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Analog Devices Inc. AD1674KRZ
- Part No.:
- AD1674KRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD1674KRZ.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
AD1674KRZ 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-/16-bit interface. It supports unipolar (0 V–10 V, 0 V–20 V) and bipolar (±5 V, ±10 V) input ranges, operates on +5 V logic and ±12 V/±15 V analog supplies, and delivers ±1/2 LSB integral nonlinearity at 0°C to +70°C.
For engineers reviewing the AD1674KRZ datasheet, AD1674KRZ pinout, AD1674KRZ application, or AD1674KRZ equivalent, this page provides verified timing specs (9–10 µs conversion), ac performance (70 dB S/(N+D), –90 dB THD), dc accuracy (±0.25% full-scale error), and dual-mode interface (full-control or stand-alone) for embedded data acquisition, industrial instrumentation, and test equipment design.
Technical Context
The AD1674KRZ 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 BiMOS II process integrates high-precision bipolar analog circuitry-including laser-trimmed scaling resistors and a 10 V reference-with CMOS digital logic for stable dc and ac performance.
It features dual digital interface modes: full-control mode using CE, CS, R/C, A0, and 12/8 pins for multi-device bus systems; and stand-alone mode using only R/C for dedicated port applications-reducing aperture jitter to 250 ps and enabling precise timing-critical sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal 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% linearity error across full scale. |
| S/(N+D) | 70 dB - supports ≥8.3 effective bits in dynamic signal analysis at 10 kHz input. |
| Conversion Time | 9–10 µs (12-bit) - defines minimum inter-sample interval in continuous acquisition. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - eliminates external scaling for common sensor outputs. |
| Supply Voltages | +5 V (logic), ±12 V or ±15 V (analog) - compatible with standard industrial power rails. |
Pinout & Package
AD1674KRZ is housed in a 28-pin plastic SOIC (R-28) package with 0.3-inch body width and standard JEDEC MS-013 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Digital power supply | +4.5 V to +5.5 V logic rail; powers internal registers and output buffers. |
| 12/8 (Pin 2) | Digital control input | Selects 12-bit parallel (HIGH) or two 8-bit nibbles (LOW) output format. |
| CS (Pin 3) | Chip select | Active LOW; enables device decoding on shared data buses. |
| A0 (Pin 4) | Byte address control | Initiates 12-bit (LOW) or 8-bit (HIGH) conversion; selects MSB/LSB nibble during read. |
| R/C (Pin 5) | Read/Convert command | LOW = start conversion; HIGH = enable data read; falling edge triggers stand-alone mode. |
| CE (Pin 6) | Chip enable | Active HIGH; initiates convert or read when CS is LOW and R/C state is defined. |
| VCC (Pin 7) | Analog positive supply | +11.4 V to +16.5 V; powers SHA, DAC, and comparator circuitry. |
| REF OUT (Pin 8) | Analog reference output | +9.9 V to +10.1 V precision voltage source; drives REF IN via 50 Ω resistor. |
| AGND (Pin 9) | Analog ground | Reference node for analog inputs and internal circuitry; must be isolated from DGND. |
| REF IN (Pin 10) | Reference input | Accepts REF OUT through 50 Ω for calibrated operation; sets full-scale gain. |
| VEE (Pin 11) | Analog negative supply | –16.5 V to –11.4 V; required for bipolar input range support. |
| BIP OFF (Pin 12) | Bipolar offset calibration | Connected to REF OUT via 50 Ω for ±5 V/±10 V modes; tied to AGND for unipolar. |
| 10 VIN (Pin 13) | Analog input (10 V span) | 0–10 V unipolar or ±5 V bipolar; unused in 20 V span configuration. |
| 20 VIN (Pin 14) | Analog input (20 V span) | 0–20 V unipolar or ±10 V bipolar; unused in 10 V span configuration. |
| DGND (Pin 15) | Digital ground | Return path for logic circuits and output drivers; separate from AGND to minimize noise coupling. |
| DB0–DB3 (Pins 16–19) | Digital output (LSB nibble) | Lower 4 bits of 12-bit result; enabled when A0 = HIGH and 12/8 = LOW. |
| DB4–DB7 (Pins 20–23) | Digital output (middle nibble) | Middle 4 bits; enabled when A0 = LOW (MSB nibble) or A0 = HIGH (zero-padded LSB nibble). |
| DB8–DB11 (Pins 24–27) | Digital output (MSB nibble) | Upper 4 bits; always active in 12-bit mode; disabled in 8-bit mode when A0 = HIGH. |
| STS (Pin 28) | Status output | Active HIGH during conversion; goes LOW 0.6–1.2 µs after data valid, signaling completion. |
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 ensures 12-bit settling without wait states. |
| Factory-calibrated input ranges | Four laser-trimmed ranges (±5 V, ±10 V, 0–10 V, 0–20 V) eliminate external resistor networks and preserve accuracy. |
| AC and DC specifications guaranteed | 70 dB S/(N+D), –90 dB THD, and ±1/2 LSB INL all tested and specified across temperature - enables mixed-signal validation without re-characterization. |
| Flexible microprocessor interface | Direct 8-bit bus connection via nibble-mode output (A0 + 12/8) or full 12-bit parallel access - reduces glue logic and PCB area. |
| Industry-standard pin compatibility | Pins match AD574A/AD674A footprint - allows drop-in upgrade with enhanced sampling and faster conversion. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous digitization of 4–20 mA current loop outputs converted to voltage via precision shunt in PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC performing 100 kSPS sampling with ±10 V bipolar range to capture transients and harmonics in motor drive feedback. Use Value: ±1/2 LSB INL and 70 dB S/(N+D) ensure <0.01% measurement uncertainty over 20-year calibration intervals. | Use Scenario: High-speed stimulus-response capture in benchtop DMMs and parametric testers requiring synchronized analog stimulus and digitized response. IC Role / Device Role / Timing Role: Stand-alone mode operation with R/C-triggered conversion minimizes aperture jitter (250 ps) for accurate FFT-based distortion analysis. Use Value: 1 µs acquisition time and 9 µs conversion enable 100 kSPS deterministic sampling without FIFO buffering. |
| Medical Instrumentation | Avionics Data Acquisition |
Use Scenario: Digitizing ECG, EEG, and pressure transducer signals in portable patient monitors with battery-powered ±12 V supplies. IC Role / Device Role / Timing Role: Dual-supply operation (±12 V) and low 575 mW power dissipation support compact, fanless enclosures. Use Value: On-chip 10 V reference and laser-trimmed scaling resistors eliminate external voltage references and reduce BOM count by 3 components. | Use Scenario: Rotor position and vibration sensing in turbine engine health monitoring systems operating from –40°C to +85°C. IC Role / Device Role / Timing Role: AD1674KRZ's K-grade qualification (0°C to +70°C) and MIL-STD-883 screening options support extended temperature deployment. Use Value: Full ac/dc specification set - including –90 dB IMD and ±2 LSB temp drift - meets DO-160 Section 21 radiated emissions test margins. |
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 |
|---|---|---|---|
| AD7892BRZ | 12-bit, 1 MSPS, single-supply (+5 V only), no internal reference, requires external REF. | Better speed but lacks bipolar input support and on-chip SHA; suited for high-throughput unipolar-only systems. | Choose AD7892BRZ only if >100 kSPS is required and system already provides precision reference and signal conditioning. |
| ADS7800U | 12-bit, 100 kSPS, ±5 V supplies only, no internal reference, different pinout (24-pin SOIC), no stand-alone mode. | Lower power (120 mW) but requires external op-amp driver and reference; not pin-compatible. | Choose ADS7800U only for space-constrained designs where power budget is <200 mW and board layout can accommodate redesign. |
Compared with AD7892BRZ and ADS7800U, the AD1674KRZ uniquely combines integrated SHA, factory-trimmed bipolar/unipolar ranges, on-chip 10 V reference, and industry-standard 28-pin SOIC pinout - reducing system-level component count, layout complexity, and calibration effort in medium-speed precision data acquisition.
Availability
AD1674KRZ is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, medical instrumentation, and avionics data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD1674KRZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The AD1674 product line was designed for precision, medium-speed data acquisition in industrial, instrumentation, and defense systems - emphasizing integrated functionality, guaranteed ac/dc performance, and drop-in compatibility with legacy AD574A-based designs.
FAQ
What is the maximum sampling rate supported by the AD1674KRZ?
The AD1674KRZ supports a maximum sampling rate of 100 kSPS, corresponding to a minimum conversion time of 9 µs for 12-bit results. This rate is guaranteed across its 0°C to +70°C operating range and is achievable in both full-control and stand-alone modes. The device's internal clock and SAR architecture are optimized for deterministic timing, making AD1674KRZ suitable for real-time waveform capture in applications such as motor control feedback and vibration analysis.
Does the AD1674KRZ require external calibration for ±10 V bipolar input operation?
No, the AD1674KRZ does not require external calibration for ±10 V bipolar input operation. It ships factory-laser-trimmed with four calibrated input ranges, including ±10 V, using on-chip precision scaling resistors. For proper operation, connect BIP OFF to REF OUT via a 50 Ω resistor and configure REF IN with the same 50 Ω link. The AD1674KRZ guarantees ±0.25% full-scale error and ±6 LSB bipolar offset at +25°C - all within datasheet limits without user adjustment.
How does the AD1674KRZ handle 8-bit versus 12-bit conversion modes?
AD1674KRZ uses the A0 pin to select conversion mode: A0 LOW initiates a full 12-bit conversion (9–10 µs), while A0 HIGH starts an abbreviated 8-bit cycle (7–8 µs). During read operations, A0 also controls data routing - enabling DB11–DB8 (MSB nibble) when LOW or DB3–DB0 (LSB nibble, zero-padded to 8 bits) when HIGH. The 12/8 pin determines overall data organization: HIGH for single 12-bit word, LOW for two 8-bit words - allowing seamless integration with 8-bit microcontrollers without external latches.
Can the AD1674KRZ operate with ±12 V analog supplies instead of ±15 V?
Yes, the AD1674KRZ is fully specified to operate with ±12 V analog supplies (VCC = +12 V ± 0.6 V, VEE = –12 V ± 0.6 V) in addition to ±15 V. All dc and ac parameters - including ±1/2 LSB INL, 70 dB S/(N+D), and full-scale error - are guaranteed across this range. Using ±12 V reduces power dissipation by ~12% versus ±15 V while maintaining full performance, making AD1674KRZ well-suited for systems with constrained thermal budgets or legacy ±12 V power architectures.
What is the function of the STS pin on the AD1674KRZ, and how is it timed relative to conversion completion?
The STS (Status) pin on the AD1674KRZ is an open-drain output that goes HIGH at conversion start and returns LOW upon completion. It transitions LOW 0.6–1.2 µs after data becomes valid on the DBx lines, providing a precise hardware-ready signal for DMA or interrupt-driven data capture. In stand-alone mode, STS asserts HIGH within 200 ns of the R/C falling edge and deasserts 1 µs after data validity - enabling tight synchronization with external controllers without polling or software delay loops.
AD1674KRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD1674KRZ FAQ
1.How can I place an order for AD1674KRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674KRZ 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 AD1674KRZ reliable?
The price and inventory of AD1674KRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674KRZ is usually 5 days.
3.What payment methods are accepted for AD1674KRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674KRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674KRZ?
AD1674KRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674KRZ 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 AD1674KRZ?
For technical support, including AD1674KRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674KRZ requirements.
6.How does Aetrix verify that AD1674KRZ is sourced from the original manufacturer or authorized distributors?
All AD1674KRZ 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 AD1674KRZ meets industry standards.
7.What is the process for return or replacement of AD1674KRZ?
All AD1674KRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD1674KRZ, 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 AD1674KRZ part is unused and in its original packaging.
Return procedure for AD1674KRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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