5 4 3 2 1 REVISION HISTORY ECO - 3.3V LTC5587IDD C8 1uF TP5 OVDD - EXT 1 JP3 OVDD 1 3 3.3V EXT 2 SDO VDD SCK VREF 2 3.3V 3 4 C4 1000PF TP13 GND ISO_7V_UNREG ISO_5V/3.3V_REG IS0_CS/ ISO_SCK/SCL ISO_SDA/MOSI ISO_MISO EE_VCC EE_SDA EE_SCL EE_GND B VCC DATE 4-12-10 D VREG C7 1uF 10 TP4 VREF_EXT EXT C10 (OPT) TP8 EN TP10 VCC 2.7V - 3.6V 9 vcc 8 C18 1uF 0603 C6 1uF C 1 2 RF L1 7 J1 RFIN 1.5nH C2 1000pF C1 1.8pF R1 68 0402 TP11 GND 6 4 7 5 10 V+ 11 R2 4.99K R3 4.99K R4 4.99K 12 8 14 7 6 5 C14 0.01uF 0603 1 U3 VCC A0 WP A1 SCL A2 SDA VSS + C11 10uF 3528 1 2 SDL 1. ALL RESISTORS ARE IN 0603. ALL CAPACITORS ARE IN 0402. 2. INSTALL SHUNTS AS SHOWN. VIN OUT GND SHDN BYP TP14 3.3V 5 4 C12 0.01uF 0603 C13 1uF 0603 VCC C17 10uF 3528 VREG U4 1 2 3 VIN OUT GND SHDN BYP C15 0.01uF 0603 4 LT1761ES5-1.8V CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 3 TP15 VREG 5 C16 1uF 0603 R5 (OPT) 0402 CONTRACT NO. APPROVALS PCB DES. ENG. TECHNOLOGY H.Z. ANDY M. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC 6GHz RMS POWER DETECTOR WITH INTEGRATED 12-BIT SERIAL ADC SIZE N/A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 B LT1761ES5-3.3 SCL A 3 4 0.036 VIA TESTPOINTS NOTE: UNLESS OTHERWISE SPECIFIED 2 3 24LC025-I/ST 3.3V U2 9 + 5 ANDY M. CSQ C3 0.01uF ISO_GND ISO_GND 6 3 8 13 ISO_GND GPIO1 GND APPROVED PRODUCTION TP2 VDD_EXT JP2 VREF 1 C9 100pF TP12 V+ HD2X7-079 VOUT GND J2 EN 3 11 13 CONV 5 OVDD 12 C 1uF CONV VOUT C5 TP9 DESCRIPTION VREG TP3 2 SCK U1 EXT 2 3.3V TP1 SDO 3 JP1 VDD 3 1 D REV DATE: 2 IC NO. REV LTC5587IDD 3 DEMO CIRCUIT 1638A Monday, August 02, 2010 SHEET 1 1 OF 1 A