EVAL-AD7706EB Analog Devices Inc, EVAL-AD7706EB Datasheet - Page 9

• Manufacturer Part Number: EVAL-AD7706EB
• Description: BOARD EVAL FOR AD7706
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7706EB

• Number Of Adc's: 1
• Number Of Bits: 16
• Sampling Rate (per Second): 500
• Data Interface: Serial
• Inputs Per Adc: 3 Differential
• Input Range: 0 ~ 5.25 V
• Power (typ) @ Conditions: 6.5mW @ 500SPS
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD7706
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

REV. A
Figure 4. Typical I
Figure 2. Typical Noise Plot @ Gain = 128 with 50 Hz
Update Rate
Figure 3. Typical I
32771
32770
32769
32768
32767
32766
32765
32764
32763
1.2
1.0
0.8
0.6
0.4
0.2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.4
0
1
UNBUFFERED MODE
f
CLKDIV = 0
BUFFERED MODE
f
CLKDIV = 1
V
V
GAIN = 128
50Hz UPDATE RATE
CLK
CLK
V
EXTERNAL MCLK
CLKDIS = 1
T
DD
REF
A
V
T
DD
0.6
100
A
DD
= +25 C
= 1MHz,
UNBUFFERED MODE, GAIN = 1
= 5MHz,
= 5V
= 3V
= +25 C
= 2.5V
= 3V
2
BUFFERED MODE, GAIN = 1
0.8
200
DD
1.0
300
vs. Gain and Clock Frequency @ 3 V
4
DD
BUFFERED MODE, GAIN = 128
1.2
FREQUENCY – MHz
vs. MCLKIN Frequency @ 3 V
400
READING NO.
8
T
RMS NOISE = 600nV
1.4
A
UNBUFFERED MODE, GAIN = 128
GAIN
500
= +25 C
BUFFERED MODE
f
CLK
1.6
UNBUFFERED MODE
f
CLK
16
600
BUFFERED MODE
f
= 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
f
CLK
CLK
= 2.84MHz, CLKDIV = 0
1.8
= 1MHz, CLKDIV = 0
= 5MHz, CLKDIV = 1
700
2.0
32
Typical Performance Characteristics–
800
2.2
64
900 1000
2.4
2.6
128
–9–
Figure 7. Typical I
Figure 6. Typical I
400
300
200
100
1.2
1.0
0.8
0.6
0.4
0.2
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0
0.4
Figure 5. Histogram of Data in Figure 2
1
UNBUFFERED MODE
f
CLKDIV = 0
BUFFERED MODE
f
CLKDIV = 1
CLK
32764
CLK
V
EXTERNAL MCLK
CLKDIS = 1
T
BUFFERED MODE, GAIN = 1
DD
A
V
T
0.6
UNBUFFERED MODE, GAIN = 1
= +25 C
A
DD
= 1MHz,
= 5MHz,
= 5V
= +25 C
2
= 5V
0.8
32765
BUFFERED MODE, GAIN = 128
DD
1.0
4
vs. Gain and Clock Frequency @ 5 V
DD
32766
1.2
FREQUENCY – MHz
vs. MCLKIN Frequency @ 5 V
8
UNBUFFERED MODE, GAIN = 128
1.4
32767
CODE
GAIN
UNBUFFERED MODE
f
CLK
BUFFERED MODE
f
CLK
1.6
AD7705/AD7706
= 2.4576MHz, CLKDIV = 0
16
BUFFERED MODE
f
= 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
f
CLK
CLK
32768
1.8
= 1MHz, CLKDIV = 0
= 5MHz, CLKDIV = 1
32
2.0
32769
2.2
64
32770
2.4
128
2.6