Datasheet
AD7933/AD7934
Rev. B | Page 4 of 32
Parameter Value
1
Unit Test Conditions/Comments
REFERENCE INPUT/OUTPUT
V
REF
Input Voltage
5
2.5 V ±1% specified performance
DC Leakage Current
4
±1 μA max
V
REFOUT
Output Voltage 2.5 V ±0.2% max @ 25°C
V
REFOUT
Temperature Coefficient 25 ppm/°C max
5 ppm/°C typ
V
REF
Noise 10 μV typ 0.1 Hz to 10 Hz bandwidth
130 μV typ 0.1 Hz to 1 MHz bandwidth
V
REF
Output Impedance 10 Ω typ
V
REF
Input Capacitance 15 pF typ When in track
25 pF typ When in hold
LOGIC INPUTS
Input High Voltage, V
INH
2.4 V min
Input Low Voltage, V
INL
0.8 V max
Input Current, I
IN
±5 μA max Typically 10 nA, V
IN
= 0 V or V
DRIVE
Input Capacitance, C
IN
4
10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
2.4 V min I
SOURCE
= 200 μA
Output Low Voltage, V
OL
0.4 V max I
SINK
= 200 μA
Floating-State Leakage Current ±3 μA max
Floating-State Output Capacitance
4
10 pF max
Output Coding Straight (natural) binary CODING bit = 0
Twos complement CODING bit = 1
CONVERSION RATE
Conversion Time t
2
+ 13 t
CLK
ns
Track-and-Hold Acquisition Time 125 ns max Full-scale step input
80 ns typ Sine wave input
Throughput Rate 1.5 MSPS max
POWER REQUIREMENTS
V
DD
2.7/5.25 V min/max
V
DRIVE
2.7/5.25 V min/max
I
DD
6
Digital inputs = 0 V or V
DRIVE
Normal Mode (Static) 0.8 mA typ V
DD
= 2.7 V to 5.25 V, SCLK on or off
Normal Mode (Operational) 2.7 mA max V
DD
= 4.75 V to 5.25 V
2.0 mA max V
DD
= 2.7 V to 3.6 V
Autostandby Mode 0.3 mA typ F
SAMPLE
= 100 kSPS, V
DD
= 5 V
160 μA typ Static
Full/Autoshutdown Mode (Static) 2 μA max SCLK on or off
Power Dissipation
Normal Mode (Operational) 13.5 mW max V
DD
= 5 V
6 mW max V
DD
= 3 V
Autostandby Mode (Static) 800 μW typ V
DD
= 5 V
480 μW typ V
DD
= 3 V
Full/Autoshutdown Mode 10 μW max V
DD
= 5 V
6 μW max V
DD
= 3 V
1
Temperature range is −40°C to +85°C.
2
See Terminology section.
3
V
CM
is the common-mode voltage. For full common-mode range, see Figure 25 and Figure 26. V
IN+
and V
IN−
must always remain within GND/V
DD
.
4
Sample tested during initial release to ensure compliance.
5
This device is operational with an external reference in the range of 0.1 V to V
DD
. See the Reference section for more information.
6
Measured with a midscale dc analog input.