Multirange inputs, serial 16-bit adcs, Typical operating characteristics (continued) – Rainbow Electronics MAX1303 User Manual
Page 9
MAX1302/MAX1303
8-/4-Channel, ±V
REF
Multirange Inputs,
Serial 16-Bit ADCs
_______________________________________________________________________________________
9
EXTERNAL REFERENCE INPUT CURRENT
vs. EXTERNAL REFERENCE INPUT VOLTAGE
MAX1302/03 toc12
EXTERNAL REFERENCE VOLTAGE (V)
EXTERNAL REFERENCE CURRENT (mA)
4.10
4.05
4.00
3.95
3.90
3.85
0.13
0.14
0.15
0.16
0.12
3.80
4.15
ALL MODES
-0.10
-0.04
-0.06
-0.08
-0.02
0
0.02
0.04
0.06
0.08
0.10
-40
10
-15
35
60
85
GAIN DRIFT
vs. TEMPERATURE
MAX1302toc13
TEMPERATURE (
°C)
GAIN DRIFT (%)
+V
REF
/2 BIPOLAR
±V
REF
BIPOLAR RANGE
±V
REF
/4 BIPOLAR
-1.0
-0.4
-0.6
-0.8
-0.2
0
0.2
0.4
0.6
0.8
1.0
-40
10
-15
35
60
85
OFFSET DRIFT
vs. TEMPERATURE
MAX1302toc14
TEMPERATURE (
°C)
OFFSET ERROR (mV)
+V
REF
/4 BIPOLAR RANGE
±V
REF
BIPOLAR
CHANNEL-TO-CHANNEL ISOLATION
vs. INPUT FREQUENCY
MAX1302/03 toc15
FREQUENCY (kHz)
ISOLATION (dB)
1000
100
10
-100
-80
-60
-40
-20
0
-120
1
10,000
f
SAMPLE
= 115ksps
±V
REF
BIPOLAR RANGE
CH0 TO CH2
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX1302/03 toc16
FREQUENCY (kHz)
CMRR (dB)
1000
100
10
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
1
10,000
f
SAMPLE
= 115ksps
±V
REF
BIPOLAR RANGE
-2.0
-1.0
-1.5
0
-0.5
0.5
1.0
1.5
2.0
0
16,384
32,768
49,152
65,535
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX1302toc17
DIGITAL OUTPUT CODE
INL (LSB)
f
SAMPLE
= 115ksps
±V
REF
BIPOLAR RANGE
-2.0
-1.0
-1.5
0
-0.5
0.5
1.0
1.5
2.0
0
16,384
32,768
49,152
65,535
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX1302toc18
DIGITAL OUTPUT CODE
DNL (LSB)
f
SAMPLE
= 115ksps
±V
REF
BIPOLAR RANGE
-140
-60
-100
-120
-40
-80
-20
0
0
20
10
30
40
50
FFT AT 5kHz
MAX1302toc19
TEMPERATURE (
°C)
MAGNITUDE (dB)
f
SAMPLE
= 115ksps
f
IN(SINE WAVE)
= 5kHz
±V
REF
BIPOLAR RANGE
100
0
1
100
1000
SNR, SINAD, ENOB
vs. ANALOG INPUT FREQUENCY
30
70
40
80
50
90
20
10
60
MAX1302/03 toc20
FREQUENCY (kHz)
SNR, SINAD (dB)
10
f
SAMPLE
= 115ksps
±V
REF
BIPOLAR RANGE
ENOB
SNR
SINAD
Typical Operating Characteristics (continued)
(AV
DD1
= AV
DD2
= DV
DD
= DV
DDO
= 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, f
CLK
= 3.5MHz (50% duty cycle),
external clock mode, V
REF
= 4.096V (external reference operation), REFCAP = AV
DD1
, maximum single-ended bipolar input range
(±V
REF
), C
DOUT
= 50pF, C
SSTRB
= 50pF; unless otherwise noted.)