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Analog Devices Inc. AD7669JRZ-REEL
- Part No.:
- AD7669JRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7669JRZ-REEL.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
AD7669JRZ-REEL from Analog Devices is a complete, monolithic 8-bit analog I/O system integrating a 2 µs successive-approximation ADC with track/hold, dual buffered DACs (VOUTA/VOUTB), on-chip 1.25 V bandgap reference, and fast 8-bit parallel microprocessor interface. It supports unipolar (0 to +1.25 V / 0 to +2.5 V) and bipolar (±1.25 V / ±2.5 V) ranges via RANGE/VSS control and operates from single +5 V or dual ±5 V supplies. Used in embedded data acquisition, industrial sensor interfacing, and closed-loop control systems requiring compact analog front-end integration.
For engineers reviewing the AD7669JRZ-REEL datasheet, AD7669JRZ-REEL pinout, AD7669JRZ-REEL application, or AD7669JRZ-REEL equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and validated alternative options - all grounded in Analog Devices' official REV. B specification and ordering guide.
Technical Context
The AD7669JRZ-REEL implements a mixed-signal LC2MOS architecture combining precision bipolar circuits for analog accuracy with low-power CMOS logic for digital control. Its ADC uses internal bandgap-referenced successive approximation with 200 kHz input bandwidth and 2 µs conversion time (external 5 MHz clock), while its dual DACs feature R-2R ladder networks with p-channel switching and output buffer amplifiers settling in ≤2 µs (±1/2 LSB).
Digital interface timing complies with standard 8-bit microprocessors: bus access/relinquish <75 ns, WR pulse width <80 ns, and asynchronous ST-triggered sampling. Range selection (via RANGE/VSS) simultaneously configures both ADC input and DAC output voltage spans and determines data coding (binary for VSS = 0 V; 2's complement for VSS = –5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - Enables 256 discrete analog levels per channel with guaranteed monotonicity. |
| ADC Conversion Time | 2 µs max (5 MHz external clock) - Supports up to 400 kSPS sampling without external timing circuitry. |
| DAC Settling Time | 2 µs max (±1/2 LSB, positive full-scale step) - Ensures stable output within one microprocessor bus cycle for real-time control. |
| Analog Voltage Ranges | Unipolar: 0 to +1.25 V / 0 to +2.5 V; Bipolar: ±1.25 V / ±2.5 V - Configurable via RANGE/VSS pins for flexible sensor/actuator interfacing. |
| Reference | On-chip 1.25 V bandgap - Eliminates external reference components and provides matched ADC/DAC scaling with <10 µV/°C tempco. |
| Supply Voltage | +4.75 V to +5.25 V (VDD); –4.75 V to –5.25 V (VSS, dual supply) - Compatible with standard ±5 V industrial power rails. |
| Power Consumption | 18 mA IDD (VDD), 6 mA ISS (VSS) - Optimized for low-noise analog operation without excessive thermal load in compact PCB layouts. |
Pinout & Package
AD7669JRZ-REEL is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package with 0.3 inch body width and gull-wing leads. The package meets JEDEC MS-012AC standards and supports surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply rail | Connects to +5 V ±5%; powers analog core, reference, and digital logic. |
| VSS | Negative supply rail | Ground (0 V) for unipolar mode or –5 V for bipolar mode; sets DAC/ADC data format. |
| AGNDDAC | Analog ground (DAC) | Separate return path for DAC output stage to minimize digital noise coupling into analog outputs. |
| AGNDADC | Analog ground (ADC) | Isolated return for ADC input stage to preserve SNR and reduce crosstalk from DAC switching. |
| DGND | Digital ground | Return for CS, RD, WR, A/B, RESET, DB0–DB7; must tie to AGNDs at single point. |
| VIN | ADC analog input | Accepts configured input range (e.g., ±2.5 V); high-impedance (>1 MΩ) with 10 pF capacitance. |
| VOUTA / VOUTB | Dual DAC buffered outputs | Independent voltage outputs with 2 kΩ load drive; each settles ≤2 µs to ±1/2 LSB. |
| RANGE | Range configuration input | Binary select (0/1) with VSS to determine full-scale span and data coding scheme. |
| CS | Chip select (active low) | Enables device communication; required before WR or RD assertion. |
| WR | Write strobe (rising edge) | Latches DB0–DB7 into selected DAC register (A/B controls DACA vs. DACB on AD7669). |
| RD | Read strobe (active low) | Outputs ADC result on DB0–DB7; triggers conversion in Mode 2 interface. |
| ST | Start conversion (falling edge) | Initiates ADC sampling independently of CS; enables precise timing control. |
| BUSY | Conversion status (active low) | Indicates ongoing ADC conversion; holds VIN signal during acquisition. |
| INT | Interrupt output (active low) | Signals ADC completion; cleared by rising edge of CS or RD, or RESET pulse. |
| A/B | DAC select (AD7669 only) | Low = write to DACA register; high = write to DACB register; no function on AD7569. |
| RESET | Asynchronous reset (active low) | Clears DAC registers to 0x00 and deasserts INT; sets VOUT to 0 V (unipolar) or –FS (bipolar). |
| DB0–DB7 | 8-bit bidirectional data bus | Transfers DAC data (write) or ADC result (read); TTL/CMOS compatible with 0.8 V/2.4 V thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent DAC outputs | VOUTA and VOUTB provide simultaneous, isolated analog generation with ≤2.5 LSB full-scale matching error. |
| Integrated bandgap reference | 1.25 V ±0.5% initial accuracy and <10 ppm/°C drift eliminates external reference and calibration. |
| Configurable unipolar/bipolar operation | Single RANGE/VSS combination sets both ADC input and DAC output spans and data coding format. |
| Microprocessor-optimized timing | Sub-80 ns WR pulse width and <75 ns bus relinquish enable direct connection to 8051, Z80, and 68K families. |
| Low-glitch DAC architecture | 15 nV·s glitch impulse ensures minimal transient disturbance during code transitions in sensitive control loops. |
Applications
| Industrial Sensor Signal Conditioning | Embedded Closed-Loop Motor Control |
|---|---|
Use Scenario: Interfacing thermocouples, RTDs, and strain gauges to an 8-bit microcontroller in factory automation PLC modules. IC Role / Device Role / Timing Role: ADC digitizes conditioned sensor voltage; dual DACs generate analog setpoints and feedback compensation signals. Use Value: Single-chip integration reduces BOM count by 4+ components (ref, op-amps, ADC, DAC) and eliminates inter-component gain/offset drift errors. |
Use Scenario: Real-time position/velocity regulation in stepper/servo drives using microcontroller-based PID algorithms. IC Role / Device Role / Timing Role: ADC samples motor current/voltage feedback; DACs output PWM-complementary analog references to gate drivers. Use Value: 2 µs ADC conversion and ≤2 µs DAC settling support 200 kHz control loop rates without external timing ICs. |
| Programmable Logic Controller (PLC) Analog I/O Module | Test & Measurement Equipment Front-End |
Use Scenario: Modular I/O card providing configurable analog inputs/outputs for DIN-rail mounted PLCs in harsh industrial environments. IC Role / Device Role / Timing Role: Dual DACs drive 4–20 mA transmitter circuits via external op-amps; ADC monitors fieldbus voltage/current levels. Use Value: Bipolar ±2.5 V range supports differential signaling; separate AGNDDAC/AGNDADC grounds suppress crosstalk in multi-channel designs. |
Use Scenario: Portable oscilloscope or waveform generator where space-constrained PCBs require high functional density. IC Role / Device Role / Timing Role: ADC captures signal under test; DACs reconstruct reference waveforms or calibrate internal offsets. Use Value: On-chip 1.25 V reference ensures consistent full-scale definition across ADC/DAC paths, improving measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel analog I/O applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7669AR | Same die, 28-pin SOIC package but non-tape-and-reel (bulk) and industrial temperature grade (–40°C to +85°C) vs. commercial (0°C to +70°C). | Identical electrical specs; differs only in packaging format and temp range certification. | Select AD7669AR if volume production requires bulk delivery or extended temperature operation beyond 70°C. |
| AD7669AN | Same die, 28-pin PDIP package (0.6" width); identical electrical performance but through-hole mounting and lower thermal dissipation capability. | Suitable for prototyping or legacy through-hole designs; not recommended for high-density SMT production. | Choose AD7669AN only for hand-soldered evaluation or legacy board compatibility - AD7669JRZ-REEL offers superior thermal and mechanical reliability in automated SMT lines. |
Compared with AD7669AR and AD7669AN, the AD7669JRZ-REEL provides tape-and-reel delivery optimized for pick-and-place assembly, commercial-grade temperature validation, and SOIC footprint compatibility with modern high-density PCB layouts - making it the preferred choice for volume SMT manufacturing.
Availability
AD7669JRZ-REEL is available at Aetrix Electronics and suitable for industrial sensor conditioning, embedded motor control, and programmable logic controller (PLC) analog I/O modules requiring stable component supply and long-term sourcing continuity.
Supply support for AD7669JRZ-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 AD7669JRZ-REEL belongs to Analog Devices' legacy LC2MOS analog I/O family, designed specifically for embedded microcontroller systems needing integrated, calibrated ADC/DAC functionality without external support components.
FAQ
What is the operating temperature range for the AD7669JRZ-REEL?
The AD7669JRZ-REEL is rated for commercial operation from 0°C to +70°C, as confirmed in the Analog Devices ordering guide (J-grade). This range applies to all electrical specifications unless otherwise noted in the REV. B datasheet. For extended temperature applications, consider the AD7669AR (–40°C to +85°C) or AD7669AN (0°C to +70°C, PDIP).
Does the AD7669JRZ-REEL require external components for basic operation?
No - the AD7669JRZ-REEL is a complete analog I/O system requiring no external reference, op-amps, or trimming components. Its on-chip 1.25 V bandgap reference, dual DAC output buffers, and track/hold amplifier enable full functionality with only decoupling capacitors (0.1 µF ceramic near VDD/VSS) and proper ground partitioning (AGNDDAC, AGNDADC, DGND).
How do I configure bipolar output ranges on the AD7669JRZ-REEL?
To configure bipolar output (±1.25 V or ±2.5 V), connect VSS to –5 V and set the RANGE pin to logic high (1) or low (0) respectively. This also configures the ADC input range and switches DAC/ADC data coding to 2's complement. The AD7669JRZ-REEL's internal reference and amplifier are fully characterized for bipolar operation per Table I in the datasheet.
What is the maximum sampling rate achievable with the AD7669JRZ-REEL ADC?
The AD7669JRZ-REEL ADC achieves a maximum sampling rate of 400 kSPS, derived from its 2 µs conversion time (including track/hold acquisition). This rate is validated with a 5 MHz external clock and full-scale 100 kHz sine wave input, meeting SNR ≥44 dB and THD ≤48 dB specifications per the REV. B datasheet.
Can the two DAC outputs (VOUTA/VOUTB) operate independently on the AD7669JRZ-REEL?
Yes - the AD7669JRZ-REEL supports fully independent control of VOUTA and VOUTB via the A/B pin. When A/B = low, WR pulses load data into the DACA register; when A/B = high, they load DACB. Each output has dedicated buffer amplifiers, ≤2.5 LSB full-scale matching error, and –70 dB isolation, enabling true dual-channel analog generation.
AD7669JRZ-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:
- Obsolete
- Applications:
- Analog I/O
- Interface:
- Bus
- Voltage - Supply:
- 4.75V ~ 5.25V
- Supplier Device Package:
- 28-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AD7669JRZ-REEL FAQ
1.How can I place an order for AD7669JRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7669JRZ-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 AD7669JRZ-REEL reliable?
The price and inventory of AD7669JRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7669JRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7669JRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7669JRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7669JRZ-REEL?
AD7669JRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7669JRZ-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 AD7669JRZ-REEL?
For technical support, including AD7669JRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7669JRZ-REEL requirements.
6.How does Aetrix verify that AD7669JRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7669JRZ-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 AD7669JRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7669JRZ-REEL?
All AD7669JRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7669JRZ-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 AD7669JRZ-REEL part is unused and in its original packaging.
Return procedure for AD7669JRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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