My Inquiry
My Account
Analog Devices Inc. AD573SD
- Part No.:
- AD573SD
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD573SD.pdf
- Description:
- IC ADC 10BIT SAR 20CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD573SD from Analog Devices is a complete 10-bit successive approximation analog-to-digital converter (ADC) with integrated buried Zener reference, on-chip clock, comparator, DAC, and SAR - requiring no external components for full-accuracy conversion. It operates on +5 V and –12 V to –15 V supplies, accepts 0 V to +10 V unipolar or –5 V to +5 V bipolar analog inputs, and delivers conversion in 20 µs typical, with ±1 LSB relative accuracy over –55°C to +125°C.
For engineers reviewing the AD573SD datasheet, AD573SD pinout, AD573SD application, or AD573SD equivalent, this page provides verified technical context, MIL-STD-883B-compliant specifications, hermetic ceramic DIP package details, microprocessor bus interface timing, and validated alternatives for high-reliability data acquisition systems in aerospace, defense, and industrial control.
Technical Context
The AD573SD implements successive approximation using integrated injection logic (I2L) SAR architecture, with a laser-trimmed SiCr thin-film resistor ladder and temperature-compensated subsurface Zener reference ensuring ±1 LSB relative accuracy across –55°C to +125°C. Its 10-bit current-output DAC drives a comparator whose decision sequence determines bit weighting from MSB to LSB.
Conversion is initiated by a trailing-edge–triggered CONVERT pulse (≥500 ns wide); DATA READY (DR) asserts low after completion (~20 µs). Output data is left-justified: DB9–DB2 (8 MSBs) enabled by HBE, DB1–DB0 (2 LSBs) enabled by LBE - supporting both 8-bit bus interfacing and full 10-bit parallel readout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - guarantees monotonic transfer function with no missing codes over full temperature range. |
| Relative Accuracy | ±1 LSB - ensures maximum code transition deviation from ideal line is ≤ 1/2 LSB (0.05% of full scale). |
| Conversion Time | 20 µs typical - enables sampling rates up to ~50 kSPS in burst-mode systems with minimal dead time. |
| Analog Input Ranges | 0 V to +10 V (unipolar) or –5 V to +5 V (bipolar) - selected via Pin 16 (BIP OFF) open or grounded. |
| Supply Voltages | +5 V (V+) and –12 V to –15 V (V–) - dual-rail operation supports direct interfacing to legacy industrial signal chains. |
| Temperature Range | –55°C to +125°C - qualified per MIL-STD-883B, suitable for extended-environment avionics and downhole instrumentation. |
| Package | 20-pin side-brazed ceramic DIP (D-20) - hermetically sealed, low-leakage, high-reliability packaging for harsh environments. |
Pinout & Package
AD573SD is housed in a 20-pin side-brazed ceramic dual in-line package (SBDIP, D-20), hermetically sealed and compliant with MIL-STD-883B mechanical and environmental requirements. The package features gold-plated leads, glass-sealed ceramic body, and 0.300-inch row spacing - optimized for high-vacuum, high-humidity, and thermal shock resilience.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (DB0) | LSB Data Output | Least significant bit of 10-bit output word; enabled only when LBE is low. |
| Pin 2 (DB1) | LSB+1 Data Output | Second least significant bit; part of 2-bit low-byte buffer controlled by LBE. |
| Pin 3–10 (DB2–DB9) | MSB Data Outputs | Bits 2 through 9 (DB2 = 22, DB9 = 29); enabled only when HBE is low. |
| Pin 11 (V–) | Negative Supply | –12 V to –15 V rail powering internal DAC, comparator, and reference circuitry. |
| Pin 12 (ANALOG COMMON) | Analog Reference Node | Return path for analog input current; carries ~2 mA static current post-conversion. |
| Pin 13 (BIPOLAR OFFSET CONTROL) | Input Range Selector | Open = bipolar (–5 V to +5 V); grounded = unipolar (0 V to +10 V). |
| Pin 14 (ANALOG IN) | Differential Input Terminal | Accepts single-ended voltage referenced to ANALOG COMMON; impedance 5 kΩ nominal. |
| Pin 15 (DIGITAL COMMON) | Digital Ground Reference | Logic ground for all digital I/O; isolated from ANALOG COMMON to minimize noise coupling. |
| Pin 16 (CONVERT) | Conversion Start Input | Positive pulse ≥500 ns wide; falling edge initiates SAR cycle; rising edge resets logic and sets DR high. |
| Pin 17 (DATA READY) | Conversion Status Flag | Open-collector output; goes low when conversion completes and data is valid on outputs. |
| Pin 18 (LBE) | Low-Byte Enable | Active-low control for DB0–DB1; must be high during conversion to avoid bus contention. |
| Pin 19 (HBE) | High-Byte Enable | Active-low control for DB2–DB9; enables 8-bit MSB buffer independently of LBE. |
| Pin 20 (V+) | Positive Supply | +5 V rail powering logic, buffers, and internal reference bias circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Buried Zener Reference | Provides <0.5 ppm/°C temperature coefficient and long-term stability without external trimming. |
| No External Components Required | Full 10-bit conversion achieved with only power supplies, analog input, and CONVERT pulse - reduces BOM count and layout complexity. |
| Flexible Microprocessor Interface | Supports 8-bit bus readout (via HBE/LBE split byte) or full 10-bit parallel access - compatible with 6502, 8085, and memory-mapped I/O systems. |
| Bipolar/Unipolar Input Selection | Single-pin configuration (Pin 16) switches between ±5 V offset binary and 0–10 V true binary modes - no external resistors needed. |
| MIL-STD-883B Compliance | Qualified for Class B screening including burn-in, thermal cycling, and hermeticity testing - meets requirements for flight-critical subsystems. |
Applications
| Avionics Sensor Signal Conditioning | Downhole Oil & Gas Instrumentation |
|---|---|
|
Use Scenario: Digitizing pressure, temperature, and vibration sensor outputs in jet engine monitoring units operating at –55°C to +125°C. IC Role / Device Role / Timing Role: Primary ADC capturing analog transducer signals with guaranteed no missing codes and ±1 LSB linearity under thermal stress. Use Value: Eliminates need for external reference or calibration circuitry, reducing SWaP-C while maintaining traceable metrology-grade accuracy per DO-160. |
Use Scenario: Acquiring real-time formation resistivity and gamma-ray detector outputs in drill-string telemetry modules exposed to 150°C wellbore environments. IC Role / Device Role / Timing Role: High-stability A/D converter interfaced to sample-hold amplifiers (e.g., AD582) for precise DC-coupled signal capture. Use Value: Hermetic ceramic DIP package withstands high-pressure hydrocarbon exposure; buried Zener reference maintains accuracy despite thermal gradients. |
| Missile Guidance Control Feedback | Radiation-Hardened Test Equipment |
|
Use Scenario: Converting gyroscope and accelerometer feedback voltages in inertial measurement units (IMUs) subject to shock, vibration, and EMI. IC Role / Device Role / Timing Role: Low-noise, fast-settling ADC providing deterministic 20 µs conversion latency for closed-loop servo control loops. Use Value: Dual-supply operation (+5 V/–15 V) enables direct connection to op-amp front-ends without level-shifting; separate analog/digital commons suppress ground bounce. |
Use Scenario: Calibrating radiation dosimeters and neutron flux monitors in nuclear facility diagnostics equipment requiring long-term calibration stability. IC Role / Device Role / Timing Role: Metrology-grade ADC used as reference standard in automated test systems verifying other converters' linearity and offset. Use Value: Laser-trimmed resistor ladder and subsurface Zener ensure <10 ppm/1000 hrs drift - enabling multi-year calibration intervals without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit successive approximation ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD573S | Same die, non-MIL-qualified version; identical electrical specs but not screened to MIL-STD-883B. | Lacks radiation tolerance, thermal cycling validation, and hermetic seal verification required for space or defense platforms. | Select AD573SD when mission-critical reliability, lot traceability, and military screening are mandatory. |
| MAX1166BCWI+ | 12-bit SAR ADC with internal reference; requires +3.3 V or +5 V single supply; no negative rail support. | Cannot accept –5 V to +5 V bipolar inputs directly; lacks buried Zener stability and extended temperature guarantee. | Choose MAX1166BCWI+ only for commercial-grade, lower-resolution, single-supply systems where size and cost outweigh extreme environmental robustness. |
Compared with AD573S, AD573SD adds MIL-STD-883B screening and hermetic packaging for assured operation in extended temperature and radiation environments; compared with MAX1166BCWI+, it trades resolution and integration for guaranteed 10-bit monotonicity, bipolar input capability, and proven long-term stability in dual-supply industrial architectures.
Availability
AD573SD is available at Aetrix Electronics and suitable for avionics sensor conditioning, downhole instrumentation, missile guidance feedback, radiation-hardened test equipment, and other high-reliability applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AD573SD 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 AD573SD belongs to Analog Devices' legacy precision data acquisition product line, designed specifically for military, aerospace, and industrial applications demanding guaranteed performance over extreme temperature ranges without external calibration.
FAQ
What is the guaranteed temperature range for the AD573SD?
The AD573SD is specified and tested over –55°C to +125°C, with full performance including ±1 LSB relative accuracy, no missing codes, and guaranteed conversion time of 30 µs maximum across this entire range. This qualification is part of its MIL-STD-883B compliance and applies to every unit shipped.
Does the AD573SD require external components to achieve full 10-bit accuracy?
No - the AD573SD integrates a buried Zener reference, on-chip clock, comparator, 10-bit current-output DAC, successive approximation register, and three-state output buffers on a single chip. For basic operation, only +5 V, –12 V to –15 V supplies, analog input, and a CONVERT pulse are required to achieve full 10-bit accuracy per the datasheet.
How does the AD573SD support both unipolar and bipolar input ranges?
The AD573SD selects input range via Pin 16 (BIPOLAR OFFSET CONTROL): grounding it configures 0 V to +10 V unipolar mode; leaving it open configures –5 V to +5 V bipolar mode with offset binary coding. No external resistors or switches are needed - the internal switch injects precise MSB-offset current into the comparator summing node.
What package type is used for the AD573SD?
The AD573SD uses a 20-pin side-brazed ceramic dual in-line package (SBDIP, D-20), hermetically sealed and qualified per MIL-STD-883B. This package provides superior moisture resistance, thermal stability, and mechanical ruggedness compared to plastic DIP or PLCC variants - essential for high-reliability deployment.
Can the AD573SD interface directly to an 8-bit microprocessor bus?
Yes - the AD573SD supports native 8-bit bus interfacing via separate HIGH BYTE ENABLE (Pin 19) and LOW BYTE ENABLE (Pin 18) controls. DB9–DB2 (8 MSBs) are enabled by HBE; DB1–DB0 (2 LSBs) by LBE. This allows reading the 10-bit result as two consecutive 8-bit bytes without external latches or glue logic.
AD573SD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- -
- 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:
- Internal
- Voltage - Supply, Analog:
- +4.5V ~ 7V, -12V ~ 16.5V
- Voltage - Supply, Digital:
- +4.5V ~ 7V, -12V ~ 16.5V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 20-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD573SD FAQ
1.How can I place an order for AD573SD through Aetrix?
Please submit a Request for Quotation (RFQ) for AD573SD 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 AD573SD reliable?
The price and inventory of AD573SD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD573SD is usually 5 days.
3.What payment methods are accepted for AD573SD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD573SD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD573SD?
AD573SD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD573SD 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 AD573SD?
For technical support, including AD573SD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD573SD requirements.
6.How does Aetrix verify that AD573SD is sourced from the original manufacturer or authorized distributors?
All AD573SD 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 AD573SD meets industry standards.
7.What is the process for return or replacement of AD573SD?
All AD573SD units undergo pre-shipment inspection (PSI). If there is an issue with AD573SD, 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 AD573SD part is unused and in its original packaging.
Return procedure for AD573SD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD573SD Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
