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Analog Devices Inc. AD1674AR-REEL
- Part No.:
- AD1674AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD1674AR-REEL.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,151
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Product details
Overview
AD1674AR-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 8-/16-bit microprocessor interface. It supports unipolar (0 V–10 V, 0 V–20 V) and bipolar (±5 V, ±10 V) input ranges, delivers ±1 LSB integral nonlinearity, and operates across –40°C to +85°C. It is used in precision data acquisition systems requiring AC/DC-specified performance and industrial-grade reliability.
For engineers reviewing the AD1674AR-REEL datasheet, AD1674AR-REEL pinout, AD1674AR-REEL application, or AD1674AR-REEL equivalent, this page provides verified technical context, confirmed pin functions, real-world timing behavior, calibrated input range support, and validated alternative options for signal chain design.
Technical Context
The AD1674AR-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 10 V reference (9.9–10.1 V) feeds a precision scaling network enabling four factory-calibrated input ranges without external components.
Digital interface logic supports both full-control mode (using CE, CS, R/C, A0, 12/8) and stand-alone mode (R/C-triggered), with three-state output buffers configurable for 12-bit parallel or dual 8-bit byte reads. Conversion timing is deterministic: 10 µs for 12-bit cycles, with STS status flag and aperture jitter of 250 ps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes with no missing codes guaranteed. |
| Sampling Rate | 100 kSPS - enables real-time capture of signals up to 50 kHz (Nyquist-limited) with 1 µs acquisition time. |
| INL / DNL | ±1 LSB / no missing codes - ensures monotonicity and end-point linearity critical for closed-loop control feedback. |
| S/(N+D) Ratio | 69 dB (typ.) - supports dynamic signal fidelity in vibration monitoring and audio-band instrumentation. |
| Input Ranges | ±5 V, ±10 V, 0–10 V, 0–20 V - eliminates need for external gain/attenuation networks in multi-range sensor interfaces. |
| Supply Voltages | +5 V (VLOGIC), ±12 V or ±15 V (VCC/VEE) - compatible with standard industrial power rails and isolated analog domains. |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, motor drives, and embedded test equipment environments. |
Pinout & Package
AD1674AR-REEL is supplied in a 28-lead plastic SOIC (R-28) package with 0.3-inch body width and standard JEDEC MS-013AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | Logic supply input | Accepts +4.5 V to +5.5 V; powers internal CMOS logic and output buffers-must be decoupled locally. |
| 12/8 (Pin 2) | Digital format control | LOW configures dual 8-bit read; HIGH enables single 12-bit parallel output-determines bus interface strategy. |
| CS (Pin 3) | Chip select input | Active LOW; enables conversion or read when CE is HIGH-used for multi-device bus arbitration. |
| A0 (Pin 4) | Byte address / cycle length | LOW initiates 12-bit conversion; HIGH triggers 8-bit cycle-also selects MSB/LSB byte during read. |
| R/C (Pin 5) | Read/Convert control | LOW starts conversion in full-control mode; falling edge triggers conversion in stand-alone mode. |
| CE (Pin 6) | Chip enable input | Active HIGH; latches control inputs and enables internal clock-must meet 50 ns setup/hold vs. CS/R/C. |
| VCC (Pin 7) | Analog positive supply | +11.4 V to +16.5 V; powers SHA, DAC, and comparator-requires low-noise regulation and filtering. |
| REF OUT (Pin 8) | 10 V reference output | Provides 9.9–10.1 V at ≤2 mA; used to bias BIP OFF and REF IN-must be buffered for ±12 V operation. |
| AGND (Pin 9) | Analog ground | Reference node for analog inputs and internal circuitry-must be separated from DGND with single-point tie. |
| REF IN (Pin 10) | Reference input | Connected via 50 Ω resistor to REF OUT for calibration; sets full-scale scaling for all input ranges. |
| VEE (Pin 11) | Analog negative supply | –16.5 V to –11.4 V; powers analog core-critical for bipolar input accuracy and THD performance. |
| BIP OFF (Pin 12) | Bipolar offset adjust | Connected via 50 Ω to REF OUT for ±5 V/±10 V modes; tied to AGND for unipolar operation. |
| 10 VIN (Pin 13) | 10 V span analog input | Accepts 0–10 V (unipolar) or ±5 V (bipolar); unused in 20 V span mode-input impedance = 3–7 kΩ. |
| 20 VIN (Pin 14) | 20 V span analog input | Accepts 0–20 V (unipolar) or ±10 V (bipolar); unused in 10 V span mode-input impedance = 6–14 kΩ. |
| DGND (Pin 15) | Digital ground | Return path for logic outputs and VLOGIC-separate from AGND to prevent digital noise coupling. |
| DB0–DB3 (Pins 16–19) | Data outputs (LSB) | Active only when A0 = HIGH and 12/8 = LOW-output 4 LSBs followed by four trailing zeroes. |
| DB4–DB7 (Pins 20–23) | Data outputs (mid-byte) | Active when A0 = LOW (MSB byte) or A0 = HIGH (zero-padded mid-byte)-3-state controlled by CE/R/C. |
| DB8–DB11 (Pins 24–27) | Data outputs (MSB) | Provide upper 4 bits in all configurations-enabled during read when CE and CS are asserted. |
| STS (Pin 28) | Status output | Active HIGH during conversion; falls 0.6–1.2 µs after data valid-used for interrupt-driven or polled read timing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated sample-and-hold amplifier | Supports full Nyquist bandwidth (500 kHz) with 1 µs acquisition time-eliminates need for external SHA and reduces board area. |
| Factory-calibrated input ranges | Four ranges (±5 V, ±10 V, 0–10 V, 0–20 V) trimmed via laser-trimmed resistors-enables plug-and-play sensor interfacing without recalibration. |
| AC and DC parameter guarantee | Specified S/(N+D) = 69 dB, THD = –90 dB, and INL = ±1 LSB across temperature-validates performance in both spectral analysis and precision measurement. |
| Flexible microprocessor interface | Configurable 12-bit parallel or dual 8-bit read with 3-state buffers-directly connects to 8-bit or 16-bit buses without glue logic. |
| Industry-standard pinout | PIN-compatible with AD574A/AD674A-allows drop-in replacement in legacy designs while adding sampling capability and faster conversion. |
Applications
| Industrial Data Acquisition | Motor Control Feedback |
|---|---|
|
Use Scenario: High-accuracy voltage and current sensing in PLC analog input modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized multi-channel analog signals at 100 kSPS with deterministic 10 µs conversion latency. Use Value: ±1 LSB INL and –90 dB THD ensure precise torque estimation and fault detection in servo drives without post-processing correction. |
Use Scenario: Real-time phase current sampling in three-phase inverter gate drivers for field-oriented control (FOC). IC Role / Device Role / Timing Role: Bipolar-input ADC acquiring ±5 V current sense signals with 1 µs acquisition window aligned to PWM dead-time. Use Value: Integrated SHA and 250 ps aperture jitter preserve current waveform integrity, enabling <1% torque ripple in closed-loop operation. |
| Test & Measurement Equipment | Avionics Signal Conditioning |
|
Use Scenario: Input stage of portable multimeters and handheld oscilloscopes requiring multi-range DC/AC voltage measurement. IC Role / Device Role / Timing Role: Configurable-range ADC supporting auto-ranging via software-controlled BIP OFF and 12/8 pin selection. Use Value: Single-chip solution with on-board 10 V reference and calibrated scaling reduces BOM count and improves long-term drift stability. |
Use Scenario: Sensor interface in flight control computers processing analog transducer outputs (pressure, temperature, position). IC Role / Device Role / Timing Role: Ruggedized ADC operating from –40°C to +85°C with MIL-STD-883 screening option for DO-160 compliance. Use Value: Guaranteed 69 dB S/(N+D) and full AC/DC specs across temperature enable certified airworthiness without derating. |
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 |
|---|---|---|---|
| AD1674BR-REEL | ±1/2 LSB INL (vs. ±1 LSB), 70 dB S/(N+D) (vs. 69 dB), same package/temp grade | Higher linearity required in metrology-grade calibration systems where code-edge errors impact traceability | Select AD1674BR-REEL when system-level INL budget is <0.5 LSB or THD must exceed –90 dB consistently. |
| AD7892BR-REEL | 12-bit, 200 kSPS, single +5 V supply, no internal reference, serial SPI interface | Lower power, smaller footprint, and simplified supply needed in battery-powered portable instruments | Choose AD7892BR-REEL when board space, power (<30 mW), or single-supply operation outweighs need for bipolar input and on-chip reference. |
Compared with AD1674BR-REEL, the AD1674AR-REEL trades 0.5 LSB linearity for broader availability and lower cost in industrial DAQ; versus AD7892BR-REEL, it retains ±12 V analog supplies, integrated SHA, and parallel interface-critical for deterministic timing in real-time control loops.
Availability
AD1674AR-REEL is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback, test & measurement equipment, and avionics signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD1674AR-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, founded in 1965 and headquartered in Wilmington, MA.
The AD1674 product line was designed for precision, AC/DC-specified data acquisition in industrial, aerospace, and instrumentation systems-emphasizing integrated functionality, wide input range flexibility, and robust operation across military-grade temperature extremes.
FAQ
What input voltage ranges does the AD1674AR-REEL support?
The AD1674AR-REEL supports four factory-calibrated input ranges: ±5 V and ±10 V bipolar modes, plus 0 V–10 V and 0 V–20 V unipolar modes. Range selection is determined by connection of BIP OFF (to REF OUT for bipolar, AGND for unipolar) and routing of the analog signal to either 10 VIN or 20 VIN pins-no external resistors are needed for scaling. The AD1674AR-REEL's internal laser-trimmed resistor network ensures accuracy within ±1 LSB INL across all ranges.
How does the AD1674AR-REEL handle conversion timing in stand-alone mode?
In stand-alone mode, the AD1674AR-REEL uses R/C as the sole control signal: a falling edge initiates conversion, STS goes HIGH after 200 ns, and data becomes valid 1 µs after STS falls. CE and 12/8 are tied HIGH, CS and A0 are tied LOW. This eliminates bus contention and reduces aperture jitter to 250 ps-critical for high-fidelity spectral analysis. The AD1674AR-REEL's deterministic 10 µs conversion time remains unchanged regardless of mode.
Is the AD1674AR-REEL pin-compatible with older industry-standard converters?
Yes-the AD1674AR-REEL maintains identical pinout and electrical interface compatibility with the AD574A and AD674A, including shared signal names (CS, CE, R/C, A0, 12/8, STS, DB0–DB11). It extends functionality with an integrated sample-and-hold amplifier and faster 10 µs conversion time while preserving PCB layout reuse. No trace modifications or component changes are required when upgrading from AD574A/AD674A to AD1674AR-REEL in existing designs.
What power supply configuration is required for bipolar operation of the AD1674AR-REEL?
For bipolar operation (±5 V or ±10 V input ranges), the AD1674AR-REEL requires three independent supplies: +5 V on VLOGIC (Pin 1), +12 V or +15 V on VCC (Pin 7), and –12 V or –15 V on VEE (Pin 11). AGND (Pin 9) and DGND (Pin 15) must be connected at a single point near the device. REF OUT (Pin 8) must be connected via a 50 Ω resistor to both REF IN (Pin 10) and BIP OFF (Pin 12) to establish proper offset nulling-this configuration is validated in the AD1674AR-REEL datasheet Figure 11.
Does the AD1674AR-REEL include an internal voltage reference, and can it be used externally?
Yes-the AD1674AR-REEL integrates a precision 10 V bandgap reference (9.9–10.1 V, ±0.1% initial accuracy) on chip, available at REF OUT (Pin 8) with up to 2 mA output current. It is used internally to scale all input ranges and can drive external circuitry-however, Analog Devices specifies that REF OUT must be buffered (e.g., with an op-amp voltage follower) when operating with ±12 V supplies to maintain regulation stability and avoid loading-induced errors. The AD1674AR-REEL's reference is not user-adjustable but is factory-trimmed for minimal drift.
AD1674AR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD1674AR-REEL FAQ
1.How can I place an order for AD1674AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1674AR-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 AD1674AR-REEL reliable?
The price and inventory of AD1674AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1674AR-REEL is usually 5 days.
3.What payment methods are accepted for AD1674AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1674AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1674AR-REEL?
AD1674AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1674AR-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 AD1674AR-REEL?
For technical support, including AD1674AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1674AR-REEL requirements.
6.How does Aetrix verify that AD1674AR-REEL is sourced from the original manufacturer or authorized distributors?
All AD1674AR-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 AD1674AR-REEL meets industry standards.
7.What is the process for return or replacement of AD1674AR-REEL?
All AD1674AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1674AR-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 AD1674AR-REEL part is unused and in its original packaging.
Return procedure for AD1674AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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