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Analog Devices Inc. AD574AKP-REEL
- Part No.:
- AD574AKP-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD574AKP-REEL.pdf
- Description:
- IC ADC 12BIT SAR 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,119
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Product details
Overview
AD574AKP-REEL from Analog Devices is a monolithic 12-bit 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 achieves ≤35 µs full-scale conversion time. It is used in precision data acquisition systems requiring self-contained, high-accuracy digitization without external DAC or reference components.
For engineers reviewing the AD574AKP-REEL datasheet, AD574AKP-REEL pinout, AD574AKP-REEL application, or AD574AKP-REEL equivalent, key selection considerations include guaranteed 12-bit no-missing-codes performance, internal 10.00 V ±0.2% Zener reference, ±12 V/±15 V dual-supply operation, and PLCC-28 package compatibility with microprocessor bus interfaces.
Technical Context
The AD574AKP-REEL integrates a 12-bit current-output DAC, temperature-compensated buried Zener reference, comparator, and successive-approximation register (SAR) in a single chip. Its SAR architecture sequences bit weights from MSB to LSB using internal clocking, delivering deterministic 8-bit (≤24 µs) or 12-bit (≤35 µs) conversions controlled via CE/CS/R/C/A0 logic.
It supports dual data modes: 12-bit parallel output (12/8 = VLOGIC) or 8-bit byte-accessed output (12/8 = DIGITAL COMMON), with AO selecting MSB nibble (AO = 0) or LSB nibble + trailing zeros (AO = 1). STS pin provides real-time conversion status, and internal thin-film resistors are laser-trimmed for absolute calibration across input spans.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete digital codes with monotonic transfer function. |
| Linearity Error (TMIN–TMAX) | ±1/2 LSB - guarantees maximum deviation of any code from ideal straight-line transfer, enabling accurate system-level calibration. |
| Differential Linearity | No missing codes to 12 bits - ensures all 4096 codes appear across full temperature range, critical for closed-loop control fidelity. |
| Input Ranges | Unipolar: 0 V to +10 V or 0 V to +20 V; Bipolar: ±5 V or ±10 V - selectable via pin-strapping, eliminating external scaling circuitry. |
| Internal Reference | 10.00 V ±0.2% - trimmed Zener source supplies 1.5 mA, enabling direct REF IN connection without external buffer at ±15 V supplies. |
| Conversion Time | ≤35 µs (12-bit), ≤24 µs (8-bit) - deterministic timing allows precise synchronization with host processor read cycles. |
| Supply Voltages | VLOGIC = +4.5 V to +5.5 V; VCC = +11.4 V to +16.5 V; VEE = –11.4 V to –16.5 V - supports standard ±12 V or ±15 V industrial rails. |
Pinout & Package
AD574AKP-REEL is housed in a 28-lead plastic leaded chip carrier (PLCC) package (P-28A), with leads arranged in a square J-lead configuration suitable for surface-mount assembly and socketing. The package provides thermal and electrical performance optimized for mixed-signal PCB layouts with separate analog/digital ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | DIGITAL COMMON | Logic ground reference for VLOGIC and digital interface signals; must be tied to system digital ground. |
| 9 | ANALOG COMMON | High-fidelity ground reference for internal reference and analog input; requires low-impedance connection to analog ground plane. |
| 8, 10 | REF OUT / REF IN | 10 V reference output and input node; enables internal reference use or external reference override with fixed 50 Ω resistor for full-scale trim. |
| 13, 14 | 10VIN / 20VIN | Analog input terminals for 10 V or 20 V unipolar spans; input impedance is 5 kΩ (10VIN) or 10 kΩ (20VIN). |
| 6 | BIP OFF | Bipolar offset adjustment node; connected to REF OUT for ±5 V/±10 V operation, grounded for unipolar mode. |
| 2–5, 7, 11–12, 16–20, 22–28 | DB0–DB11, STS, CE, CS, R/C, A0, 12/8 | 12-bit tri-state data outputs (DB0–DB11), status flag (STS), and asynchronous control inputs - enable direct MPU bus interfacing without glue logic. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 10.00 V reference | Eliminates need for external voltage reference IC or trimming network, reducing BOM count and layout area in space-constrained designs. |
| Guaranteed 12-bit no-missing-codes | Ensures monotonicity across full operating temperature range (0°C to +70°C), preventing data glitches in servo control or feedback loops. |
| Selectable 8-/12-bit conversion mode | Reduces conversion latency to ≤24 µs when 8-bit resolution suffices, improving throughput in real-time monitoring applications. |
| Tri-state parallel data outputs | Enables direct connection to shared microprocessor data buses without external bus transceivers, simplifying interface design and lowering power. |
| Laser-trimmed thin-film resistors | Provides factory-calibrated gain and offset accuracy, minimizing field calibration effort and supporting plug-and-play integration into test equipment. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous digitization of 4–20 mA loop signals conditioned to 0 V–10 V range in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC performing high-accuracy, low-drift analog input capture with built-in reference stability. Use Value: ±1/2 LSB linearity and 12-bit no-missing-codes guarantee measurement repeatability within ±0.025% FS across ambient temperature swings. | Use Scenario: High-speed parametric testing of semiconductor devices using programmable voltage sources and precision digitizers. IC Role / Device Role / Timing Role: Standalone digitizer stage capturing transient waveforms with deterministic ≤35 µs conversion latency. Use Value: Internal clock and SAR architecture eliminate external timing component dependencies, reducing test head complexity and jitter. |
| Medical Instrumentation | Aerospace Data Acquisition |
Use Scenario: Digitizing biopotential signals (ECG, EEG) amplified to ±5 V range in portable diagnostic devices. IC Role / Device Role / Timing Role: Bipolar-mode ADC providing DC-coupled, high-common-mode-rejection signal capture with calibrated offset. Use Value: Adjustable bipolar offset (±4 LSB max) and ±1/2 LSB linearity support sub-millivolt signal resolution required for clinical-grade diagnostics. | Use Scenario: Onboard sensor telemetry in UAV flight controllers digitizing inertial and environmental sensor outputs. IC Role / Device Role / Timing Role: Ruggedized ADC operating from ±12 V supplies with stable reference for long-duration missions. Use Value: Internal Zener reference with 27 ppm/°C full-scale TC ensures <±0.01% FS drift over –40°C to +85°C extended ambient conditions. |
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 10 µs conversion time, integrated track/hold, and 5 V single-supply operation. | Requires no external SHA but lacks internal reference; needs external 2.5 V reference and ±5 V analog supply for bipolar inputs. | Preferred for compact, low-power systems where speed >35 µs is critical and bipolar operation is not required. |
| MAX195BCNG+ | 16-bit SAR ADC with 3.5 µs conversion, internal reference, and SPI interface; operates from +5 V only. | Higher resolution and faster throughput, but serial interface increases MCU overhead and eliminates direct parallel bus access. | Selected when resolution >12 bits is mandatory and system architecture supports serial peripheral interfacing. |
Compared with AD7874KN and MAX195BCNG+, the AD574AKP-REEL offers unique value in legacy microprocessor-based systems requiring parallel 12-bit data capture, self-contained ±15 V operation, and guaranteed no-missing-codes performance without external timing or reference components.
Availability
AD574AKP-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, medical instrumentation, and aerospace data acquisition requiring stable component supply and long-term obsolescence management.
Supply support for AD574AKP-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, serving industrial, automotive, communications, and healthcare markets.
The AD574A product line was designed for precision, self-contained data acquisition in resource-constrained embedded systems-delivering complete 12-bit ADC functionality with integrated reference, clock, and bus-compatible outputs.
FAQ
What is the operating temperature range for the AD574AKP-REEL?
The AD574AKP-REEL is rated for operation from 0°C to +70°C. This commercial-grade temperature specification is confirmed in the AD574A Ordering Guide, where the "K" grade explicitly denotes 0°C to +70°C with ±1/2 LSB linearity error and 12-bit no-missing-codes guarantee across that range. The PLCC package (P-28A) is qualified for this range per Analog Devices' packaging specifications.
Does the AD574AKP-REEL require an external reference voltage?
No, the AD574AKP-REEL does not require an external reference voltage. It incorporates a temperature-compensated buried Zener reference trimmed to 10.00 V ±0.2%, capable of sourcing up to 1.5 mA. REF OUT (Pin 8) can directly drive REF IN (Pin 10) via a 50 Ω resistor for full-scale calibration, eliminating external reference ICs in most ±15 V supply configurations.
How is the AD574AKP-REEL interfaced to an 8-bit microprocessor bus?
The AD574AKP-REEL supports 8-bit bus interfacing via its 12/8 and A0 pins. When 12/8 is tied to DIGITAL COMMON, data appears as two 8-bit words: A0 = 0 enables DB11–DB4 (MSB byte), and A0 = 1 enables DB3–DB0 followed by four trailing zeros (LSB nibble). This eliminates external multiplexers or latches, enabling direct connection to common 8-bit MPU data buses.
What is the conversion time of the AD574AKP-REEL in 12-bit mode?
The AD574AKP-REEL has a maximum conversion time of 35 µs in full 12-bit mode, with typical performance at 24 µs. This value is specified in the AD574A Timing section under "tC Conversion Time" for the 12-Bit Cycle, and applies across the full 0°C to +70°C operating range for the K-grade device. The timing is deterministic and independent of input signal level.
Can the AD574AKP-REEL operate from ±12 V supplies instead of ±15 V?
Yes, the AD574AKP-REEL supports ±12 V supplies: VCC = +11.4 V to +16.5 V and VEE = –11.4 V to –16.5 V per Absolute Maximum Ratings. However, when using ±12 V, the internal reference output current capability drops, and Analog Devices recommends buffering REF OUT with an op amp (e.g., AD708) to maintain 1.5 mA load stability during conversion, as noted in the "Reference Output Current" specification footnote.
AD574AKP-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- 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-PLCC (11.51x11.51)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD574AKP-REEL FAQ
1.How can I place an order for AD574AKP-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD574AKP-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 AD574AKP-REEL reliable?
The price and inventory of AD574AKP-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD574AKP-REEL is usually 5 days.
3.What payment methods are accepted for AD574AKP-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD574AKP-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD574AKP-REEL?
AD574AKP-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD574AKP-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 AD574AKP-REEL?
For technical support, including AD574AKP-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD574AKP-REEL requirements.
6.How does Aetrix verify that AD574AKP-REEL is sourced from the original manufacturer or authorized distributors?
All AD574AKP-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 AD574AKP-REEL meets industry standards.
7.What is the process for return or replacement of AD574AKP-REEL?
All AD574AKP-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD574AKP-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 AD574AKP-REEL part is unused and in its original packaging.
Return procedure for AD574AKP-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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