Datasheet LT1999-10, LT1999-20, LT1999-50 (Analog Devices) - 7

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ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, –55°C < TA < 150°C for MP-grade parts, otherwise specifications are at TA = 25°C. V+ = 5V, GND = 0V, VCM = 12V, VREF = floating, VSHDN = floating, unless otherwise specified. See Figure 2. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
tr Common Mode Step Recovery Time LT1999-10 0.8 μs ΔVCM = ±50V, 20ns LT1999-20 1 μs (Note 10) LT1999-50 1.3 μs VS Supply Voltage (Note 11) l 4.5 5 5.5 V IS Supply Current VCM > 5.5V l 1.55 1.9 mA VCM = –5V l 5.8 7.1 mA V+ = 5.5V, VSHDN = 0.5V, VCM > 0V l 3 25 μA RO Output Impedance ΔIO = ±2mA 0.15 Ω ISRC Sourcing Output Current RLOAD = 50Ω to GND l 3 31 40 mA ISNK Sinking Output Current RLOAD = 50Ω to V+ l 10 26 40 mA VOUT Swing Output High (with Respect to V+) RLOAD = 1kΩ to Mid-Supply l 125 250 mV RLOAD = Open l 5 125 mV Swing Output Low (with Respect to V–) RLOAD = 1kΩ to Mid-Supply l 250 400 mV RLOAD = Open l 150 225 mV tON Turn-On Time VSHDN = 0V to 5V 1 μs tOFF Turn-Off Time VSHDN = 5V to 0V 1 μs
Note 1:
Stresses beyond those listed underAbsolute Maximum Ratings
Note 7:
Full-scale sense (VSENSE) gives indication of the maximum may cause permanent damage to the device. Exposure to any Absolute differential input that can be applied with better than 0.5% gain accuracy. Maximum Rating condition for extended periods may affect device Gain accuracy is degraded when the output saturates against either power reliability and lifetime. supply rail. VSENSE is verified with V+ = 5.5V, VCM = 12V, with the REF pin
Note 2:
Pin 2 (+IN) and Pin 3 (–IN) are protected by ESD voltage clamps set to it’s voltage range limits. The maximum VSENSE is verified with the which have asymmetric bidirectional breakdown characteristics with respect REF pin set to it’s minimum specified limit, verifying the gain error is less to the GND pin (Pin 5). These pins can safely support common mode than 0.5% at the output. The minimum VSENSE is verified with the REF pin voltages which vary from –5.25V to 88V without triggering an ESD clamp. set to its maximum specified limit, verifying the gain error at the output is
Note 3:
Exposure to differential sense voltages exceeding the normal less than 0.5%. See Note 9 for more information. operating range for extended periods of time may degrade part
Note 8:
IB is defined as the average of the input bias currents to the +IN performance. A heat sink may be required to keep the junction temperature and –IN pins (Pins 2 and 3). A positive current indicates current flowing below the Absolute Maximum Rating when the inputs are stressed into the pin. IOS is defined as the difference of the input bias currents. differentially. The amount of power dissipated in the LT1999 due to input IOS = I(+IN) – I(–IN) overdrive can be approximated by:
Note 9:
The REF pin voltage range is the minimum and maximum limits (V that ensures the input referred voltage offset does not exceed ±3mV over +IN − V−IN)2 PDISS = the I, C, and H temperature ranges, and ±3.5mV over the MP temperature 8kΩ range.
Note 4:
A heat sink may be required to keep the junction temperature below the absolute maximum rating.
Note 10:
Common mode recovery time is defined as the time it takes the output of the LT1999 to recover from a 50V, 20ns input common mode
Note 5:
The LT1999C/LT1999I are guaranteed functional over the operating voltage transition, and settle to within the DC amplifier specifications. temperature range –40°C to 85°C. The LT1999H is guaranteed functional over the operating temperature range –40°C to 125°C. The LT1999MP is
Note 11:
Operating the LT1999 with V+ < 4.5V is possible, although the guaranteed functional over the operating temperature range –55°C to 150°C. LT1999 is not tested or specified in this condition. See the Applications Junction temperatures greater than 125°C will promote accelerated aging. Information section. The LT1999 has a demonstrated typical life beyond 1000 hours at 150°C.
Note 6:
The LT1999C is guaranteed to meet specified performance from 0°C to 70°C. The LT1999C is designed, characterized, and expected to meet specified performance from –40°C to 85°C but is not tested or QA sampled at these temperatures. The LT1999I is guaranteed to meet specified performance from –40°C to 85°C. The LT1999H is guaranteed to meet specified performance from –40°C to 125°C. The LT1999MP is guaranteed to meet specified performance from –55°C to 150°C. Rev. E For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Applications Information Theory of Operation Typical Applications Package Description Revision History Typical Application Related Parts