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Analog Devices Inc. AD790JRZ-REEL
- Part No.:
- AD790JRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD790JRZ-REEL.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:713
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Product details
Overview
AD790JRZ-REEL from Analog Devices is a fast, precision voltage comparator with 45 ns max propagation delay, single 5 V or dual ±15 V supply operation, CMOS/TTL-compatible output, onboard latch, and 250 µV max input offset voltage - used in zero-crossing detectors, overvoltage monitors, and precision rectifiers.
For engineers reviewing the AD790JRZ-REEL datasheet, AD790JRZ-REEL pinout, AD790JRZ-REEL application, or AD790JRZ-REEL equivalent, this page delivers verified technical context, SOIC-8 package mapping, latch timing specs, hysteresis behavior, and real-world design meaning for signal conditioning and threshold detection circuits.
Technical Context
The AD790JRZ-REEL implements a complementary bipolar (CB) process architecture enabling simultaneous 45 ns response time and 1 mV typical input voltage resolution. Its low-glitch output stage uses controlled switching between PNP pull-up and NPN pull-down transistors to minimize supply rail disturbance and prevent input feedback oscillation.
It features separate analog (+VS/–VS) and logic (VLOGIC) supply domains, supporting single-supply ground-referenced inputs or dual-supply ±15 V differential operation up to 15 V. Internal hysteresis (0.3–0.65 mV typ) and latch functionality (tS = 5–10 ns, tH = 25–35 ns) enable robust synchronous decision capture in noisy or slow-slew environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 45 ns max (100 mV step, 5 mV overdrive); enables clean edge detection in >10 MHz clocked systems. |
| Input Offset Voltage | 1.0 mV max (J-grade); ensures accurate threshold setting for sub-10 mV signal monitoring. |
| Hysteresis Voltage | 0.4 mV typ (dual supply); suppresses chatter on slowly crossing inputs without external components. |
| Supply Range | Single 4.5–7 V or dual ±15 V; supports direct interface to 5 V logic rails and industrial ±12 V analog stages. |
| Output Compatibility | CMOS/TTL logic levels (VOH ≥ 4.3 V, VOL ≤ 0.5 V @ 6.4 mA); drives LSTTL and HCMOS loads without level shifters. |
| Power Dissipation | 60 mW max (single supply); lowest in class for comparators with <50 ns speed, reducing thermal load in dense layouts. |
| Latch Timing | tS = 10 ns max, tH = 35 ns max; allows reliable sampling of transient events with minimal setup/hold overhead. |
Pinout & Package
AD790JRZ-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, 5.00 mm × 4.00 mm body, 1.27 mm lead pitch, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTPUT) | Digital output driver | CMOS/TTL-compatible push-pull output; swings rail-to-rail between VLOGIC and GND. |
| 2 (LATCH) | Asynchronous latch control | Active-low hold signal; latches output state when pulled ≤0.8 V; requires CMOS/TTL drive. |
| 3 (GROUND) | Analog and digital reference | Common return for –VS, VLOGIC, and output stage; must be low-impedance star point. |
| 4 (VLOGIC) | Logic supply rail | Defines output high/low thresholds; typically +5 V; independent of analog supplies. |
| 5 (+VS) | Positive analog supply | Accepts +5 V (single) or +15 V (dual); must be ≥ (VLOGIC – 0.5 V) in all operating conditions. |
| 6 (+IN) | Non-inverting input | High-impedance (202 MΩ), wide common-mode range (0 to +VS–2 V in single supply). |
| 7 (–IN) | Inverting input | Matches +IN; differential input voltage rated to ±15 V (dual) or +VS (single). |
| 8 (–VS) | Negative analog supply | Ground in single supply; –15 V in dual; must not exceed GND potential in single-mode operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-glitch output stage | Eliminates current spikes during switching, preventing supply-induced oscillation and improving noise immunity. |
| Separate VLOGIC supply | Decouples output logic levels from analog supply rails, enabling stable TTL/CMOS interfacing across varying analog voltages. |
| Onboard hysteresis | 0.3–0.65 mV internal hysteresis reduces need for external positive feedback networks in noisy environments. |
| Ground-referenced inputs (single supply) | Allows direct connection of +IN/–IN to 0 V reference - unique among comparators of comparable speed and precision. |
| Latch function with defined timing | Enables synchronous sampling of comparator decisions with guaranteed 5 ns setup and 25 ns hold windows. |
Applications
| Zero-Crossing Detection | Overvoltage Monitoring |
|---|---|
Use Scenario: Detecting AC waveform polarity transitions in motor control or power metering systems. IC Role / Device Role / Timing Role: Precision comparator with 1 mV offset and 45 ns delay captures zero crossings with minimal phase error. Use Value: Enables accurate timing of TRIAC firing or PWM synchronization without external hysteresis or calibration. | Use Scenario: Protecting downstream circuitry from supply rail overvoltage in industrial PLC I/O modules. IC Role / Device Role / Timing Role: High-speed threshold detector comparing sensed rail voltage against a stable reference. Use Value: Responds within 45 ns to 100 mV overvoltage steps, triggering shutdown before damage occurs. |
| Precision Full-Wave Rectification | Bipolar Signal Level Translation |
Use Scenario: Converting low-amplitude AC sensor outputs (e.g., thermocouple, strain gauge) into DC for ADC input. IC Role / Device Role / Timing Role: Fast comparator controlling FET switches in active rectifier topology. Use Value: Supports clean rectification of signals as small as 5 mV due to low offset and built-in hysteresis. | Use Scenario: Converting ±5 V RS-422 or legacy bus signals to 0–5 V logic for microcontroller input. IC Role / Device Role / Timing Role: Single-supply line receiver using clamped input to handle negative excursions below ground. Use Value: Operates up to 20 MHz without external biasing, eliminating dual-supply requirement for bipolar interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | Slower (200 ns propagation delay), no internal latch, higher offset (7 mV max), open-collector output requiring pull-up. | Suitable for cost-sensitive, non-critical timing applications where latch or speed is unnecessary. | Select LM311DR only if 45 ns speed, latch, or rail-to-rail output are not required. |
| MAX9032ASA+ | Faster (20 ns), no latch, rail-to-rail input/output, but lower input voltage range (±3.5 V max differential) and no dual-supply support. | Better for low-voltage, high-speed portable designs; unsuitable for ±15 V industrial signal chains. | Choose MAX9032ASA+ only for battery-powered systems needing sub-25 ns response and 2.7–5.5 V operation. |
Compared with LM311DR and MAX9032ASA+, the AD790JRZ-REEL uniquely balances nanosecond-speed response, latch capability, ±15 V tolerance, and single-supply ground-referencing - making it optimal for industrial signal conditioning where timing integrity, noise immunity, and supply flexibility are jointly critical.
Availability
AD790JRZ-REEL is available at Aetrix Electronics and suitable for zero-crossing detection, overvoltage protection, precision rectification, bipolar signal translation, and synchronous sampling applications requiring stable component supply and long-term industrial availability.
Supply support for AD790JRZ-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 since 1965.
The AD790JRZ-REEL belongs to Analog Devices' precision comparator product line, engineered for applications demanding speed, accuracy, and robustness in harsh electrical environments - especially where ground-referenced sensing, latch synchronization, or wide supply flexibility are essential.
FAQ
What supply configurations does the AD790JRZ-REEL support?
The AD790JRZ-REEL operates from single 4.5–7 V (e.g., +VS = VLOGIC = 5 V, –VS = 0 V) or dual supplies (e.g., +VS = +15 V, –VS = –15 V, VLOGIC = 5 V). In dual mode, +VS must be ≥ (VLOGIC – 0.5 V), and –VS must not exceed ground in single-supply use. The AD790JRZ-REEL's separate VLOGIC pin ensures consistent logic-level output regardless of analog rail variation.
Does the AD790JRZ-REEL require external hysteresis for noise immunity?
No - the AD790JRZ-REEL integrates 0.3–0.65 mV typical hysteresis, sufficient to suppress chatter on slowly varying or noisy inputs like AC zero-crossings or sensor outputs. External hysteresis is only needed for wider thresholds (>1 mV), which the AD790JRZ-REEL's internal feedback cannot provide.
How does the latch function work on the AD790JRZ-REEL?
The AD790JRZ-REEL's Pin 2 (LATCH) is active-low: pulling it ≤0.8 V holds the current output state regardless of input changes. To capture a decision, apply the latch signal after the 45 ns propagation delay and respect tS = 5–10 ns setup and tH = 25–35 ns hold times relative to the input transition. When unused, tie Pin 2 to VLOGIC.
Can the AD790JRZ-REEL interface directly to 3.3 V logic?
No - the AD790JRZ-REEL's VLOGIC pin requires 4.0–7 V (min 4.0 V in spec), and its output swing is referenced to VLOGIC and GND. Driving 3.3 V logic directly risks overvoltage. Use a level translator or set VLOGIC = 3.3 V only if confirmed by updated Analog Devices characterization - the published AD790JRZ-REEL spec assumes 5 V VLOGIC.
What is the maximum differential input voltage rating for the AD790JRZ-REEL?
The AD790JRZ-REEL is rated for ±15 V differential input voltage under dual-supply operation (±15 V), and up to +VS in single-supply mode. Absolute maximum rating is ±16.5 V. Exceeding these may cause permanent damage. Input common-mode range extends to –VS (or 0 V in single supply) and +VS–2 V, enabling direct connection to high-amplitude signals without external clamping diodes.
AD790JRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 7V, ±2.25V ~ 16.5V
- :
- 1.5mV @ 5V
- Voltage - Input Offset (Max):
- 5µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 10mA
- Current - Quiescent (Max):
- 95dB CMRR, 90dB PSRR
- CMRR, PSRR (Typ):
- 50ns
- Propagation Delay (Max):
- 500µV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
AD790JRZ-REEL FAQ
1.How can I place an order for AD790JRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD790JRZ-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 AD790JRZ-REEL reliable?
The price and inventory of AD790JRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD790JRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD790JRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD790JRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD790JRZ-REEL?
AD790JRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD790JRZ-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 AD790JRZ-REEL?
For technical support, including AD790JRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD790JRZ-REEL requirements.
6.How does Aetrix verify that AD790JRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD790JRZ-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 AD790JRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD790JRZ-REEL?
All AD790JRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD790JRZ-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 AD790JRZ-REEL part is unused and in its original packaging.
Return procedure for AD790JRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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