Analog Devices AD5934, Manual

Page: 5 / 40

AD5934
Rev. A | Page 5 of 40
Y Version
1
Parameter Min Typ Max Unit Test Conditions/Comments
RECEIVE STAGE
Input Leakage Current 1 nA To VIN pin
Input Capacitance
5
0.01 pF Pin capacitance between VOUT and GND
Feedback Capacitance, C
FB
3 pF Feedback capacitance around current-to-
voltage amplifier; appears in parallel with
feedback resistor
ANALOG-TO-DIGITAL CONVERTER
5
Resolution 12 Bits
Sampling Rate 250 kSPS ADC throughput rate
LOGIC INPUTS
Input High Voltage, V
IH
0.7 × VDD
Input Low Voltage, V
IL
0.3 × VDD
Input Current
6
1 μA T
A
= 25°
Input Capacitance 7 pF T
A
= 25°C
POWER REQUIREMENTS
VDD 2.7 5.5 V
I
DD
, Normal Mode 10 15 mA VDD = 3.3 V
17 25 mA VDD = 5.5 V
I
DD
, Standby Mode 7 mA VDD = 3.3 V; see the Control Register section
9 mA VDD = 5.5 V
I
DD
, Power-Down Mode 0.7 5 μA VDD = 3.3 V
1 8 μA VDD = 5.5 V
1 Temperature range for Y version = −40°C to +125°C, typical at +25°C.
2 The lower limit of the output excitation frequency can be lowered by scaling the clock supplied to the AD5934.
3
The peak-to-peak value of the ac output excitation voltage scales with supply voltage according to the following formula. VDD is the supply voltage.
Output Excitation Voltage (V p-p) = [2/3.3] × VDD
4 The dc bias value of the output excitation voltage scales with supply voltage according to the following formula. VDD is the supply voltage.
Output Excitation Voltage (V p-p) = [2/3.3] × VDD
5
Guaranteed by design or characterization, not production tested. Input capacitance at the VOUT pin is equal to pin capacitance divided by open-loop gain of current-
to-voltage amplifier.
6 The accumulation of the currents into Pin 8, Pin 15, and Pin 16.