DC2126A - Schematic

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
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