Datasheet
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ADS820
3
SBAS037B
ADS820U, E
PARAMETER CONDITIONS TEMP MIN TYP MAX UNITS
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= +25°C, V
S
= +5V, Sampling Rate = 20MHz, with a 50% duty cycle clock having a 2ns rise/fall time, unless otherwise noted.
NOTE: (1) dBFS refers to dB below Full Scale. (2) Percentage accuracies are referred to the internal A/D Converter Full-Scale Range of 4Vp-p. (3) IMD is
referred to the larger of the two input signals. If referred to the peak envelope signal (≈ 0dB), the intermodulation products will be 7dB lower. (4) Based on
(SINAD – 1.76)/6.02. (5) No “rollover” of bits.
Signal-to-Noise Ratio (SNR)
f = 500kHz (–1dBFS input) +25°C 58 60.5 dB
Full 56 60 dB
f = 10MHz (–1dBFS input) +25°C58 60 dB
Full 56 60 dB
Signal-to-(Noise + Distortion) (SINAD)
f = 500kHz (–1dBFS input) +25°C 58 60.5 dB
Full 55 60 dB
f = 10MHz (–1dBFS input) +25°C56 58 dB
Full 54 57 dB
Differential Gain Error NTSC or PAL +25°C 0.5 %
Differential Phase Error NTSC or PAL +25°C 0.1 degrees
Effective Bits
(4)
f
IN
= 3.58MHz 9.5 Bits
Aperture Delay Time +25°C2 ns
Aperture Jitter +25°C 7 ps rms
Overvoltage Recovery Time
(5)
1.5x Full-Scale Input +25°C2 ns
OUTPUTS
Logic Family TTL/HCT Compatible CMOS
Logic Coding Logic Selectable SOB or BTC V
Logic Levels Logic LOW, C
L
= 15pF Full 0 0.4 V
Logic HIGH, C
L
= 15pF Full 2.5 +V
S
V
3-State Enable Time 20 40 ns
3-State Disable Time Full 2 10 ns
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +V
S
Operating Full +4.75 +5 +5.25 V
Supply Current: +I
S
Operating +25°C3947mA
Operating Full 40 55 mA
Power Consumption Operating +25°C 195 235 mW
Operating Full 200 275 mW
Thermal Resistance,
θ
JA
SO-28 75 °C/W