5 4 3 2 1 REVISION HISTORY ECO REV - 4 DESCRIPTION APPROVED PRODUCTION JON M. DATE 01-27-16 J1 D D HDR_5x2_FTSH IPCS_SSn IPCS_SCK IPCS_MISO VSUP UARTC0_TX M1 LTP5901-IPM 280-0443 FLASH_P_ENn IPCS_MOSI RESETn UARTC0_RX RESETn LTP5901 turns LDO on/off. This duty-cycles power to the temp sensor. LDO_EN R5 VSUP GND VDDPA NC LNA_EN RADIO_TX RADIO_TXn AI_2 AI_1 AI_3 AI_0 GND OSC_32K_XOUT NC NC RESETn TDI TDO TMS TCK GND DP4 VDDA VCORE VOSC DP3 DP2 SLEEPn DP0 NC GND R1 100k 100-2396 TP1 R4 100k 100-2396 R25 VSUP 0 100-0215 VOUT 3.6V Vout from LTC3330 C FLASH_P_ENn R23 34 100-0363 R22 34 100-0363 IPCS_SSn R21 34 CSB_2484 LTP5901 output to enable/disable LTC2484 SPI SCK LTP5901 output to clock LTC2484 SPI SDO LTP5901 input to read LTC2484 SPI output 100-0363 B IPCS_MISO UARTC0_TX B UARTC0_RX 31 32 33 100k 100-2396 GND NC RADIO_INHIBIT TIMEn UART_TX UART_TX_CTSn UART_TX_RTSn UART_RX UART_RX_CTSn UART_RX_RTSn GND VSUPPLY VPRIME NC NC FLASH_P_ENn SPIS_SSn SPIS_SCK SPIS_MOSI SPIS_MISO PWM0 DP1 SPIM_SS_0n SPIM_SS_1n GND SPIM_SCK SPIM_MOSI IPCS_SSn SPIM_MISO GND 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 IPCS_SCK C1 0.1uF 6.3V R3 1.1Meg 100-0361 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 GND IPCS_MOSI IPCS_SCK C PWR STS IPCS_MOSI LTP5901 ADC reads whether solar or battery is used > 0.5V --> solar < 0.1V --> battery 2 4 6 8 10 34 35 36 3.3Meg 1 3 5 7 9 E1 UARTC0_TX UARTC0_RX IPCS_MISO R2 BAT_ON 0V-6V max 250-0347 NOTES: UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE ±1%, 0402 ALL CAPACITORS ARE ±10%, 50V, 0402 CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY A.K. TITLE: SCHEMATIC JON M. HIGH ACCURANCY WARELESS TEMP SENSOR WITH SOLAR BATTERY LIFE EXTENDER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only N/A SCALE = NONE DATE: 2 IC NO. LTP5901-IPM, LTC3330EUH, LTC2484CDD, LTC6654AHS6-2.5 DEMO CIRCUIT 2126A Wednesday, January 27, 2016 SHEET 1 1 REV. 4 OF 3 A 5 4 3 2 sets VOUT to 3.6V VIN3 D 8 R27 0 9 100-0215 10 DPDT switch disconnects solar and battery C20 C19 C18 C17 C16 C15 C14 C3 100uF 100uF 100uF 100uF 100uF 100uF 100uF 100uF SW1 DPDT Out1_1 C SOLAR_IN 2 Mid1 Out1_2 7 Out2_1 7 1 920-0046 8 BAT1 TL-4935 8 5 Mid2 1 1210 1210 1210 1210 1210 1210 1210 1210 16V 16V 16V 16V 16V 16V 16V 16V 3 4 C4 4.7uF 0603 6.3V C6 6 1206 Out2_2 430-0060 C2 1uF 11 6.3V VIN2 3 D 18 IPK1 19 IPK2 24 L0 23 L1 30 22 L2 OUT2 D2- OUT0 D2+ D1- 31 D1+ sets LDO_OUT to 3.0V VOUT VIN3 OUT1 D2 SC2055I 925-0001 32 D1 SC2055I 925-0001 1 AC1 IPK0 AC2 UV3 VIN UV2 CAP UV1 VIN2 UV0 VIN3 SWA BAT SWB C5 1uF VIN3 26 6.3V 22uF 16 6.3V 25 BAT 29 LDO_EN SW BAT_ON VOUT 17 logic input, comes from LTP5901 output logic high (Vout) turns LDO on logic low (gnd) turns LDO off LDO powers reference and thermistor B ???? 5 BAT_ON goes to LTP5901 ADC to detect whether solar or battery is used A R14 NoStuff 6 7 L1 15 C 200-0148 22uH 14 E4 L2 12 200-0149 22uH 13 VOUT 3.6V powers LTP5901 and LTC2484 C7 100uF 1210 6.3V CUSTOMER NOTICE LDO_IN 21 SCAP 2 BAL LDO_OUT 3.0V powers LT6654 C8 4.7uF 1206 6.3V 150-0422 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 R12 0 E3 TECHNOLOGY A.K. 3 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 JON M. HIGH ACCURANCY WARELESS TEMP SENSOR WITH SOLAR BATTERY LIFE EXTENDER SIZE 5 R28 NoStuff B BAT_ON 0V-6V max NOTES: UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE ±1%, 0402 ALL CAPACITORS ARE ±10%, 50V, 0402 LDO_OUT 280-0440 1 U1 LTC3330EUH 20 R24 3.3Meg PGVOUT 1K 100-2456 28 R16 PGLDO LDO_EN R13 0 150-3207 GND 27 2 3 33 E2 VIN2 R29 NoStuff 4 I + E9 R15 0 N/A SCALE = NONE DATE: 2 IC NO. LTP5901-IPM, LTC3330EUH, LTC2484CDD, LTC6654AHS6-2.5 DEMO CIRCUIT 2126A Wednesday, January 27, 2016 SHEET 2 1 REV. 4 OF 3 A 5 4 3 2 1 D D 3.0V R26 REFVCC LDO_OUT U2 LT6654AHS6-2.5 DNC 4 DNC GND GND TP3 3 Vin 6 VREF E5 VREF 2.5V 2 1 0 Vout 5 TP2 R17 SHORT CONNECTION BETWEEN ADC VREF AND R18 C10 .1uF 6.3V C11 1uF 0603 6.3V R18 50k 0603 C 1 7 9 6 SCK CSB_2484 SDI SDO SCK CSB U3 LTC2484CDD Vin+ fo GND GND SDO Vcc Vref 2 3 10 C VDD C9 1uF 0603 6.3V 10 11 8 3.6V VOUT Vin- C12 0603 4 5 0603 C13 .1uF 6.3V .1uF 6.3V E6 VIN+ R19 KS502J2 R20 50k 0603 SHORT 'STAR' GND BETWEEN ADC AND R20 E7 E8 VIN- GND B B CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY A.K. TITLE: SCHEMATIC JON M. HIGH ACCURANCY WARELESS TEMP SENSOR WITH SOLAR BATTERY LIFE EXTENDER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only N/A SCALE = NONE DATE: 2 IC NO. LTP5901-IPM, LTC3330EUH, LTC2484CDD, LTC6654AHS6-2.5 DEMO CIRCUIT 2126A Wednesday, January 27, 2016 SHEET 3 1 REV. 4 OF 3 A