ require external op amps to generate voltage outputs?
No - DAC08CQ's high-output-impedance complementary current outputs can be directly converted to voltage using simple resistive loads tied to appropriate bias points (e.g., ground or V−), especially within its −10 V to +18 V compliance range. External op amps are optional for low-impedance, buffered, or differential voltage outputs but not mandatory for basic functionality.
How does the VLC pin affect DAC08CQ logic compatibility?
The VLC pin sets the logic threshold voltage (VTH ≈ VLC + 1.4 V) for all eight digital inputs. Grounding VLC yields ~1.4 V threshold for TTL/DTL; biasing to −1.8 V enables ECL compatibility; and adjusting to +6.2 V supports 15 V CMOS. This eliminates level shifters and ensures noise immunity across logic families without changing PCB layout.
What is the maximum reference current (IREF) supported by DAC08CQ?
DAC08CQ supports IREF from 0.2 mA to 4.0 mA per datasheet Section "Reference Amplifier Setup". At 4.0 mA, full-scale output current reaches ~4.2 mA (per Table 1 IOR2), but negative output compliance degrades - so 2.0 mA is the recommended maximum for balanced performance across temperature and supply conditions.
Can DAC08CQ operate from asymmetric power supplies?
Yes - DAC08CQ functions correctly with asymmetric supplies (e.g., +5 V / −12 V) because its internal bias network and logic interface are supply-ratio independent. The datasheet confirms insensitivity to supply variation, and absolute ratings specify independent V+ and V− limits (up to +18 V and down to −18 V), enabling flexible rail selection in mixed-signal systems.
DAC08CQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 8
- Number of D/A Converters:
- 1
- Settling Time:
- 150µs
- Output Type:
- Current - Unbuffered
- Differential Output:
- No
- Data Interface:
- Parallel
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±4.5V ~ 18V
- Voltage - Supply, Digital:
- 9V ~ 36V
- INL/DNL (LSB):
- -
- Architecture:
- Multiplying DAC
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-CERDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
DAC08CQ FAQ
1.How can I place an order for DAC08CQ through Aetrix?
Please submit a Request for Quotation (RFQ) for DAC08CQ 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 DAC08CQ reliable?
The price and inventory of DAC08CQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DAC08CQ is usually 5 days.
3.What payment methods are accepted for DAC08CQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DAC08CQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DAC08CQ?
DAC08CQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DAC08CQ 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 DAC08CQ?
For technical support, including DAC08CQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DAC08CQ requirements.
6.How does Aetrix verify that DAC08CQ is sourced from the original manufacturer or authorized distributors?
All DAC08CQ 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 DAC08CQ meets industry standards.
7.What is the process for return or replacement of DAC08CQ?
All DAC08CQ units undergo pre-shipment inspection (PSI). If there is an issue with DAC08CQ, 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 DAC08CQ part is unused and in its original packaging.
Return procedure for DAC08CQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DAC08CQ Tags
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