V 10%; DVDD1 = DVDD2
AD7729–SPECIFICATIONS
1
(AVDD1T==AVDD2to=T+3 unless otherwise noted) = +3 V
0 V, f = 13 MHz; RxPOWER1 = 0; RxPOWER0 = 1; MCLKDIV = 0;
T
CLK
A
MIN
MAX
10%; DGND = AGND =
Parameter
REFERENCE
REFCAP
Absolute Voltage, V
REFCAP
REFCAP TC
REFOUT
Absolute Voltage, V
REFOUT
REFOUT TC
ADC CHANNEL SPECIFICATIONS
Resolution
ADC Signal Range
V
BIAS
Differential Signal Range
Single-Ended Signal Range
Input Sample Rate
Output Word Rate
DC Accuracy
Precalibration Offset Error
Post Calibration Offset Error
Post Calibration Offset Error TC
Input Resistance (DC)
Input Capacitance
Dynamic Specifications
Dynamic Range
Signal to (Noise + Distortion)
Gain Error
Gain Match Between Channels
Filter Settling Time
Frequency Response
0 kHz–70 kHz
85 kHz
96 kHz
135 kHz
>170 kHz
Absolute Group Delay
Group Delay Between Channels
(0 kHz–96 kHz)
Coding
AUXILIARY CONVERTER
2
Resolution
Output Range
Code 000
Offset Error
Code 3FF
Gain Error
DC Accuracy
Integral Nonlinearity
Differential Nonlinearity
Update Rate
Load Resistance
Load Capacitance
I
SINK
Full-Scale Settling Time
LSB Settling Time
Coding
AD7729A
Units
Test Conditions/Comments
1.3
±
5%
50
1.3
±
10%
50
15
2 V
REFCAP
V
REFCAP
/2 to (AVDD – V
REFCAP
/2)
V
REFCAP
to (AVDD – V
REFCAP
)
V
BIAS
±
V
REFCAP
/2
V
BIAS
±
V
REFCAP
13
270.83
±
45
±
10
50
1.23
10
67
64
±
1
±
0.5
±
0.2
47
±
0.05
–1
–3.0
–55
–55
23
5
Twos Complement
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
µV/°C
typ
MΩ typ
pF typ
dB typ
dB min
dB max
dB max
dB max
µs
typ
dB max/min
dB max
dB max
dB max
dB max
µs
typ
ns typ
0.1
µF
Capacitor Required from REFCAP to AGND
0.1
µF
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
BIAS
TC = Temperature Coefficient
Input Frequency = 67.7 kHz
Input Frequency = 67.7 kHz, wrt 1.3 V
Input Frequency = 67.7 kHz, wrt V
REFCAP
Does Not Include Input Antialias RC Circuit
10
2/32
×
V
REFCAP
±
35
2 V
REFCAP
–60
+100
Bits
V
mV max
V
mV min
mV max
Maximum Output for Specified Accuracy = AVDD –
0.2 V or 2.6 V, Whichever Is Lower
±
4
±
2
540
10
50
50
4
2
Binary
LSB max
LSB max
kHz max
kΩ min
pF max
µA
typ
µs
typ
µs
typ
Guaranteed Monotonic to 9 Bits
See Figure 1
See Figure 1
–2–
REV. 0
AD [ ANALOG DEVICES ]
