AMC7820 Datasheet, PDF (15/28 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL

RR
DAC1
(12 Bits)
RR
DAC2
(12 Bits)
SCLK ³⁷
38
MOSI
39
MISO
40
SS
36
RESET
19
AV_DD
18
AGND
42
DV_DD
43
DGND
41
BV_DD
Reference
(2.5V)
ADC
(12 Bits)
Clock
MUX
CTL
DAC0
(12 Bits)
SW2_DISABLE
R
R
Current Mirror
1:4
OPA8
SOFT_START_CTR = “1”
After Reset
NOTE: After power-on or reset,
SW1 and SW2 are disabled, SW3
is positioned to Bip, SW4 is on,
and the voltage on pin 47 equals
2.5V (V_REF) if OPA7 is connected
as an integrator.
“1” = Disable
SW1_DISABLE
21 _{DAC1_OUT_SET}
22 _{DAC1_OUT}
EN
DIS _SW1
OPA1
OPA2
OPA3
20
DAC2_OUT_SET
17
DAC2_OUT
28
SW1_OUT
29
OPA1_IN+
30 _{OPA1_OUT}
31
OPA1_IN–
10 _{OPA2_IN+}
9 _{OPA2_OUT}
8 _{OPA2_IN–}
25
OPA3_IN+
24
OPA3_OUT
23
OPA3_IN–
0
1
2
3
4
MUX ₅
6
7
OPA4
OPA5
OPA6
“1” = SW2 Disable
Unipolar_Bipolar_CTR
2.5V
OPA7
EN
DIS
SW2
Bip
Uni
SW3
27
EXT_REF_IN
26
REF_OUT_+2.5V
15
OPA4_OUT
14
OPA4_IN–
16
OPA4_IN+
35
CH2
34
CH3
33
CH4
32 _CH5
12 _{OPA5_OUT}
11 _{OPA5_IN–}
13
OPA5_IN+
4 _{OPA6_OUT}
3 _{OPA6_IN–}
5
OPA6_IN+
7
DAC0_OUT_SET
6 _{DAC0_OUT}
48 _{OPA7_IN+}
47 _{OPA7_OUT}
1 _{SW2_OUT}
46
OPA7_IN–
ON
OFF
SW4
TEC
Soft-Start
Controller
SOFT_START_ENABLE
OPA9
2
T_SENSOR_VOLTAGE
44 _{THERM_I_OUTPUT}
45
ISET_RESISTOR
FIGURE 2. AMC7820 Block Diagram.
AMC7820
15
SBAS231B
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