AMC7834 Datasheet, PDF (5/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

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AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
PIN
NAME
ADC1
ADC2
ADC3
ADC4
AGND1
AGND2
AGND3
AGND4
ALARMOUT
AUXDAC1
AUXDAC2
AUXDAC3
AUXDAC4
AV_CC
AV_DD1
AV_DD2
AV_SS
CS
D1+
D1–
D2+
D2–
DAC1
DAC2
DAC3
DAC4
DACTRIG
DAV/ADC_RDY
DGND
DV_DD
GPIO1
GPIO2
GPIO3
GPIO4
Pin Functions
TYPE
NO.
DESCRIPTION
48
I
47
I
Analog inputs channels. These channels are used for general monitoring. The input range
46
I
of these pins is 0 to V_ref.
45
I
17
—
Analog ground. These pins are the ground reference point for all analog circuitry on the
22
— _{device. Connect the AGND1, AGND2, AGND3, and AGND4 pins to the same potential}
35
— ^{(AGND). Ideally, the analog and digital grounds should be at the same potential (GND) and}
must not differ by more than ±0.3 V.
43
—
ALARMOUT is an open drain global alarm output. An external 10 kΩ pullup resistor to a
2
O voltage no higher than AV_DD is required. The ALARMOUT output polarity is defined through
the ALARMOUT-POLARITY bit in register 0x1B. The default polarity is active low.
15
O
16
O
Auxiliary DAC Outputs. The power-on-reset and clamp voltage for these DACs is always
18
O
AGND.
19
O
14
— Positive analog power supply for the auxiliary DACs.
26
—
Analog supply voltage (4.5 V to 5.5 V). Connect the AV_DD1 and AV_DD2 pins to the same
44
—
potential (AV_DD). These pins must have the same value as the DV_DD pin.
Lowest potential in the system. This pin is typically tied to a negative supply voltage. If all
25
— the bipolar DACs are set to operate in positive output ranges can be connected to the
analog ground.
8
I
Active low serial data enable. This input is the frame synchronization signal for the serial
data. When this signal goes low, it enables the serial interface input shift register.
52
I
Remote temperature sensor D1. This pin is a positive input when D1 is enabled. This pin
can be left unconnected if unused.
51
I
Remote temperature sensor D1. This pin is a negative input when D1 is enabled. This pin
can be left unconnected if unused. Pins D1– and D2– are internally shorted.
50
I
Remote temperature sensor D2. This pin is a positive input when D2 is enabled. This pin
can be left unconnected if unused.
49
I
Remote temperature sensor D2. This pin is a negative input when D2 is enabled. This pin
can be left unconnected if unused. Pins D1– and D2– are internally shorted.
23
O
Bipolar DAC outputs 1 and 2. These DACs share the same range and clamp voltage.
24
O
27
O
Bipolar DAC outputs 3 and 4. These DACs share the same range and clamp voltage.
28
O
DAC trigger active low control input. When the DACTRIG pin is low, the contents of the
6
I
DAC data registers are transferred to the DAC active registers. The DAC outputs update
only after the DAC active registers have been loaded. This pin is only operational in open
loop current sensing mode.
The DAV/ADC_RDY pin is in high-impedance mode by default and must be enabled
through the DAVPIN-EN bit in register 0x11 to access the DAV or ADC_RDY functionality.
1
O
DAV is an active low ADC synchronization signal. A 20 µs pulse (active low) on this pin is
used to indicate the end of a conversion sequence. Alternatively the pin can be set to
operate as ADC_RDY through the DAVPIN-SEL bit in register 0x11. ADC_RDY is an active
high synchronization signal used to indicate when the ADC is in the READY state.
Digital ground. This pin is the ground reference point for all digital circuitry on the device.
11
— Ideally, the analog and digital grounds should be at the same potential (GND) and must not
differ by more than ±0.3 V.
13
— Digital supply voltage (4.5 V to 5.5 V). This pin must be the same value as the AV_DD pins.
56
I/O
55
I/O ^{General-purpose digital I/Os. These pins are bidirectional open-drain, digital I/Os and}
54
I/O
requires an external 10 kΩ pullup resistor to a voltage no higher than AV_DD. If unused, the
GPIO pins should be connected to ground.
53
I/O
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