mx7705 Maxim Integrated Products, Inc., mx7705 Datasheet - Page 11

• Manufacturer Part Number: mx7705
• Description: Mx7705 16-bit, Low-power, 2-channel, Sigma-delta Adc
• Manufacturer: Maxim Integrated Products, Inc.

Table 4. Peak-to-Peak Resolution vs. Gain and Output Data Rate (V
(V
BUFFERED (f
UNBUFFERED (f
BUFFERED (f
UNBUFFERED (f
OUTPUT DATA RATE
DD
32776
32774
32772
32770
32768
32766
32764
32762
32760
32758
32756
FILTER FIRST
NOTCH AND
= 3V or 5V, V
0
100Hz
200Hz
100Hz
200Hz
250Hz
500Hz
250Hz
500Hz
20Hz
25Hz
20Hz
25Hz
50Hz
60Hz
50Hz
60Hz
V
V
DD
REF
= 5V,
= 2.5V
400
TYPICAL OUTPUT NOISE
CLKIN
CLKIN
CLKIN
CLKIN
READING NUMBER
REF+
800
______________________________________________________________________________________
= 1MHz)
= 2.4576MHz)
= 1MHz)
= 2.4576MHz)
= 1.225V for V
1200
GAIN = 128
ODR = 60Hz
RMS NOISE = 1.3µV
-3dB FREQUENCY
15.72Hz
15.72Hz
1600
5.24Hz
6.55Hz
26.2Hz
52.4Hz
5.24Hz
6.55Hz
26.2Hz
52.4Hz
13.1Hz
65.5Hz
13.1Hz
65.5Hz
131Hz
131Hz
DD
2000
= 3V, V
400
300
200
100
REF+
0
16-Bit, Low-Power, 2-Channel,
HISTOGRAM OF TYPICAL OUTPUT NOISE
16
16
12
10
16
16
12
10
16
16
12
10
16
16
12
10
V
GAIN = 128
ODR = 60Hz
1
DD
= 2.5V for V
= 5V, V
REF
= 2.5V
16
16
12
10
16
16
12
10
16
16
12
11
16
16
12
10
2
TYPICAL PEAK-TO-PEAK RESOLUTION (BITS)
DD
CODE
= 5V, V
Typical Operating Characteristics
RMS NOISE = 1.3µV
16
16
12
10
16
16
12
10
16
16
12
10
16
16
12
10
4
REF
- = GND, T
16
16
12
10
16
16
12
10
16
16
12
10
16
16
12
10
8
Sigma-Delta ADC
GAIN
-0.0005
-0.0010
-0.0015
A
0.0015
0.0010
0.0005
= +25°C, unless otherwise noted.)
16
15
15
12
10
15
15
12
10
15
15
12
10
15
15
12
10
0
OFFSET ERROR vs. SUPPLY VOLTAGE (3V)
2.70
V
DD
DD
2.85
= 3V
32
14
14
12
10
14
14
14
10
14
14
12
10
14
14
12
10
= 3V)
SUPPLY VOLTAGE (V)
3.00
3.15
64
13
13
12
10
13
13
12
10
13
13
11
10
13
13
11
10
3.30
3.45
128
12
12
11
12
12
11
12
12
11
12
12
11
9
9
9
9
3.60
11