AD7729 Analog Devices, AD7729 Datasheet - Page 2

• 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

0 V, f
AD7729–SPECIFICATIONS
Parameter
REFERENCE
ADC CHANNEL SPECIFICATIONS
AUXILIARY CONVERTER
REFCAP
REFOUT
Resolution
ADC Signal Range
V
Differential Signal Range
Single-Ended Signal Range
Input Sample Rate
Output Word Rate
DC Accuracy
Input Resistance (DC)
Input Capacitance
Dynamic Specifications
Gain Error
Gain Match Between Channels
Filter Settling Time
Frequency Response
Absolute Group Delay
Group Delay Between Channels
Coding
Resolution
Output Range
DC Accuracy
Update Rate
Load Resistance
Load Capacitance
I
Full-Scale Settling Time
LSB Settling Time
Coding
SINK
BIAS
CLK
Absolute Voltage, V
REFCAP TC
Absolute Voltage, V
REFOUT TC
Precalibration Offset Error
Post Calibration Offset Error
Post Calibration Offset Error TC
Dynamic Range
Signal to (Noise + Distortion)
0 kHz–70 kHz
85 kHz
96 kHz
135 kHz
>170 kHz
(0 kHz–96 kHz)
Code 000
Code 3FF
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Gain Error
= 13 MHz; RxPOWER1 = 0; RxPOWER0 = 1; MCLKDIV = 0; T
REFCAP
REFOUT
2
AD7729A
1.3
50
1.3
50
15
2 V
V
V
V
V
13
270.83
50
1.23
10
67
64
47
–1
–3.0
–55
–55
23
5
Twos Complement
10
2/32
2 V
–60
+100
540
10
50
50
4
2
Binary
45
10
1
0.5
0.2
0.05
35
4
2
REFCAP
REFCAP
BIAS
BIAS
REFCAP
REFCAP
5%
10%
V
/2 to (AVDD – V
V
V
to (AVDD – V
REFCAP
REFCAP
REFCAP
/2
1
(AVDD1 = AVDD2 = +3 V
REFCAP
REFCAP
)
A
/2)
= T
–2–
MIN
to T
Units
V min/max
ppm/ C typ
V min/max
ppm/ C typ
Bits
V p-p
Volts
Volts
V min/max
V min/max
MSPS
kHz
mV typ
mV max
M typ
pF typ
dB typ
dB min
dB max
dB max
dB max
dB max/min
dB max
dB max
dB max
dB max
ns typ
Bits
V
mV max
V
mV min
mV max
LSB max
LSB max
kHz max
k min
pF max
V/ C typ
s typ
s typ
A typ
s typ
s typ
MAX
unless otherwise noted)
10%; DVDD1 = DVDD2 = +3 V
Test Conditions/Comments
0.1 F Capacitor Required from REFCAP to AGND
0.1 F Capacitor Required from REFOUT to AGND
RxON = 1
Differential
Single-Ended
For Both Positive and Negative Analog Inputs
For Positive Analog Inputs; Negative Analog Inputs = V
TC = Temperature Coefficient
Input Frequency = 67.7 kHz
Input Frequency = 67.7 kHz, wrt 1.3 V
Input Frequency = 67.7 kHz, wrt V
Does Not Include Input Antialias RC Circuit
Maximum Output for Specified Accuracy = AVDD –
0.2 V or 2.6 V, Whichever Is Lower
Guaranteed Monotonic to 9 Bits
See Figure 1
See Figure 1
10%; DGND = AGND =
REFCAP
REV. 0
BIAS