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Frequency To Voltage Converter
LM2907
ic amplifier
The LM2907-N and LM2917-N are frequency-to-voltage converters that convert input frequencies to voltages for use in speed sensing applications.
In stock
Specifications
8- Operating Voltage
- 28 V
- Supply Current
- 3.8 mA - 6 mA
- Interface
- GPIO, ADC
- Resolution
- 0.3%
- Range
- 1 kHz - 10 kHz
- Accuracy
- -1% to 1%
- Temperature Range
- -40°C to 85°C
- Package
- PDIP (8), PDIP (14), SOIC (8), SOIC (14)
Pinout
8Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| TACH+ | Positive tachometer input | GPIO | Input signal leading to the noninverting terminal of the internal Schmitt-Trigger comparator. |
| TACH–/GND | Negative tachometer input / Ground | GPIO | Input signal leading to the inverting terminal of the internal Schmitt-Trigger comparator; internally connected to ground on 8-pin devices. |
| V+ | Supply voltage | POWER | Supply voltage input. |
| COL | Collector of bipolar junction transistor | GPIO | Output pin for the collector of the bipolar junction transistor. |
| EMIT | Emitter of bipolar junction transistor | GPIO | Output pin for the emitter of the bipolar junction transistor. |
| CP1 | Capacitor 1 | GPIO | Pin for charging and discharging a capacitor to generate pulses at the input frequency. |
| CP2/IN+ | Capacitor 2 / Noninverting input of op amp | GPIOADC | Pin for charging and discharging a capacitor to generate pulses at the input frequency; also noninverting input of the high gain op amp. |
| IN± | Inverting input of op amp | GPIO | Inverting input to the high gain op amp. |
Interactive pinout
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LM2907
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