S/(N + D) (dB) LTC1410 12-Bit, 1.25Msps Sampling A/D Converter with Shutdown DESCRIPTIO FEATURES n 1.25Msps Sample Rate The LTC 1410 is a 0.65s, 1.25Msps, 12-bit sampling n Power Dissipation: 160mW A/D converter that draws only 160mW from 5V supplies. n 71dB S/(N + D) and 82dB THD at Nyquist This easy-to-use device includes a high dynamic range n No Pipeline Delay sample-and-hold, a precision reference and requires no n Nap (7mW) and Sleep (10W) Shutdown Modes external components. Two digitally selectable power shut- n Operates with Internal 15ppm/C Reference down modes provide flexibility for low power systems. or External Reference The LTC1410s full-scale input range is 2.5V. Maximum n True Differential Inputs Reject Common Mode Noise DC specifications include 1LSB INL and 1LSB DNL over n 20MHz Full Power Bandwidth Sampling temperature. Outstanding AC performance includes 71dB n 2.5V Bipolar Input Range S/(N + D) and 82dB THD at the Nyquist input frequency of n 28-Pin SO Wide Package 625kHz. The unique differential input sample-and-hold can acquire APPLICATI S single-ended or differential input signals up to its 20MHz bandwidth. The 60dB common mode rejection allows n Telecommunications users to eliminate ground loops and common mode noise n Digital Signal Processing by measuring signals differentially from the source. n Multiplexed Data Acquisition Systems n High Speed Data Acquisition The ADC has a P compatible, 12-bit parallel output port. n Spectrum Analysis There is no pipeline delay in the conversion results. A n Imaging Systems separate convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors. , LTC and LT are registered trademarks of Linear Technology Corporation. P CA A L AT TY I L PP IC I Effective Bits and Signal-to-(Noise + Distortion) Complete 1.25MHz, 12-Bit Sampling A/D Converter vs Input Frequency LTC1410 5V DIFFERENTIAL 1 28 12 74 +A AV ANALOG INPUT IN DD 2 27 + 68 (2.5V TO 2.5V) 5V A DV IN DD 0.1F 10F 3 26 10 NYQUIST 2.50V 62 V V REF SS V OUTPUT REF 4 25 0.1F 10F 56 REFCOMP BUSY + 5 24 8 50 0.1F AGND CS 10F 6 23 D11(MSB) CONVST P CONTROL 7 22 6 LINES D10 RD 8 21 D9 SHDN 9 20 4 D8 NAP/SLP 10 19 D7 OGND 11 18 12-BIT 2 D6 D0 PARALLEL 12 17 f = 1.25MHz D5 D1 SAMPLE BUS 13 16 0 D4 D2 1k 10k 100k 1M 10M 14 15 DGND D3 INPUT FREQUENCY (Hz) LTC1410 TA02 1410 TA01 1 EFFECTIVE BITS UO UO ULTC1410 PACKAGE/ORDER I FOR ATIO ABSOLUTEXAI U RATI GS AV = DV = V (Notes 1, 2) DD DD DD TOP VIEW ORDER Supply Voltage (V ) ................................................ 6V DD +A 1 28 AV PART NUMBER IN DD Negative Supply Voltage (V ) ............................... 6V SS A 2 27 DV IN DD Total Supply Voltage (V to V ) .......................... 12V DD SS V 3 26 V REF SS LTC1410CG Analog Input Voltage REFCOMP 4 25 BUSY LTC1410CSW (Note 3) .................................. V 0.3V to V + 0.3V AGND 5 24 CS SS DD LTC1410IG Digital Input Voltage (Note 4) ............ V 0.3V to 10V D11(MSB) 6 23 CONVST SS LTC1410ISW D10 7 22 RD Digital Output Voltage ................... 0.3V to V + 0.3V DD D9 8 21 SHDN Power Dissipation............................................. 500mW D8 9 20 NAP/SLP Operating Temperature Range D7 10 19 OGND LTC1410C .............................................. 0C to 70C D6 11 18 D0 LTC1410I........................................... 40C to 85C D5 12 17 D1 Storage Temperature Range ................ 65C to 150C D4 13 16 D2 Lead Temperature (Soldering, 10 sec)................. 300C DGND 14 15 D3 G PACKAGE SW PACKAGE 28-LEAD PLASTIC SSOP 28-LEAD PLASTIC SO WIDE T = 110C, = 90C/W (SW) JMAX JA T = 110C, = 95C/W (G) JMAX JA Consult factory for Military grade parts. CO VERTER CCHARA TERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. With Internal Reference (Notes 5, 6) A PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution (No Missing Codes) l 12 Bits Integral Linearity Error (Note 7) l 0.3 1 LSB Differential Linearity Error l 0.3 1 LSB Offset Error (Note 8) 2 6 LSB l 8 LSB Full-Scale Error 15 LSB Full-Scale Tempco I = 0 l 15 ppm/C OUT(REF) The l denotes specifications which apply over the full operating temperature range, otherwise A ALOG I PUT specifications are at T = 25C. (Note 5) A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Analog Input Range (Note 9) 4.75V V 5.25V, 5.25V V 4.75V l 2.5 V IN DD SS I Analog Input Leakage Current CS = High l 1 A IN C Analog Input Capacitance Between Conversions 17 pF IN During Conversions 5 pF t Sample-and-Hold Acquisition Time l 50 100 ns ACQ t Sample-and-Hold Aperture Delay Time 1.5 ns AP t Sample-and-Hold Aperture Delay Time Jitter 5 ps jitter RMS CMRR Analog Input Common Mode Rejection Ratio 2.5V < ( A = A ) < 2.5V 60 dB IN IN 2 U U U U WU U W W W