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Analog Devices Inc. AD790JRZ-REEL7
- Part No.:
- AD790JRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD790JRZ-REEL7.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
AD790JRZ-REEL7 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. It serves as a high-speed decision element in zero-crossing detection, overvoltage monitoring, and precision rectifier circuits.
For engineers reviewing the AD790JRZ-REEL7 datasheet, AD790JRZ-REEL7 pinout, AD790JRZ-REEL7 application, or AD790JRZ-REEL7 equivalent, key selection criteria include propagation delay vs. overdrive, input hysteresis (0.3–0.65 mV), latch timing (tS = 5–10 ns, tH = 25–35 ns), and SOIC_N package compatibility with surface-mount production.
Technical Context
The AD790JRZ-REEL7 implements a complementary bipolar (CB) process architecture enabling simultaneous 45 ns response and 1 mV typical 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 independent analog (+VS/–VS) and logic (VLOGIC) supply domains, supporting flexible configurations including single 5 V (VLOGIC = +VS = 5 V), dual ±15 V, or asymmetric supplies like +5 V/–12 V. Built-in hysteresis (0.3–0.65 mV) and ground-referenced inputs in single-supply mode enable robust operation with slow low-level (10 mV) or fast large-amplitude (10 V) signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 45 ns max (100 mV step, 5 mV overdrive); enables sub-22 MHz signal edge detection in timing-critical systems. |
| Input Offset Voltage | 1.0 mV max (AD790J grade); ensures accurate threshold comparison for signals down to ~10 mV without external trimming. |
| Input Hysteresis | 0.65 mV max (TMIN to TMAX); suppresses chatter on slowly varying inputs such as power rail monitors or sensor outputs. |
| Supply Range | +VS = 4.5–7 V (single), ±15 V (dual); supports direct interface to 5 V logic rails and industrial ±12 V/±15 V analog subsystems. |
| Output Compatibility | CMOS/TTL logic levels (VOH ≥ 4.3 V, VOL ≤ 0.5 V @ 6.4 mA); drives standard LSTTL and HCMOS loads without level-shifting. |
| Latch Timing | tS = 10 ns max, tH = 35 ns max; allows synchronous sampling of transient events with minimal setup/hold overhead. |
| Power Dissipation | 60 mW (single supply), 242 mW (dual ±15 V); enables use in thermally constrained PCB layouts without forced cooling. |
Pinout & Package
AD790JRZ-REEL7 is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch, 5.00 mm × 4.00 mm body, and gull-wing leads. Pin 1 is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTPUT) | Digital output | CMOS/TTL-compatible push-pull output; swings rail-to-rail between VLOGIC and GND; sinks/sourced up to 6.4 mA. |
| 2 (LATCH) | Asynchronous latch control | Active-low; holds output state when low; requires VIH ≥ 1.6 V, VIL ≤ 0.8 V; series 510 Ω resistor recommended for dual-supply power-up. |
| 3 (GROUND) | Analog and digital reference | Common return path for –VS, VLOGIC, and internal circuitry; must be connected to low-impedance system ground plane. |
| 4 (VLOGIC) | Logic supply | Powers output stage only; decoupled with 0.1 µF ceramic capacitor; range 4.0–7 V; independent of analog supply pins. |
| 5 (+VS) | Positive analog supply | Supplies front-end amplifier and bias networks; supports 4.5–33 V (dual) or 4.5–7 V (single); must be ≥ VLOGIC – 0.5 V. |
| 6 (+IN) | Non-inverting input | High-impedance (202 MΩ||pF) differential input; common-mode range extends to –VS in dual supply or 0 V in single supply. |
| 7 (–IN) | Inverting input | Matched to +IN; supports ±15 V differential input (max 15 V); usable with bipolar signals down to –0.4 V (Schottky-clamped). |
| 8 (–VS) | Negative analog supply | Required only in dual-supply mode; sets lower bound of common-mode input range; must be ≤ 0 V; not connected in single-supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-glitch output stage | Controlled transistor switching eliminates current spikes that cause supply rail noise and input oscillation. |
| Ground-referenced inputs (single supply) | Enables direct connection of one input to system ground-unavailable in most comparators-simplifying zero-crossing detector design. |
| Built-in hysteresis | Factory-trimmed 0.3–0.65 mV hysteresis eliminates need for external positive feedback resistors in noise-prone environments. |
| Independent VLOGIC supply | Allows output logic level to remain fixed at 5 V while analog front-end operates from ±15 V, easing mixed-voltage system integration. |
| Wide differential input range | ±15 V max differential voltage permits direct monitoring of high-swing signals (e.g., motor phase voltages) without attenuators or clamps. |
Applications
| Zero-Crossing Detection | Overvoltage Protection |
|---|---|
Use Scenario: Detecting AC line zero crossings in TRIAC-based lighting controls or motor phase commutation. IC Role / Device Role / Timing Role: Fast comparator with ground-referenced inputs identifies polarity reversal within 45 ns, enabling precise firing-angle control. Use Value: Eliminates external level-shifting components; 1 mV offset ensures <100 µs timing error at 50 Hz with no calibration. | Use Scenario: Monitoring DC bus voltage in industrial power supplies to trigger shutdown before capacitor overvoltage failure. IC Role / Device Role / Timing Role: High-speed window comparator using dual AD790JRZ-REEL7 units detects excursions beyond ±7.5 V thresholds. Use Value: 15 V differential input range accepts direct connection to 12 V bus; built-in hysteresis prevents nuisance tripping near trip point. |
| Precision Full-Wave Rectification | Bipolar Signal Level Translation |
Use Scenario: Converting low-amplitude AC sensor outputs (e.g., thermocouple, strain gauge) into unipolar DC for ADC input. IC Role / Device Role / Timing Role: Comparator driving FET switches in active rectifier topology; latched output synchronizes gain inversion. Use Value: 45 ns delay enables clean rectification up to 1 MHz; 10 mV input resolution preserves microvolt-level signal fidelity. | Use Scenario: Converting ±5 V RS-422 or legacy instrumentation signals to 0–5 V logic levels for FPGA/CPU interfacing. IC Role / Device Role / Timing Role: Single-supply line receiver using Schottky-clamped input to accept –0.4 V below ground while powered from +5 V only. Use Value: Removes need for dual ±5 V supplies; 20 MHz switching capability supports high-speed serial data recovery. |
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 onboard latch, open-collector output requiring pull-up. | Lower cost but requires external hysteresis and level-shifting for TTL/CMOS interfacing. | Choose LM311DR only when speed <100 ns is acceptable and board space allows discrete support components. |
| TLV3501CDR | Faster (4.5 ns), rail-to-rail input, no latch, 2.7–5.5 V supply only. | Optimized for low-voltage portable systems; lacks ±15 V dual-supply capability and built-in hysteresis. | Choose TLV3501CDR for battery-powered designs needing ultra-fast response but unable to use dual supplies. |
Compared with LM311DR and TLV3501CDR, AD790JRZ-REEL7 uniquely balances 45 ns speed, dual/single supply flexibility, integrated latch, and factory-trimmed hysteresis-making it optimal for industrial signal conditioning where reliability, layout simplicity, and mixed-voltage interoperability are critical.
Availability
AD790JRZ-REEL7 is available at Aetrix Electronics and suitable for zero-crossing detectors, overvoltage protection circuits, and precision rectifiers requiring stable component supply across automotive, industrial automation, and test equipment programs.
Supply support for AD790JRZ-REEL7 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 instrumentation, industrial, communications, and aerospace markets since 1965.
The AD790JRZ-REEL7 belongs to Analog Devices' precision high-speed comparator product line, engineered for applications demanding sub-50 ns response, low input offset, and robust operation in noisy industrial environments.
FAQ
What supply configurations does the AD790JRZ-REEL7 support?
The AD790JRZ-REEL7 supports single 5 V (VLOGIC = +VS = 5 V), dual ±15 V, and asymmetric supplies such as +5 V/–12 V. The +VS pin must be ≥ VLOGIC – 0.5 V; –VS is left unconnected in single-supply mode. Absolute maximum ratings allow ±18 V supplies, but operation is specified up to ±15 V.
Does the AD790JRZ-REEL7 require external hysteresis resistors?
No. The AD790JRZ-REEL7 includes factory-trimmed internal hysteresis of 0.3–0.65 mV, eliminating the need for external positive feedback resistors. This simplifies PCB layout and improves consistency across temperature and unit-to-unit variation compared to discrete hysteresis networks.
How is the latch function used in the AD790JRZ-REEL7?
The latch function is controlled by Pin 2 (LATCH). Driving it low freezes the output state regardless of input changes; driving it high restores real-time comparison. Setup time is 10 ns max, hold time 35 ns max. For reliable capture, apply the latch signal after propagation delay (45 ns) has elapsed from input transition.
What is the input common-mode voltage range for AD790JRZ-REEL7 in single-supply mode?
In single-supply mode (+VS = VLOGIC = 5 V), the AD790JRZ-REEL7 supports a common-mode input range from 0 V to +VS – 2 V (i.e., 0 V to 3 V). Its unique ground-referenced input capability allows one input to be tied directly to system ground-a feature absent in most comparators.
Can the AD790JRZ-REEL7 drive TTL and CMOS loads directly?
Yes. The AD790JRZ-REEL7 provides CMOS/TTL-compatible output levels: VOH ≥ 4.3 V and VOL ≤ 0.5 V at 6.4 mA sink/source. Its symmetric output stage delivers matched rise/fall times and supports fanout of multiple LSTTL or HCMOS gates without external buffers.
AD790JRZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD790JRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD790JRZ-REEL7 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-REEL7 reliable?
The price and inventory of AD790JRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD790JRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD790JRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD790JRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD790JRZ-REEL7?
AD790JRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD790JRZ-REEL7 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-REEL7?
For technical support, including AD790JRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD790JRZ-REEL7 requirements.
6.How does Aetrix verify that AD790JRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD790JRZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of AD790JRZ-REEL7?
All AD790JRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD790JRZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for AD790JRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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