This comparator is a precision rail-to-rail comparator with hysteresis and offset correction. It was taped out on the CI2404 Chipalooza tapeout. The specifications below are target specifications. Check back for characterized numbers once the silicon is characterized.
| Pin Name | Use | Power Domain | Notes |
|---|---|---|---|
| avdd | analog power | 3.3-5.5V | |
| dvdd | digital power | 1.8V | |
| avss | analog ground | ||
| dvss | digital ground | ||
| ena | enable | dvdd domain | |
| vinn | negative side input | avdd domain | |
| vinp | positive side input | avdd domain | |
| ibias | bandgap-controlled current bias | ||
| vout | output | dvdd domain | CMOS digital |
| vhyst[1:0] | hysteresis select |
| Parameter | Min | Typical | Max | Unit | Notes |
|---|---|---|---|---|---|
| Operating Voltage | 2.95 | 3.3 | 5.5 | V | |
| Operating Temperature | -40 | 25 | 85 | °C | |
| Power Consumption (enabled) | 15 | 20 | µA | Measured at 1.8V and 25°C | |
| Power Consumption (disabled) | 5 | 10 | nA | Measured at 1.8V and 25°C | |
| Input Offset Voltage | 0.5 | 1 | mV | All corners voltage and temperature | |
| Propagation Delay | 0.5 | 1 | µs | With 200mV overdrive | |
| Input Common-Mode Range | 0 | 50 | 100 | % | Percent of VDD |
| Output Current Drive | N/A | mA | (Use standard cell buffer at output) | ||
| Output Voltage Swing | 0 | 1.8 | V | Rail-to-rail output | |
| Input Capacitance | 0.5 | 1 | 2 | pF | |
| Hysteresis (off) | 1 | 2 | 5 | mV | |
| Hysteresis (low) | 5 | 10 | 20 | mV | |
| Hysteresis (high) | 25 | 50 | 100 | mV | |
| Frequency Bandwidth | 5 | 10 | 20 | kHz | |
| PSRR (Power Supply Rejection) | 30 | 40 | dB | (negotiable) | |
| CMRR (Common-Mode Rejection) | 30 | 40 | dB | (negotiable) | |
| Output load | 1 | 2 | pF | (condition) | |
| Hysteresis selection (bits) | 2 | Off/high/low |
EF_COMPARATOR
Vendor
Efabless
130nm
Skywater
Comparator
Open Source (Free)
EF Certified
Integrated