AMC7834 Datasheet, PDF (11/93 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
6.6 Electrical 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
EXTERNAL ANALOG INPUTS (ADC1, ADC2, ADC3 and ADC4)
Resolution
12
Bits
INL Integral nonlinearity
±0.5
±1 LSB
DNL Differential nonlinearity
Specified monotonic
±0.5
±1 LSB
Offset error
±0.3
±4.5 LSB
Offset error match
±1
LSB
Gain error
±0.3
±4 LSB
Gain error match
Full-scale input range⁽¹⁾
Input capacitance
±1
LSB
0
V_ref
V
48
pF
DC-input leakage current Unselected ADC input
±2
µA
INTERNAL MONITORING INPUTS (BIPOLAR DAC-OUTPUT MONITORING)
Full scale input range⁽¹⁾
–5
2.5
V
Resolution
LSB size
1.83
mV
CURRENT-SENSE INPUTS
Common mode voltage
Full scale sense voltage⁽¹⁾ SENSEn+ – SENSEn-
4
60
V
0
200 mV
Input resistance
Per current sense input terminal
192
kΩ
Gain accuracy
±0.1%
±1%
Input offset error
CS-FILTER[2:0] = 100
Common mode voltage = 4 V
±50
±500
µV
CMRR
CS-FILTER[2:0] = 100
80
dB
Resolution
LSB size
48.83
µV
TEMPERATURE SENSOR: INTERNAL
Operating range⁽¹⁾⁽²⁾
Specified monotonic over entire range.
Accuracy ⁽²⁾
T_J = –40°C to 125°C
Resolution
LSB size
T_J = –40°C to 125°C
TEMPERATURE SENSOR: EXTERNAL (USING 2N3906 EXTERNAL TRANSISTOR)
Operating range⁽¹⁾⁽²⁾
–55
0.25
–55
125
°C
±3
°C
°C
150
°C
Accuracy ⁽²⁾
Resolution
RT-SET[2:0] = 011, CS-FILTER[2:0] = 100
T_A = –40°C to 125°C, T_(DIODE) = –40°C to 150°C
LSB size
T_A = –40°C to 125°C, T_(DIODE) = –40°C to 150°C
±3
°C
0.25
°C
(1) Input range for all monitoring inputs must be met for accuracy specifications to apply.
(2) Not tested during production. Specified by design and characterization.
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