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Analog Devices Inc. AD1674JN
- Part No.:
- AD1674JN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AD1674JN.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,721
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Product details
Overview
AD1674JN 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 8-/16-bit microprocessor interface. It supports unipolar (0 V–10 V, 0 V–20 V) and bipolar (±5 V, ±10 V) input ranges, operates from +5 V logic and ±12 V/±15 V analog supplies, and delivers guaranteed 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 AD1674JN datasheet, AD1674JN pinout, AD1674JN application, or AD1674JN 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 per MIL-STD-883-compliant J-grade testing, and validated alternatives for legacy ADC replacement scenarios.
Technical Context
The AD1674JN implements a successive approximation register (SAR) architecture with an integrated SHA that supports full Nyquist bandwidth operation up to 1 MHz and achieves 12-bit accuracy without external acquisition wait states. Its BiMOS II process integrates high-precision bipolar analog circuitry (laser-trimmed scaling resistors, 10 V reference) with CMOS digital logic for stable offset and full-scale error over temperature.
It features dual-mode digital interface: full-control mode uses CE, CS, R/C, A0, and 12/8 for multiplexed bus access, while stand-alone mode simplifies timing by using only R/C edge-triggered conversion with automatic STS assertion and 0.6–1.2 µs data-valid delay - enabling low-jitter sampling critical for dynamic signal analysis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees 4096 discrete output codes with no missing codes across full operating range. |
| Conversion Rate | 100 kSPS - fixed 10 µs conversion time for 12-bit cycles, enabling real-time monitoring of fast transients. |
| S/(N+D) Ratio | 69 dB (min) at 10 kHz - quantifies usable dynamic range for sinusoidal inputs in measurement applications. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - selectable via BIP OFF and input pin routing, eliminating external gain/attenuation networks. |
| Reference Voltage | 10.0 V ±100 mV (REF OUT) - internally trimmed, buffered output usable as system reference for external circuitry. |
| Supply Voltages | +5 V (VLOGIC), +12/+15 V (VCC), –12/–15 V (VEE) - three-rail operation required for bipolar analog input integrity. |
| Temperature Range | 0°C to +70°C - commercial-grade specification validated per AD1674J ordering code, suitable for non-military embedded systems. |
Pinout & Package
AD1674JN is housed in a 28-pin plastic DIP (N-28 package), with 0.6-inch body width and standard through-hole mounting. Pin layout follows industry-standard AD574A/AD674A footprint for drop-in compatibility in legacy designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Power supply input | +5 V logic rail - powers internal CMOS buffers and control logic; must be decoupled locally to suppress digital noise coupling into analog section. |
| 12/8 (Pin 2) | Digital input | Selects output format: HIGH = 12-bit parallel word; LOW = two 8-bit nibbles - enables direct connection to 8-bit microprocessor data buses. |
| CS (Pin 3) | Digital input | Active-low chip select - enables device decoding on shared address/data buses; must be asserted before CE for valid read/convert commands. |
| A0 (Pin 4) | Digital input | Byte address control - LOW initiates 12-bit conversion and enables DB11–DB8; HIGH enables DB3–DB0 with DB7–DB4 = 0 in 8-bit mode. |
| R/C (Pin 5) | Digital input | Read/Convert control - LOW starts conversion in full-control mode; falling edge triggers conversion in stand-alone mode. |
| CE (Pin 6) | Digital input | Active-high chip enable - initiates operation when CS is LOW; timing-critical for setup/hold relative to R/C and A0. |
| VCC (Pin 7) | Power supply input | +12 V or +15 V analog supply - powers SHA, DAC, and comparator; requires low-noise filtering to maintain INL/DNL performance. |
| REF OUT (Pin 8) | Analog output | +10 V reference source - provides stable, laser-trimmed voltage for external circuitry; max 2 mA load, must be buffered for ±12 V operation. |
| AGND (Pin 9) | Analog ground | Analog common reference - must be isolated from DGND and connected to star ground point near VCC/VEE decoupling capacitors. |
| REF IN (Pin 10) | Analog input | Reference feedback node - connected via 50 Ω resistor to REF OUT for internal calibration; open or misconnected causes full-scale error. |
| VEE (Pin 11) | Power supply input | –12 V or –15 V analog supply - essential for bipolar input operation and SHA linearity; same noise sensitivity as VCC. |
| BIP OFF (Pin 12) | Analog input | Bipolar offset adjustment - tied to REF OUT via 50 Ω for ±5 V/±10 V modes; tied to AGND for 0–10 V/0–20 V unipolar operation. |
| 10 VIN (Pin 13) | Analog input | 10 V span input - accepts 0–10 V (unipolar) or ±5 V (bipolar); must be left unconnected when using 20 VIN for 20 V span. |
| 20 VIN (Pin 14) | Analog input | 20 V span input - accepts 0–20 V (unipolar) or ±10 V (bipolar); must be left unconnected when using 10 VIN for 10 V span. |
| DGND (Pin 15) | Digital ground | Digital common reference - separates digital switching noise from analog section; connected to system ground at single point only. |
| DB0–DB3 (Pins 16–19) | Digital output | LSB nibble - enabled during read when A0 = HIGH and 12/8 = LOW; outputs DB3–DB0 with DB7–DB4 = 0 in 8-bit mode. |
| DB4–DB7 (Pins 20–23) | Digital output | Middle nibble - enabled when A0 = LOW and 12/8 = LOW; outputs DB7–DB4; forced to 0 when A0 = HIGH in 8-bit mode. |
| DB8–DB11 (Pins 24–27) | Digital output | MSB nibble - always active in 12-bit mode (12/8 = HIGH); outputs DB11–DB8; disabled when A0 = HIGH in 8-bit mode. |
| STS (Pin 28) | Digital output | Status flag - goes HIGH at conversion start and returns LOW 0.6–1.2 µs after data is valid; used for interrupt-driven data capture. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sample-and-Hold Amplifier | Supports full Nyquist bandwidth (1 MHz) with <1 µs acquisition time - eliminates need for external SHA and associated layout complexity. |
| Factory Laser-Trimmed Scaling Resistors | Enables four calibrated input ranges (±5 V, ±10 V, 0–10 V, 0–20 V) without external components - reduces BOM count and calibration labor. |
| BiMOS II Process Integration | Combines bipolar precision analog (reference, SHA, DAC) with CMOS digital logic on one die - ensures matched thermal drift and stable INL over temperature. |
| Three-State Output Buffers | Directly interfaces to 8-bit or 16-bit microprocessor buses without external latches or transceivers - simplifies PCB routing and reduces component count. |
| AC and DC Parameter Guarantee | Specified for both static (INL ±1 LSB, offset ±3 LSB) and dynamic (S/(N+D) ≥69 dB, THD ≤–82 dB) performance - validated for mixed-signal test and control applications. |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: High-accuracy voltage monitoring in PLC I/O modules measuring sensor outputs (RTDs, strain gauges) across 0–10 V and ±10 V ranges. IC Role / Device Role / Timing Role: Primary ADC performing 100 kSPS sampling with integrated SHA and on-board 10 V reference - replaces multi-chip solutions requiring external precision references and hold amplifiers. Use Value: Eliminates external calibration for offset and full-scale error; maintains ±1 LSB INL over 0°C to +70°C without trimming - reducing field failure rates and recalibration intervals. |
Use Scenario: Digitizing stimulus-response waveforms in benchtop ATE systems verifying op-amp THD and SNR under production test conditions. IC Role / Device Role / Timing Role: Stand-alone mode R/C-triggered ADC delivering low-aperture-jitter (250 ps) sampling synchronized to external pattern generators. Use Value: Guaranteed 69 dB S/(N+D) and –82 dB THD at 10 kHz enables accurate distortion measurement down to –80 dBc - meeting IEEE 1057 compliance requirements. |
| Legacy System Upgrades | Process Control Loop Monitoring |
|
Use Scenario: Replacing obsolete AD574A in existing military-grade instrumentation where board space and pin compatibility are constrained. IC Role / Device Role / Timing Role: Drop-in compatible 28-pin DIP ADC with identical pinout and timing - retains original PCB layout while adding integrated SHA and faster 10 µs conversion. Use Value: No PCB redesign required; same socket footprint and control protocol - cuts upgrade cost and qualification time by >70% versus alternative solutions. |
Use Scenario: Continuous monitoring of reactor temperature and pressure signals in chemical plant DCS cabinets with ambient temperatures up to +65°C. IC Role / Device Role / Timing Role: Dual-supply (±12 V) ADC acquiring bipolar 4–20 mA loop-derived voltages with 12-bit resolution and 0.1% FSR full-scale error. Use Value: Internal 10 V reference stability (±100 mV) and ±2 LSB unipolar offset drift over temperature ensure <0.05% reading uncertainty across full operating range. |
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 |
|---|---|---|---|
| AD1674KN | Same package and pinout; tighter INL (±0.5 LSB) and higher S/(N+D) (70 dB) due to enhanced grade screening. | Required for applications demanding improved linearity in high-precision metrology or calibration standards. | Select AD1674KN when ±0.5 LSB INL and 70 dB S/(N+D) are mandatory; otherwise AD1674JN offers optimal cost/performance for general-purpose DAQ. |
| AD7892BRZ | 3 V/5 V single-supply operation, 100 kSPS, 12-bit SAR, but lacks integrated SHA and reference; requires external REF and driver. | Suitable for low-power, battery-operated portable instruments where ±12 V rails are unavailable. | Choose AD7892BRZ only if system power architecture mandates single 5 V supply and external reference tolerance is acceptable. |
Compared with AD1674KN, AD1674JN trades 0.5 LSB INL and 1 dB S/(N+D) for lower unit cost and broader commercial availability; compared with AD7892BRZ, it delivers complete signal chain integration (SHA + REF + buffers) at the expense of dual-supply complexity - making AD1674JN the preferred choice for retrofitting legacy industrial systems.
Availability
AD1674JN is available at Aetrix Electronics and suitable for industrial process control, automated test equipment, and legacy instrumentation upgrades requiring stable component supply, long-term obsolescence management, and MIL-STD-883-compliant traceability.
Supply support for AD1674JN 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, founded in 1965 and headquartered in Wilmington, MA.
The AD1674 product line was designed for high-accuracy, medium-speed data acquisition in industrial, instrumentation, and defense systems - emphasizing pin compatibility with legacy converters, integrated analog front-end functionality, and guaranteed AC/DC performance across temperature.
FAQ
What is the maximum sampling rate supported by the AD1674JN?
The AD1674JN supports a fixed conversion rate of 100 kSPS, corresponding to a 10 µs conversion time for full 12-bit cycles. This rate is guaranteed across its 0°C to +70°C operating range and does not vary with supply voltage or input signal amplitude. The device achieves this performance using an internal clock and successive approximation architecture - no external clock source is required or supported. AD1674JN maintains timing integrity even under worst-case supply and temperature conditions specified in the datasheet.
Does the AD1674JN require external components for basic operation?
Yes - the AD1674JN requires external 0.1 µF ceramic decoupling capacitors on VLOGIC, VCC, and VEE pins, plus a 50 Ω resistor between REF OUT and REF IN for full-scale calibration. For bipolar operation, a second 50 Ω resistor connects BIP OFF to REF OUT. While the internal 10 V reference and SHA eliminate many external parts, these passive components are mandatory for specified INL, full-scale error, and noise performance. AD1674JN will not meet datasheet specifications without them.
Can the AD1674JN operate with only +5 V and ground supplies?
No - the AD1674JN requires three independent supplies: +5 V (VLOGIC), +12 V or +15 V (VCC), and –12 V or –15 V (VEE). The dual analog rails are essential for proper operation of the internal SHA, DAC, and comparator circuitry. Attempting to run AD1674JN with only +5 V and ground will result in undefined behavior, failure to acquire valid conversions, and potential damage due to violation of absolute maximum ratings on VEE and analog input pins.
How does the AD1674JN handle unipolar versus bipolar input configurations?
The AD1674JN selects input range via hardware connections: for unipolar (0–10 V or 0–20 V), BIP OFF is tied to AGND and either 10 VIN or 20 VIN is driven; for bipolar (±5 V or ±10 V), BIP OFF is connected to REF OUT via 50 Ω and the corresponding VIN pin is used. The internal laser-trimmed resistor network automatically scales the input - no software configuration or register writes are needed. AD1674JN's analog front-end is fully hardwired, making range selection deterministic and immune to firmware errors.
Is the AD1674JN pin-compatible with the AD574A?
Yes - the AD1674JN uses the identical 28-pin DIP pinout, signal naming, and timing conventions as the AD574A, enabling direct replacement in existing designs. Key signals (CS, CE, R/C, A0, 12/8, STS, DB0–DB11, REF OUT, REF IN, BIP OFF, 10 VIN, 20 VIN) occupy matching positions. However, AD1674JN adds integrated SHA functionality and faster 10 µs conversion versus AD574A's 25 µs, requiring no changes to PCB layout but potentially enabling higher system throughput.
AD1674JN 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:
- -
AD1674JN FAQ
1.How can I place an order for AD1674JN through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674JN 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 AD1674JN reliable?
The price and inventory of AD1674JN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674JN is usually 5 days.
3.What payment methods are accepted for AD1674JN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674JN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674JN?
AD1674JN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674JN 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 AD1674JN?
For technical support, including AD1674JN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674JN requirements.
6.How does Aetrix verify that AD1674JN is sourced from the original manufacturer or authorized distributors?
All AD1674JN 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 AD1674JN meets industry standards.
7.What is the process for return or replacement of AD1674JN?
All AD1674JN units undergo pre-shipment inspection (PSI). If there is an issue with AD1674JN, 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 AD1674JN part is unused and in its original packaging.
Return procedure for AD1674JN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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