LTC1609 16-Bit, 200ksps, Serial ADC with Multiple Input Ranges FEATURES DESCRIPTIO n Sample Rate: 200ksps The LTC 1609 is a 200ksps, serial sampling 16-bit A/D n Input Ranges converter that draws only 65mW (typical) from a single 5V Unipolar: 0V to 10V, 0V to 5V and 0V to 4V supply. This easy-to-use device includes a sample-and- Bipolar: 10V, 5V and 3.3V hold, a precision reference, a switched capacitor succes- n Guaranteed No Missing Codes sive approximation A/D and trimmed internal clock. n Serial I/O The input range is specified for bipolar inputs of 10V, n Single 5V Supply 5V and 3.3V and unipolar inputs of 0V to 10V, 0V to 5V n Power Dissipation: 65mW Typ and 0V to 4V. Maximum DC specs include 2LSB INL and n Power Down Mode: 50m W 16-bit no missing codes over temperature. It has a typical n SNR: 87dB Typ signal-to-noise ratio of 87dB. n Operates with Internal or External Reference n The ADC has a high speed serial interface. The serial 28-Pin SSOP and 20-Pin SO Packages n output data can be clocked out using either the internal Improved 2nd Source to ADS7809 and AD977A U serial shift clock or be clocked out by an external shift APPLICATIO S clock. A separate convert start input (R/C) and a data ready signal (BUSY) ease connections to FIFOs, DSPs and n Industrial Process Control microprocessors. n Multiplexed Data Acquisition Systems , LTC and LT are registered trademarks of Linear Technology Corporation. n High Speed Data Acquisition for PCs n Digital Signal Processing TYPICAL APPLICATIO 200kHz, 16-Bit Serial Sampling ADC Configured for 10V Inputs 200 1 28 ANALOG INPUT R1 V 5V IN DIG 10V TO 10V 2 27 + Nonaveraged 4096 Point FFT Plot AGND1 V ANA 0.1F 10F 100 3 26 0 R2 PWRD IN f = 200kHz 33.2k SAMPLE 4 25 f = 1kHz R3 BUSY IN IN 20 SINAD = 87.2dB 5 24 NC CS THD = 100.1dB 2.5V LTC1609 6 23 40 CAP NC + 2.5V 7 22 2.2F REF NC + 60 8 21 2.2F NC R/C 9 20 80 AGND2 NC 10 19 NC TAG SERIAL INTERFACE 100 11 18 NC NC 12 17 SB/BTC DATA 120 13 16 130 EXT/INT DATACLK 0 25 50 75 100 14 15 DGND SYNC FREQUENCY (kHz) 1609 G06 1609 TA01 1609fa 1 MAGNITUDE (dB) U ULTC1609 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) V .......................................................................... 7V Digital Input Voltage (Note 4) ........ DGND 0.3V to 10V ANA V to V ........................................................... 0.3V Digital Output Voltage ........ DGND 0.3V to V + 0.3V DIG ANA DIG V ........................................................................... 7V Power Dissipation.............................................. 500mW DIG Ground Voltage Difference Operating Ambient Temperature Range DGND, AGND1 and AGND2 .............................. 0.3V LTC1609AC/LTC1609C ............................ 0 C to 70 C Analog Inputs (Note 3) LTC1609AI/LTC1609I ......................... 40 C to 85 C R1 , R2 , R3 ................................................ 25V Storage Temperature Range ................. 65 C to 150 C IN IN IN CAP ............................ V + 0.3V to AGND2 0.3V Lead Temperature (Soldering, 10 sec).................. 300 C ANA REF ....................................Indefinite Short to AGND2 Momentary Short to V ANA PACKAGE/ORDER INFORMATION ORDER PART ORDER PART TOP VIEW NUMBER NUMBER 1 28 V R1 IN DIG TOP VIEW 2 27 V AGND1 ANA LTC1609CG LTC1609CSW R1 1 20 V IN DIG 3 26 PWRD R2 IN LTC1609IG LTC1609ISW AGND1 2 19 V ANA 4 25 BUSY R3 IN LTC1609ACSW R2 3 18 PWRD IN 5 24 CS NC LTC1609AISW R3 4 17 BUSY IN 6 23 NC CAP CAP 5 16 CS 7 22 NC REF REF 6 15 R/C 8 21 R/C NC AGND2 7 14 TAG 9 20 NC AGND2 SB/BTC 8 13 DATA 10 19 TAG NC EXT/INT 9 12 DATACLK 11 18 NC NC DGND 10 11 SYNC 12 17 DATA SB/BTC 13 16 DATACLK SW PACKAGE EXT/INT 20-LEAD PLASTIC SO 14 15 SYNC DGND T = 125 C, q = 130 C/W JMAX JA G PACKAGE 28-LEAD PLASTIC SSOP T = 125 C, q = 95 C/W JMAX JA Consult LTC Marketing for parts specified with wider operating temperature ranges. CONVERTER CHARACTERISTICS The l indicates specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. With external reference (Notes 5, 6). A LTC1609 LTC1609A PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Resolution l 16 16 Bits No Missing Codes l 15 16 Bits Transition Noise 0.9 0.9 LSB RMS Integral Linearity Error (Note 7) l 3 2LSB Differential Linearity Error l 2 3 1 1.75 LSB Bipolar Zero Error External Reference = 2.5V (Note 8), Bipolar Ranges l 10 10 mV 1609fa 2 U U W U U WWW