LTC2392CUK-16#TRPBF Linear Technology, LTC2392CUK-16#TRPBF Datasheet

Page 1

... The LTC2392-16 dissipates only 110mW at 500ksps, while both nap and sleep power-down modes are provided to further reduce power during inactive periods. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners 1. 10µ ...

Page 2

... PLASTIC QFN T = 125°C, θ = 29°C/W JMAX JA EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB orDer inFormation LEAD FREE FINISH TAPE AND REEL LTC2392CUK-16#PBF LTC2392CUK-16#TRPBF LTC2392IUK-16#PBF LTC2392IUK-16#TRPBF LEAD FREE FINISH TRAY LTC2392CLX-16#PBF LTC2392CLX-16#PBF LTC2392ILX-16#PBF LTC2392ILX-16#PBF LTC2392HLX-16#PBF LTC2392HLX-16#PBF Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. ...

Page 3

The denotes the specifications which apply over the full operating temperature range, otherwise l specifications are 25°C. (Note 4) A SYMBOL PARAMETER + + V Absolute Input Range ( – – V Absolute ...

Page 4

LTC2392-16 internal reFerence characteristics operating temperature range, otherwise specifications are at T PARAMETER V Output Voltage REF V Output Tempco REF V Output Impedance REF External Reference Voltage REFIN Input Impedance V Line Regulation REF VCM Output Voltage Digital inputs ...

Page 5

T A SYMBOL PARAMETER f Sampling Frequency SMPL t Conversion Time CONV t Acquisition Time ACQ t CNVST Low Time 4 t CNVST High Time 5 t CNVST↓ to BUSY Delay 6 t ...

Page 6

LTC2392-16 typical perFormance characteristics Integral Nonlinearity vs Output Code 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 32768 0 16384 49152 65536 OUTPUT CODE 239216 G01 DC Histogram (Internal Reference) 2000000 1800000 1600000 1400000 1200000 1000000 800000 600000 400000 ...

Page 7

SNR, SINAD vs Input Frequency 96 SNR 94 92 SINAD 100 125 150 175 INPUT FREQUENCY (kHz) 239216 G10 THD, Harmonics 20kHz IN vs ...

Page 8

LTC2392-16 pin Functions GND (Pins 20, 35, 41, 44, 48, Exposed Pad Pin 49): Ground. All GND pins must be connected to a solid ground plane. Exposed pad must be soldered directly to the ground plane. AVP ...

Page 9

Functions D15 (Pin 28): Data Bit 15. When SER/PAR = 0 this pin is Bit 15 of the parallel port data output bus. The data format is determined by the logic level of OB/2C. BUSY (Pin 29): Busy Output. ...

Page 10

LTC2392-16 Functional block Diagram LTC2392- – IN REFIN REFOUT VCM timing Diagrams CS CNVST BUSY D[15:0] CS CNVST BUSY SCLK SDOUT 0 AVP DVP OVP 16-BIT SAMPLING ADC 16-BIT 1x BUFFER 4.096V ...

Page 11

OVERVIEW The LTC2392- low noise, high speed 16-bit suc- cessive approximation register (SAR) ADC. Operating from a single 5V supply, the LTC2392-16 supports a large ±4.096V fully differential input range, making it ideal for high performance ...

Page 12

LTC2392-16 applications inFormation INPUT DRIVE CIRCUITS A low impedance source can directly drive the high imped- ance inputs of the LTC2392-16 without gain error. A high impedance source should be buffered to minimize settling time during acquisition and to optimize ...

Page 13

Internal Reference To use the internal reference, simply tie the REFOUT and REFIN pins together. This connects the 4.096V output of the internal reference to the input of the internal reference buffer. The output impedance of the internal ...

Page 14

LTC2392-16 applications inFormation Signal-to-Noise Ratio (SNR) The signal-to-noise ratio (SNR) is the ratio between the RMS amplitude of the fundamental input frequency and the RMS amplitude of all other frequency components except the first five harmonics and DC. Figure 5 ...

Page 15

The data from that conversion can be read after PD = low is applied. In this mode power consumption drops to a typical value of 175µW from 110mW. This ...

Page 16

LTC2392-16 applications inFormation Parallel Modes The parallel output data interface is active when the SER/PAR pin is tied low and when both CS and RD are low. The output data can be read as a 16-bit word as shown in ...

Page 17

CS RD BUSY DATA BUS D[15:0] CNVST, RD BUSY DATA BUS D[15:0] Figure 10. Read the Parallel Data During the Conversion CS, RD BYTESWAP Hi-Z D[15:8] Figure 11. 8-Bit Parallel Interface Using the BYTESWAP Pin Hi-Z Hi-Z CURRENT ...

Page 18

LTC2392-16 applications inFormation BUSY SCLK Hi-Z SDOUT (ADC 2) SDIN (ADC BUSY SCLK SDOUT Hi-Z (ADC 2) SDIN (ADC 2) CNVST IN SCLK IN Figure 12. Serial Interface with ...

Page 19

RESET CVNST DATA BUS D[15: ACQ Hi-Z Figure 13. RESET Pin Timing LTC2392-16 239216 F13 239216f  ...

Page 20

LTC2392-16 applications inFormation BOARD LAYOUT To obtain the best performance from the LTC2392-16, a printed circuit board (PCB) is recommended. Layout for the printed circuit board should ensure the digital and analog signal lines are separated as much as possible. ...

Page 21

Partial Layer 1 Component Side Partial Top Silkscreen Partial Layer 2 Ground Plane LTC2392-16 239216f  ...

Page 22

LTC2392-16 package Description 5.15 0.05 5.15 0.05 0.25 0.05 0.50 BSC RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED 7.00 0.10 (4 SIDES) PIN 1 TOP MARK (SEE NOTE 6) NOTE: 1. DRAWING ...

Page 23

... SHALL NOT EXCEED 0.25mm ON ANY SIDE, IF PRESENT Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 24

... Low Noise Voltage: 0.95nV/√Hz (100kHz), Low Distortion: –80dB at 1MHz, TSOT23-6 Package Rail-to-Rail Input and Outputs, 240ns 0.01% Settling Time www.linear.com ● 5V – 2200pF LTC2392- 239216 TA03 Noise (0.1Hz to 10Hz) in MSOP-8 Package P-P , Settling Time: 900ns P-P LT 0210 • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2010 239216f ...