LTC1852/LTC1853 8-Channel, 10-Bit/12-Bit, 400ksps, Low Power, Sampling ADCs FEATURES DESCRIPTION n Flexible 8-Channel Multiplexer The 10-bit LTC 1852 and 12-bit LTC1853 are complete Single-Ended or Differential Inputs 8-channel data acquisition systems. They include a exible Two Gain Ranges 8-channel multiplexer, a 400ksps successive approxima- Unipolar or Bipolar Operation tion analog-to-digital converter, an internal reference and a n Scan Mode and Programmable Sequencer parallel output interface. The multiplexer can be con gured Eliminate Con guration Software Overhead for single-ended or differential inputs, two gain ranges and n Low Power: 3mW at 250ksps unipolar or bipolar operation. The ADCs have a scan mode n 2.7V to 5.5V Supply Range that will repeatedly cycle through all 8 multiplexer channels n Internal or External Reference Operation and can also be programmed to sequence through up to n Parallel Output Includes MUX Address 16 addresses and con gurations. The sequence can also n Nap and Sleep Shutdown Modes be read back from internal memory. n Pin Compatible up-grade 1.25Msps 10-Bit LTC1850 The reference and buffer ampli er provide pin strappable and 12-Bit LTC1851 ranges of 4.096V, 2.5V and 2.048V. The parallel output includes the 10-bit or 12-bit conversion result plus the APPLICATIONS 4-bit multiplexer address. The digital outputs are pow- n High Speed Data Acquisition ered from a separate supply allowing for easy interface n Test and Measurement to 3V digital logic. Typical power consumption is 10mW n Imaging Systems at 400ksps from a single 5V supply and 3mW at 250ksps n Telecommunications from a single 3V supply. n Industrial Process Control , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n Spectrum Analysis BLOCK DIAGRAM LTC1853 M1 CH0 SHDN CS CH1 CONVST RD Integral Linearity CONTROL LOGIC CH2 WR AND 1.0 DIFF PROGRAMMABLE A2 CH3 SEQUENCER A1 A0 8-CHANNEL INTERNAL CH4 UNI/BIP MULTIPLEXER CLOCK PGA 0.5 M0 CH5 OV DD CH6 BUSY DIFF /S6 0 OUT CH7 A2 /S5 OUT A1 /S4 OUT A0 /S3 OUT COM D11/S2 D10/S1 0.5 2.5V D9/S0 12-BIT + DATA REFOUT OUTPUT D8 REFERENCE SAMPLING LATCHES DRIVERS D7 ADC D6 D5 1.0 D4 0 512 1024 1536 2048 2560 3072 3584 4096 D3 REFIN REF AMP CODE D2 1852 F01 D1 D0 REFCOMP OGND 18523 BD 18523fa 1 INL ERROR (LSBs)LTC1852/LTC1853 ABSOLUTE MAXIMUM RATINGS OV = V (Note 1, 2) DD DD Supply Voltage (V ) ..................................................6V Ambient Operating Temperature Range DD Analog Input Voltage (Note 3) ..... 0.3V to (V + 0.3V) LTC1852C/LTC1853C .............................. 0C to 70C DD Digital Input Voltage (Note 4) .................... 0.3V to 10V LTC1852I/LTC1853I ............................. 40C to 85C Digital Output Voltage ..................0.3V to (V + 0.3V) Storage Temperature Range ...................65C to 150C DD Power Dissipation ...............................................500mW Lead Temperature (Soldering, 10 sec) ................. 300C PIN CONFIGURATION LTC1852 LTC1853 TOP VIEW TOP VIEW 1 48 M1 1 48 M1 CH0 CH0 CH1 2 47 SHDN CH1 2 47 SHDN CH2 3 46 CS CH2 3 46 CS 4 CONVST 4 CONVST CH3 45 CH3 45 CH4 5 44 RD CH4 5 44 RD 6 43 WR 6 43 WR CH5 CH5 CH6 7 42 DIFF CH6 7 42 DIFF CH7 8 41 A2 CH7 8 41 A2 9 A1 9 A1 COM 40 COM 40 REFOUT 10 39 A0 REFOUT 10 39 A0 11 38 UNI/BIP 11 38 UNI/BIP REFIN REFIN REFCOMP 12 37 PGA REFCOMP 12 37 PGA GND 13 36 M0 GND 13 36 M0 14 OV 14 OV V 35 V 35 DD DD DD DD V 15 34 OGND V 15 34 OGND DD DD 16 33 BUSY 16 33 BUSY GND GND DIFF /S6 17 32 NC DIFF /S6 17 32 D0 OUT OUT A2 /S5 18 31 NC A2 /S5 18 31 D1 OUT OUT 19 D0 19 D2 A1 /S4 30 A1 /S4 30 OUT OUT A0 /S3 20 29 D1 A0 /S3 20 29 D3 OUT OUT 21 28 D2 21 28 D4 D9/S2 D11/S2 D8/S1 22 27 D3 D10/S1 22 27 D5 D7/S0 23 26 D4 D9/S0 23 26 D6 24 D5 24 D7 D6 25 D8 25 FW PACKAGE FW PACKAGE 48-LEAD PLASTIC TSSOP 48-LEAD PLASTIC TSSOP T = 150C, = 110C/W T = 150C, = 110C/W JMAX JA JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1852CFW PBF LTC1852CFW TRPBF LTC1852CFW 48-Lead Plastic TSSOP (6.1mm) 0C to 70C LTC1852IFW PBF LTC1852IFW TRPBF LTC1852IFW 48-Lead Plastic TSSOP (6.1mm) 40C to 85C LTC1853CFW PBF LTC1853CFW TRPBF LTC1853CFW 48-Lead Plastic TSSOP (6.1mm) 0C to 70C LTC1853IFW PBF LTC1853IFW TRPBF LTC1853IFW 48-Lead Plastic TSSOP (6.1mm) 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: