AD7763 Datasheet, PDF (22/32 Pages) Analog Devices – 24-Bit, 625 kSPS, 109 dB Σ-Δ ADC with On-Chip Buffers, Serial Interface

AD7763
DECOUPLING AND LAYOUT RECOMMENDATIONS
Due to the high performance nature of the AD7763, correct decoupling and layout techniques are required to obtain the performance as
stated within this data sheet. Figure 35 shows a simplified connection diagram for the AD7763.
INA+
INA–
OUTA–
OUTA+
C7
100nF
C64
33pF
VIN+
VIN–
VREF
R19
160kΩ
19
20 ^VINA+
21 ^VINA–
22 ^VOUTA–
V_OUTA+
8
30 ^DECAPA
DECAPB
25
26 ^VIN+
V_IN–
10
9 ^VREF+
REFGND
17
1 ^RBIAS
35 ^DGND
42 ^DGND
43 ^DGND
53 ^DGND
57 ^DGND
59 ^DGND
62 ^DGND
64 ^DGND
DGND
AD7763BSV
U2
61
I²S ₆₀
SCR ₅₈
CDIV
56
FSO ₅₅
SCO ₅₄
SDO
52
SDI ₅₁
FSI
50
SDL ₄₉
SCP
48
ADR0 ₄₇
ADR1 ₄₆
ADR2
45
SH0 ₄₀
SH1 ₃₉
SH2
37
RESET ₃₆
SYNC ₃₈
DRDY
3
MCLK ₂
MCLKGND
I²S
SCR
CDIV
FSO
SCO
SDO
SDI
FSI
SDL
SCP
ADR0
ADR1
ADR2
SH0
SH1
SH2
RESET
SYNC
DRDY
MCLK
AV_DD2
L1
PIN 4
(RHS)
L3
PIN 15
(VBIAS)
L2
PIN 14
(LHS)
C48
100nF
C50
100nF
C62
100nF
AV_DD4
PIN 12
(VBUF)
L4
L9 PIN 27
R38
10Ω
C59
10nF
AV_DD1
L5
L11
PIN 5
(VMOD1)
PIN 33
(VMOD2)
C52
100nF
C53
100nF
AV_DD3
L6
PIN 24
(VDIF1)
C54
100nF
V_DRIVE
L7
PIN 44
(VDRV1)
L12
PIN 63
(VDRV2)
C56
100nF
C57
100nF
DV_DD
L8
PIN 41
(DVDD)
C58
100nF
Figure 35. Simplified Connection Diagram
Rev. 0 | Page 22 of 32