Features
- Clocking speeds up to 40MHz
- 4 channels
- 12ns tR/tF at 1000pF CLOAD
- 1ns rise and fall time match
- 1.5ns prop delay match
- Low quiescent current - <1mA
- Fast output enable function - 12ns
- Wide output voltage range
- 8V ≥ VL ≥ -5V
- -2V ≤ VH ≤ 16.5V
- 2A peak drive
- 3Ω on resistance
- Input level shifters
- TTL/CMOS input-compatible
- Pb-free (RoHS compliant)
Description
The EL7457 is a High-Speed, non-inverting, quad CMOS driver. It is capable of running at clock rates up to 40MHz and features 2A peak drive capability and a nominal on-resistance of just 3Ω. The EL7457 is ideal for driving highly capacitive loads, such as storage and vertical clocks in CCD applications. It is also well suited to ATE pin driving, level-shifting, and clock-driving applications. The EL7457 is capable of running from single or dual power supplies while using ground referenced inputs. Each output can be switched to either the high (VH) or low (VL) supply pins, depending on the related input pin. The inputs are compatible with both 3V and 5V CMOS and TTL logic. The output enable (OE) pin can be used to put the outputs into a high-impedance state. This is especially useful in CCD applications, where the driver should be disabled during power down. The EL7457 also features very fast rise and fall times which are matched to within 1ns. The propagation delay is also matched between rising and falling edges to within 2ns. The EL7457 is available in 16-pin QSOP, 16-pin SO (0. 150"), and 16-pin QFN packages. All are specified for operation over the full -40°C to +85°C temperature range.
Parameters
| Attributes | Value |
|---|---|
| Drivers (#) | 4 |
| Fall Time | 0.012 |
| IS (mA) | 0.8 |
| Input Signal Range | -VP to VP |
| Input Supply (Max) (VP) | 16 - 16 |
| Input Voltage (Max) (V) | 16 |
| Output Signal Range | -4.5 to 16 |
| Peak Output Current IPK (A) | 2 |
| RDS (ON) (Ohms) | 4.5 |
| Rise Time (μs) | 11 |
| Turn Off Delay (ns) | 11.5 |
| Turn On Delay (ns) | 13 |
| VBIAS (Min) (V) | 4.5 |
| Qualification Level | Standard |
Applications
- CCD drivers
- Digital cameras
- Pin drivers
- Clock/line drivers
- Ultrasound transducer drivers
- Ultrasonic and RF generators
- Level shifting
Knowledge Base
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Can you supply an example showing the power supply connections for the EL7457?
Question: I am trying to figure out how to connect the power supplies to the EL7457. I have a 5V logic signal input and want to have the output drive from +5V to –5V. The data sheet gives a table of the supply voltage relationships, but it does not actually ...
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Can I tie all four of the EL7457's outputs in parallel?
Question:I would like to apply the EL7457 driver in a configuration that parallels the four driver outputs in a given package together. I want all four outputs connected together to reduce the effective output resistance. Are there known issues with this configuration? Answer: Since the four channels are on ...
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How can I compensate for a mismatch of TD+ and TD- in the EL7457?
Question:We currently use the EL7457 device. The mismatch of the TD+ and TD- (turn-on and turn-off) of 1.5ns is a problem in our application. Do you have any hint how to compensate this? Answer:Mike Wong, formerly from Elantec/Intersil, addressed this problem in an ...
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