MAX19711ETN+T【PDF 17/36 页】IC ANLG FRNT END 56-TQFN

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Sheet目录2009

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MAX19711

10-Bit, 11Msps, Full-Duplex

Analog Front-End

______________________________________________________________________________________

Rx ADC outputs AD0–AD9 are forced to tri-state. The

Tx DAC DA0–DA9 inputs are internally pulled to OVDD,

while the Tx DAC outputs are at 0V. The wake-up time

is 6.8s to enter Rx mode, 5s to enter Tx mode, and

6.8s to enter FD mode. When the Rx ADC outputs

transition from tri-state to active, the last converted

word is placed on the digital output bus.

In standby mode, the reference is powered but all other

device functions are off. The wake-up time from stand-

by mode is 7.2s to enter Rx mode, 21.8s to enter Tx

mode, and 21.8s to enter FD mode. When the Rx ADC

outputs transition from tri-state to active, the last con-

verted word is placed on the digital output bus.

FAST and SLOW Rx and Tx Modes

The MAX19711 features FAST and SLOW modes for

switching between Rx and Tx operation. In FAST Tx

mode, the Rx ADC core is powered on but the ADC digi-

tal outputs AD0–AD9 are tri-stated. The Tx DAC digital

bus is active and the DAC core is fully operational.

Table 10. Offset Control Bits for ID and QD Channels (IOFFSET or QOFFSET Mode)

BITS IO5–IO0 WHEN IN IOFFSET MODE, BITS QO5–QO0 WHEN IN QOFFSET MODE

IO5/QO5

IO4/QO4

IO3/QO3

IO2/QO2

IO1/QO1

IO0/QO0

OFFSET 1 LSB =

(VFSP-P / 1023)

-31 LSB

-30 LSB

-29 LSB

100

010

-2 LSB

100

001

-1 LSB

100

000

0mV

0mV (Default)

000

001

1 LSB

000

010

2 LSB

011

101

29 LSB

011

110

30 LSB

011

111

31 LSB

Note: For transmit full-scale select of ±410mV: 1 LSB = (820mVP-P / 1023) = 0.8016mV. For transmit full scale select of ±500mV: 1 LSB =

(1VP-P / 1023) = 0.9775mV.

Table 11. Common-Mode Select

(COMSEL Mode)

CM1

CM0

Tx PATH OUTPUT COMMON MODE (V)

1.36 (Default)

1.20

1.15

0.86

Table 12. WAKEUP-SEL Register

POWER MODE AFTER WAKE-UP

(WAKE-UP STATE)

000

Invalid Value. This value is ignored

when inadvertently written to the

WAKEUP-SEL register.

IDLE

STBY

SPI1-SLOW Rx

SPI2-SLOW Tx

SPI3-FAST Rx

SPI4-FAST Tx

111

FD (Default)

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