Datasheet

AD7783
–3–
Parameter AD7783B Unit Test Conditions
LOGIC INPUTS
All Inputs Except SCLK and XTAL1
2
V
INL
, Input Low Voltage 0.8 V max V
DD
= 5 V
0.4 V max V
DD
= 3 V
V
INH
, Input High Voltage 2.0 V min V
DD
= 3 V or 5 V
SCLK Only (Schmitt-Triggered Input)
2
V
T(+)
1.4/2 V min/V max V
DD
= 5 V
V
T(–)
0.8/1.4 V min/V max V
DD
= 5 V
V
T(+)
– V
T(–)
0.3/0.85 V min/V max V
DD
= 5 V
V
T(+)
0.95/2 V min/V max V
DD
= 3 V
V
T(–)
0.4/1.1 V min/V max V
DD
= 3 V
V
T(+)
– V
T(–)
0.3/0.85 V min/V max V
DD
= 3 V
XTAL1 Only
2
V
INL
, Input Low Voltage 0.8 V max V
DD
= 5 V
V
INH
, Input High Voltage 3.5 V min V
DD
= 5 V
V
INL
, Input Low Voltage 0.4 V max V
DD
= 3 V
V
INH
, Input High Voltage 2.5 V min V
DD
= 3 V
Input Currents ± 1 mA max V
IN
= V
DD
–70 mA max V
IN
= GND, Typically –40 mA at 5 V and
–20 mA at 3 V
Input Capacitance 10 pF typ All Digital Inputs
LOGIC OUTPUTS (Excluding XTAL2)
V
OH
, Output High Voltage
2
V
DD
– 0.6 V min V
DD
= 3 V, I
SOURCE
= 100 mA
V
OL
, Output Low Voltage
2
0.4 V max V
DD
= 3 V, I
SINK
= 100 mA
V
OH
, Output High Voltage
2
4V minV
DD
= 5 V, I
SOURCE
= 200 mA
V
OL
, Output Low Voltage
2
0.4 V max V
DD
= 5 V, I
SINK
= 1.6 mA
Floating-State Leakage Current ± 10 mA max
Floating-State Output Capacitance ± 10 pF typ
Data Output Coding Offset Binary
START-UP TIME
From Power-On 300 ms typ
POWER REQUIREMENTS
Power Supply Voltage
V
DD
– GND 2.7/3.6 V min/V max V
DD
= 3 V nom
4.75/5.25 V min/V max V
DD
= 5 V nom
Power Supply Currents
I
DD
Current (Normal Mode)
4
1.5 mA max V
DD
= 3 V, 1.3 mA typ
1.7 mA max V
DD
= 5 V, 1.5 mA typ
I
DD
(Power-Down Mode, CS = 1) 9 mA max V
DD
= 3 V, 6 mA typ
24 mA max V
DD
= 5 V, 20 mA typ
NOTES
1
Temperature range –40∞C to +85∞C.
2
Guaranteed by design and/or characterization data on production release.
3
When a 28.8 kHz crystal is used, normal-mode rejection is improved so that the rejection equals 75 dB at 50 Hz ± 1 Hz and equals 66 dB at 60 Hz ± 1 Hz.
4
Normal mode refers to the case where the ADC is running.
Specifications subject to change without notice.
REV. C