Datasheet AD9235 (Analog Devices) - 31

AD9235 Data Sheet EXTREF 1V MAX E1 GND AVDD R1 C13 C22 10k
Ω
0.10
µ
F 10
µ
F P9 P8 P11 P7 A B C D R9 C12 GND GND E 10k
Ω
0.1
µ
F AVDD H1 P10 1 GND MTHOLE6 P6 GND GND R5 1 2 3 4 5 6 H2 1k
Ω
MTHOLE6 MODE P2 C29 2 2 H3 C9 C11 P1 10
µ
F P5 MTHOLE6 C8 0.10
µ
F + 0.1
µ
F R7 0.1
µ
F GND VDL GND 1k
Ω
AVDD VAMP H4 DRVDD MTHOLE6 GND 3 C7 P3 GND 3.0V 2.5V 2.5V 5.0V 0.1
µ
F R6 1k
Ω
OVERRANGE BIT GND (MSB) GND 4 P4 1 16 24 23 22 21 20 19 18 17 DRX 2 15 D13X D9 D8 3 14 C6 R42 D11 D12X OTR D10 4 13 0.1
µ
F VREF 0
Ω
D11X SENSE MODE 5 12 D10X 6 11 AVDD 25 REFB DRVDD 16 D9X DRVDD 7 10 AMPIN GND D8X 26 REFT DGND 15 R36 R26 8 9 GND D7X 1k
Ω
1k
Ω
AVDD 27 AVDD D7 14 RP2 220
Ω
GND 28 AGND AD9235 D6 13 XOUT VIN+ U4 29 VIN+ D5 12 R12 R4 C21 VIN– T1 30 VIN– D4 11 0
Ω
33k
Ω
10pF 1 16 C15 ADT 1–1 WT R10 D6X GND 31 AGND D3 10 2 15 J1 0.1
µ
F D5X XFRIN1 36
Ω
C26 3 14 1 6 GND AVDD 32 AVDD D2 9 D4X 10pF N 4 13 E 45 L1 5 2 CT D3X NC W 5 12 R2 10nH D2X 3 4 (LSB) 6 11 XX C16 DNC CLK DNC PD DNC DNC D0 D1 D1X AMP 7 10 C5 GND PRI SEC 0.1
µ
F C19 OR L1 1 2 3 4 5 6 7 8 D0X 8 9 0.1
µ
F 15pF FOR FILTER GND GND GND RP1 220
Ω
CLK GND R11 OPTIONAL XFR R3 R8 36
Ω
T2 0
Ω
GND 1k
Ω
C23 FT C1–1–13 XOUTB P14 10pF 1 5 X FRIN X AMPINB P13 OUT AVDD 2 R15 GND CT 33
Ω
3 4 XOUTB C18 PRI SEC 0.1
µ
F AVDD SENSE PIN SOLDERABLE JUMPER R13 R25 GND E TO A EXTERNAL VOLTAGE DIVIDER 1k
Ω
1k
Ω
GND R18 R SINGLE ENDED E TO B INTERNAL 1V REFERENCE (DEFAULT) 25
Ω
R3, R17, R18 E TO C EXTERNAL REFERENCE ONLY ONE SHOULD BE E TO D INTERNAL 0.5V REFERENCE ON BOARD AT A TIME GND MODE PIN SOLDERABLE JUMPER 5 TO 1 TWOS COMPLEMENT/DCS OFF 5 TO 2 TWOS COMPLEMENT/DCS OFF 5 TO 3 OFFSET BINARY/DCS ON 5 TO 4 OFFSET BINARY/DCS OFF
02461-054 Figure 54. LFCSP Evaluation Board Schematic, Analog Inputs and DUT Rev. D | Page 30 of 40 Document Outline Specifications DC Specifications Digital Specifications Switching Specifications AC Specifications Absolute Maximum Ratings Explanation of Test Levels ESD Caution Pin Configurations and Function Descriptions Definitions of Specifications Equivalent Circuits Typical Performance Characteristics Applying the AD9235 Theory of Operation Analog Input Differential Input Configurations Single-Ended Input Configuration Clock Input Considerations Power Dissipation and Standby Mode Digital Outputs Timing Voltage Reference Internal Reference Connection External Reference Operation Operational Mode Selection TSSOP Evaluation Board LFCSP Evaluation Board Outline Dimensions Ordering Guide