Datasheet LT1994 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Low Noise, Low Distortion Fully Differential Input/Output Amplifier/Driver |
| Pages / Page | 20 / 5 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| File Format / Size | PDF / 232 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
Model Line for this Datasheet
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LT1994
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. V+ = 3V, V– = 0V, VCM = VOCM = VICM = mid-supply, VSHDN = OPEN, RI = RF = 499
Ω
, RL = 800
Ω
to a mid-supply voltage (See Figure 1) unless otherwise noted. VS is defi ned (V+ – V–). VOUTCM is defi ned as (V + – + – + – + – OUT + VOUT )/2. VICM is defi ned as (VIN + VIN )/2. VOUTDIFF is defi ned as (VOUT – VOUT ). VINDIFF is defi ned as (VIN – VIN ). C/I GRADES H/MP GRADES SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
VIL SHDN Input Logic Low VS = 3V to ±5V l V+ V+ V – 2.1 – 2.1 VIH SHDN Input Logic High VS = 3V to ±5V l V+ V+ V – 0.6 – 0.6 RSHDN SHDN Pull-Up Resistor VS = 2.375V to ±5V 40 55 75 40 55 75 kΩ tON Turn-On Time VSHDN 0.5V to 3V 1 1 μs tOFF Turn-Off Time VSHDN 3V to 0.5V 1 1 μs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 7:
Input Common Mode Range is tested using the Test Circuit of may cause permanent damage to the device. Exposure to any Absolute Figure 1 (RF = RI) by applying a single ended 2VP-P, 1kHz signal to VINP Maximum Rating condition for extended periods may affect device (VINM = 0), and measuring the output distortion (THD) at the common reliability and lifetime. mode Voltage Range limits listed in the Electrical Characteristics table,
Note 2:
The inputs are protected by a pair of back-to-back diodes. If the and confi rming the output THD is better than –40dB. The voltage range for differential input voltage exceeds 1V, the input current should be limited to the output common mode range (Pin 2) is tested using the Test Circuit of less than 10mA. Figure 1 (RF = RI) by applying a 0.5V peak, 1kHz signal to the VOCM
Note 3:
A heat sink may be required to keep the junction temperature Pin 2 (with VINP = VINM = 0) and measuring the output distortion (THD) below the absolute maximum rating when the output is shorted at VOUTCM with VOCM biased 0.5V from the VOCM pin range limits listed indefi nitely. in the Electrical Characteristics Table, and confi rming the THD is better
Note 4:
The LT1994C/LT1994I are guaranteed functional over the than –40dB. operating temperature range –40°C to 85°C. The LT1994H is guaranteed
Note 8:
Input CMRR is defi ned as the ratio of the change in the input functional over the operating temperature range –40°C to 125°C. The common mode voltage at the pins IN+ or IN– to the change in differential LT1994MP is guaranteed functional over the operating temperature range input referred voltage offset. Output CMRR is defi ned as the ratio of the –55°C to 125°C. change in the voltage at the VOCM pin to the change in differential input
Note 5:
The LT1994C is guaranteed to meet specifi ed performance from referred voltage offset. 0°C to 70°C. The LT1994C is designed, characterized, and expected to
Note 9:
Differential Power Supply Rejection (PSRR) is defi ned as the ratio meet specifi ed performance from –40°C to 85°C but is not tested or of the change in supply voltage to the change in differential input referred QA sampled at these temperatures. The LT1994I is guaranteed to meet voltage offset. Common Mode Power Supply Rejection (PSRRCM) is specifi ed performance from –40°C to 85°C. The LT1994H is guaranteed defi ned as the ratio of the change in supply voltage to the change in the to meet specifi ed performance from –40°C to 125°C. The LT1994MP is common mode offset, VOUTCM – VOCM. guaranteed to meet specifi ed performance from –55°C to 125°C.
Note 10:
Output swings are measured as differences between the output
Note 6:
Input bias current is defi ned as the average of the input currents and the respective power supply rail. fl owing into Pin 1 and Pin 8 (IN– and IN+). Input Offset current is defi ned
Note 11:
Extended operation with the output shorted may cause junction as the difference of the input currents fl owing into Pin 8 and Pin 1 temperatures to exceed the 150°C limit and is not recommended. (I + – OS = IB – IB ). 1994fb 5
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. V+ = 3V, V– = 0V, VCM = VOCM = VICM = mid-supply, VSHDN = OPEN, RI = RF = 499
Ω
, RL = 800
Ω
to a mid-supply voltage (See Figure 1) unless otherwise noted. VS is defi ned (V+ – V–). VOUTCM is defi ned as (V + – + – + – + – OUT + VOUT )/2. VICM is defi ned as (VIN + VIN )/2. VOUTDIFF is defi ned as (VOUT – VOUT ). VINDIFF is defi ned as (VIN – VIN ). C/I GRADES H/MP GRADES SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
VIL SHDN Input Logic Low VS = 3V to ±5V l V+ V+ V – 2.1 – 2.1 VIH SHDN Input Logic High VS = 3V to ±5V l V+ V+ V – 0.6 – 0.6 RSHDN SHDN Pull-Up Resistor VS = 2.375V to ±5V 40 55 75 40 55 75 kΩ tON Turn-On Time VSHDN 0.5V to 3V 1 1 μs tOFF Turn-Off Time VSHDN 3V to 0.5V 1 1 μs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 7:
Input Common Mode Range is tested using the Test Circuit of may cause permanent damage to the device. Exposure to any Absolute Figure 1 (RF = RI) by applying a single ended 2VP-P, 1kHz signal to VINP Maximum Rating condition for extended periods may affect device (VINM = 0), and measuring the output distortion (THD) at the common reliability and lifetime. mode Voltage Range limits listed in the Electrical Characteristics table,
Note 2:
The inputs are protected by a pair of back-to-back diodes. If the and confi rming the output THD is better than –40dB. The voltage range for differential input voltage exceeds 1V, the input current should be limited to the output common mode range (Pin 2) is tested using the Test Circuit of less than 10mA. Figure 1 (RF = RI) by applying a 0.5V peak, 1kHz signal to the VOCM
Note 3:
A heat sink may be required to keep the junction temperature Pin 2 (with VINP = VINM = 0) and measuring the output distortion (THD) below the absolute maximum rating when the output is shorted at VOUTCM with VOCM biased 0.5V from the VOCM pin range limits listed indefi nitely. in the Electrical Characteristics Table, and confi rming the THD is better
Note 4:
The LT1994C/LT1994I are guaranteed functional over the than –40dB. operating temperature range –40°C to 85°C. The LT1994H is guaranteed
Note 8:
Input CMRR is defi ned as the ratio of the change in the input functional over the operating temperature range –40°C to 125°C. The common mode voltage at the pins IN+ or IN– to the change in differential LT1994MP is guaranteed functional over the operating temperature range input referred voltage offset. Output CMRR is defi ned as the ratio of the –55°C to 125°C. change in the voltage at the VOCM pin to the change in differential input
Note 5:
The LT1994C is guaranteed to meet specifi ed performance from referred voltage offset. 0°C to 70°C. The LT1994C is designed, characterized, and expected to
Note 9:
Differential Power Supply Rejection (PSRR) is defi ned as the ratio meet specifi ed performance from –40°C to 85°C but is not tested or of the change in supply voltage to the change in differential input referred QA sampled at these temperatures. The LT1994I is guaranteed to meet voltage offset. Common Mode Power Supply Rejection (PSRRCM) is specifi ed performance from –40°C to 85°C. The LT1994H is guaranteed defi ned as the ratio of the change in supply voltage to the change in the to meet specifi ed performance from –40°C to 125°C. The LT1994MP is common mode offset, VOUTCM – VOCM. guaranteed to meet specifi ed performance from –55°C to 125°C.
Note 10:
Output swings are measured as differences between the output
Note 6:
Input bias current is defi ned as the average of the input currents and the respective power supply rail. fl owing into Pin 1 and Pin 8 (IN– and IN+). Input Offset current is defi ned
Note 11:
Extended operation with the output shorted may cause junction as the difference of the input currents fl owing into Pin 8 and Pin 1 temperatures to exceed the 150°C limit and is not recommended. (I + – OS = IB – IB ). 1994fb 5
