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AD9042ASTZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
AD9042
Rev. B | Page 6 of 24
ABSOLUTE MAXIMUM RATINGS
Table 4.
Parameter
1
Rating
AV
CC
Voltage 0 V to 7 V
DV
CC
Voltage 0 V to 7 V
Analog Input Voltage 0.5 V to 4.5 V
Analog Input Current 20 mA
Digital Input Voltage (ENCODE) 0 V to AV
CC
ENCODE, ENCODE Differential Voltage
4 V
Digital Output Current −40 to +40 mA
Operating Temperature Range (Ambient) −40 °C to +85°C
Maximum Junction Temperature +150°C
Lead Temperature (Soldering, 10 sec) +300°C
Storage Temperature Range (Ambient) −65°C to +150°C
1
Absolute maximum ratings are limiting values to be applied individually, and
beyond which the serviceability of the circuit may be impaired.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θ
JA
is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 5. Thermal Resistance
Package Type θ
JA
Unit
44-Lead LQFP 55 °C/W
EXPLANATION OF TEST LEVELS
I. 100% production tested.
II. 100% production tested at +25°C, and sample tested at
specified temperatures. AC testing done on sample basis.
III. Sample tested only.
IV. Parameter is guaranteed by design and characterization
testing.
V. Parameter is a typical value only.
VI. 100% production tested at +25°C; sample tested at
temperature extremes.
ESD CAUTION
AD9042
Rev. B | Page 7 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
44 43 42 41 40 39
38
37 36 35 34
32
31
30
27
28
29
33
26
25
24
23
2
3
4
7
6
5
1
8
9
10
11
NC = NO CONNECT
12
13
14
15 16 17 18
19
20
21 22
PIN 1
AD9042
TOP VIEW
(Not to Scale)
DV
CC
DV
CC
ENCODE
ENCODE
GND
GND
AIN
V
OFFSET
V
REF
C1
AV
CC
D11 (MSB)
GND
GND
GND
GND
D10
D9
DV
CC
DV
CC
DV
CC
DV
CC
D8
D7
D6
D5
D4
D3
D2
D1
D0 (LSB)
GND
NC
A
V
CC
A
V
CC
A
V
CC
A
V
CC
A
V
CC
GND
GND
GND
GND
GND
GND
00554-003
Figure 2. Pin Configuration
Table 6. Pin Function Descriptions
Pin No. Mnemonic Description
1, 2 DV
CC
5 V Power Supply (Digital). Powers output stage only.
3 ENCODE Encode Input. Data conversion initiated on rising edge.
4
ENCODE
Complement of ENCODE. Drive differentially with ENCODE or bypass to ground for single-ended clock mode.
5, 6 GND Ground.
7 AIN Analog Input.
8 V
OFFSET
Voltage Offset Input. Sets mid point of analog input range. Normally tied to V
REF
through a 50 Ω resistor.
9 V
REF
Internal Voltage Reference. Nominally 2.4 V; normally tied to V
OFFSET
through a 50 Ω resistor. Bypass to ground
and with 0.1 μF + 0.01 μF microwave chip capacitor.
10 C1 Internal Bias Point. Bypass to ground with a 0.01 μF capacitor.
11, 12 AV
CC
5 V Power Supply (Analog).
13, 14 GND Ground.
15, 16 AV
CC
5 V Power Supply (Analog).
17, 18 GND Ground.
19, 20 AV
CC
5 V Power Supply (Analog).
21, 22 GND Ground.
23 NC No Connect
24 GND Ground.
25 D0 (LSB) Digital Output Bit (Least Significant Bit).
26 to 33 D1 to D8 Digital Output Bits.
34, 35 GND Ground.
36, 37 DV
CC
5 V Power Supply (Digital). Powers output stage only.
38, 39 GND Ground.
40, 41 DV
CC
5 V Power Supply (Digital). Powers output stage only.
42, 43 D9 to D10 Digital Output Bits.
44
D11
(MSB)
Digital Output Bit (Most Significant Bit). Output coded as twos complement.
AD9042
Rev. B | Page 8 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
FREQUENCY (MHz)
0
–80
–120
–40
–100
–20
–60
POWER RELATIVE TO ADC FULL SCALE (dB)
ENCODE = 41MSPS
AIN = 1.2MHz
dc 4.1 8.2 12.3 16.4 20.5
2 3 4 5 6 7 8 9
00554-013
Figure 3. Single Tone at 1.2 MHz
FREQUENCY (MHz)
0
–80
–120
–40
–100
–20
–60
POWER RELATIVE TO ADC FULL SCALE (dB)
dc 4.1 8.2 12.3 16.4 20.5
ENCODE = 41MSPS
AIN = 9.6MHz
4 8 8 5 3 7 6 2
00554-014
Figure 4. Single Tone at 9.6 MHz
FREQUENCY (MHz)
0
–80
–120
–40
–100
–20
–60
POWER RELATIVE TO ADC FULL SCALE (dB)
dc 4.1 8.2 12.3 16.4 20.5
ENCODE = 41MSPS
AIN = 19.5MHz
2 4 6 8 9 7 5 3
00554-015
Figure 5. Single Tone at 19.5 MHz
ANALOG INPUT FREQUENCY (MHz)
WORST-CASE HARMONIC (dBc)
81
79
78
77
80
0 2 4 6 8 10 12 14 16 18 20
T = +85°C
T = –40°C
T = +25°C
ENCODE = 41MSPS
TEMP = –40°C, +25°C, AND +85°C
00554-016
Figure 6. Worst-Case Harmonics vs. AIN
SNR (dB)
70
68
67
66
69
ANALOG INPUT FREQUENCY (MHz)
0 2 4 6 8 101214161820
T = +25°C
T = +85°C
ENCODE = 41MSPS
TEMP = –40°C, +25°C, AND +85°C
0
0554-017
T = –40°C
Figure 7. SNR vs. AIN
ANALOG INPUT FREQUENCY (MHz)
90
80
30
WORST-CASE HARMONIC (dBc)
60
50
40
70
ENCODE = 41MSPS
1 2 4 102040 100
00554-018
Figure 8. Worst-Case Harmonics vs. AIN
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

AD9042ASTZ

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Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 12-Bit 41MSPS Monolithic
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