LTC2344-16 Quad, 16-Bit, 400ksps/ch Differential SoftSpan ADC with Wide Input Common Mode Range FEATURES DESCRIPTION n 400ksps per Channel Throughput The LTC 2344-16 is a 16-bit, low noise 4-channel simulta- n Four Simultaneous Sampling Channels neous sampling successive approximation register (SAR) n ADC with differential, wide common mode range inputs. 1.25LSB INL (Maximum) n Operating from a 5V supply and using the internal reference Guaranteed 16-Bit, No Missing Codes TM n and buffer, each channel of this SoftSpan ADC can be Differential, Wide Common Mode Range Inputs n independently configured on a conversion-by-conversion Per-Channel SoftSpan Input Ranges: basis to accept 4.096V, 0V to 4.096V, 2.048V, or 0V to 4.096V, 0V to 4.096V, 2.048V, 0V to 2.048V 2.048V signals. Individual channels may also be disabled 5V, 0V to 5V, 2.5V, 0V to 2.5V to increase throughput on the remaining channels. n 93.4dB Single-Conversion SNR (Typical) n 114dB THD (Typical) at f = 2kHz IN The wide input common mode range and 102dB CMRR of n 102dB CMRR (Typical) at f = 200Hz IN the LTC2344-16 analog inputs allow the ADC to directly n Rail-to-Rail Input Overdrive Tolerance digitize a variety of signals, simplifying signal chain design. n Guaranteed Operation to 125C This input signal flexibility, combined with 1.25LSB INL, n Integrated Reference and Buffer (4.096V) no missing codes at 16 bits, and 93.4dB SNR, makes the n SPI CMOS (1.8V to 5V) and LVDS Serial I/O LTC2344-16 an ideal choice for many applications requir- n Internal Conversion Clock, No Cycle Latency ing wide dynamic range. n 81mW Power Dissipation (Typical) The LTC2344-16 supports pin-selectable SPI CMOS (1.8V n 32-Lead (5mm 5mm) QFN Package to 5V) and LVDS serial interfaces. Between one and four lanes of data output may be employed in CMOS mode, APPLICATIONS allowing the user to optimize bus width and throughput. All registered trademarks and trademarks are the property of their respective owners. Protected n Programmable Logic Controllers by U.S. Patents, including 7705765, 7961132, 8319673, 9197235. n Industrial Process Control n Medical Imaging n High Speed Data Acquisition TYPICAL APPLICATION 5V 1.8V TO 5V Integral Nonlinearity 0.1F 2.2F 0.1F vs Output Code and Channel CMOS OR LVDS 1.00 I/O INTERFACE 4.096V RANGE FULLY + V V OV 0.75 FULLY DIFFERENTIAL DRIVE (IN = IN ) DD DDLBYP DD LVDS/CMOS + ARBITRARY DIFFERENTIAL IN0 ALL CHANNELS S/H PD 5V 5V IN0 0.50 LTC2344-16 0.25 SDO0 0V 0V S/H 0 16-BIT MUX SDO3 SAR ADC UNIPOLAR BIPOLAR 0.25 SCKO 5V 5V SCKI S/H 0.50 SDI CS 0.75 BUSY + 0V 0V SAMPLE IN3 CNV S/H CLOCK IN3 1.00 + REFBUF REFIN GND DIFFERENTIAL INPUTS IN /IN WITH 32768 16384 0 16384 32768 WIDE INPUT COMMON MODE RANGE 234416 TA01a OUTPUT CODE 47F 0.1F 234416 TA01b FOUR SIMULTANEOUS SAMPLING CHANNELS Rev A 1 Document Feedback For more information www.analog.com INL ERROR (LSB)LTC2344-16 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) TOP VIEW Supply Voltage (V ) ..................................................6V DD Supply Voltage (OV ) ................................................6V DD Internal Regulated Supply Bypass (V ) ... (Note 3) DDLBYP 32 31 30 29 28 27 26 25 Analog Input Voltage + + + IN3 1 24 SDO /SDO3 IN0 to IN3 , + IN3 2 23 SCKO /SDO2 IN0 to IN3 (Note 4) .................. 0.3V to (V + 0.3V) DD + IN2 3 22 SCKO /SCKO REFIN .................................................... 0.3V to 2.8V + IN2 OV 4 21 DD 33 REFBUF, CNV (Note 4) ............. 0.3V to (V + 0.3V) GND DD IN1 5 20 GND + Digital Input Voltage (Note 4) ..... 0.3V to (OV + 0.3V) IN1 6 19 SCKI /SCKI DD + IN0 7 18 SCKI /SDO1 Digital Output Voltage (Note 4) .. 0.3V to (OV + 0.3V) DD + IN0 8 17 SDI /SDO0 Power Dissipation .............................................. 500mW 9 10 11 12 13 14 15 16 Operating Temperature Range LTC2344C ................................................ 0C to 70C LTC2344I .............................................40C to 85C LTC2344H .......................................... 40C to 125C UH PACKAGE 32-LEAD (5mm 5mm) PLASTIC QFN LTC2344MP ....................................... 55C to 125C T = 150C, = 44C/W Storage Temperature Range .................. 65C to 150C JMAX JA EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2344CUH-16 PBF LTC2344CUH-16 TRPBF 234416 32-Lead (5mm 5mm) Plastic QFN 0C to 70C LTC2344IUH-16 PBF LTC2344IUH-16 TRPBF 234416 32-Lead (5mm 5mm) Plastic QFN 40C to 85C LTC2344HUH-16 PBF LTC2344HUH-16 TRPBF 234416 32-Lead (5mm 5mm) Plastic QFN 40C to 125C LTC2344MPUH-16 PBF LTC2344MPUH-16 TRPBF 234416 32-Lead (5mm 5mm) Plastic QFN 55C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: