AMC7834 Datasheet, PDF (78/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
8.2 Typical Application
External Temperature
Diodes
ADC BLOCK
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AVSS
IOVDD
GPIO ^IOVDD
DAV /ADC_RDY
ALARMOUT
SLEEP1
SLEEP2
RESET
DACTRIG
SCLK
CS
SDI
SDO
IOVDD
DVDD
0.1 µF
AVCC
0.1 µF
1
DAV/ADC_RDY
2
ALARMOUT
3 _SLEEP1
4 _SLEEP2
5 _RESET
6 _DACTRIG
7
SCLK
8 _CS
9 _SDI
10 _SDO
11 _DGND
12
IOVDD
13 _DVDD
14 _AVCC
GND
0.1 µF
Connect Analog
and Digital GNDs
DAC Outputs
0.1 µF
4.7 µF
AMC7834
Thermal Pad
42
REF_CMP
41
PAVDD
PA_ON ⁴⁰
SENSE1+ ³⁹
SENSE1± ³⁸
SENSE2+ ³⁷
36
SENSE2±
AGND3 ³⁵
SENSE3+ ³⁴
SENSE3± ³³
SENSE4+ ³²
SENSE4± ³¹
VCLAMP1 ³⁰
VCLAMP2 ²⁹
R1
AVDD
10 nF
0.1 µF
R2
AVSS
0.1 µF
AVDD
PA ON
SENSE
Resistor 1
SENSE
Resistor 2
SENSE
Resistor 3
SENSE
Resistor 4
VCLAMP
Settings
R3
R4 SENSE 1+
SENSE 1±
PAVDD
SENSE
resistor 1
Vg1
Vg5 Vg6 Vg7 Vg8 Vg1 Vg2 Vg3 Vg4
Range 1
Range 2
Figure 104. AMC7834 Example Schematic
Example connection using DAC output
(Vg1) and the SENSE1r connection
8.2.1 Design Requirements
The AMC7834 example schematic uses the majority of the design parameters listed in Table 50.
Table 50. Design Parameters
DESIGN PARAMETER
AV_CC
IOV_DD
DV_DD
AV_DD
AV_SS
4 External unipolar inputs
4 High-Side Current Sense
4 bipolar DAC outputs
4 unipolar DAC outputs
Remote temperature sensing
EXAMPLE VALUE
5V
3.3 V
5V
5V
–5 V
ADC[1-4]: 0 to 2.5 V range
Differential input of 0 to 200 mV
–4 to 1 V, –5 to 0 V, and 0 to 5 V
0 to 5 V, 2.5 to 7.5 V
Two remote temperature diode drivers
78
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