AD676 Analog Devices, AD676 Datasheet - Page 4

• Manufacturer Part Number: AD676
• Description: 16-Bit Parallel 100 kSPS Sampling ADC
• Manufacturer: Analog Devices

Specifications of AD676

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 100kSPS
• Interface: Par
• Analog Input Type: SE-Bip
• Ain Range: Bip (Vref)
• Adc Architecture: SAR
• Pkg Type: DIP

AD676
TIMING SPECIFICATIONS
Parameter
Conversion Time
CLK Period
Calibration Time
Sampling Time (Included in t
CAL to BUSY Delay
BUSY to SAMPLE Delay
SAMPLE to BUSY Delay
CLK HIGH
CLK LOW
SAMPLE LOW to 1st CLK Delay
SAMPLE LOW
Output Delay
Status Delay
CAL HIGH Time
NOTES
1
2
3
4
See the “CONVERSION CONTROL” and “AUTOCALIBRATION” sections for detailed explanations of the above timing.
Depends upon external clock frequency; includes acquisition time and conversion time. The maximum conversion time is specified to account for the droop of the
internal sample/hold function. Longer conversion times may degrade performance. See “General Conversion Guidelines” for additional explanation of maximum con-
version time.
580 ns is recommended for optimal accuracy over temperature.
t
BIT 1 – BIT 16
CH
(OUTPUTS)
(OUTPUT)
+ t
SAMPLE
(INPUT)
(INPUT)
CL
BUSY
CLK
= t
Figure 2a. General Conversion Timing
CLK
4
t
S
3
4
t
SC
and must be greater than 480 ns.
t
BS
2
t
SB
(PREVIOUS CONVERSION)
1
2
t
SL
3
t
CLK
C
)
4
5
t
C
BUSY
(T
t
CAL
CLK
CL
MIN
to T
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
13
C
CLK
CT
S
CALB
BS
SB
CH
CL
SC
SL
OD
SD
CALH
MAX
t
CH
14
V
t
t
CALH
t
CH
CC
15
OD
Figure 1. Calibration Timing
t
= +12 V
CALB
16
t
CL
(NEW DATA)
17
t
t
SD
CLK
t
CT
5%, V
–4–
10
480
2
2
50
50
50
100
50
50
Min
EE
= –12 V
BIT 1 – BIT 16
(OUTPUTS)
(OUTPUT)
SAMPLE
(INPUT)
(INPUT)
BUSY
Figure 2b. Continuous Conversion Timing
CLK
5%, V
t
S
Typ
75
15
125
t
SC
t
BS
t
OD
DD
(PREVIOUS CONVERSION)
t
SB
= +5 V
1
2
t
SL
1000
85,530
150
100
200
Max
3
t
10%, V
CLK
4
5
t
REF
C
t
CL
= 10.0 V)
13
14
1
t
t
Units
ns
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
CH
15
OD
CLK
s
s
s
16
REV. A
(NEW DATA)
17
t
S
t
SD