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Analog Devices Inc. AD1674KR-REEL
- Part No.:
- AD1674KR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD1674KR-REEL.pdf
- Description:
- 12-BIT 100 KSPS A/D CONVERTER
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
AD1674KR-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 microprocessor-compatible 8-/12-bit parallel interface. It supports unipolar (0 V–10 V, 0 V–20 V) and bipolar (±5 V, ±10 V) input ranges, operates on ±12 V/±15 V analog and +5 V digital supplies, and delivers ±1/2 LSB integral nonlinearity at 0°C to +70°C - used in precision data acquisition systems for industrial process monitoring.
For engineers reviewing the AD1674KR-REEL datasheet, AD1674KR-REEL pinout, AD1674KR-REEL application, or AD1674KR-REEL equivalent, this page provides verified technical context, real-world timing behavior, confirmed input range configuration logic, and validated alternative options for legacy ADC replacement in embedded measurement systems.
Technical Context
The AD1674KR-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 DAC uses weighted current sources and 5 kΩ scaling resistors to maintain 1 mA full-scale current across both 10 V and 20 V input spans.
Control logic enables two operational modes: full-control mode (using CE, CS, R/C, 12/8, A0) for multiplexed bus systems, and stand-alone mode (R/C edge-triggered, CE/12/8 tied high) for dedicated channel applications - with STS output indicating conversion status and three-state buffers enabling direct 8- or 12-bit microprocessor read access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with no missing codes guaranteed. |
| 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. |
| INL | ±1/2 LSB - ensures monotonicity and ≤0.012% full-scale linearity error over temperature, critical for calibration-sensitive instrumentation. |
| S/(N+D) | 70 dB - measured at 10 kHz input, supporting high-fidelity signal reconstruction in audio and sensor conditioning applications. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - selectable via BIP OFF and REF IN connections without external scaling components. |
| Supply Voltages | +5 V (VLOGIC), ±12 V or ±15 V (VCC/VEE) - dual-supply operation enables true bipolar analog signal handling. |
| Package | 28-pin plastic SOIC (R-28) - surface-mount compatible with automated PCB assembly and thermal performance suitable for commercial-grade environments. |
Pinout & Package
AD1674KR-REEL is housed in a 28-pin plastic SOIC (R-28) package with standard 0.3-inch body width and 0.050-inch lead pitch. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Digital power supply | +5 V logic rail; powers internal registers and output buffers - must be decoupled locally to suppress switching noise coupling into analog section. |
| 12/8 (Pin 2) | Digital control input | Selects output format: HIGH = 12-bit parallel word; LOW = two 8-bit nibbles - enables compatibility with 8-bit microcontrollers without glue logic. |
| CS (Pin 3) | Digital control input | Active-low chip select; enables conversion or read when CE is also asserted - used for address decoding in multi-device bus systems. |
| A0 (Pin 4) | Digital control input | Byte address/short cycle control: LOW initiates 12-bit conversion; HIGH initiates 8-bit conversion - also selects MSB/LSB byte during read operations. |
| R/C (Pin 5) | Digital control input | Read/Convert mode selector: LOW starts conversion in full-control mode; falling edge triggers conversion in stand-alone mode - defines primary timing event for acquisition. |
| CE (Pin 6) | Digital control input | Active-high chip enable; initiates operation when CS is low and R/C state is defined - synchronizes internal clock and SAR reset sequence. |
| VCC (Pin 7) | Analog power supply | +12 V or +15 V analog supply; powers SHA, comparator, and DAC - requires low-noise regulation and separate analog ground plane. |
| REF OUT (Pin 8) | Analog output | +10 V reference source; drives BIP OFF and REF IN through 50 Ω resistor for bipolar offset calibration - output current limited to 2 mA. |
| AGND (Pin 9) | Analog ground | Analog common reference; must be isolated from DGND except at single-point star ground to prevent digital noise injection into SHA path. |
| REF IN (Pin 10) | Analog input | Reference input node; connected to REF OUT via 50 Ω resistor for internal reference use - open or misconnected causes full-scale error >0.25% FSR. |
| VEE (Pin 11) | Analog power supply | –12 V or –15 V analog supply; powers negative side of SHA and comparator - shares same noise sensitivity requirements as VCC. |
| BIP OFF (Pin 12) | Analog input | Bipolar offset adjustment node; tied to REF OUT via 50 Ω for ±5 V/±10 V operation, or to AGND for unipolar 0–10 V/0–20 V mode. |
| 10 VIN (Pin 13) | Analog input | 10 V span input: accepts 0–10 V unipolar or ±5 V bipolar signals - unused in 20 V span configurations to avoid crosstalk and gain error. |
| 20 VIN (Pin 14) | Analog input | 20 V span input: accepts 0–20 V unipolar or ±10 V bipolar signals - unused in 10 V span configurations to preserve accuracy and input impedance. |
| DGND (Pin 15) | Digital ground | Digital common reference; connects to system digital ground plane - separation from AGND prevents ground bounce from corrupting conversion integrity. |
| DB0–DB3 (Pins 16–19) | Digital output | Least-significant 4 bits; enabled only when A0 = HIGH and 12/8 = LOW - outputs 4 LSBs followed by four trailing zeroes in 8-bit mode. |
| DB4–DB7 (Pins 20–23) | Digital output | Middle 4 bits; enabled when A0 = LOW in 12-bit mode or 8-bit mode - provides DB4–DB7 as upper nibble of first 8-bit word when 12/8 = LOW. |
| DB8–DB11 (Pins 24–27) | Digital output | Most-significant 4 bits; always active in 12-bit mode; enabled when A0 = LOW in 8-bit mode - forms upper nibble of second 8-bit word when 12/8 = LOW. |
| STS (Pin 28) | Digital output | Status flag: HIGH during conversion, LOW when data is valid - used for polling or interrupt-driven read synchronization with ≤1 µs delay after data validity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample-and-Hold Amplifier | Supports full Nyquist bandwidth (500 kHz linear, 1 MHz full-power); acquisition time ≤1 µs eliminates external SHA and reduces board space/cost. |
| Factory-Calibrated Input Ranges | Four laser-trimmed ranges (±5 V, ±10 V, 0–10 V, 0–20 V) require no external resistors or calibration - reduces design cycle time and field recalibration needs. |
| AC + DC Performance Guarantee | Specified S/(N+D) = 70 dB and THD = –90 dB alongside dc parameters (INL, offset, full-scale error) - enables single-part qualification for both signal analysis and precision measurement. |
| Flexible Microprocessor Interface | Configurable 8-/12-bit parallel output with three-state buffers allows direct connection to 8-bit or 16-bit buses - eliminates need for external latches or level shifters. |
| Industry-Standard Pinout Compatibility | Pins match AD574A/AD674A layout - permits drop-in replacement in legacy designs without PCB rework or firmware changes. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Continuous voltage/current sensing from PLC analog I/O modules feeding real-time control algorithms. IC Role / Device Role / Timing Role: Primary ADC capturing sensor outputs at 100 kSPS with ±1/2 LSB linearity to support closed-loop PID tuning accuracy. Use Value: Eliminates external scaling and calibration circuitry while maintaining <0.012% full-scale error across 0°C to +70°C operating range. |
Use Scenario: Digitizing waveform inputs in benchtop oscilloscopes and spectrum analyzers requiring high dynamic range. IC Role / Device Role / Timing Role: Stand-alone mode operation with R/C edge triggering minimizes aperture jitter (<250 ps), preserving SNR in frequency-domain analysis. Use Value: 70 dB S/(N+D) and –90 dB THD at 10 kHz enable accurate harmonic distortion measurement without post-processing correction. |
| Medical Instrumentation | Avionics Data Acquisition |
|
Use Scenario: Biopotential signal digitization (ECG, EEG) where low-offset drift and calibrated bipolar input ranges are mandatory. IC Role / Device Role / Timing Role: Bipolar ±5 V input mode with BIP OFF tied to REF OUT delivers zero-adjustable offset and <±4 LSB bipolar offset drift over temperature. Use Value: Factory-trimmed scaling resistors ensure consistent gain matching across production units, reducing per-unit calibration labor. |
Use Scenario: Engine parameter monitoring (temperature, pressure, RPM) in certified avionics subsystems requiring MIL-qualified alternatives. IC Role / Device Role / Timing Role: Used in commercial-grade variants (K grade) as functional baseline before upgrading to AD1674T for –55°C to +125°C operation. Use Value: Same pinout and timing as AD574A enables reuse of existing qualification test fixtures and flight software drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1674JR-REEL | Same SOIC-28 package and 0°C to +70°C rating, but ±1 LSB INL (vs. ±1/2 LSB for AD1674KR-REEL). | Acceptable for cost-sensitive industrial DAQ where 12-bit monotonicity suffices but sub-LSB linearity is not required. | Select AD1674JR-REEL when budget constraints outweigh need for highest dc accuracy; retains identical timing, pinout, and interface logic. |
| AD7892BRZ | 12-bit, 200 kSPS SAR ADC in 24-pin SOIC; no internal SHA or reference; requires external 2.5 V reference and external sample control. | Used in higher-speed, lower-power portable instruments where system-level SHA integration is feasible and board space is constrained. | Choose AD7892BRZ only if redesign accommodates external SHA and reference - not a drop-in replacement due to different pin count, supply scheme, and control protocol. |
Compared with AD1674JR-REEL, the AD1674KR-REEL offers tighter dc accuracy for calibration-critical systems; compared with AD7892BRZ, it trades speed and power efficiency for complete signal-chain integration - making it optimal for legacy-replacement and space-constrained industrial designs needing minimal external components.
Availability
AD1674KR-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, test equipment development, medical instrumentation, and avionics data acquisition requiring stable component supply and long-term obsolescence management.
Supply support for AD1674KR-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 healthcare markets since 1965.
The AD1674 product line was designed as a pin-compatible, performance-enhanced successor to the AD574A - delivering integrated sample-and-hold and guaranteed ac/dc specifications for precision data acquisition in harsh, real-world environments.
FAQ
What is the maximum sampling rate of the AD1674KR-REEL?
The AD1674KR-REEL achieves a guaranteed 100 kSPS conversion rate with 10 µs total conversion time for 12-bit cycles. This rate is maintained across its full operating temperature range (0°C to +70°C) and under all specified supply conditions (+5 V, ±12 V). The device does not support oversampling or variable-rate modes - its timing is fixed by internal clock generation.
Does the AD1674KR-REEL require external components for basic operation?
The AD1674KR-REEL requires only three external components for minimum functional operation: a 50 Ω resistor between REF OUT and BIP OFF (for bipolar mode) or AGND (for unipolar mode), a 50 Ω resistor between REF OUT and REF IN, and local bypass capacitors on VCC, VEE, and VLOGIC. No external clock, reference, or sample-and-hold amplifier is needed - all are integrated.
How does the AD1674KR-REEL handle bipolar versus unipolar input configurations?
The AD1674KR-REEL selects input range via hardware connections: tie BIP OFF to REF OUT through 50 Ω for ±5 V or ±10 V bipolar operation; tie BIP OFF to AGND for 0–10 V or 0–20 V unipolar operation. The 10 VIN and 20 VIN pins are mutually exclusive - only one should be connected, depending on selected span, to avoid gain error and crosstalk.
Is the AD1674KR-REEL pin-compatible with the AD574A?
Yes, the AD1674KR-REEL uses the exact same 28-pin SOIC footprint and pin assignments as the AD574A, including identical locations for VCC, VEE, AGND, DGND, REF IN, REF OUT, CS, CE, R/C, 12/8, A0, STS, and all DBx lines. This enables direct PCB-level replacement without layout modification or signal routing changes.
What are the power supply requirements for the AD1674KR-REEL?
The AD1674KR-REEL requires three independent supplies: +5 V (VLOGIC, ±10%), +12 V or +15 V (VCC, ±10% or ±5%), and –12 V or –15 V (VEE, ±10% or ±5%). Total power dissipation is 385–575 mW depending on supply voltages and conversion activity. Separate analog and digital ground planes with single-point connection are mandatory for specified performance.
AD1674KR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD1674KR-REEL FAQ
1.How can I place an order for AD1674KR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674KR-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 AD1674KR-REEL reliable?
The price and inventory of AD1674KR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674KR-REEL is usually 5 days.
3.What payment methods are accepted for AD1674KR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674KR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674KR-REEL?
AD1674KR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674KR-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 AD1674KR-REEL?
For technical support, including AD1674KR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674KR-REEL requirements.
6.How does Aetrix verify that AD1674KR-REEL is sourced from the original manufacturer or authorized distributors?
All AD1674KR-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 AD1674KR-REEL meets industry standards.
7.What is the process for return or replacement of AD1674KR-REEL?
All AD1674KR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1674KR-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 AD1674KR-REEL part is unused and in its original packaging.
Return procedure for AD1674KR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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