AD7729 Analog Devices, AD7729 Datasheet - Page 3

• Manufacturer Part Number: AD7729
• Description: 3 V, Dual Sigma-Delta ADC with Auxiliary DAC
• Manufacturer: Analog Devices

Specifications of AD7729

• Resolution (bits): 15bit
• # Chan: 2
• Sample Rate: 13MSPS
• Interface: Ser
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOIC,SOP

Parameter
LOGIC INPUTS
LOGIC OUTPUTS
POWER SUPPLIES
NOTES
1
2
Specifications subject to change without notice.
Conditions
ADCs On Only
AUXDAC On Only
REFCAP On Only
REFCAP and
All Sections Off
All Sections Off
The above values are in mA.
REV. 0
Operating Temperature Range: –40 C to +105 C. Therefore, T
During power-down, the AUXDAC has an output resistance of 30 k
REFOUT On Only
V
V
I
C
V
V
I
I
AVDD1, AVDD2
DVDD1, DVDD2
I
IH
OZL
OZH
DD
INH
INL
IN
OH
OL
, Input Current
, Input Capacitance
, Output Low Voltage
, Output High Voltage
, Low Level Output Three-State Leakage Current
, Input Low Voltage
, High Level Output Three-State Leakage Current
, Input High Voltage
Table I. Current Summary (AVDD1 = AVDD2 = DVDD1 = DVDD2 = +3.3 V, RxPOWER1 = 0, RxPOWER0 = 1)
Analog Digital
Current Current Current
(typ)
4.2
2
0.7
1
0.0001
0.0001
Internal External
(typ)
3.4
0.86
0.0001
0.0001
0.04
0.0001
Interface Total
(typ)
4
0.1
0.002
0.002
0.015
0.005
Figure 1. AUXDAC Load Equivalent Circuit
Current
(max)
13.5
3.4
1.1
1.7
0.1
0.05
MIN
AD7729A
V
0.8
10
10
V
0.4
10
10
2.7/3.3
2.7/3.3
50pF
= –40 C and T
DD
DD
C
approximately to AGND.
L
– 0.8
– 0.4
BSE
1
0
0
0
0
0
–3–
MAX
= +105 C.
R
10k
ASE
0
1
0
0
0
0
L
Units
V min
V max
pF max
V min
V max
V min/max
V min/max
A max
A max
A max
MCLK
ON
YES
YES
NO
NO
YES
NO
REFOUT Enabled, BSCLK = MCLK
REFOUT Disabled, ASCLK = MCLK/48
REFOUT Disabled
REFOUT Enabled
MCLK Active Levels Equal to 0 V and DVDD
Digital Inputs Static and Equal to 0 V or
DVDD
Comments
Test Conditions/Comments
|I
|I
See Table I
OUT
OUT
| < 100 A
| < 100 A
AD7729