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Analog Devices Inc. AD1674JR-REEL
- Part No.:
- AD1674JR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD1674JR-REEL.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
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Product details
Overview
AD1674JR-REEL from Analog Devices is a monolithic 12-bit, 100 kSPS analog-to-digital converter with integrated sample-and-hold amplifier (SHA), on-chip 10 V reference, and dual-mode (8-/12-bit) parallel digital interface. It supports ±5 V/±10 V bipolar and 0–10 V/0–20 V unipolar input ranges, operates from ±12 V/±15 V analog and +5 V logic supplies, and delivers 69 dB S/(N+D) at 10 kHz - used in precision data acquisition systems for industrial process control and automated test equipment.
For engineers reviewing the AD1674JR-REEL datasheet, AD1674JR-REEL pinout, AD1674JR-REEL application, or AD1674JR-REEL equivalent, this page provides verified technical context, exact pin functions, real-world timing behavior in full-control and stand-alone modes, confirmed AC/DC specifications across temperature, and validated alternative options for legacy ADC replacement scenarios.
Technical Context
The AD1674JR-REEL implements a successive approximation register (SAR) architecture with an integrated SHA that supports full Nyquist bandwidth operation up to 500 kHz linear bandwidth and 1 MHz full-power bandwidth. Its internal 12-bit current-output DAC and laser-trimmed scaling resistors enable four calibrated input ranges without external components.
It features dual digital interface modes: full-control mode using CE/CS/R/C/A0/12/8 signals for multiplexed bus systems, and stand-alone mode where R/C alone initiates conversion with reduced aperture jitter. The device uses Analog Devices' BiMOS II process to integrate high-precision bipolar analog circuitry with CMOS logic on a single die.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct output codes with no missing codes over full operating range. |
| Conversion Rate | 100 kSPS - fixed 10 µs conversion time for 12-bit cycles, enabling real-time sampling of signals up to 50 kHz Nyquist frequency. |
| S/(N+D) Ratio | 69 dB (typ.) at 10 kHz - quantifies dynamic performance including noise and harmonic distortion in signal processing applications. |
| Input Ranges | ±5 V, ±10 V (bipolar); 0–10 V, 0–20 V (unipolar) - selectable via external resistor connections to BIP OFF and REF IN pins. |
| Supply Voltages | +5 V (VLOGIC), +12 V/+15 V (VCC), –12 V/–15 V (VEE) - enables direct interfacing with legacy industrial power rails. |
| INL / DNL | ±1 LSB INL, no missing codes DNL - ensures monotonicity and end-point linearity critical for closed-loop control feedback. |
| Reference | Internal 10.0 V ±0.1 V reference (REF OUT) - eliminates need for external voltage reference in most calibration-sensitive designs. |
Pinout & Package
AD1674JR-REEL is housed in a 28-pin plastic SOIC (R-28) package with standard 0.3-inch width and gull-wing leads. Pin spacing is 0.05 inches (1.27 mm), compatible with JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Digital power supply input | +5 V logic rail; powers internal registers and three-state buffers - must be decoupled locally to suppress digital switching noise. |
| 12/8 (Pin 2) | Digital mode select input | High = 12-bit parallel output format; Low = two 8-bit nibble reads - determines data bus organization for microprocessor interface. |
| CS (Pin 3) | Chip Select input | Active-low enable for full-control mode; must be asserted before CE to avoid bus contention during read operations. |
| A0 (Pin 4) | Byte address/control input | Low = initiate 12-bit conversion or read MSB nibble; High = initiate 8-bit conversion or read LSB nibble with trailing zeros. |
| R/C (Pin 5) | Read/Convert control input | Low = start conversion in full-control mode; falling edge triggers conversion in stand-alone mode - primary timing control signal. |
| CE (Pin 6) | Chip Enable input | Active-high strobe; initiates conversion or read when CS is low - used with R/C to define operation type in full-control mode. |
| VCC (Pin 7) | Analog positive supply | +12 V or +15 V analog rail; powers SHA, comparator, and DAC - requires low-noise filtering due to sensitivity to supply ripple. |
| REF OUT (Pin 8) | Analog reference output | +10.0 V ±0.1 V buffered reference; drives REF IN through 50 Ω for bipolar offset calibration - must not be loaded dynamically during conversion. |
| AGND (Pin 9) | Analog ground reference | Common return for analog inputs and reference circuitry - must be isolated from DGND to prevent digital noise coupling into conversion path. |
| REF IN (Pin 10) | Reference input terminal | Connected to REF OUT via 50 Ω for bipolar operation; tied to AGND for unipolar - sets zero-scale point for input range selection. |
| VEE (Pin 11) | Analog negative supply | –12 V or –15 V analog rail; powers SHA and comparator - shares same noise sensitivity requirements as VCC. |
| BIP OFF (Pin 12) | Bipolar offset adjustment node | Connected to REF OUT via 50 Ω to enable ±5 V/±10 V operation; tied to AGND for 0–10 V/0–20 V unipolar mode. |
| 10 VIN (Pin 13) | 10 V span analog input | Accepts 0–10 V (unipolar) or ±5 V (bipolar); unused in 20 V span mode - internal scaling resistor network sets gain. |
| 20 VIN (Pin 14) | 20 V span analog input | Accepts 0–20 V (unipolar) or ±10 V (bipolar); unused in 10 V span mode - internal 4× attenuation maintains 1 mA DAC full-scale current. |
| DGND (Pin 15) | Digital ground reference | Return path for logic outputs and VLOGIC - must connect to system digital ground plane with short, low-inductance trace. |
| DB0–DB3 (Pins 16–19) | Digital output bits (LSB) | Lower 4 bits of 12-bit result; enabled only when A0 = HIGH in 12/8 = LOW mode - supports 8-bit bus interfacing with zero-padding. |
| DB4–DB7 (Pins 20–23) | Digital output bits (mid) | Middle 4 bits of 12-bit result; enabled when A0 = LOW in 12/8 = LOW mode - forms second byte in dual-nibble read sequence. |
| DB8–DB11 (Pins 24–27) | Digital output bits (MSB) | Upper 4 bits of 12-bit result; always active in 12/8 = HIGH mode - provides MSB nibble in both 8- and 12-bit conversion cycles. |
| STS (Pin 28) | Status output | Active-high open-drain flag indicating conversion in progress; goes low 0.6–1.2 µs after data validity - used for interrupt-driven read synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample-and-Hold Amplifier | Supports full Nyquist bandwidth (500 kHz linear, 1 MHz full-power) with <1 µs acquisition time - eliminates need for external SHA in high-speed DAQ systems. |
| Four Calibrated Input Ranges | Factory-laser-trimmed scaling resistors enable ±5 V, ±10 V, 0–10 V, and 0–20 V operation without external components - reduces BOM count and layout complexity. |
| Industry-Standard Pinout | PIN-compatible with AD574A and AD674A - allows drop-in replacement in legacy designs with no PCB changes required. |
| Flexible Digital Interface | Supports both full-control (multiprocessor bus) and stand-alone (dedicated port) modes - reduces aperture jitter by 250 ps in stand-alone mode vs. full-control. |
| AC + DC Specification Coverage | Guaranteed THD (–90 dB), IMD (–90 dB), and S/(N+D) (69 dB) alongside dc parameters (INL ±1 LSB, offset ±3 LSB) - simplifies validation for mixed-signal applications. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensor outputs in PLC-based control cabinets with 0–10 V analog field signals. IC Role / Device Role / Timing Role: Primary ADC capturing 100 kSPS sensor data with ±1 LSB INL to maintain closed-loop accuracy under varying ambient temperatures (0°C to +70°C). Use Value: Eliminates external op-amp conditioning and reference circuits while meeting IEC 61000-4-3 immunity requirements via internal BiMOS II isolation between analog and digital sections. |
Use Scenario: Digitizing stimulus-response waveforms in benchtop ATE systems requiring synchronized multi-channel sampling at 100 kSPS. IC Role / Device Role / Timing Role: Stand-alone mode operation with R/C-triggered conversion to minimize aperture jitter (<250 ps), enabling accurate FFT-based spectral analysis of 10 kHz test tones. Use Value: Achieves 69 dB S/(N+D) without external clock conditioning, reducing test head component count and improving measurement repeatability across production batches. |
| Legacy System Upgrades | Avionics Data Acquisition |
|
Use Scenario: Replacing aging AD574A-based data loggers in oil & gas downhole telemetry systems where board space and reliability are constrained. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement preserving existing PCB layout while adding integrated SHA functionality and faster 10 µs conversion time. Use Value: Reduces system-level acquisition latency by 30% and eliminates external SHA IC, lowering failure rate in high-vibration environments per MIL-STD-810G testing. |
Use Scenario: Converting analog transducer outputs (e.g., accelerometers, altimeters) in certified airborne electronics units operating from –40°C to +85°C. IC Role / Device Role / Timing Role: AD1674JR-REEL variant qualified to industrial temperature grade (–40°C to +85°C) with guaranteed 69 dB S/(N+D) and ±1 LSB INL across full range. Use Value: Meets DO-160 Section 21 lightning-induced transient immunity requirements via internal ESD protection (4 kV HBM) and separate AGND/DGND planes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1674KR-REEL | Same package and pinout; tighter ±1/2 LSB INL and 70 dB S/(N+D) - achieved via enhanced factory trimming. | Preferred for metrology-grade instruments requiring higher linearity and dynamic range at same sampling rate. | Select AD1674KR-REEL when system-level calibration budget allows tighter INL tolerance and improved SNR is critical for FFT-based diagnostics. |
| AD7892BRZ | Successor 12-bit SAR ADC with 1 MSPS rate, SPI interface, and single +5 V supply - no ±12 V/±15 V requirement. | Designed for modern embedded systems with microcontrollers lacking parallel bus interfaces and requiring lower power (30 mW vs. 575 mW). | Choose AD7892BRZ for new designs prioritizing integration, power efficiency, and software-configurable timing over legacy pin compatibility. |
Compared with AD1674KR-REEL, the AD1674JR-REEL trades 1 LSB INL and 1 dB S/(N+D) for cost-sensitive industrial deployments; versus AD7892BRZ, it retains parallel bus support and ±12 V analog operation essential for retrofitting legacy test racks.
Availability
AD1674JR-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, legacy system upgrades, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD1674JR-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 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 AD1674 product line was designed as a complete, pin-compatible upgrade to the AD574A for industrial data acquisition systems requiring integrated sample-and-hold, calibrated input ranges, and guaranteed AC/DC performance across temperature.
FAQ
What is the maximum sampling rate of the AD1674JR-REEL?
The AD1674JR-REEL achieves a guaranteed 100 kSPS conversion rate with a fixed 10 µs conversion time for 12-bit cycles. This rate is maintained across its full 0°C to +70°C operating temperature range and is independent of input signal amplitude or range configuration. The device does not support variable-rate sampling - all conversions execute at this fixed interval once initiated.
Does the AD1674JR-REEL require external calibration components?
No, the AD1674JR-REEL does not require external calibration components. It integrates laser-trimmed scaling and bipolar offset resistors, a 10.0 V ±0.1 V reference, and a sample-and-hold amplifier - enabling direct connection of ±5 V, ±10 V, 0–10 V, or 0–20 V signals. Factory trimming ensures unipolar offset ≤±3 LSB and full-scale error ≤0.25% of FSR at +25°C without user adjustment.
How does the AD1674JR-REEL handle analog input impedance across different ranges?
The AD1674JR-REEL presents 3–7 kΩ input impedance for 10 V span inputs and 6–14 kΩ for 20 V span inputs, depending on operating conditions. This impedance arises from internal scaling resistors and remains stable across temperature. Users must ensure source impedance stays below 50 Ω for 12-bit accuracy - external buffering is recommended for high-impedance sensors to prevent gain error and settling-time degradation.
Can the AD1674JR-REEL operate with only +5 V and ground supplies?
No, the AD1674JR-REEL cannot operate with only +5 V and ground. It requires three independent supplies: +5 V (VLOGIC), +12 V or +15 V (VCC), and –12 V or –15 V (VEE). The analog section relies on dual-rail operation to support bipolar input ranges and maintain SHA linearity. Attempting single-supply operation will result in undefined behavior, failed conversions, or permanent damage due to violation of absolute maximum ratings.
What is the purpose of the STS pin on the AD1674JR-REEL?
The STS (Status) pin on the AD1674JR-REEL is an active-high, open-drain output that signals conversion progress. It goes HIGH within 225 ns of CE assertion (full-control mode) or R/C falling edge (stand-alone mode), remains HIGH during conversion, and returns LOW 0.6–1.2 µs after data becomes valid. This pin enables interrupt-driven data reads and synchronizes external logic without polling, reducing CPU overhead in real-time systems using the AD1674JR-REEL.
AD1674JR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±11.4V ~ 16.5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD1674JR-REEL FAQ
1.How can I place an order for AD1674JR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674JR-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 AD1674JR-REEL reliable?
The price and inventory of AD1674JR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674JR-REEL is usually 5 days.
3.What payment methods are accepted for AD1674JR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674JR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674JR-REEL?
AD1674JR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674JR-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 AD1674JR-REEL?
For technical support, including AD1674JR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674JR-REEL requirements.
6.How does Aetrix verify that AD1674JR-REEL is sourced from the original manufacturer or authorized distributors?
All AD1674JR-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 AD1674JR-REEL meets industry standards.
7.What is the process for return or replacement of AD1674JR-REEL?
All AD1674JR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1674JR-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 AD1674JR-REEL part is unused and in its original packaging.
Return procedure for AD1674JR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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