–3–
REV. 0
AD7720
B Version
Units
Test Conditions/Comments
LOGIC INPUTS
VIH, Input High Voltage
2
V min
VIL, Input Low Voltage
0.8
V max
IINH, Input Current
10
A max
CIN, Input Capacitance
10
pF max
LOGIC OUTPUTS
VOH, Output High Voltage
2.4
V min
|IOUT|
≤ 200 A
VOL, Output Low Voltage
0.4
V max
|IOUT|
≤ 1.6 mA
POWER SUPPLIES
AVDD
4.75/5.25
V min/V max
DVDD
4.75/5.25
V min/V max
IDD (Total for AVDD, DVDD)
Digital Inputs Equal to 0 V or DVDD
Active Mode
43
mA max
Standby Mode
25
A max
NOTES
1Operating temperature range is as follows: B Version: –40
°C to +85°C.
2Gain Error excludes reference error. The modulator gain is calibrated w.r.t. the voltage on the REF2 pin.
3Applies after calibration at temperature of interest.
4Measurement Bandwidth = 0.5
× f
MCLK; Input Level = –0.05 dB.
5T
A = +25°C to +85°C/TA = TMIN to TMAX.
Specifications subject to change without notice.
BIT STREAM
90.625kHz
FILTER 1
120dB
292.969kHz
BANDWIDTH = 90.625 kHz
TRANSITION = 292.969kHz
ATTENUATION = 120dB
COEFFICIENTS = 384
DECIMATE
BY 32
FILTER 2
16-BIT
OUTPUT
90.625kHz
90dB
104.687kHz
BANDWIDTH = 90.625 kHz
TRANSITION = 104.687kHz
ATTENUATION = 90dB
COEFFICIENTS = 151
DECIMATE
BY 2
Figure 1. Digital Filter (Consists of 2 FIR Filters). This filter is implemented on the AD7722.