SIGNAL/(NOISE + DISTORTION) (dB) LTC1416 Low Power 14-Bit, 400ksps Sampling ADC FEATURES DESCRIPTIO n Sample Rate: 400ksps The LTC 1416 is a 2.2m s, 400ksps, 14-bit sampling A/D n converter that draws only 70mW from 5V supplies. This Power Dissipation: 70mW n easy-to-use device includes a high dynamic range sample- Guaranteed 1.5LSB DNL, 2LSB INL (Max) and-hold and a precision reference. Two digitally select- n 80.5dB S/(N + D) and 93dB THD at 100kHz able power shutdown modes provide flexibility for low n 80dB S/(N + D) and 90dB THD at Nyquist power systems. n Nap and Sleep Shutdown Modes n Operates with Internal or External Reference The LTC1416s full-scale input range is 2.5V. Maximum n True Differential Inputs Reject Common Mode Noise DC specifications include 2LSB INL, 1.5LSB DNL over n 15MHz Full Power Bandwidth Sampling temperature. Outstanding AC performance includes 80.5dB n 2.5V Bipolar Input Range S/(N + D) and 93dB THD with a 100kHz input, and 80dB n 28-Pin SSOP Package S/(N + D) and 90dB THD at the Nyquist input frequency of 200kHz. U APPLICATIO S The unique differential input sample-and-hold can ac- quire single-ended or differential input signals up to its n Telecommunications 15MHz bandwidth. The 60dB common mode rejection n Digital Signal Processing allows users to eliminate ground loops and common n Multiplexed Data Acquisition Systems mode noise by measuring signals differentially from the n High Speed Data Acquisition source. n Spectrum Analysis n The ADC has a m P compatible, 14-bit parallel output Imaging Systems port. There is no pipeline delay in the conversion , LTC and LT are registered trademarks of Linear Technology Corporation. results. A separate convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors. TYPICAL APPLICATIO Effective Bits and Signal-to-(Noise + Distortion) Complete, 70mW, 14-Bit ADC with 80.5dB S/(N + D) vs Input Frequency 14 86 DV 10F AV DD DD 13 80 12 74 LTC1416 NYQUIST 11 68 14 FREQUENCY + A 10 62 IN D13 (MSB) OUTPUT 14-BIT ADC S/H 9 BUFFERS D0 (LSB) 8 A IN 7 REFCOMP 6 BUFFER BUSY 22F 5 TIMING CS 4 4k AND CONVST 2.5V 3 V REF LOGIC RD REFERENCE 1F 2 SHDN f = 400kHz 1 SAMPLE V 0 SS AGND DGND 1416 TA01 1k 10k 100k 1M 2M INPUT FREQUENCY (Hz) 10F 5V 1416 TA02 1 EFFECTIVE BITS U ULTC1416 PACKAGE/ORDER I FOR ATIO ABSOLUTEXAI U RATI GS AV = DV = V (Notes 1, 2) DD DD DD ORDER TOP VIEW Supply Voltage (V ) ................................................ 6V DD PART NUMBER + A 1 28 AV IN DD Negative Supply Voltage (V ) ............................... 6V SS A 2 27 DV IN DD Total Supply Voltage (V to V ) .......................... 12V LTC1416CG DD SS V 3 26 V REF SS Analog Input Voltage LTC1416IG REFCOMP 4 25 BUSY (Note 3) ......................... (V 0.3V) to (V + 0.3V) SS DD AGND 5 24 CS Digital Input Voltage (Note 4) ..........(V 0.3V) to 10V SS D13(MSB) 6 23 CONVST Digital Output Voltage ....... (V 0.3V) to (V + 0.3V) SS DD D12 7 22 RD Power Dissipation............................................. 500mW D11 8 21 SHDN Operating Temperature Range D10 9 20 D0 Commercial ............................................ 0 C to 70 C D9 10 19 D1 D8 11 Industrial ........................................... 40 C to 85 C 18 D2 D7 12 17 D3 Storage Temperature Range ................ 65 C to 150 C D6 13 16 D4 Lead Temperature (Soldering, 10 sec)................. 300 C DGND 14 15 D5 G PACKAGE 28-LEAD PLASTIC SSOP T = 110 C, q = 95 C/W JMAX JA Consult factory for Military grade parts and for A grade parts. CO VERTER CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. With Internal Reference (Notes 5, 6) A PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution (No Missing Codes) l 13 Bits Integral Linearity Error (Note 7) l 0.8 2 LSB Differential Linearity Error l 0.7 1.5 LSB Offset Error (Note 8) l 5 20 LSB Full-Scale Error Internal Reference 20 60 LSB External Reference = 2.5V 10 40 LSB Full-Scale Tempco I = 0 15 ppm/ C OUT(REF) A ALOG I PUT The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. (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 m A IN C Analog Input Capacitance Between Conversions 15 pF IN During Conversions 5 pF t Sample-and-Hold Acquisition Time (Note 9) l 100 400 ns ACQ t Sample-and-Hold Aperture Delay Time 1.5 ns AP t Sample-and-Hold Aperture Delay Time Jitter 2 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