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Analog Devices Inc. AD7533SQ
- Part No.:
- AD7533SQ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD7533SQ.pdf
- Description:
- IC DAC 10BIT A-OUT 16CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,139
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Product details
Overview
AD7533SQ from Analog Devices is a 10-bit, 4-quadrant multiplying DAC in a 16-lead CERDIP package, rated for −55°C to +125°C operation, with ±0.2% FSR relative accuracy, 600 ns output settling time, and full CMOS/TTL compatibility - used in precision programmable gain amplifiers and digitally controlled attenuators in aerospace and industrial control systems.
For engineers reviewing the AD7533SQ datasheet, AD7533SQ pinout, AD7533SQ application, or AD7533SQ equivalent, this page delivers verified specifications, military-grade temperature performance, R-2R ladder architecture details, and real-world interface guidance for unipolar/bipolar operation - critical for high-reliability analog signal conditioning designs.
Technical Context
The AD7533SQ implements a monolithic thin-film R-2R ladder with ten CMOS current switches, enabling precise 4-quadrant multiplication where VREF polarity (±10 V) directly determines output sign and scale. Its inverted ladder topology maintains constant leg current regardless of digital input state, ensuring endpoint linearity without external trimming.
It supports both unipolar (2-quadrant) and bipolar (4-quadrant) modes via offset binary coding, delivers 100 nV-s typical glitch impulse, and operates across 5 V to 16 V VDD - with IOUT1/IOUT2 outputs requiring external op-amp feedback via RFB to generate voltage outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - defines 1024 discrete output steps over full-scale range. |
| Relative Accuracy | ±0.2% FSR maximum - ensures worst-case deviation from ideal transfer curve at endpoints, validated across −55°C to +125°C. |
| Settling Time | 600 ns to 0.05% FSR - enables high-speed closed-loop gain control in <1 µs update cycles. |
| VDD Range | 5 V to 16 V - allows direct integration with legacy 5 V TTL or 15 V industrial power rails. |
| Reference Input | ±10 V, 5 kΩ–20 kΩ impedance - supports bidirectional multiplication with polarity-insensitive scaling. |
| Digital Interface | CMOS/TTL compatible inputs (VINH ≥2.4 V, VINL ≤0.8 V) - eliminates level-shifting in mixed-logic systems. |
| Output Leakage | ±5 nA max at IOUT1/IOUT2 - minimizes error in high-impedance feedback networks. |
Pinout & Package
AD7533SQ uses a 16-lead Ceramic Dual In-Line Package (CERDIP, Q-16), hermetically sealed for extended temperature operation (−55°C to +125°C) and high reliability in harsh environments.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| IOUT1 | DAC Current Output | Primary current output node; sinks/sourced based on digital code and VREF polarity - connected to op-amp inverting input for voltage output. |
| IOUT2 | Analog Ground Reference | Current return path; must be tied to system analog ground to maintain ladder reference integrity and minimize common-mode error. |
| GND | Ground | Digital and substrate ground reference; separate from IOUT2 but must share low-impedance analog ground plane. |
| BIT 1 (MSB) to BIT 10 (LSB) | Digital Input Bits | Parallel 10-bit data bus; accepts CMOS/TTL logic levels - no latching required, Schottky protection unnecessary. |
| VDD | Positive Power Supply | Single supply input (5 V–16 V); powers internal CMOS switches and ladder - decoupling capacitor mandatory near pin. |
| VREF | Reference Voltage Input | Bidirectional reference terminal (±10 V); sets full-scale current magnitude and sign - high-impedance input requiring stable source. |
| RFB | Feedback Resistor Terminal | Connects external RFB resistor to op-amp output; establishes gain and converts IOUT to VOUT - value affects linearity and noise. |
Key Features
| Feature | Design Value |
|---|---|
| 4-Quadrant Multiplying Architecture | Enables bipolar output generation (±VREF × D/1024) without external polarity reversal circuitry. |
| Endpoint Linearity | Guaranteed ±0.2% FSR nonlinearity after zero/full-scale adjustment - eliminates need for per-unit calibration. |
| Latch-Free Digital Interface | Direct connection to microcontroller GPIO or FPGA outputs without external latches or buffers - reduces BOM and layout complexity. |
| Military Temperature Rating | −55°C to +125°C operating range with hermetic CERDIP packaging - qualified for avionics, downhole, and defense applications. |
| Low Glitch Impulse | 100 nV-s typical - minimizes transient injection during code transitions, critical for stable AGC and function generator outputs. |
Applications
| Digitally Controlled Attenuator | Programmable Gain Amplifier |
|---|---|
Use Scenario: RF signal path attenuation in radar front-ends where gain must be adjusted in real time under wide temperature swings. IC Role / Device Role / Timing Role: AD7533SQ acts as precision current-controlled shunt element in T-pad or bridged-T attenuator topologies, driven by FPGA-based control logic. Use Value: Maintains ±0.2% FSR accuracy across −55°C to +125°C, eliminating thermal drift compensation firmware and enabling single-point calibration. |
Use Scenario: Closed-loop gain control in instrumentation amplifiers for sensor signal conditioning in oil & gas monitoring systems. IC Role / Device Role / Timing Role: AD7533SQ provides variable feedback resistance via RFB-connected op-amp, translating digital gain commands into analog voltage scaling. Use Value: 600 ns settling enables sub-microsecond gain updates, supporting dynamic range adaptation to rapidly varying sensor outputs. |
| Linear Automatic Gain Control | Function Generator |
Use Scenario: Audio and communication channel leveling where distortion must remain below −80 dB THD+N over full temperature range. IC Role / Device Role / Timing Role: AD7533SQ serves as digitally programmable transconductance element in AGC loop integrators, modulating amplifier bias current. Use Value: Low 5 nA output leakage prevents DC offset accumulation in integrator nodes, preserving long-term loop stability. |
Use Scenario: Waveform synthesis in test equipment requiring programmable amplitude and offset for sine/triangle outputs. IC Role / Device Role / Timing Role: AD7533SQ generates scaled current waveforms synchronized to clocked digital patterns, converted to voltage via fast op-amp. Use Value: 100 nV-s glitch impulse prevents spurious spectral content in synthesized waveforms, meeting <−90 dBc harmonic distortion specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multiplying DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7520JN | Pin-compatible predecessor; higher ±0.5% FSR relative accuracy, no guaranteed 600 ns settling, plastic PDIP only (−40°C to +85°C). | Limited to commercial/industrial ambient conditions; unsuitable for aerospace or extended-temperature deployments. | Select AD7520JN only if cost is primary constraint and temperature range/performance requirements are relaxed. |
| AD558KP | 8-bit DAC with integrated op-amp and reference; no R-2R ladder; ±0.19% FSR, SOIC-16, −40°C to +85°C. | Provides complete voltage-output solution but lacks 4-quadrant multiplication and 10-bit resolution. | Choose AD558KP when board space is constrained and integrated output buffering is preferred over external op-amp flexibility. |
Compared with AD7520JN, AD7533SQ delivers tighter accuracy, faster settling, and extended temperature capability in hermetic packaging; versus AD558KP, it offers higher resolution and true 4-quadrant operation at the cost of external support components.
Availability
AD7533SQ is available at Aetrix Electronics and suitable for aerospace avionics, downhole drilling instrumentation, and military communications systems requiring stable component supply across extreme temperature profiles and long production lifecycles.
Supply support for AD7533SQ 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 precision measurement, industrial automation, and defense markets since 1965.
The AD7533SQ belongs to Analog Devices' legacy precision DAC product line, engineered specifically for high-reliability, wide-temperature analog signal conditioning in mission-critical systems where long-term stability and radiation-tolerant packaging are essential.
FAQ
What is the operating temperature range of the AD7533SQ?
The AD7533SQ is rated for −55°C to +125°C operation, enabled by its hermetic 16-lead CERDIP (Q-16) package. This specification is explicitly confirmed in the Ordering Guide table for model AD7533SQ and distinguishes it from plastic-packaged variants like AD7533JP (−40°C to +85°C). The extended range makes AD7533SQ suitable for aerospace, defense, and downhole applications where thermal extremes are routine.
Is the AD7533SQ pin-compatible with the AD7520 series?
Yes, the AD7533SQ is pin and function equivalent to the AD7520 industry standard, as stated in the General Description section. Both share identical 16-pin CERDIP pinouts (IOUT1, IOUT2, GND, BIT1–BIT10, VDD, VREF, RFB), allowing direct socket replacement in legacy AD7520 designs without PCB modification - a key advantage highlighted in the datasheet's "low cost AD7520 replacement" feature.
What reference voltage polarity does the AD7533SQ support?
The AD7533SQ supports fully bidirectional reference voltage inputs: VREF may be either +10 V or −10 V, enabling true 4-quadrant multiplication. This is confirmed in the General Description ("full 4-quadrant multiplying DAC") and Functional Block Diagram, where VREF connects directly to the R-2R ladder without polarity restrictions - unlike unipolar-only DACs that require external level-shifting for negative outputs.
Does the AD7533SQ require external latching circuitry?
No, the AD7533SQ is latch-free, as explicitly stated in the FEATURES section. Its CMOS/TTL-compatible digital inputs accept parallel 10-bit data directly without external latches or Schottky diodes. This simplifies interface design with microcontrollers and FPGAs, reducing component count and propagation delay - a benefit emphasized in both the Features list and General Description.
What is the maximum recommended supply voltage for the AD7533SQ?
The absolute maximum VDD rating for the AD7533SQ is +17 V, but the datasheet specifies rated accuracy at VDD = 15 V ±10% (i.e., 13.5 V to 16.5 V). Operation outside this range - such as at 5 V - is supported for functionality with degraded performance, as noted in Table 1 under "VDD Ranges". For guaranteed 10-bit linearity and settling time, 15 V ±10% is the design target.
AD7533SQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 10
- Number of D/A Converters:
- 1
- Settling Time:
- 800ns
- Output Type:
- Current - Unbuffered
- Differential Output:
- Yes
- Data Interface:
- Parallel
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V ~ 15V
- Voltage - Supply, Digital:
- 5V ~ 15V
- INL/DNL (LSB):
- -, ±1 (Max)
- Architecture:
- R-2R
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 16-CERDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7533SQ FAQ
1.How can I place an order for AD7533SQ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7533SQ 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 AD7533SQ reliable?
The price and inventory of AD7533SQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7533SQ is usually 5 days.
3.What payment methods are accepted for AD7533SQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7533SQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7533SQ?
AD7533SQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7533SQ 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 AD7533SQ?
For technical support, including AD7533SQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7533SQ requirements.
6.How does Aetrix verify that AD7533SQ is sourced from the original manufacturer or authorized distributors?
All AD7533SQ 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 AD7533SQ meets industry standards.
7.What is the process for return or replacement of AD7533SQ?
All AD7533SQ units undergo pre-shipment inspection (PSI). If there is an issue with AD7533SQ, 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 AD7533SQ part is unused and in its original packaging.
Return procedure for AD7533SQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7533SQ Tags
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MCP47A1T-A0E/LT
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MCP4726A0T-E/MAY
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