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Analog Devices Inc. AD1674KN
- Part No.:
- AD1674KN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AD1674KN.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
AD1674KN from Analog Devices is a complete monolithic 12-bit, 100 kSPS analog-to-digital converter with integrated sample-and-hold amplifier (SHA), on-chip 10 V reference, and three-state parallel output buffers. 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. It is used in precision data acquisition systems requiring DC accuracy and AC performance.
For engineers reviewing the AD1674KN datasheet, AD1674KN pinout, AD1674KN application, or AD1674KN equivalent, this page provides verified technical context, confirmed pin functions, real-world use scenarios, and validated alternative options for industrial measurement, test equipment, and embedded signal processing designs.
Technical Context
The AD1674KN implements a successive approximation register (SAR) architecture with an integrated SHA that supports full Nyquist bandwidth operation up to 1 MHz. Its internal 10 V reference is laser-trimmed and stable across temperature, enabling calibrated input ranges without external components.
Digital interface logic supports both full-control mode (using CE, CS, R/C, A0, and 12/8) and stand-alone mode (R/C-triggered), with configurable 8-bit or 12-bit conversion cycles and parallel output formatting. The device uses Analog Devices' BiMOS II process to integrate high-precision bipolar analog circuitry with CMOS digital logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity digitization. |
| Sampling Rate | 100 kSPS - enables real-time capture of signals up to 50 kHz (Nyquist-limited). |
| INL | ±1/2 LSB - ensures monotonicity and ≤0.012% full-scale linearity error over temperature. |
| S/(N+D) Ratio | 70 dB - guarantees ≥11.6 effective bits of dynamic resolution at 10 kHz input. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - eliminates need for external scaling resistors in most sensor interfaces. |
| Reference Voltage | 10.0 V ±100 mV - internally generated, buffered, and stable for repeatable calibration. |
| Power Supplies | +5 V (logic), ±12 V or ±15 V (analog) - supports legacy industrial power architectures. |
Pinout & Package
AD1674KN is supplied in a 28-pin plastic DIP (N-28) package with 0.6-inch width and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Digital supply input | Accepts +4.5 V to +5.5 V; powers internal logic and output buffers. |
| 12/8 (Pin 2) | Digital control input | Selects 12-bit word (HIGH) or two 8-bit bytes (LOW) output format. |
| CS (Pin 3) | Chip select input | Active LOW; enables device for conversion or read when CE is HIGH. |
| A0 (Pin 4) | Byte address input | Controls 12-bit vs. 8-bit conversion cycle and selects MSB/LSB byte during read. |
| R/C (Pin 5) | Read/Convert control | LOW initiates conversion; HIGH enables data read in full-control mode. |
| CE (Pin 6) | Chip enable input | Active HIGH; initiates operation when CS is LOW and R/C state is defined. |
| VCC (Pin 7) | Positive analog supply | Accepts +11.4 V to +16.5 V; powers SHA, reference, and analog core. |
| REF OUT (Pin 8) | Analog reference output | Provides +10 V ±100 mV; can drive external circuits with ≤2 mA load. |
| AGND (Pin 9) | Analog ground | Reference node for analog inputs and internal circuitry; must be isolated from DGND. |
| REF IN (Pin 10) | Reference input | Connected via 50 Ω resistor to REF OUT for internal reference use. |
| VEE (Pin 11) | Negative analog supply | Accepts –16.5 V to –11.4 V; required for bipolar input operation. |
| BIP OFF (Pin 12) | Bipolar offset adjust | Connected via 50 Ω to REF OUT to enable ±5 V or ±10 V modes. |
| 10 VIN (Pin 13) | 10 V span analog input | Accepts 0–10 V (unipolar) or ±5 V (bipolar); unused in 20 V mode. |
| 20 VIN (Pin 14) | 20 V span analog input | Accepts 0–20 V (unipolar) or ±10 V (bipolar); unused in 10 V mode. |
| DGND (Pin 15) | Digital ground | Reference for logic I/O; must be connected to system digital ground plane. |
| DB0–DB3 (Pins 16–19) | Digital output (LSB) | Output lower 4 bits in 12-bit mode; or 4 LSB + 4 trailing zeros in 8-bit mode. |
| DB4–DB7 (Pins 20–23) | Digital output (mid) | Output middle 4 bits in 12-bit mode; zeroed when A0 = HIGH in 8-bit mode. |
| DB8–DB11 (Pins 24–27) | Digital output (MSB) | Output upper 4 bits in 12-bit mode; enabled only when A0 = LOW in 8-bit mode. |
| STS (Pin 28) | Status output | Active HIGH during conversion; goes LOW 1 µs after data is valid. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated sample-and-hold amplifier | Supports full Nyquist bandwidth (1 MHz) with <1 µs acquisition time-no external SHA needed. |
| Factory-calibrated input ranges | Four laser-trimmed ranges (±5 V, ±10 V, 0–10 V, 0–20 V) eliminate external scaling and trimming. |
| AC and DC specifications guaranteed | 70 dB S/(N+D), ±1/2 LSB INL, and full-scale error <0.25%-validated for both signal integrity and precision measurement. |
| Flexible microprocessor interface | Configurable 8-/12-bit cycles and dual-byte or single-word output-directly compatible with 8-bit and 16-bit buses. |
| Industry-standard pinout | PIN-compatible with AD574A and AD674A-enables drop-in replacement in legacy designs. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog signals at 10–100 kSPS with DC stability and low drift. Use Value: ±1/2 LSB INL and ±2 LSB unipolar offset drift ensure long-term calibration stability without field recalibration. | Use Scenario: Digitizing stimulus-response waveforms in benchtop functional testers for mixed-signal IC validation. IC Role / Device Role / Timing Role: High-fidelity acquisition engine capturing transient responses with 70 dB S/(N+D) at 10 kHz. Use Value: Integrated SHA and 1 µs acquisition time enable accurate sampling of fast-rising edges without external hold circuitry. |
| Medical Instrumentation | Avionics Data Acquisition |
Use Scenario: ECG and patient vital sign digitization in portable diagnostic devices requiring low power and high linearity. IC Role / Device Role / Timing Role: Precision front-end ADC converting amplified biopotential signals with ±5 V input range. Use Value: Bipolar offset <±4 LSB and THD ≤–90 dB preserve waveform fidelity critical for arrhythmia detection. | Use Scenario: Sensor data logging in flight control systems where reliability across –55°C to +125°C is mandatory. IC Role / Device Role / Timing Role: Ruggedized ADC interfacing with accelerometers and gyros in MIL-STD-883-compliant modules. Use Value: AD1674KN's N-28 plastic DIP variant shares layout compatibility with higher-grade versions-simplifying design reuse. |
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 |
|---|---|---|---|
| AD1674JR | Same architecture and pinout; ±1 LSB INL (vs. ±1/2 LSB), 69 dB S/(N+D) (vs. 70 dB), plastic SOIC package. | Lower linearity and SNR; preferred where board space is constrained and SOIC footprint is required. | Select AD1674JR if SOIC packaging and cost reduction outweigh the need for highest DC/AC performance. |
| AD7892BR | 12-bit, 100 kSPS SAR ADC with internal reference; no integrated SHA; 24-pin SOIC; ±1 LSB INL; 70 dB S/(N+D). | Requires external SHA for wideband signals; lacks bipolar input support and industry-standard pinout. | Choose AD7892BR only when compact size and simplified supply (single +5 V) are prioritized over bipolar range and legacy compatibility. |
Compared with AD1674JR, AD1674KN offers tighter DC accuracy and better dynamic performance in the same DIP package; compared with AD7892BR, it provides integrated SHA, bipolar input capability, and AD574A-compatible pinout-making it superior for retrofitting and wideband measurement.
Availability
AD1674KN is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AD1674KN 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.
The AD1674 series 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 demanding environments.
FAQ
What is the operating temperature range of the AD1674KN?
The AD1674KN is specified for operation from 0°C to +70°C. This commercial-grade temperature range is validated per the datasheet's DC and AC specifications, including ±1/2 LSB integral nonlinearity and 70 dB signal-to-noise-and-distortion ratio across the full range. It does not support extended industrial or military temperature grades.
Does the AD1674KN require external clocking?
No, the AD1674KN does not require an external clock. It contains a fully integrated oscillator and timing circuitry that enables autonomous 100 kSPS conversion. The internal clock drives the successive approximation register and sample-and-hold control-no external crystal or clock source is needed for basic operation.
Can the AD1674KN interface directly with an 8-bit microprocessor bus?
Yes, the AD1674KN supports direct 8-bit bus interfacing via its dual-byte output mode. When the 12/8 pin is held LOW and A0 toggles, the device outputs the 8 MSBs (DB11–DB4) and then the 4 LSBs plus four trailing zeros (DB3–DB0 with DB7–DB4 = 0), enabling seamless connection to 8-bit data buses without external latches or buffers.
How is bipolar input configured on the AD1674KN?
Bipolar input on the AD1674KN is configured by connecting the BIP OFF pin (Pin 12) through a 50 Ω resistor to REF OUT (Pin 8). This enables ±5 V or ±10 V input ranges on the 10 VIN or 20 VIN pins respectively. The analog common must be tied to AGND, and VEE must be supplied at –12 V or –15 V for proper bipolar operation.
Is the AD1674KN pin-compatible with the AD574A?
Yes, the AD1674KN is explicitly pin-compatible with the AD574A and AD674A, sharing identical pin numbering, signal names, and physical footprint in the 28-pin DIP package. This allows direct replacement in legacy designs while adding integrated sample-and-hold functionality and improved conversion speed.
AD1674KN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD1674KN FAQ
1.How can I place an order for AD1674KN through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674KN 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 AD1674KN reliable?
The price and inventory of AD1674KN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674KN is usually 5 days.
3.What payment methods are accepted for AD1674KN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674KN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674KN?
AD1674KN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674KN 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 AD1674KN?
For technical support, including AD1674KN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674KN requirements.
6.How does Aetrix verify that AD1674KN is sourced from the original manufacturer or authorized distributors?
All AD1674KN 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 AD1674KN meets industry standards.
7.What is the process for return or replacement of AD1674KN?
All AD1674KN units undergo pre-shipment inspection (PSI). If there is an issue with AD1674KN, 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 AD1674KN part is unused and in its original packaging.
Return procedure for AD1674KN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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