AMC7812SPAPR Datasheet, PDF (5/92 Pages) Texas Instruments – 12-Bit Analog Monitoring and Control Solution with Multichannel ADC, DACs, and Temperature Sensors

AMC7812
www.ti.com
SBAS513E – JANUARY 2011 – REVISED SEPTEMBER 2013
ELECTRICAL CHARACTERISTICS (continued)
At T_A = –40°C to +105°C, AV_DD = DV_DD = 4.5V to 5.5V, AV_CC = +15V, AGND = DGND = 0V, IOV_DD = 2.7V to 5.5V, internal
2.5V reference, and the DAC output span = 0V to 5V, unless otherwise noted.
AMC7812
PARAMETER
TEST CONDITIONS
MIN TYP
MAX UNIT
ADC REFERENCE INPUT
Reference input voltage range
Input current
V_REF = 2.5V
INTERNAL ADC REFERENCE BUFFER
1.2
145
AV_DD
V
µA
Offset
T_A = +25°C
INTERNAL TEMPERATURE SENSOR
±5 mV
Operating range
–40
+125 °C
Accuracy
Resolution
AV_DD = 5V, T_A = –40°C to +125°C
AV_DD = 5V, T_A = 0°C to +100°C
Per LSB
±1.25
0.125
±2.5 °C
±1.5 °C
°C
Conversion rate
External temperature sensors are disabled
15
ms
EXTERNAL TEMPERATURE SENSOR (Using 2N3906 external transistor)
Operating range
Limited by external diode
–40
+150 °C
Accuracy ^{(6) (7)}
Resolution
AV_DD = 5V, T_A = 0°C to +100°C,
T_D = –40°C to +150°C
AV_DD = 5V, T_A = –40°C to +100°C,
T_D = –40°C to +150°C
Per LSB
0.125
±1.5 °C
±2 °C
°C
Conversion rate per sensor
With resistance cancellation
(RC bit = '1')
Without resistance cancellation
(RC bit = '0')
DIGITAL LOGIC: GPIO⁽⁸⁾⁽⁹⁾ and ALARM
72
93
33
44
100 ms
47 ms
V_IH
Input high voltage
V_IL
Input low voltage
V_OL
Output low voltage
High-impedance leakage
IOV_DD = +5V
IOV_DD = +3.3V
IOV_DD = +5V
IOV_DD = +3.3V
IOV_DD = +5V, sinking 5mA
IOV_DD = +3.3V, sinking 2mA
2.1
2.1
–0.3
0.3 + IOV_DD
V
0.3 + IOV_DD
V
0.8 V
–0.3
0.8 V
0.4 V
0.4 V
5 µA
High-impedance output capacitance
10 pF
(6) T_D is the external diode temperature.
(7) Auto conversion mode disabled
(8) For pins GPIO0-3, the external pull up resistor must be connected to a voltage less than or equal to 5.5V.
(9) For pins GPIO4-7, the external pull up resistor must be connected to a voltage less than or equal to AV_DD.
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