Datasheet LTC2499 (Analog Devices) - 10

LTC2499
typical perForMance characteristics Offset Error vs Temperature Offset Error vs VCC Offset Error vs VREF (2x Speed Mode) (2x Speed Mode) (2x Speed Mode)
240 250 240 V V V CC = 5V REF = 2.5V CC = 5V 230 VREF = 5V VIN = 0V 230 VIN = 0V V V V IN = 0V IN(CM) = GND IN(CM) = GND 200 220 VIN(CM) = GND fO = GND 220 fO = GND f T T O = GND A = 25°C A = 25°C 210 210 150 200 200 190 100 190 OFFSET ERROR (µV) OFFSET ERROR (µV) OFFSET ERROR (µV) 180 180 50 170 170 160 0 160 –45 –30 –15 0 15 30 45 60 75 90 2 2.5 3 3.5 4 4.5 5 5.5 0 1 2 3 4 5 TEMPERATURE (°C) VCC (V) VREF (V) 2499 G33 2499 G34 2499 G35
PSRR vs Frequency at VCC PSRR vs Frequency at VCC PSRR vs Frequency at VCC (2x Speed Mode) (2x Speed Mode) (2x Speed Mode)
0 0 0 V V CC = 4.1V DC CC = 4.1V DC ±1.4V VCC = 4.1V DC ±0.7V REF+ = 2.5V REF+ = 2.5V REF+ = 2.5V –20 –20 REF– = GND REF– = GND –20 REF– = GND IN+ = GND IN+ = GND IN+ = GND –40 IN– = GND –40 IN– = GND –40 IN– = GND f f O = GND O = GND fO = GND –60 TA = 25°C –60 TA = 25°C –60 TA = 25°C –80 –80 –80 REJECTION (dB) RREJECTION (dB) REJECTION (dB) –100 –100 –100 –120 –120 –120 –140 –140 –140 1 10 100 1k 10k 100k 1M 0 20 40 60 80 100 120 140 160 180 200 220 30600 30650 30700 30750 30800 FREQUENCY AT V FREQUENCY AT V CC (Hz) CC (Hz) FREQUENCY AT VCC (Hz) 2499 G36 2499 G37 2499 G38
pin Functions GND (Pins 1, 4, 6, 31, 32, 33, 34):
Ground. Multiple
SDA (Pin 3):
Bidirectional Serial Data Line of the I2C Inter- ground pins internally connected for optimum ground cur- face. In the transmitter mode (read), the conversion result rent flow and VCC decoupling. Connect each one of these is output through the SDA pin, while in the receiver mode pins to a common ground plane through a low impedance (write), the device channel select and configuration bits connection. All seven pins must be connected to ground are input through the SDA pin. The pin is high impedance for proper operation. during the data input mode and is an open drain output
SCL (Pin 2):
Serial Clock Pin of the I2C Interface. The (requires an appropriate pull-up device to VCC) during the LTC2499 can only act as a slave and the SCL pin only data output mode. accepts an external serial clock. Data is shifted into the
NC (Pin 5):
No Connect. This pin can be left floating or SDA pin on the rising edges of the SCL clock and output tied to GND. through the SDA pin on the falling edges of the SCL clock. 2499fe 10 For more information www.linear.com/LTC2499 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics (normal speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference I2C Inputs And Digital Outputs Power Requirements Digital Inputs And Digital Outputs I2C Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Package Description Revision History Related Parts