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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. AD574AKN

Name: AD574AKN
Brand: Analog Devices Inc.
SKU: AD574AKN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD574AKN

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 28-DIP (0.600", 15.24mm)

Datasheet:: AD574AKN.pdf

Description:: IC ADC 12BIT SAR 28DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD574AKN from Analog Devices is a complete 12-bit monolithic successive-approximation analog-to-digital converter (ADC) with on-chip reference, clock, and tri-state data outputs. It delivers ±1/2 LSB linearity error over 0°C to +70°C, supports unipolar (0 V to +10 V or 0 V to +20 V) and bipolar (±5 V or ±10 V) input ranges, and operates from ±12 V or ±15 V analog supplies plus +5 V logic supply - widely used in industrial data acquisition, test equipment, and process control systems.

For engineers reviewing the AD574AKN datasheet, AD574AKN pinout, AD574AKN application, or AD574AKN equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance, internal 10.00 V ±0.2% Zener reference, 35 µs max 12-bit conversion time, and compatibility with 8-bit or 12-bit parallel microprocessor buses via configurable AO and 12/8 control pins.

Technical Context

The AD574AKN implements a fully self-contained successive-approximation architecture with an internal 12-bit current-output DAC, comparator, SAR register, and temperature-compensated buried Zener reference. Its analog front-end includes dual input scaling resistors (5 kΩ for 10 V span, 10 kΩ for 20 V span) and a dedicated bipolar offset resistor (10 kΩ), enabling direct interface to unipolar or bipolar signals without external gain/level-shifting components.

Digital control uses CE/CS/R/C/AO/12/8 signals to manage conversion initiation, byte addressing, and output format selection - supporting both 12-bit parallel readout and 8-bit nibble-mode access. The STS status flag provides end-of-conversion indication, and all digital inputs meet standard TTL voltage thresholds except 12/8, which must be hard-wired to VLOGIC or DIGITAL COMMON.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12 bits - delivers 4096 discrete output codes with monotonic transfer function across full temperature range.
Linearity Error (T_MIN–T_MAX)	±1/2 LSB - ensures maximum deviation of any code from ideal straight-line transfer is ≤0.5 least-significant bit.
No Missing Codes	Guaranteed to 12 bits - all 4096 codes appear in monotonic sequence over 0°C to +70°C operating range.
Conversion Time (12-bit)	15 µs (typ), 35 µs (max) - enables sampling rates up to ~28.6 kSPS in burst mode with proper timing margins.
Internal Reference Voltage	10.00 V ±0.2% - trimmed buried Zener source stable over time and temperature; supplies up to 1.5 mA to external loads.
Power Supply Range	V_CC: +11.4 V to +16.5 V; V_EE: –16.5 V to –11.4 V; V_LOGIC: +4.5 V to +5.5 V - supports operation from ±12 V or ±15 V analog rails.
Analog Input Ranges	Unipolar: 0 V to +10 V or 0 V to +20 V; Bipolar: ±5 V or ±10 V - selectable via pin-strapping without external components.

Pinout & Package

AD574AKN is packaged in a 28-pin plastic DIP (N-28), with 0.6-inch wide body and standard through-hole footprint compatible with industry-standard sockets and PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	Digital Common (DC)	Reference ground for logic supply and digital I/O; must be connected to system digital ground plane.
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13	DB11–DB0 (Data Outputs)	Tri-state parallel digital outputs; DB11 = MSB, DB0 = LSB; enabled only after conversion completion.
14	STS (Status)	Active-high signal indicating conversion in progress; goes low at end-of-convert to enable data read.
16	CE (Chip Enable)	Primary enable for conversion start or data read; falling edge initiates operation when CS and R/C are asserted.
17	CS (Chip Select)	Secondary enable; must be low during CE assertion to activate device control logic.
18	R/C (Read/Convert)	Low = initiate conversion; high = enable data output buffers; controls functional mode with CE/CS.
19	A0 (Byte Address)	Selects output nibble: low = enable DB11–DB4 (MSBs); high = enable DB3–DB0 + four trailing zeros (LSBs).
20	12/8 (Data Mode)	Hard-wired to VLOGIC = 12-bit parallel output; to DC = two 8-bit words - not TTL-compatible.
21	REF OUT	10.00 V reference output; buffered internally; supplies up to 1.5 mA but load must remain constant during conversion.
22	REF IN	Reference input node; accepts external reference or connects to REF OUT for internal reference use.
23	BIP OFF	Bipolar offset adjustment point; grounded for unipolar mode; tied to REF OUT for bipolar operation.
24	10VIN	10 V span analog input; 5 kΩ input impedance; used with 0 V to +10 V or ±5 V signals.
25	20VIN	20 V span analog input; 10 kΩ input impedance; used with 0 V to +20 V or ±10 V signals.
26	ANA COM (AC)	Analog common - reference ground for internal reference, comparator, and analog inputs; must be isolated from digital ground except at single-point package tie.
27	V_EE	Negative analog supply rail; –11.4 V to –16.5 V; powers internal DAC, comparator, and reference circuitry.
28	V_CC	Positive analog supply rail; +11.4 V to +16.5 V; powers internal DAC, comparator, and reference circuitry.

Key Features

Feature	Design Value
On-chip 10.00 V reference	Eliminates need for external precision reference; ±0.2% initial accuracy and low drift support stable full-scale calibration.
Configurable 12-/8-bit interface	Supports direct connection to 8-bit microprocessors via AO/12/8 control without glue logic or bus transceivers.
Guaranteed no missing codes	Ensures monotonicity and deterministic code mapping across full 12-bit range - critical for closed-loop control applications.
Internal clock and SAR	Removes requirement for external clock generation or timing control circuitry; simplifies PCB layout and reduces BOM count.
Multiple input range support	Hardware-selectable unipolar/bipolar modes with built-in scaling resistors reduce external component count and calibration complexity.

Applications

Industrial Process Monitoring	Automated Test Equipment (ATE)
Use Scenario: Continuous digitization of 4–20 mA loop signals conditioned to ±10 V using precision op-amps and isolation amplifiers. IC Role / Device Role / Timing Role: Primary ADC capturing sensor outputs at 1–10 kSPS with guaranteed monotonicity and minimal calibration overhead. Use Value: ±1/2 LSB linearity and 12-bit no-missing-codes guarantee accurate representation of small signal changes in PID feedback loops.	Use Scenario: High-accuracy voltage/current measurement subsystem in benchtop multimeters and parametric analyzers. IC Role / Device Role / Timing Role: Standalone ADC interfaced to FPGA or microcontroller for synchronized multi-channel sampling with STS-driven handshaking. Use Value: Internal 10.00 V reference and ±1/2 LSB error enable traceable measurements without external reference calibration.
Medical Instrumentation	Avionics Data Acquisition
Use Scenario: Digitizing ECG, EEG, or pressure transducer outputs in portable diagnostic devices requiring low power and high reliability. IC Role / Device Role / Timing Role: Signal-chain ADC operating from ±12 V supplies with unipolar 0–5 V input range and 35 µs conversion latency. Use Value: Low power dissipation (390–725 mW) and robust supply rejection (±1 LSB full-scale shift over V_CC/V_EE variation) ensure stable operation in battery-powered systems.	Use Scenario: Sensor data capture from accelerometers, gyros, and environmental monitors in flight control computers. IC Role / Device Role / Timing Role: Ruggedized ADC performing periodic sampling under MIL-STD-883 screening conditions (K-grade variant). Use Value: Guaranteed 0°C to +70°C performance with ±1/2 LSB linearity supports deterministic timing and repeatability in safety-critical avionics subsystems.

Industrial Process Monitoring

Automated Test Equipment (ATE)

Use Scenario: Continuous digitization of 4–20 mA loop signals conditioned to ±10 V using precision op-amps and isolation amplifiers.

IC Role / Device Role / Timing Role: Primary ADC capturing sensor outputs at 1–10 kSPS with guaranteed monotonicity and minimal calibration overhead.

Use Value: ±1/2 LSB linearity and 12-bit no-missing-codes guarantee accurate representation of small signal changes in PID feedback loops.

Use Scenario: High-accuracy voltage/current measurement subsystem in benchtop multimeters and parametric analyzers.

IC Role / Device Role / Timing Role: Standalone ADC interfaced to FPGA or microcontroller for synchronized multi-channel sampling with STS-driven handshaking.

Use Value: Internal 10.00 V reference and ±1/2 LSB error enable traceable measurements without external reference calibration.

Medical Instrumentation

Avionics Data Acquisition

Use Scenario: Digitizing ECG, EEG, or pressure transducer outputs in portable diagnostic devices requiring low power and high reliability.

IC Role / Device Role / Timing Role: Signal-chain ADC operating from ±12 V supplies with unipolar 0–5 V input range and 35 µs conversion latency.

Use Value: Low power dissipation (390–725 mW) and robust supply rejection (±1 LSB full-scale shift over V_CC/V_EE variation) ensure stable operation in battery-powered systems.

Use Scenario: Sensor data capture from accelerometers, gyros, and environmental monitors in flight control computers.

IC Role / Device Role / Timing Role: Ruggedized ADC performing periodic sampling under MIL-STD-883 screening conditions (K-grade variant).

Use Value: Guaranteed 0°C to +70°C performance with ±1/2 LSB linearity supports deterministic timing and repeatability in safety-critical avionics subsystems.

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 SAR ADC with serial SPI interface; no internal reference; requires external 2.5 V reference and clock.	Lower pin count (28-pin PLCC), reduced board space, but adds external reference and timing design complexity.	Choose AD7874KN when system already uses SPI infrastructure and external reference is available; avoid if minimizing BOM or simplifying layout is priority.
ADS7800KP	12-bit SAR ADC with internal reference; 10 µs conversion time; CMOS process; single +5 V supply operation.	Eliminates dual ±12/±15 V analog rails; lower power (120 mW); but lacks bipolar input support and has ±1 LSB linearity.	Choose ADS7800KP for low-voltage, low-power embedded systems where bipolar range is unnecessary and faster throughput is required.

Compared with AD574AKN, AD7874KN shifts design burden to external timing and reference management while reducing interface complexity, whereas ADS7800KP eliminates dual-supply requirements and cuts power by >60% but sacrifices guaranteed 12-bit monotonicity and bipolar capability.

Availability

AD574AKN 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 guaranteed 12-bit monotonic performance.

Supply support for AD574AKN 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 (DSP) semiconductors, serving industrial, communications, automotive, and aerospace markets.

The AD574A product line was designed as a self-contained, pin-compatible family of 12-bit ADCs targeting applications demanding guaranteed monotonicity, integrated reference stability, and minimal external component count - especially in legacy industrial and military systems.

FAQ

What is the operating temperature range for the AD574AKN?

The AD574AKN is rated for operation from 0°C to +70°C. This K-grade specification guarantees ±1/2 LSB linearity error and 12-bit no-missing-codes performance across the full industrial temperature range, making it suitable for non-military commercial and industrial environments where extended thermal stability is required without mil-spec screening.

Does the AD574AKN require external components to operate?

No, the AD574AKN is a complete 12-bit ADC requiring no external clock, reference, or timing components. It integrates a temperature-compensated 10.00 V Zener reference, internal successive-approximation register, DAC, comparator, and tri-state output buffers. Only power supplies (+5 V, +12/+15 V, –12/–15 V), analog input connections, and control signals (CE, CS, R/C, A0, 12/8) are needed for full functionality.

How does the AD574AKN support both 8-bit and 12-bit microprocessor interfaces?

The AD574AKN uses the A0 and 12/8 pins to configure data output format: A0 selects MSB or LSB nibble, while 12/8 determines whether DB11–DB0 appear as one 12-bit word (12/8 = VLOGIC) or two 8-bit bytes (12/8 = DC). This allows direct connection to 8-bit buses without external latches or transceivers, and supports 12-bit parallel reads in systems with wider data paths.

Can the AD574AKN operate from ±12 V supplies instead of ±15 V?

Yes, the AD574AKN supports VCC = +11.4 V to +16.5 V and VEE = –16.5 V to –11.4 V, explicitly including ±12 V operation. However, when using ±12 V supplies, the internal reference output current capability drops, and Analog Devices recommends buffering the REF OUT with an op amp if external loading exceeds 1 mA or varies during conversion - ensuring full-scale accuracy remains within ±0.25% FS.

What is the significance of "no missing codes guaranteed to 12 bits" for the AD574AKN?

"No missing codes guaranteed to 12 bits" means that over the full 0°C to +70°C temperature range, every one of the 4096 possible 12-bit digital output codes appears in strict monotonic order as the analog input sweeps from minimum to maximum. This eliminates code ambiguities in closed-loop control, ensures predictable behavior in real-time systems, and is a key differentiator versus lower-grade variants like AD574AJN, which guarantee no missing codes only to 11 bits.

AD574AKN 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):: -

Number of Inputs:: 1

Input Type:: Single Ended

Data Interface:: Parallel

Configuration:: ADC

Ratio - S/H:ADC:: -

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:: -

AD574AKN FAQ

1.How can I place an order for AD574AKN through Aetrix?

Please submit a Request for Quotation (RFQ) for AD574AKN 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 AD574AKN reliable?

The price and inventory of AD574AKN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574AKN is usually 5 days.

3.What payment methods are accepted for AD574AKN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574AKN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD574AKN?

AD574AKN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD574AKN 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 AD574AKN?

For technical support, including AD574AKN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574AKN requirements.

6.How does Aetrix verify that AD574AKN is sourced from the original manufacturer or authorized distributors?

All AD574AKN 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 AD574AKN meets industry standards.

7.What is the process for return or replacement of AD574AKN?

All AD574AKN units undergo pre-shipment inspection (PSI). If there is an issue with AD574AKN, 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 AD574AKN part is unused and in its original packaging.

Return procedure for AD574AKN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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