Datasheet LTC1923 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Efficiency Thermoelectric Cooler Controller |
| Pages / Page | 28 / 4 — ELECTRICAL CHARACTERISTICS The |
| File Format / Size | PDF / 458 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The
Model Line for this Datasheet
Text Version of Document
LTC1923
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VDD = 5V, RSLEW = VDD, SDSYNC = VDD, RT = 10k, CT = 330pF unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS TEC Voltage Amplifier
ATEC Amplifier Gain 0.98 1 1.02 V/V TECOFF Amplifier Offset Measured at VTEC, VCM = 2.5V – 7 mV TECCMR Common Mode Rejection 0.1V < VCM < 4.9V 60 dB VTECH Output High Voltage ILOAD = –50µA 4.7 4.9 V VTECL Output Low Voltage ILOAD = 50µA 0.1 0.3 V f3dB –3dB Frequency (Note 3) 1 MHz
Output Drivers
OUTH Output High Voltage IOUT = – 100mA 4 4.5 V OUTL Output Low Voltage IOUT = 100mA 0.7 1.2 V tRISE Output Rise Time CLOAD = 1nF 20 ns tFALL Output Fall Time CLOAD = 1nF 20 ns trSLEW Output Rise Time CLOAD = 1nF, RSLEW = 10k 20 ns tfSLEW Output Fall Time CLOAD = 1nF, RSLEW = 10k 20 ns trSLEW Output Rise Time CLOAD = 1nF, RSLEW = 100k 90 ns tfSLEW Output Slew Fall Time CLOAD = 1nF, RSLEW = 100k 90 ns SLEWVT RSLEW Disable Threshold 2.75 V DLY Output Dead Time RT = 10k 90 ns
Fault
OPENTH Open Thermistor Threshold VSET = 5V, Measured with Respect to VSET – 410 mV SHRTTH Shorted Thermistor Threshold VSET = 5V, Measured with Respect to GND 0.975 V FLTV Fault Output Low Voltage 1mA Into FAULT, During Fault 150 300 mV
Direction Comparator
DIRH Low-to-High Threshold TEC – = 2.5V, Measured with Respect to TEC – 50 mV Sensed When H/C Toggles Low DIRL High-to-Low Threshold TEC – = 2.5V, Measured with Respect to TEC – – 50 mV Sensed When H/C Toggles High HCV H/C Output Low Voltage 1mA Into Pin 150 300 mV
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Guaranteed by design, not tested in production. of a device may be impaired.
Note 2:
The LTC1923E is guaranteed to meet specifications from 0°C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. 1923f 4
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VDD = 5V, RSLEW = VDD, SDSYNC = VDD, RT = 10k, CT = 330pF unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS TEC Voltage Amplifier
ATEC Amplifier Gain 0.98 1 1.02 V/V TECOFF Amplifier Offset Measured at VTEC, VCM = 2.5V – 7 mV TECCMR Common Mode Rejection 0.1V < VCM < 4.9V 60 dB VTECH Output High Voltage ILOAD = –50µA 4.7 4.9 V VTECL Output Low Voltage ILOAD = 50µA 0.1 0.3 V f3dB –3dB Frequency (Note 3) 1 MHz
Output Drivers
OUTH Output High Voltage IOUT = – 100mA 4 4.5 V OUTL Output Low Voltage IOUT = 100mA 0.7 1.2 V tRISE Output Rise Time CLOAD = 1nF 20 ns tFALL Output Fall Time CLOAD = 1nF 20 ns trSLEW Output Rise Time CLOAD = 1nF, RSLEW = 10k 20 ns tfSLEW Output Fall Time CLOAD = 1nF, RSLEW = 10k 20 ns trSLEW Output Rise Time CLOAD = 1nF, RSLEW = 100k 90 ns tfSLEW Output Slew Fall Time CLOAD = 1nF, RSLEW = 100k 90 ns SLEWVT RSLEW Disable Threshold 2.75 V DLY Output Dead Time RT = 10k 90 ns
Fault
OPENTH Open Thermistor Threshold VSET = 5V, Measured with Respect to VSET – 410 mV SHRTTH Shorted Thermistor Threshold VSET = 5V, Measured with Respect to GND 0.975 V FLTV Fault Output Low Voltage 1mA Into FAULT, During Fault 150 300 mV
Direction Comparator
DIRH Low-to-High Threshold TEC – = 2.5V, Measured with Respect to TEC – 50 mV Sensed When H/C Toggles Low DIRL High-to-Low Threshold TEC – = 2.5V, Measured with Respect to TEC – – 50 mV Sensed When H/C Toggles High HCV H/C Output Low Voltage 1mA Into Pin 150 300 mV
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Guaranteed by design, not tested in production. of a device may be impaired.
Note 2:
The LTC1923E is guaranteed to meet specifications from 0°C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. 1923f 4
