
REV. B
–3–
AD7724
Parameter
A Version
Unit
Test Conditions/Comments
LOGIC OUTPUTS
VOH, Output High Voltage
DVDD1 – 0.2
V min
|IOUT|
≤ 200 A
VOL, Output Low Voltage
0.4
V max
|IOUT|
≤ 1.6 mA
POWER SUPPLIES
AVDD/DVDD
4.75/5.25
V min/V max
DVDD1
2.85/5.25
V min/V max
IDD (Total for AVDD, DVDD)
Digital Inputs Equal to 0 V or DVDD
Active Mode
60
mA max
Standby Mode
20
A max
NOTES
1Operating temperature range is as follows: A Version: –40
°C to +85°C.
2Gain Error excludes reference error. The modulator gain is calibrated wrt the voltage on the REF2 pin.
3Measurement Bandwidth = 0.5
× f
MCLK; Input Level = –0.05 dB.
4When a square wave clock is used, the dynamic specifications will degrade by 1 dB typically.
Specifications subject to change without notice.
BIT STREAM
94.25kHz
FILTER 1
120dB
304.687kHz
BANDWIDTH = 94.25kHz
TRANSITION = 304.687kHz
ATTENUATION = 120dB
COEFFICIENTS = 384
DECIMATE
BY 32
FILTER 2
16-BIT
OUTPUT
94.25kHz
90dB
108.874kHz
BANDWIDTH = 94.25kHz
TRANSITION = 108.874kHz
ATTENUATION = 90dB
COEFFICIENTS = 151
DECIMATE
BY 2
Figure 1. Digital Filter (Consists of Two FIR Filters). This Filter is Implemented on the AD7722.