LTC1604 High Speed, 16-Bit, 333ksps Sampling A/D Converter with Shutdown FEATURES DESCRIPTION n A Complete, 333ksps 16-Bit ADC The LTC 1604 is a 333ksps, 16-bit sampling A/D con- n 90dB S/(N+D) and 100dB THD (Typ) verter that draws only 220mW from 5V supplies. This n Power Dissipation: 220mW (Typ) high performance device includes a high dynamic range n No Pipeline Delay sample-and-hold, a precision reference and a high speed n No Missing Codes over Temperature parallel output. Two digitally selectable power shutdown n Nap (7mW) and Sleep (10W) Shutdown Modes modes provide power savings for low power systems. n Operates with Internal 15ppm/C Reference The LTC1604s full-scale input range is 2.5V. Outstand- or External Reference ing AC performance includes 90dB S/(N+D) and 100dB n True Differential Inputs Reject Common Mode Noise THD at a sample rate of 333ksps. n 5MHz Full Power Bandwidth n The unique differential input sample-and-hold can acquire 2.5V Bipolar Input Range n single-ended or differential input signals up to its 15MHz 36-Pin SSOP Package bandwidth. The 68dB common mode rejection allows APPLICATIONS users to eliminate ground loops and common mode noise by measuring signals differentially from the source. n Telecommunications n Digital Signal Processing The ADC has P compatible,16-bit parallel output port. n Multiplexed Data Acquisition Systems There is no pipeline delay in conversion results. A separate n High Speed Data Acquisition convert start input and a data ready signal (BUSY) ease n Spectrum Analysis connections to FlFOs, DSPs and microprocessors. n Imaging Systems L, LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION 2.2F 10F 5V 10F 5V 10F LTC1604 4096 Point FFT 10 + + 0 3 36 35 10 9 f = 333kHz SAMPLE V AV AV DV DGND REF DD DD DD f = 100kHz IN 20 SHDN 33 SINAD = 89dB THD = 96dB CS 32 40 CONTROL P LOGIC CONVST 31 CONTROL REFCOMP 7.5k AND 4 2.5V RD 30 60 LINES 1.75X TIMING REF + 4.375V BUSY 27 47F 80 OV DD 29 5V OR 3V 100 10F + OGND 28 1 A IN DIFFERENTIAL 120 16-BIT OUTPUT B15 TO B0 ANALOG INPUT 16-BIT SAMPLING BUFFERS 2 A IN PARALLEL 2.5V D15 TO D0 ADC 140 BUS 0 20 40 60 80 100 120 140 160 11 TO 26 FREQUENCY (kHz) AGND AGND AGND AGND V SS 1604 TA01 5 6 7 8 34 1604 TA02 10F + 5V 1604fa 1 AMPLITUDE (dB) + + +LTC1604 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION AV = DV = OV = V (Notes 1, 2) DD DD DD DD TOP VIEW ORDER + Supply Voltage (V ) ..................................................6V DD A 1 36 AV IN DD PART NUMBER A 2 35 AV IN DD Negative Supply Voltage (V ) .................................. 6V SS 3 34 V V REF SS LTC1604CG Total Supply Voltage (V to V ) ............................12V DD SS REFCOMP 4 33 SHDN AGND 5 32 CS LTC1604IG Analog Input Voltage AGND 6 31 CONV LTC1604ACG (Note 3) ..........................(V 0.3V) to (V + 0.3V) SS DD AGND 7 30 RD V Voltage (Note 4) ................... 0.3V to (V + 0.3V) LTC1604AIG AGND 8 29 OV REF DD DD DV 9 28 OGND DD REFCOMP Voltage (Note 4) .......... 0.3V to (V + 0.3V) DD DGND 10 27 BUSY Digital Input Voltage (Note 4) ..................... 0.3V to 10V D15 (MSB) 11 26 D0 D14 12 25 D1 Digital Output Voltage .................. 0.3V to (V + 0.3V) DD 13 24 D13 D2 Power Dissipation .............................................. 500mW D12 14 23 D3 Operating Temperature Range D11 15 22 D4 D10 16 21 D5 LTC1604C ................................................ 0C to 70C D9 17 20 D6 LTC1604I ..............................................40C to 85C D8 18 19 D7 Storage Temperature Range .................. 65C to 150C G PACKAGE 36-LEAD PLASTIC SSOP Lead Temperature (Soldering, 10 sec) ...................300C T = 125C, = 95C/W JMAX JA Consult factory for Military grade parts. CONVERTER CHARACTERISTICS With Internal Reference (Notes 5, 6) LTC1604 LTC1604A PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Resolution (No Missing Codes) l 15 16 16 16 Bits l Integral Linearity Error (Note 7) 1 4 0.5 2 LSB Transition Noise (Note 8) 0.7 0.7 LSB l Offset Error (Note 9) 0.05 0.125 0.05 0.125 % Offset Tempco (Note 9) 0.5 0.5 ppm/C Full-Scale Error Internal Reference 0.125 0.25 0.125 0.25 % External Reference 0.25 0.25 % Full-Scale Tempco I (Reference) = 0, Internal Reference 15 15 ppm/C OUT ANALOG INPUT SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Analog Input Range (Note 2) 4.75 V 5.25V, 5.25 V 4.75V, 2.5 V IN DD SS + V (A , A ) AV SS IN IN DD l I Analog Input Leakage Current CS = High 1 A IN C Analog Input Capacitance Between Conversions 43 pF IN During Conversions 5 pF t Sample-and-Hold Acquisition Time 380 ns ACQ t Sample-and-Hold Acquisition Delay Time 1.5 ns AP t Sample-and-Hold Acquisition Delay Time Jitter 5 ps jitter RMS + CMRR Analog Input Common Mode Rejection Ratio 2.5V < (A = A ) < 2.5V 68 dB IN IN 1604fa 2