Texas Instruments The ADC12DC105 is a dual 12-Bit, 105 Msps A/D Converter ADC12DC105LFEB/NOPB ADC12DC105LFEB/NOPB 데이터 시트
제품 코드
ADC12DC105LFEB/NOPB
V
A
AGND
To Internal Circuitry
I/O
SNAS469A – SEPTEMBER 2008 – REVISED OCTOBER 2008
Dynamic Converter Electrical Characteristics (continued)
Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, V
A
= +3.3V, V
DR
= +2.5V, Internal V
REF
= +1.2V, f
CLK
= 105 MHz, V
CM
= V
CMO
, C
L
= 5 pF/pin, . Typical values are for T
A
= 25°C. Boldface limits apply for T
MIN
≤
T
A
≤
T
MAX
. All other limits apply for T
A
= 25°C
Units
Parameter
Test Conditions
Typical
(3)
Limits
(Limits)
(4)
f
IN
= 10 MHz
−
86
dBFS
f
IN
= 70 MHz
−
85
dBFS
THD
Total Harmonic Disortion
f
IN
= 170 MHz
−
84
-76.5
dBFS
f
IN
= 240 MHz
-80
dBFS
f
IN
= 10 MHz
−
95
dBFS
f
IN
= 70 MHz
−
90
dBFS
H2
Second Harmonic Distortion
f
IN
= 170 MHz
−
83
-78
dBFS
f
IN
= 240 MHz
-84
dBFS
f
IN
= 10 MHz
−
90
dBFS
f
IN
= 70 MHz
−
86
dBFS
H3
Third Harmonic Distortion
f
IN
= 170 MHz
−
83
-78
dBFS
f
IN
= 240 MHz
-81
dBFS
f
IN
= 10 MHz
70.9
dBFS
f
IN
= 70 MHz
70.3
dBFS
SINAD
Signal-to-Noise and Distortion Ratio
f
IN
= 170 MHz
69
67.4
dBFS
f
IN
= 240 MHz
68.2
dBFS
IMD
Intermodulation Distortion
f
IN
= 20 MHz and 21 MHz, each -7dBFS
-84
dBFS
0 MHz tested channel, f
IN
= 10 MHz at -
Crosstalk
-100
dBFS
1dBFS other channel
Logic and Power Supply Electrical Characteristics
Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, V
A
= +3.3V, V
DR
= +2.5V, Internal V
REF
= +1.2V, f
CLK
= 105 MHz, V
CM
= V
CMO
, C
L
= 5 pF/pin. Typical values are for T
A
= 25°C. Boldface limits apply for T
MIN
≤
T
A
≤
T
MAX
. All other limits apply for T
A
= 25°C
(1) (2) (3)
Units
Parameter
Test Conditions
Typical
(4)
Limits
(Limits)
DIGITAL INPUT CHARACTERISTICS (CLK, PD_A,PD_B)
V
IN(1)
Logical “1” Input Voltage
V
D
= 3.3V
2.0
V (min)
V
IN(0)
Logical “0” Input Voltage
V
D
= 3.0V
0.8
V (max)
I
IN(1)
Logical “1” Input Current
V
IN
= 3.3V
10
µA
I
IN(0)
Logical “0” Input Current
V
IN
= 0V
−
10
µA
C
IN
Digital Input Capacitance
5
pF
(1)
The inputs are protected as shown below. Input voltage magnitudes above V
A
or below GND will not damage this device, provided
current is limited. However, errors in the A/D conversion can occur if the input goes above 2.6V or below GND as described in the
Operating Ratings section.
Operating Ratings section.
(2)
With a full scale differential input of 2V
P-P
, the 12-bit LSB is 488 µV.
(3)
When the input voltage at any pin exceeds the power supplies (that is, V
IN
< AGND, or V
IN
> V
A
), the current at that pin should be
limited to ±5 mA. The ±50 mA maximum package input current rating limits the number of pins that can safely exceed the power
supplies with an input current of ±5 mA to 10.
supplies with an input current of ±5 mA to 10.
(4)
Typical figures are at T
A
= 25°C and represent most likely parametric norms at the time of product characterization. The typical
specifications are not guaranteed.
Copyright © 2008, Texas Instruments Incorporated
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