Overview
The LMH7324SQX/NOPB, produced by Texas Instruments, is a quad high-speed comparator with RS(P)ECL (Reduced Swing Positive Emitter Coupled Logic) outputs. This device is designed for high-speed applications, offering a propagation delay of 700 ps and low dispersion of 20 ps. It operates over a wide supply voltage range from 5V to 12V, making it versatile for various high-speed logic families. The LMH7324 is available in a 32-Pin WQFN package, which is ideal for space-constrained designs. Although the LMH7324SQX/NOPB is currently obsolete and no longer manufactured, its specifications and features remain relevant for understanding high-speed comparator technology.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Propagation Delay | Overdrive = 20 mV, CL = 2 pF | 737 | 700 | - | ps |
| Overdrive Dispersion | - | - | 20 | - | ps |
| Rise and Fall Times | Overdrive = 50 mV, CL = 2 pF | - | 150 | - | ps |
| Supply Voltage Range | - | 5 | - | 12 | V |
| Input Common Mode Range | - | -200 mV below VEE | - | - | mV |
| Maximum Toggle Rate | Overdrive = ±50 mV, CL = 2 pF | - | 3.84 Gb/s | - | Gb/s |
| Output Voltage High | VIN Differential = 25 mV | 3.8 | 3.87 | 3.95 | V |
| Output Voltage Low | VIN Differential = 25 mV | 3.45 | 3.52 | 3.60 | V |
| Supply Current per Channel | VCCI = VCCO = 5V, VIN Differential = 25 mV | 5.6 | 7.5 | 8 | mA |
Key Features
- Quad high-speed comparator with RS(P)ECL outputs compatible with LVDS if VCCO is set to 2.5V.
- Propagation delay of 700 ps and low dispersion of 20 ps.
- Fast rise and fall times of approximately 150 ps.
- Wide supply voltage range from 5V to 12V.
- Input common mode range extends 200 mV below the negative supply voltage, enabling ground sensing with a single supply.
- High level of suppression for common mode noise due to complementary outputs.
- Maximum toggle rate of up to 3.84 Gb/s.
- Available in a 32-Pin WQFN package, ideal for space-constrained designs.
- Operates over the industrial temperature range of −40°C to 125°C.
Applications
- Digital receivers.
- High-speed signal restoration.
- Zero-crossing detectors.
- High-speed sampling.
- Window comparators.
- High-speed signal triggering.
Q & A
- What is the propagation delay of the LMH7324?
The propagation delay of the LMH7324 is approximately 700 ps.
- What is the overdrive dispersion of the LMH7324?
The overdrive dispersion of the LMH7324 is 20 ps.
- What is the rise and fall time of the LMH7324?
The rise and fall times of the LMH7324 are approximately 150 ps.
- What is the supply voltage range of the LMH7324?
The LMH7324 operates over a supply voltage range from 5V to 12V.
- What is the input common mode range of the LMH7324?
The input common mode range extends 200 mV below the negative supply voltage.
- What are the output types of the LMH7324?
The LMH7324 has RS(P)ECL outputs and can be configured to create LVDS levels if VCCO is set to 2.5V.
- What is the maximum toggle rate of the LMH7324?
The maximum toggle rate of the LMH7324 is up to 3.84 Gb/s.
- In what package is the LMH7324 available?
The LMH7324 is available in a 32-Pin WQFN package.
- What is the operating temperature range of the LMH7324?
The LMH7324 operates over the industrial temperature range of −40°C to 125°C.
- Is the LMH7324SQX/NOPB still in production?
No, the LMH7324SQX/NOPB is obsolete and no longer manufactured.
