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Analog Devices Inc. AD1674JNZ
- Part No.:
- AD1674JNZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AD1674JNZ.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:128
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Product details
Overview
AD1674JNZ 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 logic supplies, and delivers ±1 LSB integral nonlinearity at 0°C to +70°C - widely deployed in precision data acquisition systems for industrial process control.
For engineers reviewing the AD1674JNZ datasheet, AD1674JNZ pinout, AD1674JNZ application, or AD1674JNZ equivalent, this page provides verified technical context, confirmed pin functions, real-world timing behavior in full-control and stand-alone modes, and validated alternatives for legacy 12-bit ADC replacement in embedded instrumentation and test equipment.
Technical Context
The AD1674JNZ 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 current-steering with laser-trimmed scaling resistors to achieve calibrated input ranges without external components.
It features dual digital interface modes: full-control mode (using CE, CS, R/C, A0, and 12/8) for multiplexed microprocessor buses, and stand-alone mode (R/C edge-triggered, CE/CS tied high/low) optimized for low-aperture-jitter timing - delivering 250 ps aperture jitter and 69 dB S/(N+D) at 10 kHz input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct output codes with no missing codes across full operating range. |
| Conversion Rate | 100 kSPS - fixed 10 µs conversion time for 12-bit cycle, enabling real-time sampling of signals up to 50 kHz Nyquist frequency. |
| INL / DNL | ±1 LSB INL, no missing codes DNL - ensures monotonicity and end-point linearity critical for closed-loop control feedback. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - selectable via BIP OFF and input pin routing; no external scaling required. |
| S/(N+D) Ratio | 69 dB at 10 kHz - measured with coherent 2048-point FFT; supports dynamic signal fidelity in vibration monitoring and audio digitization. |
| Aperture Jitter | 250 ps - directly limits SNR degradation at high input frequencies; enables accurate undersampling applications. |
| Supply Voltages | +5 V (VLOGIC), ±12 V or ±15 V (VCC/VEE) - dual-supply analog section isolates noise-sensitive conversion from digital logic. |
Pinout & Package
AD1674JNZ is housed in a 28-lead plastic DIP (N-28 package) with 0.6-inch body width and through-hole mounting. Pin spacing follows standard 0.1-inch grid; pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Power | +5 V logic supply rail; powers internal CMOS interface logic and output buffers; must be decoupled locally. |
| 12/8 (Pin 2) | Digital Input | Selects output format: HIGH = 12-bit parallel word, LOW = two 8-bit nibbles for 8-bit bus compatibility. |
| CS (Pin 3) | Digital Input | Active-low chip select; enables device decoding on shared data/address buses in full-control mode. |
| A0 (Pin 4) | Digital Input | Byte address control: LOW during convert start → 12-bit cycle; HIGH → 8-bit cycle; during read → selects MSB/LSB nibble. |
| R/C (Pin 5) | Digital Input | Read/Convert control: LOW = initiate conversion, HIGH = enable data read; edge-triggered in stand-alone mode. |
| CE (Pin 6) | Digital Input | Active-high chip enable; initiates conversion or read when combined with CS and R/C per truth table. |
| VCC (Pin 7) | Power | +12 V or +15 V analog supply; powers SHA, reference, and SAR; requires low-noise filtering. |
| REF OUT (Pin 8) | Analog Output | +10 V reference output; drives external circuitry (e.g., BIP OFF resistor) but must be buffered for ±12 V operation. |
| AGND (Pin 9) | Power | Analog ground reference; separate from DGND to minimize digital switching noise coupling into conversion path. |
| REF IN (Pin 10) | Analog Input | Reference input node; connected via 50 Ω resistor to REF OUT for internal reference use; enables external reference override. |
| VEE (Pin 11) | Power | –12 V or –15 V analog supply; powers negative-side analog circuitry including comparator and DAC current sinks. |
| 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 mode. |
| 10 VIN (Pin 13) | Analog Input | 10 V span input: accepts 0–10 V unipolar or ±5 V bipolar; unused in 20 V span configuration. |
| 20 VIN (Pin 14) | Analog Input | 20 V span input: accepts 0–20 V unipolar or ±10 V bipolar; unused in 10 V span configuration. |
| DGND (Pin 15) | Power | Digital ground reference; isolated from AGND to prevent ground bounce from corrupting analog measurements. |
| DB0–DB3 (Pins 16–19) | Digital Output | LSB nibble (bits 0–3); enabled only when A0 = HIGH and 12/8 = LOW, or as part of full 12-bit word when 12/8 = HIGH. |
| DB4–DB7 (Pins 20–23) | Digital Output | Middle nibble (bits 4–7); always active in 12-bit mode; outputs zeros when A0 = HIGH and 12/8 = LOW. |
| DB8–DB11 (Pins 24–27) | Digital Output | MSB nibble (bits 8–11); enabled when A0 = LOW and 12/8 = LOW, or as upper bits in full 12-bit word. |
| STS (Pin 28) | Digital Output | Status flag: HIGH during conversion, LOW when data is valid and ready for read; used for handshaking in polled systems. |
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 need for external SHA and simplifies layout. |
| Factory-Calibrated Input Ranges | Laser-trimmed resistors enable four precise ranges (±5 V, ±10 V, 0–10 V, 0–20 V) without external calibration or gain-setting components. |
| Flexible Microprocessor Interface | Three-state output buffers with 12/8 and A0 controls allow direct connection to 8-bit or 16-bit buses - no glue logic required. |
| AC + DC Performance Guarantee | Specified for both static (INL ±1 LSB, offset ±3 LSB) and dynamic parameters (69 dB S/(N+D), –90 dB THD) - validated for mixed-signal test and measurement. |
| Industry-Standard Pinout Compatibility | Pins match AD574A/AD674A footprint - enables drop-in replacement in legacy designs with minimal PCB rework. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage/current sensing from PLC analog I/O modules feeding real-time control algorithms. IC Role / Device Role / Timing Role: Primary 12-bit ADC capturing sensor outputs at 100 kSPS with ±5 V bipolar range for differential transducer signals. Use Value: On-chip SHA and calibrated ranges eliminate external signal conditioning, reducing BOM count and improving long-term drift stability over 0°C to +70°C. |
Use Scenario: Digitizing stimulus-response waveforms in benchtop multimeters and functional testers. IC Role / Device Role / Timing Role: High-fidelity acquisition front-end with 69 dB S/(N+D) and 250 ps aperture jitter for accurate harmonic analysis. Use Value: Coherent FFT testing capability and guaranteed AC specs enable pass/fail validation against IEEE 1057 standards without external calibration. |
| Embedded Data Loggers | Legacy System Upgrades |
|
Use Scenario: Battery-powered environmental sensors logging temperature, pressure, and humidity over extended periods. IC Role / Device Role / Timing Role: Low-power 12-bit converter interfacing to 8-bit microcontrollers via 12/8 = LOW and A0-controlled nibble reads. Use Value: Dual-supply operation (±12 V +5 V) and 385 mW typical dissipation support robust analog front-end design in unregulated power environments. |
Use Scenario: Replacing obsolete AD574A in military-grade avionics signal conditioning cards requiring MIL-STD-883 screening. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering faster 10 µs conversion and integrated SHA - no layout change needed. Use Value: Maintains existing firmware and PCB while adding sampling capability and improved dynamic performance for aging test platforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7874KN | 12-bit, 100 kSPS SAR ADC with internal reference and SPI interface; no integrated SHA; 28-pin SOIC only. | Requires external SHA for wideband inputs; SPI interface replaces parallel bus - needs firmware rewrite. | Choose when migrating to serial interface and board space is constrained; not suitable for drop-in AD1674JNZ replacement. |
| MAX191BCNG+ | 12-bit, 100 kSPS SAR ADC with internal reference and track/hold; single +5 V supply; 24-pin SOIC. | Unipolar-only (0–5 V); lacks bipolar input support and ±12 V analog rails; lower full-scale accuracy (±2 LSB INL). | Choose for cost-sensitive, low-voltage embedded systems where bipolar input and high DC accuracy are not required. |
Compared with AD7874KN and MAX191BCNG+, the AD1674JNZ uniquely combines integrated SHA, true bipolar/unipolar range flexibility, industry-standard parallel interface, and proven reliability in harsh industrial environments - making it irreplaceable where legacy compatibility and analog signal integrity are mandatory.
Availability
AD1674JNZ is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, embedded data loggers, and legacy system upgrades requiring stable component supply and long-term obsolescence management.
Supply support for AD1674JNZ 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 AD1674JNZ belongs to Analog Devices' legacy precision data acquisition product line, designed specifically for high-accuracy, medium-speed digitization in industrial, instrumentation, and defense applications where reliability and long-term support are critical.
FAQ
What is the maximum sampling rate supported by the AD1674JNZ?
The AD1674JNZ supports a fixed 100 kSPS conversion rate, corresponding to a 10 µs conversion time for the full 12-bit cycle. This rate is guaranteed across its 0°C to +70°C operating range and is independent of interface mode - whether used in full-control or stand-alone configuration, the AD1674JNZ consistently delivers 100 kSPS performance with no software overhead or wait states.
Does the AD1674JNZ require external calibration for ±10 V bipolar operation?
No, the AD1674JNZ does not require external calibration for ±10 V bipolar operation. Its factory-laser-trimmed scaling resistors and internal 10 V reference ensure the ±10 V range is calibrated at production. Users need only connect BIP OFF to REF OUT via a 50 Ω resistor and route the signal to 20 VIN - the AD1674JNZ maintains ±1 LSB INL and ±6 LSB bipolar offset error over temperature without user adjustment.
Can the AD1674JNZ interface directly with an 8-bit microcontroller bus?
Yes, the AD1674JNZ can interface directly with an 8-bit microcontroller bus using its flexible 12/8 and A0 controls. When 12/8 is held LOW, the AD1674JNZ outputs two 8-bit words: A0 = LOW enables DB4–DB11 (upper byte), and A0 = HIGH enables DB0–DB3 with DB7–DB4 forced to zero (lower byte). This eliminates external latches or bus transceivers in 8-bit systems.
What is the purpose of the STS pin on the AD1674JNZ?
The STS (Status) pin on the AD1674JNZ is a dedicated digital output that goes HIGH at conversion start and returns LOW when conversion completes and data is valid. It provides hardware handshaking for polled or interrupt-driven read operations - allowing microcontrollers to avoid timing loops or fixed delays. In the AD1674JNZ, STS asserts within 200 ns of R/C or CE activation and deasserts 0.6–1.2 µs before data becomes stable.
How does the AD1674JNZ differ from the AD574A in terms of functionality?
The AD1674JNZ extends the AD574A with an integrated sample-and-hold amplifier (SHA), eliminating the need for external SHA circuitry and associated layout complexity. It also delivers faster 10 µs conversion time versus AD574A's 25 µs, supports both AC and DC specifications (e.g., 69 dB S/(N+D)), and offers enhanced input range flexibility - all while maintaining identical pinout and command protocol for seamless drop-in replacement in legacy AD574A designs.
AD1674JNZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- ±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:
- -
AD1674JNZ FAQ
1.How can I place an order for AD1674JNZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674JNZ 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 AD1674JNZ reliable?
The price and inventory of AD1674JNZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674JNZ is usually 5 days.
3.What payment methods are accepted for AD1674JNZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674JNZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674JNZ?
AD1674JNZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674JNZ 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 AD1674JNZ?
For technical support, including AD1674JNZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674JNZ requirements.
6.How does Aetrix verify that AD1674JNZ is sourced from the original manufacturer or authorized distributors?
All AD1674JNZ 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 AD1674JNZ meets industry standards.
7.What is the process for return or replacement of AD1674JNZ?
All AD1674JNZ units undergo pre-shipment inspection (PSI). If there is an issue with AD1674JNZ, 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 AD1674JNZ part is unused and in its original packaging.
Return procedure for AD1674JNZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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