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