Datasheet
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RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
ADS5542
SBAS308D – MAY 2004 – REVISED FEBRUARY 2007
MIN TYP MAX UNIT
SUPPLIES
Analog supply voltage, AV
DD
3 3.3 3.6 V
Output driver supply voltage, DRV
DD
3 3.3 3.6 V
ANALOG INPUT
Differential input range 2.3 V
PP
Input common-mode voltage, V
CM
(1)
1.45 1.55 1.65 V
DIGITAL OUTPUT
Maximum output load 10 pF
CLOCK INPUT
ADCLK input sample rate (sine wave) 1/t
C
2 80 MSPS
Clock amplitude, sine wave, differential
(2)
1 3 V
PP
Clock duty cycle
(3)
50%
Open free-air temperature range –40 85 ° C
(1) Input common-mode should be connected to CM.
(2) See Figure 47 for more information.
(3) See Figure 46 for more information.
Typical values given at T
A
= 25 ° C, min and max specified over the full recommended operating temperature range, AV
DD
=
DRV
DD
= 3.3 V, sampling rate = 80 MSPS, 50% clock duty cycle, 3-V
PP
differential clock, and –1dBFS differential input,
unless otherwise noted
PARAMETER CONDITIONS MIN TYP MAX UNIT
Resolution 12 Bits
Analog Inputs
Differential input range 2.3 V
PP
Differential input impedance See Figure 37 6.6 k Ω
Differential input capacitance See Figure 37 4 pF
Analog input common-mode current (per
200 µ A
input)
Analog input bandwidth Source impedance = 50 Ω 750 MHz
Voltage overload recovery time 4 Clock cycles
Internal Reference Voltages
Reference bottom voltage, V
REFM
1.0 V
Reference top voltage, V
REFP
2.15 V
Reference error –4% ± 0.6% 4%
Common-mode voltage output, V
CM
1.55 ± 0.05 V
Dynamic DC Characteristics and Accuracy
No missing codes Assured
Differential nonlinearity error, DNL f
IN
= 10 MHz -0.9 0.5 1.1 LSB
Integral nonlinearity error, INL f
IN
= 10 MHz –5 ± 2 5 LSB
Offset error -11 ± 1.5 11 mV
Offset temperature coefficient 0.02 mV/ ° C
∆ offset error/ ∆ AV
DD
from AV
DD
= 3 V to
DC power-supply rejection ratio, DC PSRR 0.25 mV/V
AV
DD
= 3.6 V
Gain error
(1)
-2 0.3 2 %FS
Gain temperature coefficient –0.02 ∆ %/ ° C
(1) Gain error is specified by design and characterization; it is not tested in production.
3
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