AMC7834 Datasheet, PDF (14/93 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
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6.9 Switching Characteristics—DAC Specifications
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These
specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of
the product containing it. AV_DD = DV_DD = 5 V, AV_CC = 5 V, AV_SS = –5 V, IOV_DD = 3.3 V, PAV_DD = 5 V, AGND = DGND = 0 V,
external 2.5 V reference, DAC output range = 0 to 5 V for all DACs, no load on the DACs, current sense inputs common
mode at 48 V, T_A = –40°C to +105°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
DAC OUTPUT CHARACTERISTICS
Output voltage settling
time
Transition: Code 400h to C00h to within ½ LSB.
R_L= 2 kΩ, C_L = 200 pF. All DAC outputs. All output
ranges
10
µs
Slew rate
Transition: Code 400h to C00h, 10% to 90%.
R_L= 2 kΩ, C_L = 200 pF. All DAC outputs. All output
ranges
1.25
V/µs
CLAMP OUTPUT MODE
Clamp shutdown delay⁽¹⁾
All DAC outputs. R_L = ∞, C_L = 200 pF, clamp from 3.5 V
output, within 10% accuracy of active DAC output,
measured from SLEEP 0 to 1 transition
5
µs
Wake-up from clamp
delay ⁽¹⁾
All DAC outputs. R_L = ∞, C_L = 200 pF, wake-up to 3.5 V
output, within 10% accuracy of active DAC output,
measured from SLEEP 1 to 0 transition
5
µs
(1) Not tested during production. Specified by design and characterization.
6.10 Switching Characteristics—ADC, Current and Temperature Sensor Specifications
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These
specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of
the product containing it. AV_DD = DV_DD = 5 V, AV_CC = 5 V, AV_SS = –5 V, IOV_DD = 1.8 to 3.3 V, PAV_DD = 5 V, AGND = DGND =
0 V, external 2.5 V reference, DAC output range = 0 to 5 V for all DACs, no load on the DACs, current sense inputs common
mode at 48 V, T_A = –40°C to +105°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
ADC INTERNAL OSCILLATOR
Internal oscillator frequency
3.7
4
4.3 MHz
EXTERNAL ANALOG INPUTS (ADC1, ADC2, ADC3 and ADC4)
Update time
All four external inputs enabled
Internal monitoring inputs disabled
1
ms
INTERNAL MONITORING INPUTS (BIPOLAR DAC-OUTPUT MONITORING)
Update time
All four internal monitoring inputs enabled
External analog inputs disabled
1
ms
CURRENT-SENSE INPUTS
Update time
All four current sense inputs enabled
CS-FILTER[2:0] = 000
200
µs
TEMPERATURE SENSOR: INTERNAL
Update time
Remote temperature sensors disabled
2
ms
TEMPERATURE SENSOR: EXTERNAL (USING 2N3906 EXTERNAL TRANSISTOR)
Update time
Single external temperature sensor
Internal temperature sensor disabled
RT-SET[2:0] = 000
8
ms
14
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