Datasheet

REV. D
–3–
AD9057
Test AD9057BRS-40 AD9057BRS-60 AD9057BRS-80
Parameter Temp Level Min Typ Max Min Typ Max Min Typ Max Unit
DIGITAL OUTPUTS
Logic 1 Voltage (V
DD
= 3 V) Full VI 2.95 2.95 2.95 V
Logic 1 Voltage (V
DD
= 5 V) Full IV 4.95 4.95 4.95 V
Logic 0 Voltage Full VI 0.05 0.05 0.05 V
Output Coding Offset Binary Code Offset Binary Code Offset Binary Code
POWER SUPPLY
V
D
Supply Current (V
D
= 5 V) Full VI 36 48 38 48 40 51 mA
V
DD
Supply Current (V
DD
= 3 V)
4
Full VI 4.0 6.5 5.5 6.5 7.4 8.8 mA
Power Dissipation
5, 6
Full VI 192 260 205 260 220 281 mW
Power-Down Dissipation Full VI 6 10 6 10 6 10 mW
Power Supply Rejection Ratio
(PSRR) 25∞CV 333mV/V
NOTES
1
Gain error and gain temperature coefficient are based on the ADC only (with a fixed 2.5 V external reference).
2
t
V
and t
PD
are measured from the 1.5 V level of the encode to the 10%/90% levels of the digital output swing. The digital output load during test is not to exceed
an ac load of 10 pF or a dc current of ± 40 mA.
3
SNR/harmonics based on an analog input voltage of –0.5 dBFS referenced to a 1.0 V full-scale input range.
4
Digital supply current based on V
DD
= 3 V output drive with <10 pF loading under dynamic test conditions.
5
Power dissipation is based on specified encode and 10.3 MHz analog input dynamic test conditions (V
D
= 5 V ± 5%, V
DD
= 3 V ± 5%).
6
Typical thermal impedance for the RS style (SSOP) 20-lead package: q
JC
= 46∞C/W, q
CA
= 80∞C/W, and q
JA
= 126∞C/W.
Specifications subject to change without notice.
N
N + 3
N + 1
N + 2
N + 4
N + 5
AIN
ENCODE
DIGITAL
OUTPUTS
t
A
t
EH
t
EL
t
V
t
PD
N – 3 N – 2 N – 1 N N + 1 N + 2
APERTURE DELAY
PULSEWIDTH HIGH
PULSEWIDTH LOW
OUTPUT VALID TIME
OUTPUT PROP DELAY
t
A
t
EH
t
EL
t
V
t
PD
4.0 ns
2.7 ns
6.6 ns
9.5 ns
166 ns
166 ns
MIN TYP MAX
Figure 1. Timing Diagram
EXPLANATION OF TEST LEVELS
Test Level Description
I 100% production tested.
II 100% production tested at 25∞C and sample
tested at specified temperatures.
III Sample tested only.
IV Parameter is guaranteed by design and charac-
terization testing.
VParameter is a typical value only.
VI 100% production tested at 25∞C; guaranteed
by design and characterization testing
for industrial temperature range.