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Analog Devices Inc. AD790JNZ
- Part No.:
- AD790JNZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD790JNZ.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:314
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Product details
Overview
AD790JNZ from Analog Devices is a fast, precision voltage comparator with 45 ns max propagation delay, ±15 V or single 5 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 AD790JNZ datasheet, AD790JNZ pinout, AD790JNZ application, or AD790JNZ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-chain support for industrial and data acquisition systems.
Technical Context
The AD790JNZ implements a complementary bipolar (CB) process architecture enabling simultaneous 45 ns response and 1 mV max input 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 built-in hysteresis (0.3–0.65 mV typ) and dual-supply flexibility: +VS ≥ VLOGIC – 0.5 V and –VS ≤ 0 V in dual mode; 4.5–7 V in single-supply mode with ground-referenced inputs - enabling direct interfacing to slow mV-level or fast 10 V signals without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 45 ns max (100 mV step, 5 mV overdrive) - enables clean signal edge detection up to ~10 MHz in timing-critical circuits. |
| Input Offset Voltage | 1.0 mV max (TMIN to TMAX) - supports accurate threshold detection for sub-mV signal monitoring. |
| Hysteresis Voltage | 0.65 mV max (TMIN to TMAX) - prevents chatter on slowly varying inputs near trip point. |
| Supply Range | Single 4.5–7 V or dual ±15 V - allows flexible integration into 5 V logic systems or high-dynamic-range analog front-ends. |
| Output Compatibility | CMOS/TTL logic levels (VOH ≥ 4.3 V, VOL ≤ 0.5 V @ 6.4 mA) - directly drives standard digital loads without level-shifting. |
| Power Dissipation | 60 mW (single supply), 242 mW (dual supply) - enables use in thermally constrained PCB layouts with minimal heatsinking. |
| Latch Function | Validated setup/hold times (tS = 10 ns, tH = 35 ns) - supports synchronous sampling in digitization and control loops. |
Pinout & Package
AD790JNZ is housed in an 8-lead plastic dual in-line package (PDIP, N-8), compliant with JEDEC MS-001, with 0.300-inch body width and 0.100-inch lead pitch. Pin 1 is top-left corner when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT | CMOS/TTL-compatible open-collector–like output; swings symmetrically between VLOGIC and GND. |
| 2 | LATCH | Active-low asynchronous latch enable; holds output state when pulled low per timing specs (tS/tH). |
| 3 | GROUND | Analog and digital ground reference; must share common return path with supply grounds for stability. |
| 4 | VLOGIC | Dedicated 4.5–7 V logic supply pin; defines output high/low voltage levels independently of analog supplies. |
| 5 | +VS | Positive analog supply input; supports +5 V to +15 V (single or dual mode); must be ≥ VLOGIC – 0.5 V. |
| 6 | +IN | Non-inverting input; high-impedance (202 MΩ||pF), common-mode range 0 to +VS–2 V (single supply). |
| 7 | –IN | Inverting input; identical impedance and common-mode range as +IN; differential input voltage limited to ±15 V. |
| 8 | –VS | Negative analog supply input; tied to GND in single-supply mode; supports –15 V in dual mode. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-referenced inputs in single-supply mode | Enables direct sensing of 0 V–referenced signals (e.g., current-sense traces) without level-shifting circuitry. |
| Onboard latch with validated timing | Eliminates need for external D-latch; supports synchronized capture in ADC interfaces and pulse-width modulators. |
| Low-glitch output stage | Reduces supply rail disturbance by >90% vs. standard TTL outputs - critical for noise-sensitive mixed-signal PCBs. |
| Wide differential input range (±15 V) | Accepts large-amplitude signals (e.g., ±10 V sensor outputs) without external attenuation or clamping diodes. |
| Internal hysteresis (0.3–0.65 mV) | Prevents false triggering on noisy or slowly ramping inputs - no external resistor network required. |
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: Fast comparator with ground-referenced inputs compares sine wave against 0 V reference. Use Value: 45 ns propagation delay ensures <1° phase error at 50 Hz; built-in hysteresis rejects line noise without external components. | Use Scenario: Protecting downstream circuitry from transient overvoltage events in industrial power supplies. IC Role / Device Role / Timing Role: High-speed window comparator detecting excursions beyond ±7.5 V thresholds. Use Value: ±15 V differential input range accepts direct connection to unattenuated signals; latch holds fault flag until reset. |
| Precision Full-Wave Rectification | Single-Supply Bipolar Signal Reception |
Use Scenario: Converting low-amplitude AC signals (mV to 10 V) to DC in instrumentation front-ends. IC Role / Device Role / Timing Role: High-speed comparator controlling FET switches in active rectifier topology. Use Value: 1 mV max offset and 45 ns delay enable clean rectification of 1 MHz signals with <0.1% distortion. | Use Scenario: Converting ±5 V RS-422 or legacy bus signals to 5 V CMOS logic in embedded controllers. IC Role / Device Role / Timing Role: Single-supply comparator with sub-ground input tolerance acting as bipolar line receiver. Use Value: Input common-mode extends 0.4 V below GND; output swing matches TTL/CMOS thresholds - no dual supply needed. |
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, no VLOGIC pin - requires external pull-up and hysteresis resistors. | Suitable for cost-sensitive, non-timing-critical comparators; not recommended for synchronous sampling or low-noise rectifiers. | Select LM311DR only if propagation delay >100 ns is acceptable and board space permits external components. |
| MAX903ESA+ | Faster (20 ns), rail-to-rail input, but no latch and narrower supply range (2.7–5.5 V); CMOS-only output. | Better for battery-powered, low-voltage systems; lacks dual-supply flexibility and latch for industrial control. | Choose MAX903ESA+ only for 3.3 V systems requiring ultra-fast response without latch or ±15 V operation. |
Compared with LM311DR and MAX903ESA+, the AD790JNZ uniquely combines 45 ns speed, ±15 V capability, ground-referenced single-supply operation, and integrated latch - making it the only option among the three for precision, synchronous, wide-dynamic-range comparator applications.
Availability
AD790JNZ is available at Aetrix Electronics and suitable for zero-crossing detection, overvoltage protection, and precision rectification requiring stable component supply across industrial, test equipment, and data acquisition programs.
Supply support for AD790JNZ 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 AD790 belongs to Analog Devices' precision comparator product line, engineered for high-speed, low-offset signal conditioning in data acquisition, industrial automation, and instrumentation systems where timing integrity and noise immunity are critical.
FAQ
What is the maximum differential input voltage rating for the AD790JNZ?
The AD790JNZ has an absolute maximum differential input voltage rating of ±16.5 V, with a recommended operating limit of ±15 V. This allows direct connection to high-amplitude signals such as ±10 V sensor outputs or transformer-coupled AC waveforms without external attenuation or clamping diodes - a key advantage over comparators with narrower input ranges.
Does the AD790JNZ require external hysteresis resistors?
No, the AD790JNZ includes internal hysteresis (0.3–0.65 mV typical) generated via on-chip feedback. This eliminates the need for external resistor networks in most noise-prone applications like zero-crossing detection or overvoltage monitoring - reducing component count and layout complexity while ensuring consistent hysteresis behavior across temperature and supply variations.
Can the AD790JNZ operate from a single 3.3 V supply?
No, the AD790JNZ requires a minimum single-supply voltage of 4.5 V and a maximum of 7 V. Its VLOGIC pin must be supplied within that range to ensure proper output logic levels and latch functionality. For 3.3 V systems, consider alternatives like the MAX903ESA+, but note that those lack the AD790JNZ's dual-supply capability and onboard latch.
What is the purpose of the separate VLOGIC pin on the AD790JNZ?
The VLOGIC pin on the AD790JNZ sets the output logic high/low voltage levels independently of the analog supply rails. When VLOGIC = 5 V, the output swings between ≈4.3 V (VOH) and ≈0.5 V (VOL), ensuring compatibility with TTL and CMOS loads regardless of whether +VS is 5 V, +15 V, or –15 V - enabling robust interfacing in mixed-voltage systems.
How does the latch function of the AD790JNZ work in practice?
The AD790JNZ latch is enabled by pulling Pin 2 (LATCH) low. Once latched, the output holds its last state regardless of input changes until LATCH returns high. Valid operation requires meeting setup (5–10 ns) and hold (25–35 ns) timing relative to input transitions - making it suitable for synchronizing comparator decisions with system clocks in ADC interfaces or PWM generators.
AD790JNZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- 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:
- Through Hole
- :
- 8-PDIP
AD790JNZ FAQ
1.How can I place an order for AD790JNZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD790JNZ 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 AD790JNZ reliable?
The price and inventory of AD790JNZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD790JNZ is usually 5 days.
3.What payment methods are accepted for AD790JNZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD790JNZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD790JNZ?
AD790JNZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD790JNZ 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 AD790JNZ?
For technical support, including AD790JNZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD790JNZ requirements.
6.How does Aetrix verify that AD790JNZ is sourced from the original manufacturer or authorized distributors?
All AD790JNZ 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 AD790JNZ meets industry standards.
7.What is the process for return or replacement of AD790JNZ?
All AD790JNZ units undergo pre-shipment inspection (PSI). If there is an issue with AD790JNZ, 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 AD790JNZ part is unused and in its original packaging.
Return procedure for AD790JNZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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