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Maxim MAX5865 Manual de usuario Pagina 6

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MAX5865
Ultra-Low-Power, High-Dynamic-
Performance, 40Msps Analog Front End
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3V, OV
DD
= 1.8V, internal reference (1.024V), C
L
≈ 10pF on all digital outputs, f
CLK
= 40MHz, ADC input amplitude = -0.5dBFS,
DAC output amplitude = 0dBFS, differential ADC input, differential DAC output, C
REFP
= C
REFN
= C
COM
= 0.33µF, Xcvr mode, unless
otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
From idle to Rx mode with CLK present
during idle, Figure 6, ADC settles to within
1dB SINAD
10
Idle Wake-Up Time (with CLK)
t
WAKE
ST0
From idle to Tx mode with CLK present
during idle, Figure 6, DAC settles to 10 LSB
error
10
µs
From standby to Rx mode, Figure 6, ADC
settles to within 1dB SINAD
10
Standby Wake-Up Time
t
WAKE
ST1
From standby to Tx mode, Figure 6, DAC
settles to 10 LSB error
40
µs
Enable Time from Xcvr or Tx to Rx t
ENABLE
Rx
ADC settles to within 1dB SINAD 10 µs
Enable Time from Xcvr or Rx to Tx t
ENABLE
Tx
DAC settles to 10 LSB error 10 µs
INTERNAL REFERENCE (REFIN = V
DD
. V
REFP
, V
REFN
and V
COM
are generated internally.)
Positive Reference V
REFP
- V
COM
0.256
V
Negative Reference V
REFN
- V
COM
-0.256
V
Common-Mode Output Voltage V
COM
V
DD
/ 2
- 0.15
V
DD
/ 2
V
DD
/ 2
+ 0.15
V
Differential Reference Output V
REF
V
REFP
- V
REFN
+0.49 +0.512 +0.534
V
Differential Reference
Temperature Coefficient
REFTC
±30
ppm/°C
Maximum REFP/REFN/COM
Source Current
I
SOURCE
2mA
Maximum REFP/REFN/COM
Sink Current
I
SINK
2mA
BUFFERED EXTERNAL REFERENCE (REFIN = 1.024V. V
REFP
, V
REFN
, and V
COM
are generated internally.)
Reference Input V
REFIN
1.024
V
Differential Reference Output V
DIFF
V
REFP
- V
REFN
0.512
V
Common-Mode Output Voltage V
COM
V
DD
/ 2
V
Maximum REFP/REFN/COM
Source Current
I
SOURCE
2mA
Maximum REFP/REFN/COM
Sink Current
I
SINK
2mA
REFIN Input Resistance
>500
kΩ
REFIN Input Current
-0.7
µA
DIGITAL INPUTS (CLK, SCLK, DIN, CS, DD0–DD9)
Input High Threshold V
INH
DD0–DD9, CLK, SCLK, DIN, CS
0.7 x
OV
DD
V
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