Kirdy
Low Noise Precision Laser Diode Driver with Built-in TEC Temperature Controller
Power Input
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Input Voltage | 12 | V | |||
| Input Current | 2 | A | |||
| PoE Standard | PoE+ (802.3at) |
Note: TEC Output Current should be limited to ±2A when it is being powered via PoE(802.3af). Otherwise, Kirdy may malfunction.
Laser Diode Driver
Current Source Controller
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Resolution | 0.292 | uA | |||
| Control Range | 307.2 | mA | |||
| Current Limit | 319. | mA | |||
| Compliance voltage | > 4.928 | V | |||
| Current Noise (@ 1 kHz) | < 300 | pA / rt(Hz) | @ DC Bias: 300 mA, Load: 10 Ω Load | ||
| RMS Noise(10 Hz - 1 MHz) | < 300 | nA | @ DC Bias: 300 mA, Load: 10 Ω Load | ||
| Temperature Coefficient | ±1 | ppm/°C | @ DC Bias: 50 mA. Tested Temperature Range: 43-56 °C |
Photodiode Input
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Photocurrent Range | 0 | 3.0 | mA | ||
| Photocurrent Resolution | 0.8 | uA | |||
| Bandwidth (-3 dB) | 500 | Hz |
Note1: Circuit may be damaged if photodiode input current exceeds 3.0 mA. User can modify the circuit and reprogram the photodiode current monitor range via the given driver.
Note2: Photodiode operates in photovoaic mode.
Low Frequency Modulation Input
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Input Voltage | -1.0 | 1.0 | V | ||
| Input Impedance | 50 or 43.4k | ohm | Depends on Termination Switch Position | ||
| Bandwidth (-3 dB) | 18 | MHz | @Modulation Depth: 25 mA/V, Input : 1 Vp-p, DC Bias: 150 mA |
Note: Low Frequency Modulation Input can accept DC input to impose a DC offset to the output current.
TEC Temperature Controller
TEC Current Output
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Resolution | 22.9 | uA | |||
| Control Range (Powered via 12 V Barrel Jack) | -3.0 | 3.0 | A | With Active Cooling | |
| Control Range (Powered via PoE(802.3af)) | -2.0 | 2.0 | A | ||
| Compliance Voltage | 4.3 | V | |||
| Voltage Reading Resolution | 3.22 | mV | |||
| Current Reading Resolution | 2.0 | mA |
TEC Voltage and Current Limit
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Voltage Limit Settable Range | 0 | 4.3 | V | ||
| Voltage Limit Resolution | 3.14 | mV | |||
| Current Limit Settable Range | -3.0 | 3.0 | A | ||
| Current Limit Resolution | 1.57 | mA |
NTC Thermistor Sensor
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Resolution | 0.01 | mK | With 10 kohm NTC with 3950 B-Constant, 25°C T0 | ||
| Sampling Rate | 16.67 | > 1k | Hz |
Note: Actual Sampling Rate subjects to device operating conditions.
Digital PID Temperature Controller
| Parameter | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| Temperature Stability | < 1 | mk | Using supplied Kirdy Adapter with its copper plate installed. PID Parameters are obtained from Kirdy Autotune Algorithm. |
Note: Actual Temperature Stability subjects to the ambient environment conditions.