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AD7720BRUZ-REEL

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
–3–REV. 0
AD7720
Parameter B Version Units Test Conditions/Comments
LOGIC INPUTS
V
IH
, Input High Voltage 2 V min
V
IL
, Input Low Voltage 0.8 V max
I
INH
, Input Current 10 µA max
C
IN
, Input Capacitance 10 pF max
LOGIC OUTPUTS
V
OH
, Output High Voltage 2.4 V min |I
OUT
| ≤ 200 µA
V
OL
, Output Low Voltage 0.4 V max |I
OUT
| ≤ 1.6 mA
POWER SUPPLIES
AVDD 4.75/5.25 V min/V max
DVDD 4.75/5.25 V min/V max
I
DD
(Total for AVDD, DVDD) Digital Inputs Equal to 0 V or DVDD
Active Mode 43 mA max
Standby Mode 25 µA max
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
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.
AD7720
–4–
REV. 0
TIMING CHARACTERISTICS
(AVDD = +5 V 6 5%; DVDD = +5 V 6 5%; AGND = DGND = 0 V, REF2= +2.5 V unless otherwise noted)
Limit at T
MIN
, T
MAX
Parameter (B Version) Units Conditions/Comments
f
MCLK
100 kHz min Master Clock Frequency
15 MHz max 12.5 MHz for Specified Performance
t
1
67 ns min Master Clock Period
t
2
0.45 × t
MCLK
ns min Master Clock Input High Time
t
3
0.45 × t
MCLK
ns min Master Clock Input Low Time
t
4
15 ns min Data Hold Time After SCLK Rising Edge
t
5
10 ns min RESET Pulsewidth
t
6
10 ns min RESET Low Time Before MCLK Rising
t
7
20 × t
MCLK
ns max DVAL High Delay after RESET Low
NOTE
Guaranteed by design.
I
OL
1.6mA
I
OH
200 A
+1.6V
C
L
50pF
TO
OUTPUT
PIN
Figure 2. Load Circuit for Access Time and Bus Relinquish Time
SCLK (O)
DATA (O)
t
1
t
2
t
3
t
4
NOTE:
O SIGNIFIES AN OUTPUT
Figure 3. Data Timing
t
5
MCLK (I)
RESET (I)
DVAL (O)
t
6
t
7
NOTE:
I SIGNIFIES AN INPUT
O SIGNIFIES AN OUTPUT
Figure 4. RESET Timing
AD7720
–5–REV. 0
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7720 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= +25°C unless otherwise noted)
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
Digital Input Voltage to DGND . . –0.3 V to DVDD + 0.3 V
Analog Input Voltage to AGND . . . –0.3 V to AVDD + 0.3 V
Input Current to Any Pin Except Supplies
2
. . . . . . . ±10 mA
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . +150°C
TSSOP Package
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . 120°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2
Transient currents of up to 100 mA will not cause SCR latchup.
PIN CONFIGURATION
ORDERING GUIDE
Temperature Package Package
Model Range Description Option
AD7720BRU –40°C to +85°C 28-Lead Thin Shrink Small Outline RU-28
WARNING!
ESD SENSITIVE DEVICE
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AD7720
NC = NO CONNECT
NC
SCLK
DATA
MZERO
BIP
REF2
AGND
NC
STBY
GC
DGND
DVAL
XTAL1/MCLK
XTAL2
VIN(–)
AVDD
REF1
AVDD
RESET
VIN(+)
AGND
RESETO
DGND
AGND
DVDD
AGND
AGND
AGND
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

AD7720BRUZ-REEL

Mfr. #:
Buy AD7720BRUZ-REEL
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC CMOS Modulator w/ 90dB Dynamic Range
Lifecycle:
New from this manufacturer.
Delivery:
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