LTC2435/LTC2435-1 20-Bit No Latency ADCs with Differential Input and Differential Reference Fea T Descrip T n 2 Speed Up Version of the LTC2430: 15Hz Output The LTC 2435/LTC2435-1 are 2.7V to 5.5V micropower Rate, 60Hz NotchLTC2435 13.75Hz Output Rate, 20-bit differential analog to digital converters with Simultaneous 50Hz/60Hz NotchLTC2435-1 integrated oscillator, 3ppm INL and 0.8ppm RMS noise. n Differential Input and Differential Reference with They use delta-sigma technology and provide single GND to V Common Mode Range cycle settling time for multiplexed applications. Through CC n a single pin, the LTC2435 can be configured for better 3ppm INL, No Missing Codes n than 110dB input differential mode rejection at 50Hz or 10ppm Gain Error n 60Hz 2%, or it can be driven by an external oscillator 0.8ppm Noise n for a user defined rejection frequency. The LTC2435-1 Single Conversion Settling Time for Multiplexed can be configured for better than 87dB input differential Applications n mode rejection over the range of 49Hz to 61.2Hz (50Hz Internal OscillatorNo External Components Required n and 60Hz 2% simultaneously). The internal oscillator Single Supply 2.7V to 5.5V Operation requires no external frequency setting components. n Low Supply Current (200A,4A in Auto Sleep) n 20-Bit ADC in Narrow SSOP-16 Package The converters accept any external differential reference (SO-8 Footprint) voltage from 0.1V to V for flexible ratiometric and re- CC mote sensing measurement configurations. The full-scale a T differential input range is from 0.5V to 0.5V . The REF REF n Direct Sensor Digitizer reference common mode voltage, V , and the input REFCM n Weight Scales common mode voltage, V , may be independently set INCM n Direct Temperature Measurement anywhere within the GND to V range of the LTC2435/ CC n Gas Analyzers LTC2435-1. The DC common mode input rejection is n Strain Gage Transducers better than 120dB. n Instrumentation The LTC2435/LTC2435-1 communicate through a flexible n Data Acquisition 3-wire digital interface which is compatible with SPI and n Industrial Process Control MICROWIRE protocols. n 6-Digit DVMs L, LT, LTC and LTM are registered trademarks and C-Load and No Latency are trademarks of Linear Technology Corporation. Protected by U.S. Patents including 6140950, 6169506. Typical a T Integral Nonlinearity vs Input 10 2.7V TO 5.5V 8 V CC 1F = INTERNAL OSC/50Hz REJECTION (LTC2435) 6 2 14 = EXTERNAL CLOCK SOURCE V F CC O = INTERNAL OSC/60Hz REJECTION (LTC2435) 4 LTC2435/ = INTERNAL 50Hz/60Hz REJECTION (LTC2435-1) T = 25C A LTC2435-1 2 T = 85C 3 A + REFERENCE 13 0 REF SCK VOLTAGE 4 2 REF 0.1V TO V T = 45C CC A 3-WIRE 4 5 12 SPI INTERFACE + ANALOG INPUT RANGE IN SDO F = GND O 0.5V TO 0.5V REF REF 6 6 11 V = 5V CC IN CS V = 5V REF 1, 7, 8, 9, 10, 15, 16 8 GND V = V = 2.5V INCM INCM 2435 TA01 10 2.5 1.5 0.5 0.5 1.5 2.5 INPUT VOLTAGE (V) 2435 TA01b 24351fc 1 For more information www.linear.com/LTC2435 INL (ppm OF V ) REF ions pplica ions pplica ion uresLTC2435/LTC2435-1 a Te Maxi Mu M r a T p c F T (Notes 1, 2) TOP VIEW Supply Voltage (V ) to GND .......................0.3V to 7V CC 1 16 GND GND Analog Input Pins Voltage to GND 0.3V to (V + 0.3V) CC 2 15 V GND CC Reference Input Pins Voltage + 3 14 REF F O to GND ..........................................0.3V to (V + 0.3V) CC 4 13 REF SCK Digital Input Voltage to GND .........0.3V to (V + 0.3V) CC + 5 12 IN SDO Digital Output Voltage to GND .......0.3V to (V + 0.3V) CC 6 11 IN CS Operating Temperature Range 7 10 GND GND LTC2435C/LTC2435-1C ........................... 0C to 70C 8 9 GND GND LTC2435I/LTC2435-1I ......................... 40C to 85C GN PACKAGE 16-LEAD PLASTIC SSOP Storage Temperature Range ................... 65C to 150C T = 125C, = 95C/W JMAX JA Lead Temperature (Soldering, 10 sec) .................. 300C o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2435CGN PBF LTC2435CGN TRPBF 2435 16-Lead Plastic SSOP 0C to 70C LTC2435IGN PBF LTC2435CGN TRPBF 2435I 16-Lead Plastic SSOP 40C to 85C LTC2435-1CGN PBF LTC2435-1CGN TRPBF 24351 16-Lead Plastic SSOP 0C to 70C LTC2435-1IGN PBF LTC2435-1IGN TRPBF 24351I 16-Lead Plastic SSOP 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: