My Inquiry
My Account
Analog Devices Inc. AD7669JP-REEL
- Part No.:
- AD7669JP-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Specialized
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD7669JP-REEL.pdf
- Description:
- IC I/O PORT 8BIT ANLG 28-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7669JP-REEL from Analog Devices is a complete, 8-bit analog I/O system IC integrating dual DACs with output amplifiers, a 2 µs successive-approximation ADC with track/hold, on-chip 1.25 V bandgap reference, and fast 8-bit parallel microprocessor interface. It operates from single +5 V or dual ±5 V supplies and supports programmable unipolar (0 to +1.25 V / 0 to +2.5 V) and bipolar (±1.25 V / ±2.5 V) ranges - used in industrial data acquisition, closed-loop control, and waveform generation.
For engineers reviewing the AD7669JP-REEL datasheet, AD7669JP-REEL pinout, AD7669JP-REEL application, or AD7669JP-REEL equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts for embedded analog interface design, precision DAC matching, and mixed-signal system integration.
Technical Context
The AD7669JP-REEL implements a monolithic LC2MOS architecture combining precision bipolar DAC/ADC circuitry with low-power CMOS logic. Its dual DACs share one internal bandgap reference and feature matched full-scale error (±2.5 LSB max), while the ADC uses the same reference and supports external or internal clocking (2 µs max conversion time).
Digital interface timing complies with standard 8-bit microprocessors: bus access/relinquish <75 ns, WR pulse width <80 ns, and asynchronous ST-triggered sampling. The RANGE and VSS pins jointly configure both input and output voltage ranges and determine data coding (binary for VSS = 0 V; two's complement for VSS = –5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit for both ADC and dual DACs - enables 256-step quantization in control and measurement loops. |
| ADC Conversion Time | 2 µs maximum with 5 MHz external clock - supports up to 400 kSPS sampling without pipeline latency. |
| DAC Settling Time | 2 µs (positive full-scale change), 2 µs (bipolar negative full-scale) - ensures stable analog output within 1 µs typical for real-time updates. |
| Full-Scale Error (DAC) | ±3 LSB max at +25°C, ±4.5 LSB max over 0°C to +70°C - calibrated against internal 1.25 V reference, no external trimming required. |
| DAC-to-DAC Isolation | –70 dB maximum - prevents crosstalk between DACA and DACB outputs in dual-channel applications like differential signal generation. |
| Supply Voltage Range | +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. |
| Operating Temperature | 0°C to +70°C (J-grade) - qualified for commercial and light-industrial environments without derating. |
Pinout & Package
AD7669JP-REEL is housed in a 28-pin plastic leaded chip carrier (PLCC) package with 1.27 mm pitch, gull-wing leads, and exposed thermal pad (not electrically connected). Pin 1 marked by corner notch; body size 11.43 mm × 11.43 mm × 3.56 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply rail | +5 V main power for analog and digital sections; must be decoupled locally to AGNDDAC/AGNDADC. |
| VSS | Negative supply rail | 0 V (unipolar) or –5 V (bipolar); sets DAC/ADC range and determines data coding format. |
| RANGE | Range selection input | Combined with VSS to select 0–1.25 V, 0–2.5 V, ±1.25 V, or ±2.5 V - configures both DAC output and ADC input simultaneously. |
| RESET | Asynchronous reset | Active-low signal clearing DAC registers to 0x00 and deasserting INT; sets VOUTA/VOUTB to 0 V (unipolar) or –FS (bipolar). |
| CS | Chip select | Active-low enable for digital interface; gates RD/WR operations and disables outputs when high. |
| WR | Write strobe | Rising-edge triggered; latches DB7–DB0 into selected DAC register (A/B determines DACA or DACB on AD7669). |
| A/B | DAC select | High = write to DACB register; low = write to DACA register - enables independent dual-channel control. |
| RD | Read strobe | Active-low; initiates ADC data readout and drives BUSY/INT status - used in Mode 2 interface for auto-start conversion. |
| ST | Start conversion | Falling-edge triggered; starts ADC sampling independently of CS - provides precise timing control for track/hold capture. |
| BUSY | Conversion status | Active-low open-drain output indicating ongoing ADC conversion; synchronized to ST edge, not gated by CS. |
| 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 configured input range (e.g., ±2.5 V); referenced to AGNDADC - separate ground minimizes digital noise coupling. |
| VOUTA / VOUTB | DAC analog outputs | Buffered, rail-to-rail capable outputs; each drives 2 kΩ || 100 pF load with 1 µs typical settling - suitable for driving op-amp inputs or actuator interfaces. |
| AGNDDAC / AGNDADC | Analog ground returns | Separate dedicated grounds for DAC and ADC sections - critical for achieving specified SNR (44 dB min) and THD (48 dB max). |
| DGND | Digital ground | Return path for all logic signals; must connect to system digital ground plane - isolated from analog grounds except at single-point star. |
| DB0–DB7 | 8-bit bidirectional data bus | Parallel interface for DAC loading (write) and ADC result reading (read); TTL/CMOS-compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2.4 V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual DAC + ADC + reference | Eliminates need for external op-amps, references, or calibration components - reduces BOM count and layout area in compact systems. |
| Matched dual DAC full-scale error | ±2.5 LSB max mismatch between DACA and DACB - enables accurate differential output generation without external trimming. |
| Programmable unipolar/bipolar ranges | Single RANGE + VSS configuration controls both DAC output and ADC input - simplifies firmware handling of sensor/actuator polarity. |
| Fast microprocessor interface | Sub-80 ns WR pulse width and <75 ns bus relinquish - interoperable with 8051, Z80, and 68k families without wait states. |
| On-chip temperature-compensated reference | 1.25 V ±0.5% initial accuracy, 25 ppm/°C tempco - ensures stable full-scale across 0°C to +70°C without external reference IC. |
Applications
| Industrial Data Acquisition | Embedded Closed-Loop Control |
|---|---|
|
Use Scenario: Real-time monitoring of temperature, pressure, and flow sensors in PLC I/O modules. IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs; dual DACs generate calibrated feedback voltages for valve/actuator drivers. Use Value: Single-chip solution eliminates external reference drift errors and guarantees <±3 LSB total unadjusted error across 0°C to +70°C. |
Use Scenario: Motor position control in CNC motion controllers using encoder feedback and PWM drive modulation. IC Role / Device Role / Timing Role: ADC samples encoder analog interpolation signals; DACs output precise reference voltages to current-loop drivers. Use Value: Matched DACA/DACB full-scale error (±2.5 LSB) ensures consistent differential command signals for balanced torque output. |
| Waveform Generation | Test & Measurement Equipment |
|
Use Scenario: Arbitrary waveform generator in portable calibrators producing sine, triangle, and square waves up to 20 kHz. IC Role / Device Role / Timing Role: Dual DACs operate in synchronized update mode to generate differential output waveforms; ADC validates output integrity. Use Value: –70 dB DAC-to-DAC isolation prevents harmonic contamination between channels, preserving spectral purity per IEEE 1057. |
Use Scenario: Automated test equipment (ATE) performing parametric testing of analog components under varying bias conditions. IC Role / Device Role / Timing Role: DACs set precise DC bias voltages on DUT; ADC measures response with 2 µs conversion enabling rapid sweep sequences. Use Value: 400 kSPS effective sampling rate supports >100-point sweeps per second while maintaining <1 LSB linearity over full scale. |
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, SOIC-28 package (R-28), –40°C to +85°C operating range | Wider temperature range suits extended industrial environments; larger footprint than PLCC but better thermal dissipation | Select AD7669AR if board space allows SOIC and operation beyond +70°C is required. |
| AD7669JR | Same J-grade performance, SOIC-28 package (R-28), identical 0°C to +70°C range | SOIC offers easier rework and automated assembly vs. PLCC; same electrical specs and pinout | Choose AD7669JR for simplified SMT manufacturing where PLCC reflow profile is problematic. |
Compared with AD7669JP-REEL, AD7669AR extends temperature capability to –40°C but increases package height and thermal resistance; AD7669JR retains identical specs and grade while offering surface-mount compatibility and lower assembly cost in high-volume production.
Availability
AD7669JP-REEL is available at Aetrix Electronics and suitable for industrial data acquisition, embedded closed-loop control, and waveform generation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7669JP-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 AD7669 belongs to Analog Devices' legacy LC2MOS analog I/O family, designed specifically for embedded systems needing integrated, calibrated, and microprocessor-compatible analog signal conditioning without external support components.
FAQ
What is the function of the RANGE pin on the AD7669JP-REEL?
The RANGE pin on the AD7669JP-REEL, used in conjunction with VSS, selects the analog input and output voltage range: 0 to +1.25 V, 0 to +2.5 V, ±1.25 V, or ±2.5 V. It also determines the data coding format - binary when VSS = 0 V, two's complement when VSS = –5 V. This dual role ensures synchronized configuration of both ADC input and DAC output ranges in the AD7669JP-REEL.
Does the AD7669JP-REEL require an external reference voltage?
No, the AD7669JP-REEL does not require an external reference voltage. It integrates a temperature-compensated 1.25 V bandgap reference that serves both the 8-bit ADC and dual DACs. This internal reference provides ±0.5% initial accuracy and 25 ppm/°C temperature coefficient over 0°C to +70°C, eliminating external reference components and associated calibration in the AD7669JP-REEL design.
How are the two DACs in the AD7669JP-REEL controlled independently?
The two DACs in the AD7669JP-REEL are controlled independently via the A/B pin: when A/B is low, data written during a WR cycle is loaded into the DACA register; when A/B is high, the same data goes to DACB. Both DACs share the same DB7–DB0 bus and are updated synchronously only if A/B is toggled between writes - enabling precise, channel-specific updates in the AD7669JP-REEL.
What is the maximum sampling rate achievable with the AD7669JP-REEL ADC?
The AD7669JP-REEL ADC achieves a maximum sampling rate of 400 kSPS, derived from its 2 µs maximum conversion time. This rate is sustained using the internal clock or a 5 MHz external clock, and applies across all supported input ranges. The ADC's 44 dB minimum SNR and 48 dB maximum THD at 100 kHz input are specified at this 400 kSPS rate in the AD7669JP-REEL datasheet.
Can the AD7669JP-REEL operate from a single +5 V supply only?
Yes, the AD7669JP-REEL can operate from a single +5 V supply (VDD = +5 V, VSS = 0 V), supporting unipolar output ranges of 0 to +1.25 V or 0 to +2.5 V and corresponding ADC input ranges. In this configuration, data format is binary, and the DAC output amplifier maintains full sink capability above ~0.5 V - though near 0 V, passive pull-down limits current, as documented in the AD7669JP-REEL functional description.
AD7669JP-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LC²MOS
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- Analog I/O
- Interface:
- Bus
- Voltage - Supply:
- 4.75V ~ 5.25V
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AD7669JP-REEL FAQ
1.How can I place an order for AD7669JP-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7669JP-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 AD7669JP-REEL reliable?
The price and inventory of AD7669JP-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7669JP-REEL is usually 5 days.
3.What payment methods are accepted for AD7669JP-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7669JP-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7669JP-REEL?
AD7669JP-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7669JP-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 AD7669JP-REEL?
For technical support, including AD7669JP-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7669JP-REEL requirements.
6.How does Aetrix verify that AD7669JP-REEL is sourced from the original manufacturer or authorized distributors?
All AD7669JP-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 AD7669JP-REEL meets industry standards.
7.What is the process for return or replacement of AD7669JP-REEL?
All AD7669JP-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7669JP-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 AD7669JP-REEL part is unused and in its original packaging.
Return procedure for AD7669JP-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7669JP-REEL Tags
-
NVT4857UKAZ
NXP Semiconductors
-
TCA8418RTWR
Texas Instruments
-
PCA9546APWR
Texas Instruments
-
MD0100N8-G
Microchip Technology
-
PCA9548APW,118
NXP Semiconductors
-
PCA9540BDP,118
NXP Semiconductors
-
PCA9548APWR
Texas Instruments
-
PCA9546APW,118
NXP Semiconductors
-
PTN3360DBS,518
NXP Semiconductors
-
PCA9546ABS,118
NXP Semiconductors
-
PCA9518PWR
Texas Instruments
-
PCA9545APW,118
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
