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AD9432BSQZ-80 Datasheet(PDF) 5 Page - Analog Devices

Part # AD9432BSQZ-80
Description  12-Bit, 80 MSPS/105 MSPS ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9432BSQZ-80 Datasheet(HTML) 5 Page - Analog Devices

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REV. E
AD9432
–5–
PIN CONFIGURATION
52 51 50 49 48
43 42 41 40
47 46 45 44
14 15 16 17 18 19 20 21 22 23 24 25 26
1
2
3
4
5
6
7
8
9
10
11
13
12
PIN 1
IDENTIFIER
TOP VIEW
(Not to Scale)
39
38
37
36
35
34
33
32
31
30
29
28
27
GND
GND
AD9432
GND
VCC
VCC
GND
GND
GND
VDD
DGND
D0 (LSB)
D1
D2
D3
VCC
GND
GND
VCC
VCC
ENCODE
ENCODE
GND
VCC
GND
DGND
VDD
DEFINITION OF SPECIFICATIONS
Analog Bandwidth (Small Signal)
The analog input frequency at which the spectral power of the
fundamental frequency (as determined by the FFT analysis) is
reduced by 3 dB.
Aperture Delay
The delay between a differential crossing of ENCODE and
ENCODE and the instant at which the analog input is sampled.
Aperture Uncertainty (Jitter)
The sample-to-sample variation in aperture delay.
Differential Nonlinearity
The deviation of any code from an ideal 1 LSB step.
Encode Pulsewidth/Duty Cycle
Pulsewidth high is the minimum amount of time that the ENCODE
pulse should be left in Logic “1” state to achieve rated performance;
pulsewidth low is the minimum time ENCODE pulse should be left
in low state. At a given clock rate, these specs define an acceptable
Encode duty cycle.
Integral Nonlinearity
The deviation of the transfer function from a reference line
measured in fractions of 1 LSB using a “best straight line”
determined by a least square curve fit.
Minimum Conversion Rate
The encode rate at which the SNR of the lowest analog signal
frequency drops by no more than 3 dB below the guaranteed limit.
Maximum Conversion Rate
The encode rate at which parametric testing is performed.
Output Propagation Delay
The delay between a differential crossing of ENCODE and
ENCODE and the time when all output data bits are within
valid logic levels.
Power Supply Rejection Ratio
The ratio of a change in input offset voltage to a change in
power supply voltage.
Signal-to-Noise Plus Distortion (SINAD)
The ratio of the rms signal amplitude (set at 1 dB below full
scale) to the rms value of the sum of all other spectral compo-
nents, including harmonics but excluding dc.
Signal-to-Noise Ratio (SNR)
The ratio of the rms signal amplitude (set at 1 dB below full
scale) to the rms value of the sum of all other spectral compo-
nents, excluding the first five harmonics and dc.
PIN FUNCTION DESCRIPTIONS
Pin Number (AD9432BST)
Mnemonic
Function
1, 3, 4, 9, 11, 33, 34, 35, 38, 39, 40, 43, 48, 51
GND
Analog Ground
2, 5, 6, 10, 36, 37, 42, 44, 47, 52
VCC
Analog Supply (5 V)
7
ENCODE
Encode Clock for ADC–Complementary
8
ENCODE
Encode Clock for ADC–True (ADC samples on rising edge of ENCODE)
14
OR
Out of Range Output
15–20, 25–30
D11–D6, D5–D0 Digital Output
12, 21, 24, 31
DGND
Digital Output Ground
13, 22, 23, 32
VDD
Digital Output Power Supply (2.7 V to 3.6 V)
41
DNC
Do Not Connect
45
VREFIN
Reference Input for ADC (2.5 V Typical); Bypass with 0.1
µF to Ground.
46
VREFOUT
Internal Reference Output (2.5 V Typical)
49
AIN
Analog Input–True
50
AIN
Analog Input–Complementary


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