AD9432-105 Analog Devices, AD9432-105 Datasheet - Page 5

• Manufacturer Part Number: AD9432-105
• Description: 12-Bit, 105 MSPS Analog-to-digital Converter
• Manufacturer: Analog Devices

Pin Number (AD9432BST)
1, 3, 4, 9, 11, 33, 34, 35, 38, 39, 40, 43, 48, 51 GND
2, 5, 6, 10, 36, 37, 42, 44, 47, 52
7
8
14
15–20, 25–30
12, 21, 24, 31
13, 22, 23, 32
41
45
46
49
50
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.
ENCODE
ENCODE
DGND
Mnemonic
V
ENCODE
ENCODE
OR
D11–D6, D5–D0 Digital Output
DGND
V
DNC
VREFIN
VREFOUT
AIN
AIN
GND
GND
GND
GND
GND
V
V
V
V
V
CC
DD
CC
CC
CC
CC
DD
PIN FUNCTION DESCRIPTIONS
10
11
12
13
1
2
3
4
5
6
7
8
9
52 51 50 49 48
14 15 16 17 18 19 20 21 22 23 24 25 26
PIN CONFIGURATION
PIN 1
IDENTIFIER
(Not to Scale)
TOP VIEW
AD9432
Function
Analog Ground
Analog Supply (5 V)
Encode Clock for ADC–Complementary
Encode Clock for ADC–True (ADC samples on rising edge of ENCODE)
Out of Range Output
Digital Output Ground
Digital Output Power Supply (2.7 V to 3.6 V)
Do Not Connect
Reference Input for ADC (2.5 V Typical); Bypass with 0.1 F to Ground.
Internal Reference Output (2.5 V Typical)
Analog Input–True
Analog Input–Complementary
47 46 45 44
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.
43 42 41 40
39
38
37
36
35
34
33
32
31
30
29
28
27
GND
GND
V
V
GND
GND
GND
V
DGND
D0 (LSB)
D1
D2
D3
CC
CC
DD
AD9432