Datasheet

ADT7411
Rev. B | Page 3 of 36
SPECIFICATIONS
V
DD
= 2.7 V to 5.5 V, GND = 0 V, unless otherwise noted. Temperature ranges are −40°C to +120°C.
Table 1.
Parameter
1
Min Typ Max Unit Conditions/Comments
ADC DC ACCURACY Maximum V
DD
= 5 V.
Resolution 10 Bits
Total Unadjusted Error (TUE) 2 3 % of FSR V
DD
= 2.7 V to 5.5 V.
2 % of FSR V
DD
= 3.3 V (±10%).
Offset Error ±0.5 % of FSR
Gain Error ±2 % of FSR
ADC BANDWIDTH DC Hz
ANALOG INPUTS
Input Voltage Range 0 2.25 V AIN1 to AIN8. C4 = 0 in Control Configuration 3.
0 V
DD
V AIN1 to AIN8. C4 = 1 in Control Configuration 3.
DC Leakage Current ±1 μA
Input Capacitance 5 20 pF
Input Resistance 10 MΩ
THERMAL CHARACTERISTICS Internal reference used. Averaging on.
Internal Temperature Sensor
Accuracy @ V
DD
= 3.3 V ± 10% ±1.5 °C T
A
= 85°C.
±0.5 ±3 °C T
A
= 0°C to 85°C.
±2 ±5 °C T
A
= −40°C to +120°C.
Accuracy @ V
DD
= 5 V ± 5% ±2 ±3 °C T
A
= 0°C to 85°C.
±3 ±5 °C T
A
= −40°C to +120°C.
Resolution 10 Bits Equivalent to 0.25°C.
Long-Term Drift 0.25 °C Drift over 10 years if part is operated at 55°C.
External Temperature Sensor External transistor = 2N3906.
Accuracy @ V
DD
= 3.3 V ± 10% ±1.5 °C T
A
= 85°C.
±3 °C T
A
= 0°C to 85°C.
±5 °C T
A
= −40°C to +120°C.
Accuracy @ V
DD
= 5 V ± 5% ±2 ±3 °C T
A
= 0°C to 85°C.
±3 ±5 °C T
A
= −40°C to +120°C.
Resolution 10 Bits Equivalent to 0.25°C.
Output Source Current 180 μA High level.
11 μA Low level.
CONVERSION TIMES Single-channel mode.
Slow ADC
V
DD
/AIN 11.4 ms Averaging (16 samples) on.
712 μs Averaging off.
Internal Temperature 11.4 ms Averaging (16 samples) on.
712 μs Averaging off.
External Temperature 24.22 ms Averaging (16 samples) on.
1.51 ms Averaging off.
Fast ADC
V
DD
/AIN 712 μs Averaging (16 samples) on.
44.5 μs Averaging off.
Internal Temperature 2.14 ms Averaging (16 samples) on.
134 μs Averaging off.
External Temperature 14.25 ms Averaging (16 samples) on.
890 μs Averaging off.