Datasheet

ADT7316/ADT7317/ADT7318
Rev. B | Page 4 of 44
Parameter
1
Min Typ Max Unit Conditions/Comments
CONVERSION TIMES Single channel mode.
Slow ADC
V
DD
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
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.
ROUND ROBIN UPDATE RATE
4
Time to complete one measurement cycle
through all channels.
Slow ADC at 25°C
59.95 ms Averaging on.
6.52 ms Averaging off.
Fast ADC at 25°C
19.59 ms Averaging on.
2.89 ms Averaging off.
DAC EXTERNAL REFERENCE INPUT
5
V
REF
Input Range 1 V
DD
V Buffered reference mode.
V
REF
Input Range 0.25 V
DD
V Unbuffered reference mode.
V
REF
Input Impedance 37 45 kΩ Unbuffered reference mode.
0 V to 2 V
REF
output range.
74 90 kΩ Unbuffered reference mode.
0 V to V
REF
output range.
>10 MΩ Buffered reference mode and power-down
mode.
Reference Feedthrough
−90
dB Frequency = 10 kHz.
Channel-to-Channel Isolation
−75
dB Frequency = 10 kHz.
ON-CHIP REFERENCE
Reference Voltage
5
2.2662 2.28 2.2938 V
Temperature Coefficient
5
80 ppm/°C
OUTPUT CHARACTERISTICS
5
Output Voltage
6
0.001 V
DD
to 0.001 V This is a measure of the minimum and maximum
drive capability of the output amplifier.
DC Output Impedance 0.5 Ω
Short-Circuit Current 25 mA V
DD
= 5 V.
16 mA V
DD
= 3 V.
Power-Up Time 2.5 μs Coming out of power-down mode. V
DD
= 5 V.
5 μs Coming out of power-down mode. V
DD
= 3.3 V.
DIGITAL INPUTS
5
Input Current ±1 μA V
IN
= 0 V to V
DD
.
Input Low Voltage, V
IL
0.8 V
Input High Voltage, V
IH
1.89 V
Pin Capacitance 3 10 pF All digital inputs.
SCL, SDA Glitch Rejection 50 ns Input filtering suppresses noise spikes of less than
50 ns.
LDAC
Pulse Width
20 ns Edge triggered input.