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Analog Devices Inc. AD7669ARZ-REEL
- Part No.:
- AD7669ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7669ARZ-REEL.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,286
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Product details
Overview
AD7669ARZ-REEL from Analog Devices is a complete, monolithic 8-bit analog I/O system integrating dual DACs with output amplifiers, a successive-approximation ADC with track/hold, on-chip bandgap reference, and fast 8-bit parallel bus interface. It operates from single +5 V or dual ±5 V supplies, supports programmable unipolar (0 to +1.25 V / 0 to +2.5 V) and bipolar (±1.25 V / ±2.5 V) ranges, and delivers 2 µs ADC conversion time and 1 µs DAC settling time - used in precision data acquisition subsystems for industrial process control and automated test equipment.
For engineers reviewing the AD7669ARZ-REEL datasheet, AD7669ARZ-REEL pinout, AD7669ARZ-REEL application, or AD7669ARZ-REEL equivalent, key selection considerations include dual-DAC matching (±2.5 LSB full-scale error match), bipolar/unipolar range flexibility via RANGE/VSS pins, LC2MOS process-based crosstalk isolation (–70 dB DACA-to-DACB), and microprocessor-compatible timing (WR pulse width < 80 ns, bus relinquish < 75 ns).
Technical Context
The AD7669ARZ-REEL implements two independent 8-bit voltage-mode DACs sharing a common on-chip 1.25 V bandgap reference and separate output buffer amplifiers, each capable of ±2.5 V output into 2 kΩ//100 pF. Its ADC uses a successive-approximation architecture with integrated track/hold (200 kHz bandwidth) and internal clock option (1.6–2.6 µs conversion).
Digital interface follows Mode 1 parallel protocol: CS/WR edge-triggered DAC loading, ST-edge-triggered ADC start, and RD-driven data readback with BUSY/INT status signaling. Input coding is binary under single supply (VSS = 0 V) and 2's complement under dual supply (VSS = –5 V), with RANGE pin selecting both DAC output and ADC input voltage ranges simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit for both ADC and dual DACs - enables 256-step quantization across all supported ranges. |
| ADC Conversion Time | 2 µs max with external 5 MHz clock - supports up to 400 kSPS sampling without pipeline latency. |
| DAC Settling Time | 1 µs typical to ±1/2 LSB - ensures stable analog output within one microprocessor bus cycle. |
| DAC Full-Scale Error Match | ±2.5 LSB max between DACA and DACB - critical for differential or ratiometric output applications. |
| Signal-to-Noise Ratio (ADC) | 44 dB min at 100 kHz input - sufficient for 7.2 ENOB in medium-speed measurement systems. |
| Reference Voltage | On-chip 1.25 V bandgap - eliminates external reference component and trim, reducing BOM count and calibration effort. |
| Supply Range | +4.75 V to +5.25 V (VDD); –4.75 V to –5.25 V (VSS) - compatible with standard ±5 V linear power supplies. |
Pinout & Package
AD7669ARZ-REEL is housed in a 28-pin SOIC (R-28) package with exposed pad not electrically connected. Pin functions are defined per Analog Devices REV. B datasheet and validated for this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply rail | Provides +5 V power to analog and digital sections; must be decoupled locally to AGNDDAC/AGNDADC/DGND. |
| VSS | Negative supply or ground reference | Selects unipolar (0 V) or bipolar (–5 V) operation and determines data coding format (binary vs. 2's complement). |
| RANGE | Range configuration input | With VSS, selects 0–1.25 V, 0–2.5 V, ±1.25 V, or ±2.5 V for both DAC outputs and ADC input simultaneously. |
| RESET | Asynchronous reset | Clears DAC registers to 0x00 and deasserts INT; sets DAC output to 0 V (unipolar) or –FS (bipolar). |
| CS | Chip select (active low) | Enables device for WR or RD operations; must be asserted before WR/RD edges for valid bus transactions. |
| WR | Write strobe (rising edge) | Latches DB7–DB0 into selected DAC register (A/B pin determines DACA or DACB on AD7669). |
| A/B | DAC select | Low = write to DACA; high = write to DACB - enables independent control of dual outputs. |
| RD | Read strobe (active low) | Outputs ADC result on DB7–DB0 when BUSY is low; initiates conversion in Mode 2 interface. |
| ST | Start conversion (falling edge) | Triggers ADC sample-and-hold and conversion independently of CS - enables precise timing control. |
| BUSY | Status output (active low) | Indicates ongoing ADC conversion; goes low at ST fall and high after conversion completes. |
| INT | Interrupt output (active low) | Signals ADC conversion completion; cleared by rising edge of CS or RD, or RESET pulse. |
| VIN | ADC analog input | Accepts selected input range (e.g., ±2.5 V); requires external anti-aliasing filter for Nyquist compliance. |
| VOUTA / VOUTB | DAC analog outputs | Buffered, rail-to-rail capable outputs; each drives 2 kΩ//100 pF load with <1 µs settling. |
| AGNDDAC / AGNDADC | Analog ground returns | Separate ground paths minimize DAC–ADC crosstalk; must be tied at single point near device. |
| DGND | Digital ground | Return for logic signals; isolated from analog grounds except at star point to reduce noise coupling. |
| DB7–DB0 | 8-bit bidirectional data bus | Carries DAC input data (write) or ADC output data (read); TTL/CMOS compatible thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched DACs on single die | ±2.5 LSB full-scale error match between DACA and DACB enables precision differential output generation without external trimming. |
| Integrated bandgap reference | 1.25 V, temperature-compensated reference shared by ADC and DAC eliminates external reference IC and associated layout sensitivity. |
| Programmable bipolar/unipolar ranges | Single RANGE/VSS combination configures both DAC outputs and ADC input - simplifies system-level range switching logic. |
| LC2MOS mixed-signal process | Combines precision bipolar analog circuits with low-power CMOS logic - achieves 44 dB SNR and –70 dB DAC-to-DAC isolation in compact SOIC. |
| Microprocessor-optimized timing | Bus access/relinquish <75 ns and WR pulse width <80 ns - interfaces directly with 8051, Z80, and 68K-family microcontrollers without wait states. |
Applications
| Industrial Process Control | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Closed-loop control of pneumatic valves and motor drives using real-time feedback from sensors and actuator commands. IC Role / Device Role / Timing Role: Dual DAC generates synchronized setpoint and bias voltages; ADC digitizes sensor feedback with 2 µs latency for PID loop execution. Use Value: Integrated dual-DAC matching (±2.5 LSB) ensures consistent gain/offset across control channels, reducing calibration overhead in multi-channel PLC modules. |
Use Scenario: Stimulus-response testing of analog circuits requiring simultaneous stimulus generation and response capture. IC Role / Device Role / Timing Role: DACA outputs calibrated test waveform while DACB provides reference offset; ADC samples DUT output with precise ST-triggered sampling. Use Value: On-chip bandgap reference guarantees <±3 LSB total unadjusted error across temperature, enabling pass/fail decisions without per-unit reference calibration. |
| Data Acquisition Subsystems | Embedded Instrumentation |
Use Scenario: Compact, self-contained DAQ module for field-deployable environmental monitoring (temperature, pressure, gas sensing). IC Role / Device Role / Timing Role: ADC acquires sensor signals; dual DACs drive analog front-end biasing and calibration references. Use Value: Single +5 V supply operation and 0–2.5 V unipolar range simplify power design and interface to 3.3 V microcontrollers via level-shifting buffers. |
Use Scenario: Real-time waveform generation and analysis in portable oscilloscopes or signal analyzers with limited PCB area. IC Role / Device Role / Timing Role: DACA/DACB generate I/Q baseband signals; ADC captures demodulated outputs with 400 kSPS capability. Use Value: 28-pin SOIC footprint and integrated track/hold eliminate need for external THA, reducing board space by >30% versus discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-DAC + ADC analog I/O applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7669BN | Same functionality, plastic DIP-28 package, ±0.5 LSB relative accuracy (vs. ±1 LSB for AD7669ARZ-REEL) | Higher-accuracy requirement in lab-grade instrumentation where DAC linearity dominates system error budget | Select AD7669BN when tighter relative accuracy (±0.5 LSB) justifies through-hole assembly and larger footprint. |
| AD7669JR | Same SOIC-28 package, commercial temperature range (0°C to +70°C), identical ±1 LSB relative accuracy | Cost-sensitive industrial controls where extended temperature operation is not required | Choose AD7669JR for volume production in benign environments to reduce procurement cost without sacrificing performance or form factor. |
Compared with AD7669BN and AD7669JR, the AD7669ARZ-REEL offers industrial temperature range (–40°C to +85°C) in tape-and-reel SOIC packaging - making it optimal for automated SMT manufacturing and field-deployed embedded systems requiring thermal robustness and assembly efficiency.
Availability
AD7669ARZ-REEL is available at Aetrix Electronics and suitable for industrial process control, automated test equipment, data acquisition subsystems, and embedded instrumentation requiring stable component supply across extended temperature ranges and high-volume SMT production.
Supply support for AD7669ARZ-REEL 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7669ARZ-REEL belongs to Analog Devices' legacy LC2MOS analog I/O family, designed specifically for embedded systems requiring tightly integrated, low-component-count analog interfacing with microprocessors - targeting industrial, instrumentation, and test applications.
FAQ
What is the operating temperature range of the AD7669ARZ-REEL?
The AD7669ARZ-REEL is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Analog Devices ordering guide for the "AR" grade. This range ensures reliable performance in factory automation, motor control, and outdoor instrumentation environments where ambient temperatures exceed commercial limits. The AD7669ARZ-REEL maintains specified DC accuracy (±1 LSB relative accuracy) and dynamic performance (44 dB SNR) across this full range.
Does the AD7669ARZ-REEL require an external reference voltage?
No, the AD7669ARZ-REEL integrates a temperature-compensated 1.25 V bandgap reference that serves both the ADC and dual DACs. This eliminates the need for external reference components, reduces PCB area, and avoids reference-related errors such as drift and noise coupling. The internal reference contributes to the ±3 LSB total unadjusted error specification and is trimmed at wafer sort for absolute accuracy and tempco.
How does the RANGE pin configure input and output voltage ranges on the AD7669ARZ-REEL?
The RANGE pin works in conjunction with VSS to select one of four combined analog ranges: with VSS = 0 V and RANGE = 0 → 0 to +1.25 V; VSS = 0 V and RANGE = 1 → 0 to +2.5 V; VSS = –5 V and RANGE = 0 → ±1.25 V; VSS = –5 V and RANGE = 1 → ±2.5 V. Critically, this setting applies identically to both DAC outputs (VOUTA/VOUTB) and ADC input (VIN), ensuring consistent scaling across the analog I/O path without software remapping.
What is the DAC-to-DAC crosstalk specification for the AD7669ARZ-REEL?
The AD7669ARZ-REEL specifies DAC-to-DAC isolation of –70 dB maximum (worst-case) between DACA and DACB, measured with a 20 kHz digitized sine wave at 2.5 V pk-pk. This isolation level ensures minimal interference when generating independent waveforms - for example, I/Q signals or differential outputs - and is achieved through physical separation of analog sections and LC2MOS process optimization. Glitch impulse coupling is further limited to 1 nV·s typical.
Can the AD7669ARZ-REEL interface directly with a 3.3 V microcontroller?
Yes, the AD7669ARZ-REEL digital interface (CS, WR, RD, DB7–DB0) is fully compatible with 3.3 V logic levels when operated with VDD = +5 V: input high voltage threshold is 2.4 V min, and output high voltage is 4.0 V min into 200 µA load. However, level-shifting is required for bidirectional data bus integrity if the microcontroller cannot tolerate 5 V inputs - a simple resistor-divider or dedicated level translator on DB7–DB0 is recommended to prevent latch-up or excessive current draw.
AD7669ARZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LC²MOS
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Analog I/O
- Interface:
- Bus
- Voltage - Supply:
- 4.75V ~ 5.25V
- Supplier Device Package:
- 28-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AD7669ARZ-REEL FAQ
1.How can I place an order for AD7669ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7669ARZ-REEL 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 AD7669ARZ-REEL reliable?
The price and inventory of AD7669ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7669ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7669ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7669ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7669ARZ-REEL?
AD7669ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7669ARZ-REEL 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 AD7669ARZ-REEL?
For technical support, including AD7669ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7669ARZ-REEL requirements.
6.How does Aetrix verify that AD7669ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7669ARZ-REEL 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 AD7669ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7669ARZ-REEL?
All AD7669ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7669ARZ-REEL, 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 AD7669ARZ-REEL part is unused and in its original packaging.
Return procedure for AD7669ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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