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Analog Devices Inc. DAC8222GPZ
- Part No.:
- DAC8222GPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
DAC8222GPZ.pdf
- Description:
- IC DAC 12BIT A-OUT 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,874
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Product details
Overview
DAC8222GPZ from Analog Devices is a dual 12-bit, double-buffered, multiplying CMOS DAC with matched performance (≤1% DAC-to-DAC gain mismatch), ±1/2 LSB endpoint linearity over temperature, and single-supply operation from +5 V to +15 V. It delivers 1 µs current settling time, supports four-quadrant multiplication, and is used in precision programmable gain control and automated test equipment.
For engineers reviewing the DAC8222GPZ datasheet, DAC8222GPZ pinout, DAC8222GPZ application, or DAC8222GPZ equivalent, key selection criteria include guaranteed monotonicity (±1 LSB DNL), low output leakage (±50 nA over full temp range), dual independent reference inputs (VREF A/VREF B), and compatibility with TTL/CMOS logic at both +5 V and +15 V supply rails.
Technical Context
The DAC8222GPZ integrates two independent thin-film R-2R ladder networks with binarily scaled NMOS current switches, enabling precise current-steering output. Its double-buffered architecture uses separate input and DAC registers controlled by WR and LDAC signals, allowing simultaneous or staggered updates of both DAC outputs.
Each DAC features dedicated reference (VREF A/VREF B) and feedback (RFB A/RFB B) terminals, supporting unipolar (2-quadrant) and bipolar (4-quadrant) multiplication modes. The device operates with AGND and DGND tied at the socket, and internal resistor ladder termination to AGND enables robust single-supply current-switching configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - resolves full-scale range into 4096 discrete output steps |
| Relative Accuracy (INL) | ±1/2 LSB endpoint linearity - ensures high-fidelity transfer function across full code range |
| Differential Nonlinearity (DNL) | ±1 LSB - guarantees monotonic output behavior for all codes |
| Settling Time | 1 µs - time for output current to settle within 1/2 LSB of final value after digital update |
| Supply Range | +5 V to +15 V single supply - eliminates need for negative rail in many industrial systems |
| Reference Inputs | Separate VREF A and VREF B - enables independent scaling or polarity control per channel |
| Output Leakage | ±50 nA over full temperature range - minimizes error in high-impedance I-V conversion circuits |
Pinout & Package
Package: 24-lead narrow-body plastic DIP (0.3" width), RoHS-compliant, through-hole mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 23 | No Connect | Unused pins; must remain floating or grounded per layout best practice |
| 2 (IOUT A) | DAC A Output Current | Sinks binary-weighted current; requires external op amp for I-V conversion |
| 3 (RFB A) | DAC A Feedback Resistor Terminal | Connects to op amp output for internal RFB use; only functional when VDD is applied |
| 4 (VREF A) | DAC A Reference Input | High-impedance input (8–15 kΩ); sets full-scale current magnitude and polarity |
| 5 (AGND) | Analog Ground | Reference for analog circuitry; tie to DGND at single point near device socket |
| 6–17 (DB0–DB11) | Parallel Digital Data Bus | 12-bit TTL/CMOS-compatible inputs; LSB = DB0, MSB = DB11 |
| 18 (DAC A/DAC B) | DAC Selection Control | Active-low selects DAC A; active-high selects DAC B for write operations |
| 19 (LDAC) | Load DAC Register | Active-low strobe transfers data from input registers to DAC registers simultaneously |
| 20 (WR) | Write Enable | Active-low loads data into selected DAC's input register; controls transparency mode |
| 21 (VDD) | Positive Supply | +5 V to +15 V single supply; powers analog and digital sections |
| 22 (VREF B) | DAC B Reference Input | Independent reference path for second DAC; supports differential or asymmetric scaling |
| 24 (IOUT B) | DAC B Output Current | Second independent current output; matched to IOUT A within 1% gain error |
Key Features
| Feature | Design Value |
|---|---|
| Double-buffered digital inputs | Enables glitch-free simultaneous update of both DAC outputs via LDAC strobe |
| Matched dual DAC architecture | DAC-to-DAC gain mismatch ≤1% ensures consistent scaling across channels in closed-loop systems |
| Four-quadrant multiplication support | Accepts ±25 V on VREF pins, enabling bipolar signal generation and AC-coupled modulation |
| Low-power single-supply operation | IDD ≤ 2 mA at +5 V with logic inputs at valid levels - suitable for battery-powered instrumentation |
| ESD-protected digital inputs | Zener-clamped inputs withstand ≥4000 V HBM - reduces need for external protection in board-level design |
Applications
| Automatic Test Equipment (ATE) | Programmable Gain/Attenuation Control |
|---|---|
Use Scenario: Generating precise stimulus waveforms and calibration references in semiconductor test systems. IC Role / Device Role / Timing Role: Dual-channel DAC providing synchronized, independently scaled analog outputs for multi-site parallel testing. Use Value: Matched DAC performance (≤1% gain error) ensures consistent test margins across channels without per-channel calibration. | Use Scenario: Dynamically adjusting signal amplitude in RF front-ends, audio processing, and sensor conditioning circuits. IC Role / Device Role / Timing Role: Multiplying DAC acting as digitally controlled transconductance element in feedback paths of op-amp-based gain stages. Use Value: Four-quadrant operation allows bidirectional gain control (positive/negative scaling) using a single reference voltage source. |
| Robotics & Motion Control | Battery-Operated Precision Instrumentation |
Use Scenario: Closed-loop position/velocity control in servo drives and robotic joint actuators. IC Role / Device Role / Timing Role: Dual DAC generating complementary PWM-modulated current references for H-bridge motor drivers. Use Value: 1 µs settling time supports high-bandwidth current loop updates; double-buffering prevents mid-cycle output glitches during trajectory changes. | Use Scenario: Portable medical monitors, handheld calibrators, and field-deployable sensors requiring long battery life and stable analog outputs. IC Role / Device Role / Timing Role: Low-power DAC converting microcontroller outputs into calibrated analog sensor excitation or display drive signals. Use Value: <50 nA output leakage and ±1/2 LSB linearity maintain accuracy over extended operating temperature and battery discharge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel multiplying DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5724RBRUZ | 14-bit resolution, integrated reference, SPI interface, no parallel bus; higher INL (±4 LSB) | Requires microcontroller with SPI; unsuitable for direct 16-bit bus interfacing | Select when system uses serial control and needs higher resolution with built-in reference |
| DAC8162IDRCT | 16-bit resolution, I²C interface, single supply (2.7–5.5 V), no four-quadrant multiplication | Limited to unipolar output; incompatible with bipolar signal generation or AC-coupled applications | Select for low-voltage, space-constrained designs where 16-bit precision outweighs multiplication flexibility |
Compared with DAC8222GPZ, AD5724RBRUZ offers higher resolution but lacks parallel interface and true four-quadrant capability, while DAC8162IDRCT provides finer quantization at lower supply voltage but cannot perform bipolar multiplication - making DAC8222GPZ uniquely suited for legacy bus-connected, dual-channel, fully programmable analog signal generation.
Availability
DAC8222GPZ is available at Aetrix Electronics and suitable for automatic test equipment, robotics motion control, and programmable gain/attenuation systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DAC8222GPZ 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 healthcare markets.
The DAC8222GPZ belongs to Analog Devices' precision DAC product line, designed specifically for applications demanding matched dual-channel performance, wide supply flexibility, and robust four-quadrant multiplication in industrial automation and test instrumentation.
FAQ
What is the maximum operating temperature range for the DAC8222GPZ?
The DAC8222GPZ is rated for 0°C to +70°C operation, matching the GP-grade specification in the Analog Devices ordering guide. This commercial temperature range is validated across all electrical parameters including ±1/2 LSB INL, ±1 LSB DNL, and 1 µs settling time. Operation outside this range may degrade performance or violate absolute maximum ratings such as junction temperature (+150°C) or VREF voltage limits (±25 V).
Does the DAC8222GPZ support true four-quadrant multiplication?
Yes, the DAC8222GPZ supports true four-quadrant multiplication via independent VREF A and VREF B inputs rated for ±25 V, enabling bipolar output generation in configurations like Figure 25 of the datasheet. Each DAC's output current polarity and magnitude scale linearly with its respective reference voltage sign and amplitude, allowing AC signal synthesis, offset binary coding, and bidirectional gain control - a capability confirmed in the GENERAL DESCRIPTION and APPLICATIONS INFORMATION sections.
How does the double-buffered architecture of the DAC8222GPZ improve system performance?
The DAC8222GPZ's double-buffered architecture separates input latching (via WR) from output updating (via LDAC), eliminating output glitches during asynchronous data loading. This allows one DAC to be updated while the other holds its value, or both to be synchronized on a single LDAC edge - critical for coordinated multi-axis control in robotics or phase-aligned waveform generation in ATE. The Mode Selection Table confirms transparent and latched states for both registers under all WR/LDAC combinations.
Can the DAC8222GPZ operate from a +3.3 V supply?
No, the DAC8222GPZ requires a minimum supply voltage of +5 V as specified in Absolute Maximum Ratings and Electrical Characteristics. Attempting +3.3 V operation violates the VINH specification (2.4 V min at VDD = +5 V) and risks undefined logic behavior, increased DNL, or failure to meet the guaranteed ±1/2 LSB INL. The device is optimized for +5 V to +15 V single-supply operation, with tested performance only validated within that range.
What is the purpose of the RFB A and RFB B pins on the DAC8222GPZ?
The RFB A and RFB B pins serve as internal feedback resistor connections for each DAC channel, enabling direct op amp I-V conversion without external resistors when the op amp output is wired to RFB. As stated in the GENERAL CIRCUIT DESCRIPTION, these pins are only functional when VDD is applied, and their resistance cannot be measured without power. Using RFB simplifies unipolar configurations (Figure 24) and maintains gain accuracy by leveraging the matched thin-film resistors fabricated on-die.
DAC8222GPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 12
- Number of D/A Converters:
- 2
- Settling Time:
- 1µs
- Output Type:
- Current - Unbuffered
- Differential Output:
- No
- Data Interface:
- Parallel
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V ~ 15V
- Voltage - Supply, Digital:
- 5V ~ 15V
- INL/DNL (LSB):
- ±0.5 (Max), ±2 (Max)
- Architecture:
- R-2R
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
DAC8222GPZ FAQ
1.How can I place an order for DAC8222GPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for DAC8222GPZ 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 DAC8222GPZ reliable?
The price and inventory of DAC8222GPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DAC8222GPZ is usually 5 days.
3.What payment methods are accepted for DAC8222GPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DAC8222GPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DAC8222GPZ?
DAC8222GPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DAC8222GPZ 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 DAC8222GPZ?
For technical support, including DAC8222GPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DAC8222GPZ requirements.
6.How does Aetrix verify that DAC8222GPZ is sourced from the original manufacturer or authorized distributors?
All DAC8222GPZ 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 DAC8222GPZ meets industry standards.
7.What is the process for return or replacement of DAC8222GPZ?
All DAC8222GPZ units undergo pre-shipment inspection (PSI). If there is an issue with DAC8222GPZ, 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 DAC8222GPZ part is unused and in its original packaging.
Return procedure for DAC8222GPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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