Rainbow Electronics MAX1035 - Manual (Page 9)

MAX1034/MAX1035
8-/4-Channel, ±V
REF
Multirange Inputs,
Serial 14-Bit ADCs
_______________________________________________________________________________________ 9
EXTERNAL REFERENCE INPUT CURRENT
vs. EXTERNAL REFERENCE INPUT VOLTAGE
MAX1034/35 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
MAX1034/35 toc13
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
MAX1034/35 toc14
TEMPERATURE ( °C)
OFFSET ERROR (mV)
+V
REF
/4 BIPOLAR RANGE
±V
REF BIPOLAR
CHANNEL-TO-CHANNEL ISOLATION
vs. INPUT FREQUENCY
MAX1034/35 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
MAX1034/35 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
1.0
0.5
0
-0.5
-1.0
0 8192 4096 12,288 16,383
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX1034/35 toc17
DIGITAL OUTPUT CODE
INL (LSB)
f
SAMPLE
= 115ksps
±V
REF BIPOLAR RANGE
1.0
0.5
0
-0.5
-1.0
0 8192 4096 12,288 16,383
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX1034/35 toc18
DIGITAL OUTPUT CODE
DNL (LSB)
f SAMPLE = 115ksps
±V
REF BIPOLAR RANGE
-140
-100
-120
-60
-80
-20
-40
0
0 20 30 10 40 50
FFT AT 5kHz
MAX1034/35 toc19
FREQUENCY (kHz)
MAGNITUDE (dB)
f SAMPLE = 115ksps
f IN(SINE WAVE) = 5kHz
±V
REF BIPOLAR RANGE
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.)