Datasheet

AD7991/AD7995/AD7999
Rev. B | Page 4 of 28
Y Version
Parameter Min Typ Max Unit Test Conditions/Comments
LOGIC INPUTS (SDA, SCL)
Input High Voltage, V
INH
0.7 (V
DD
) V V
DD
= 2.7 V to 5.5 V
0.9 (V
DD
) V V
DD
= 2.35 V to 2.7 V
Input Low Voltage, V
INL
0.3 (V
DD
) V V
DD
= 2.7 V to 5.5 V
0.1 (V
DD
) V V
DD
= 2.35 V to 2.7 V
Input Leakage Current, I
IN
±1 μA V
IN
= 0 V or V
DD
Input Capacitance, C
IN
6
10 pF
Input Hysteresis, V
HYST
0.1 (V
DD
) V
LOGIC OUTPUTS (OPEN DRAIN)
Output Low Voltage, V
OL
0.4 V I
SINK
= 3 mA
0.6 V I
SINK
= 6 mA
Floating-State Leakage Current ±1 μA
Floating-State Output Capacitance
6
10 pF
Output Coding Straight (natural) binary
THROUGHPUT RATE 18 × (1/f
SCL
)
f
SCL
≤ 1.7 MHz; see the Serial Interface
section
17.5 × (1/f
SCL
)
+ 2 μs
f
SCL
> 1.7 MHz; see the Serial Interface
section
POWER REQUIREMENTS
2
V
REF
= V
DD
; for f
SCL
= 3.4 MHz,
clock stretching is implemented
V
DD
2.7 5.5 V
I
DD
Digital inputs = 0 V or V
DD
ADC Operating, Interface Active
(Fully Operational)
0.09/0.25 mA V
DD
= 3.3 V/5.5 V, 400 kHz f
SCL
0.25/0.8 mA V
DD
= 3.3 V/5.5 V, 3.4 MHz f
SCL
Power-Down, Interface Active
7
0.07/0.16 mA V
DD
= 3.3 V/5.5 V, 400 kHz f
SCL
0.26/0.85 mA V
DD
= 3.3 V/5.5 V, 3.4 MHz f
SCL
Power-Down, Interface Inactive
7
1/1.6 μA V
DD
= 3.3 V/5.5 V
Power Dissipation
ADC Operating, Interface Active
(Fully Operational)
0.3/1.38 mW V
DD
= 3.3 V/5.5 V, 400 kHz f
SCL
0.83/4.4 mW V
DD
= 3.3 V/5.5 V, 3.4 MHz f
SCL
Power-Down, Interface Active
7
0.24/0.88 mW V
DD
= 3.3 V/5.5 V, 400 kHz f
SCL
0.86/4.68 mW V
DD
= 3.3 V/5.5 V, 3.4 MHz f
SCL
Power-Down, Interface Inactive
7
3.3/8.8 μW V
DD
= 3.3 V/5.5 V
1
Functional from V
DD
= 2.35 V.
2
Sample delay and bit trial delay enabled, t
1
= t
2
= 0.5/f
SCL
.
3
For f
SCL
up to 400 kHz, clock stretching is not implemented. Above f
SCL
= 400 kHz, clock stretching is implemented.
4
See the Terminology section.
5
For f
SCL
≤ 1.7 MHz, clock stretching is not implemented; for f
SCL
> 1.7 MHz, clock stretching is implemented.
6
Guaranteed by initial characterization.
7
See the Reading from the AD7991/AD7995/AD7999 section.