AD7677AST Analog Devices Inc, AD7677AST Datasheet - Page 16

• Manufacturer Part Number: AD7677AST
• Description: IC ADC 16BIT 1MSPS DIFF 48-LQFP
• Manufacturer: Analog Devices Inc
• Series: PulSAR®r

Specifications of AD7677AST

• Rohs Status: RoHS non-compliant
• Number Of Bits: 16
• Sampling Rate (per Second): 1M
• Data Interface: Serial, Parallel
• Number Of Converters: 1
• Power Dissipation (max): 130mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• For Use With: EVAL-AD7677CBZ - BOARD EVALUATION FOR AD7677

AD7677
The BYTESWAP pin allows a glueless interface to an 8-bit bus.
As shown in Figure 16, the LSB byte is output on D[7:0] and
the MSB is output on D[15:8] when BYTESWAP is low. When
BYTESWAP is high, the LSB and MSB bytes are swapped and
the LSB is output on D[15:8] and the MSB is output on D[7:0].
By connecting BYTESWAP to an address line, the 16 bits of
data can be read in 2 bytes on either D[15:8] or D[7:0].
Figure 18. Master Serial Data Timing for Reading (Read Previous Conversion During Convert)
SDOUT
CS, RD
CNVST
SDOUT
CS, RD
CNVST
BUSY
SYNC
SCLK
BUSY
SYNC
SCLK
t
16
Figure 17. Master Serial Data Timing for Reading (Read After Convert)
t
3
t
t
15
16
t
t
t
EXT/INT = 0
14
15
14
t
29
t
X
17
t
t
22
18
EXT/INT = 0
t
1
t
D15
3
t
X
20
1
t
22
t
19
t
21
t
20
D14
t
D15
23
2
1
t
t
19
18
RDC/SDIN = 1
RDC/SDIN = 0
D14
t
t
3
21
2
23
–16–
t
28
PINS D[15:8]
3
PINS D[7:0]
BYTE
CS
RD
14
D2
INVSCLK = INVSYNC = 0
INVSCLK = INVSYNC = 0
HI-Z
HI-Z
Figure 16. 8-Bit Parallel Interface
14
D2
15
D1
t
15
D1
12
HIGH BYTE
LOW BYTE
16
t
24
t
16
30
D0
t
24
D0
t
12
HIGH BYTE
LOW BYTE
t
t
t
t
t
t
25
26
26
27
25
27
REV. A
HI-Z
HI-Z
t
13