ADC12C080 Datasheet, PDF (7/32 Pages) National Semiconductor (TI) – 12-Bit, 65/80 MSPS A/D Converter

ADC12C080
www.ti.com
SNAS379C – SEPTEMBER 2006 – REVISED APRIL 2013
ADC12C080 Dynamic Converter Electrical Characteristics
Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, V_A = +3.0V, V_DR = +2.5V, Internal V_REF
= +1.2V, f_CLK = 80 MHz, 50% Duty Cycle, DCS Disabled, 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)}
Symbol
Parameter
Conditions
Typical
(3)
Limits
Units
(Limits) ⁽⁴⁾
DYNAMIC CONVERTER CHARACTERISTICS, A_IN= -1dBFS
FPBW Full Power Bandwidth
-1 dBFS Input, −3 dB Corner
1.0
GHz
SNR
Signal-to-Noise Ratio
SFDR Spurious Free Dynamic Range
ENOB Effective Number of Bits
THD
Total Harmonic Disortion
H2
Second Harmonic Distortion
H3
Third Harmonic Distortion
SINAD Signal-to-Noise and Distortion Ratio
IMD
Intermodulation Distortion
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 10 MHz
f_IN = 70 MHz
f_IN = 170 MHz
f_IN = 19.5MHz and 20.5MHz, each -7dBFS
71.2
70.5
68.5
90
88
86
11.5
11.3
11.1
−88
−86
−85
−95
−90
−86
−90
−88
−86
71.1
70
68.5
-82
67.8
82
10.9
-80.5
-82
-82
67.6
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
Bits
Bits
Bits
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
(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 per Note 4 under Absolute Maximum Ratings. 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.
V_A
I/O
To Internal Circuitry
AGND
(2) With a full scale differential input of 2V_P-P , the 12-bit LSB is 488 µV.
(3) 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 ensured.
(4) Parameters specified in dBFS indicate the value that would be attained with a full-scale input signal.
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