AMC7823 Datasheet, PDF (4/48 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL CIRCUIT

AMC7823
SLAS453A – APRIL 2005 – REVISED OCTOBER 2005
www.ti.com
ELECTRICAL CHARACTERISTICS: +5 V (continued)
At –40°C to +85°C, AV_DD = 5 V, DV_DD = 5 V, BV_DD = 3 V to 5 V, using external 2.5-V reference (unless otherwise noted).
AMC7823
PARAMETER
CONDITIONS
MIN TYP
MAX UNITS
PRECISION CURRENT SOURCE
Output current range
0.01
10 mA
Output current accuracy
Output current drift
Output impedance
Compliance voltage of pin
PRECISION_I_OUTPUT
I_out = 100 µA
I_out = 100 µA
I_out = 100 µA
I_out = 10 mA
99.5 100.0
40
100
3 4.25
100.5
µA
ppm/°C
MΩ
V
Power-supply rejection ratio
60
dB
VOLTAGE REFERENCE (V_REF)
Internal reference voltage⁽⁴⁾
At 25°C
2.495 2.50
2.505
V
Internal reference drift
–40°C to 85°C
±15
ppm/°C
Output impedance of pin EXT_REF_IN
as internal reference output
10
kΩ
Short-circuit current
250
µA
External reference voltage
1.20
2.55
V
External reference input resistance
Internal reference selected
Internal reference de-selected
10
kΩ
1
MΩ
External reference input capacitance
5
pF
TEMPERATURE SENSOR
Temperature range
–40
85
°C
Resolution
Accuracy
LEVEL OF PIN GALR AND DAV
V_REF = 2.5 V
V_REF = 1.25 V
V_REF = 2.5 V
V_REF = 1.25 V
3.2
°C
1.6
°C
±4
°C
±2.0
°C
I_OH = 0.7 mA
I_OL = 180 µA
DIGITAL INPUT/OUTPUT, EXCEPT PIN GALR AND DAV
4
DV_DD
V
0
0.4
V
V_IH
V_{IL Logic level}
V_OH
V_OL
V_IH
V_{IL Logic level}
V_OH
V_IL
Input capacitance
BV_DD = 5 V, I_IH = 5 µA
BV_DD = 5 V, I_IL = –5 µA
BV_DD = 5 V, I_OH = –3 mA
BV_DD = 5 V, _OL = 3 mA
BV_DD = 3 V, I_IH = 5 µA
BV_DD = 3 V, I_IL = –5 µA
BV_DD = 3 V, I_OH = –3 mA
BV_DD = 3 V, I_OL = 3 mA
3.5
BV_DD + 0.3
V
0
0.8
V
4
BV_DD
V
0
0.4
V
2.1
BV_DD + 0.3
V
0
0.6
V
2.4
BV_DD
V
0
0.4
V
5
pF
(4) Bit GREF in AMC Status/Configuration Register determines the internal reference voltage. The internal V_REF = 2.5 V when GREF = 1,
and the internal V_REF = 1.25 V when GREF = 0 (see AMC Status/Configuration Register for details).
4