AD9238BST-20 Analog Devices Inc, AD9238BST-20 Datasheet - Page 6

• Manufacturer Part Number: AD9238BST-20
• Description: IC,A/D CONVERTER,DUAL,12-BIT,CMOS,QFP,64PIN
• Manufacturer: Analog Devices Inc

Specifications of AD9238BST-20

• Rohs Compliant: NO
• Rohs Status: RoHS non-compliant
• Number Of Bits: 12
• Sampling Rate (per Second): 20M
• Data Interface: Parallel
• Number Of Converters: 2
• Power Dissipation (max): 180mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP

AD9238
DIGITAL SPECIFICATIONS
AVDD = 3 V, DRVDD = 2.5 V, maximum sample rate, CLK_A = CLK_B; A
T
Table 3.
Parameter
LOGIC INPUTS
LOGIC OUTPUTS
1
SWITCHING SPECIFICATIONS
AVDD = 3 V, DRVDD = 2.5 V, maximum sample rate, CLK_A = CLK_B; A
T
Table 4.
Parameter
SWITCHING PERFORMANCE
DATA OUTPUT PARAMETER
OUT-OF-RANGE RECOVERY TIME
1
2
3
Output voltage levels measured with capacitive load only on each output.
The AD9238-65 model has a duty cycle stabilizer circuit that, when enabled, corrects for a wide range of duty cycles (see Figure 24).
Output delay is measured from clock 50% transition to data 50% transition, with a 5 pF load on each output.
Wake-up time is dependent on the value of the decoupling capacitors; typical values shown with 0.1 μF and 10 μF capacitors on REFT and REFB.
MIN
MIN
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
Input Capacitance
High Level Output Voltage
Low Level Output Voltage
Maximum Conversion Rate
Minimum Conversion Rate
CLK Period
CLK Pulse-Width High
CLK Pulse-Width Low
Output Delay
Pipeline Delay (Latency)
Aperture Delay (t
Aperture Uncertainty (t
Wake-Up Time
to T
to T
ANALOG
CLOCK
INPUT
MAX
MAX
DATA
OUT
, DCS enabled, unless otherwise noted.
, DCS enabled, unless otherwise noted.
2
1
3
(t
PD
A
)
)
N–9
1
1
N–1
J
)
Temp
Full
Full
Full
Full
Full
Full
Full
N–8
N
Temp
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Test
Level
IV
IV
IV
IV
IV
IV
IV
N–7
N+1
Test
Level
VI
V
V
V
V
VI
V
V
V
V
V
Min
2.0
−10
−10
DRVDD −
0.05
AD9238BST/BCP-20
N–6
N+2
Min
20
50.0
15.0
15.0
2
AD9238BST/BCP-20
Figure 2. Timing Diagram
Rev. C | Page 6 of 48
N–5
Typ
2
Typ
3.5
7
1.0
0.5
2.5
2
N+3
Max
0.8
+10
+10
0.05
Max
1
6
N–4
IN
IN
N+4
= −0.5 dBFS differential input, 1.0 V internal reference,
= −0.5 dBFS differential input, 1.0 V internal reference,
Min
2.0
−10
−10
DRVDD −
0.05
AD9238BST/BCP-40
Min
40
25.0
8.8
8.8
2
AD9238BST/BCP-40
N–3
N+5
Typ
3.5
7
1.0
0.5
2.5
2
Typ
2
N–2
N+6
Max
1
6
Max
0.8
+10
+10
0.05
N–1
N+7
Min
2.0
−10
−10
DRVDD −
0.05
Min
65
15.4
6.2
6.2
2
AD9238BST/BCP-65
AD9238BST/BCP-65
N
Typ
3.5
7
1.0
0.5
2.5
2
t
PD
N+8
=
MIN 2.0ns,
MAX 6.0ns
Typ
2
Max
1
6
Max
0.8
+10
+10
0.05
Unit
MSPS
MSPS
ns
ns
ns
ns
Cycles
ns
ps rms
ms
Cycles
Unit
V
V
μA
μA
pF
V
V