LTC2433-1 Differential Input 16-Bit No Latency DS ADC FEATURES DESCRIPTIO n 16-Bit Differential ADC in a Tiny MSOP The LTC 2433-1 is a differential input micropower 16-bit TM n Low Supply Current: 200m A, 4m A in Autosleep No Latency analog-to-digital converter with an inte- n Rail-to-Rail Differential Input/Reference grated oscillator. It provides 0.12LSB INL and 1.45m V n 0.12LSB INL, No Missing Codes RMS noise independent of V . It uses delta-sigma REF n 0.16LSB Full-Scale Error and 5m V Offset technology and provides single conversion settling of the n 1.45m V RMS Noise, Independent of V digital filter. Through a single pin, the LTC2433-1 can be REF n Very Low Transition Noise: <0.02LSB configured for better than 87dB input differential mode n Operates with a Reference as Low as 100mV with rejection at 50Hz and 60Hz 2%, or it can be driven by an 16-Bit Resolution external oscillator for a user defined rejection frequency. n Internal OscillatorNo External Components The internal oscillator requires no external frequency Required setting components. n 87dB Min, Simultaneous 50Hz and 60Hz Notch Filter The converter accepts any external differential reference n Single Supply 2.7V to 5.5V Operation voltage from 0.1V to V for flexible ratiometric and CC n Pin Compatible with the 20/24-Bit LTC2431/LTC2411 remote sensing measurement configurations. The full- n Available in 10-Lead MSOP Package scale differential input range is from 0.5 V to 0.5 REF U V . The reference common mode voltage, V , and REF REFCM APPLICATIO S the input common mode voltage, V , may be indepen- INCM n dently set anywhere between GND and V . The DC Direct Sensor Digitizer CC n common mode input rejection is better than 140dB. Weight Scales n Direct Temperature Measurement The LTC2433-1 communicates through a flexible 3-wire n Gas Analyzers digital interface which is compatible with SPI and n TM Strain-Gage Transducers MICROWIRE protocols. n Instrumentation , LTC and LT are registered trademarks of Linear Technology Corporation. n No Latency DS is a trademark of Linear Technology Corporation. Data Acquisition MICROWIRE is a trademark of National Semiconductor Corporation. n Industrial Process Control TYPICAL APPLICATIO Minimum Resolvable Signal vs V REF 90 5V REF 80 1F 70 = EXTERNAL CLOCK SOURCE 110 = INTERNAL OSC/SIMULTANEOUS 4.9k V F CC O 60 (100mV) 2 50Hz/60Hz REJECTION + REF 50 4 + IN 100 40 LTC2433-1 5 9 30 IN SCK 3 8 3-WIRE 20 REF SDO SPI INTERFACE 6 7 10 GND CS 24331 TA01 0 0132 4 5 V (V) 24331 TA02 REF *FOR V 0.5V THE RESOLUTION REF IS LIMITED BY STEP SIZE 24331fa 1 MINIMUM RESOLVABLE SIGNAL (V)* U DS ULTC2433-1 UU W ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Notes 1, 2) ORDER PART NUMBER Supply Voltage (V ) to GND.......................0.3V to 7V CC Analog Input Voltage LTC2433-1CMS TOP VIEW to GND .................................... 0.3V to (V + 0.3V) CC V 1 10 F CC O LTC2433-1IMS + Reference Input Voltage REF 2 9 SCK REF 3 8 SDO to GND .................................... 0.3V to (V + 0.3V) + CC IN 4 7 CS IN 5 6 GND Digital Input Voltage to GND ........ 0.3V to (V + 0.3V) CC MS PART MARKING MS10 PACKAGE Digital Output Voltage to GND ..... 0.3V to (V + 0.3V) CC 10-LEAD PLASTIC MSOP Operating Temperature Range T = 125 C, q = 110 C/W JMAX JA LTAEY LTC2433-1C ............................................ 0 C to 70 C LTAEZ LTC2433-1I ........................................ 40 C to 85 C Storage Temperature Range ................. 65 C to 150 C Lead Temperature (Soldering, 10 sec).................. 300 C Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. (Notes 3, 4, 6) A PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution (No Missing Codes) 0.1V V V , 0.5 V V 0.5 V , (Note 5) l 16 Bits REF CC REF IN REF + Integral Nonlinearity (Note 15) 5V V 5.5V, REF = 2.5V, REF = GND, V = 1.25V, (Note 6) 0.06 LSB CC INCM + 5V V 5.5V, REF = 5V, REF = GND, V = 2.5V, (Note 6) l 0.12 1.25 LSB CC INCM + REF = 2.5V, REF = GND, V = 1.25V, (Note 6) 0.30 LSB INCM + Offset Error (Note 15) 2.5V REF V , REF = GND, l 520 m V CC + = IN V , (Note 13) GND IN CC + Offset Error Drift 2.5V REF V , REF = GND, 20 nV/ C CC + GND IN = IN V CC + Positive Full-Scale Error (Note 15) 2.5V REF V , REF = GND, l 0.16 1.25 LSB CC + + + IN = 0.75REF , IN = 0.25 REF + Positive Full-Scale Error Drift 2.5V REF V , REF = GND, 0.04 ppm of V / C CC REF + + + IN = 0.75REF , IN = 0.25 REF + Negative Full-Scale Error (Note 15) 2.5V REF V , REF = GND, l 0.16 1.25 LSB CC + + + IN = 0.25 REF , IN = 0.75 REF + Negative Full-Scale Error Drift 2.5V REF V , REF = GND, 0.04 ppm of V / C CC REF + + + IN = 0.25 REF , IN = 0.75 REF + Total Unadjusted Error 5V V 5.5V, REF = 2.5V, REF = GND, V = 1.25V 0.20 LSB CC INCM + 5V V 5.5V, REF = 5V, REF = GND, V = 2.5V 0.20 LSB CC INCM + REF = 2.5V, REF = GND, V = 1.25V, (Note 6) 0.25 LSB INCM + Output Noise 5V V 5.5V, REF = 5V, REF = GND, 1.45 m V CC RMS + GND IN = IN V , (Note 12) CC 24331fa 2 U WWW