LTC2414/LTC2418 8-/16-Channel 24-Bit No Latency ADCs Fea T Descrip T n 8-/16-Channel Single-Ended or 4-/8-Channel The LTC 2414/LTC2418 are 8-/16-channel (4-/8-differen- Differential Inputs (LTC2414/LTC2418) tial) micropower 24-bit analog-to-digital converters. n Low Supply Current (200A, 4A in Autosleep) They operate from 2.7V to 5.5V and include an integrated n Differential Input and Differential Reference with oscillator, 2ppm INL and 0.2ppm RMS noise. They use GND to V Common Mode Range delta-sigma technology and provide single cycle settling CC n 2ppm INL, No Missing Codes time for multiplexed applications. Through a single pin, n 2.5ppm Full-Scale Error and 0.5ppm Offset the LTC2414/LTC2418 can be configured for better than n 0.2ppm Noise 110dB differential mode rejection at 50Hz or 60Hz 2%, n No Latency: Digital Filter Settles in a Single Cycle or they can be driven by an external oscillator for a user- Each Conversion Is Accurate, Even After a New defined rejection frequency. The internal oscillator requires Channel Is Selected no external frequency setting components. n Single Supply 2.7V to 5.5V Operation The LTC2414/LTC2418 accept any external differential n Internal OscillatorNo External Components reference voltage from 0.1V to V for flexible ratiomet- CC Required ric and remote sensing measurement applications. They n 110dB Min, 50Hz/60Hz Notch Filter can be configured to take 4/8 differential channels or 8/16 single-ended channels. The full-scale bipolar input a T range is from 0.5V to 0.5V . The reference common REF REF n Direct Sensor Digitizer mode voltage, V , and the input common mode volt- REFCM n Weight Scales age, V , may be independently set within GND to V . INCM CC n Direct Temperature Measurement The DC common mode input rejection is better than 140dB. n Gas Analyzers The LTC2414/LTC2418 communicate through a flexible n Strain Gauge Transducers 4-wire digital interface that is compatible with SPI and n Instrumentation MICROWIRE protocols. n Data Acquisition L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Industrial Process Control No Latency is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T Total Unadjusted Error vs Input Voltage 2.7V TO 5.5V 3 V = 5V CC 1F V = 5V REF 11 9 2 V = V = 2.5V INCM REFCM + V CC REF V 21 CH0 CC F = GND O = 50Hz REJECTION 19 22 CH1 F = EXTERNAL OSCILLATOR O 1 T = 25C = 60Hz REJECTION A 20 28 CH7 0 SDI 16-CHANNEL 18 1 CH8 + MUX DIFFERENTIAL SCK T = 45C 4-WIRE A THERMOCOUPLE 17 24-BIT ADC SDO SPI INTERFACE 1 T = 85C A 16 CS 8 CH15 10 COM 2 3 12 REF 2.5 2 1.5 1 0.5 0 0.5 1.0 1.5 2.0 2.5 15 INPUT VOLTAGE (V) GND LTC2418 2414/18 TA01b 241418 TA01a 241418fb 1 For more information www.linear.com/LTC2414 TUE (ppm OF V ) REF ion pplica ions pplica ion uresLTC2414/LTC2418 a Te Maxi Mu M r a T (Notes 1, 2) Supply Voltage (V ) to GND ....................... 0.3V to 7V Operating Temperature Range CC Analog Input Voltage to GND ........0.3V to (V + 0.3V) LTC2414/LTC2418C .................................. 0C to 70C CC Reference Input Voltage to GND ...0.3V to (V + 0.3V) LTC2414/LTC2418I ...............................40C to 85C CC Digital Input Voltage to GND .........0.3V to (V + 0.3V) Storage Temperature Range .................. 65C to 150C CC Digital Output Voltage to GND .......0.3V to (V + 0.3V) Lead Temperature (Soldering, 10 sec) ...................300C CC p in c F T TOP VIEW TOP VIEW 1 CH7 1 CH7 NC 28 CH8 28 2 CH6 2 CH6 NC 27 CH9 27 3 CH5 3 CH5 NC 26 CH10 26 4 CH4 4 CH4 NC 25 CH11 25 5 CH3 5 CH3 NC 24 CH12 24 6 CH2 6 CH2 NC 23 CH13 23 7 CH1 7 CH1 NC 22 CH14 22 8 CH0 8 CH0 NC 21 CH15 21 9 SDI 9 SDI V 20 V 20 CC CC 10 F 10 F COM 19 COM 19 O O + + 11 SCK 11 SCK REF 18 REF 18 12 SDO 12 SDO REF 17 REF 17 13 CS 13 CS NC 16 NC 16 14 GND 14 GND NC 15 NC 15 GN PACKAGE GN PACKAGE 28-LEAD PLASTIC SSOP 28-LEAD PLASTIC SSOP T = 125C, = 110C/W T = 125C, = 110C/W JMAX JA JMAX JA o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2414CGN PBF LTC2414CGN TRPBF 2414 28-Lead Plastic SSOP 0C to 70C LTC2414IGN PBF LTC2414IGN TRPBF 2414 28-Lead Plastic SSOP 40C to 85C LTC2418CGN PBF LTC2418CGN TRPBF 2418 28-Lead Plastic SSOP 0C to 70C LTC2418IGN PBF LTC2418IGN TRPBF 2418 28-Lead Plastic SSOP 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: