MAX19705ETM Просмотр технического описания (PDF) - Maxim Integrated
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MAX19705ETM Datasheet PDF : 37 Pages
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10-Bit, 7.5Msps, Ultra-Low-Power
Analog Front-End
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 3V, OVDD = 1.8V, internal reference (1.024V), CL ≈ 10pF on all digital outputs, fCLK = 7.5MHz (50% duty cycle), Rx ADC input
amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output, CREFP = CREFN =
CCOM = 0.33µF, unless otherwise noted. CL < 5pF on all aux-DAC outputs. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Enable Time from Tx to Rx (Ext2-Tx
to Ext2-Rx, Ext4-Tx to Ext4-Rx, and tENABLE, RX ADC settles to within 1dB SINAD
SPI4-Tx to SPI3-Rx States)
500
ns
Enable Time from Rx to Tx (Ext1-Rx
to Ext1-Tx, Ext4-Rx to Ext4-Tx, and
SPI3-Rx to SPI4-Tx States)
tENABLE, TX DAC settles to within 10 LSB error
500
ns
Enable Time from Tx to Rx (Ext1-Tx
to Ext1-Rx, Ext3-Tx to Ext3-Rx, and tENABLE, RX ADC settles to within 1dB SINAD
SPI1-Tx to SPI2-Rx States)
8.1
µs
Enable Time from Rx to Tx (Ext2-Rx
to Ext2-Tx, Ext3-Rx to Ext3-Tx, and
SPI1-Rx to SPI2-Tx States)
tENABLE,TX DAC settles to within 10 LSB error
6.0
µs
INTERNAL REFERENCE (VREFIN = VDD; VREFP, VREFN, VCOM levels are generated internally)
Positive Reference
VREFP - VCOM
0.256
V
Negative Reference
VREFN - VCOM
-0.256
V
Common-Mode Output Voltage
VCOM
VDD / 2
- 0.15
VDD / 2
VDD / 2
+ 0.15
V
Maximum REFP/REFN/COM
Source Current
ISOURCE
2
mA
Maximum REFP/REFN/COM
Sink Current
ISINK
2
mA
Differential Reference Output
Differential Reference Temperature
Coefficient
VREF
REFTC
VREFP - VREFN
+0.46 +0.512 +0.55
V
±10
ppm/°C
BUFFERED EXTERNAL REFERENCE (external VREFIN = 1.024V applied; VREFP, VREFN, VCOM levels are generated internally)
Reference Input Voltage
VREFIN
1.024
V
Differential Reference Output
VDIFF
VREFP - VREFN
0.512
V
Common-Mode Output Voltage
VCOM
VDD / 2
V
Maximum REFP/REFN/COM
Source Current
ISOURCE
2
mA
Maximum REFP/REFN/COM
Sink Current
ISINK
2
mA
REFIN Input Current
REFIN Input Resistance
-0.7
µA
500
kΩ
8 _______________________________________________________________________________________
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