MSC1210_14 Datasheet, PDF (17/95 Pages) Texas Instruments – Precision Analog-to-Digital Converter (ADC) with 8051 Microcontroller and Flash Memory

MSC1210
www.ti.com
SBAS203J − MARCH 2002 − REVISED JANUARY 2008
TYPICAL CHARACTERISTICS (Continued)
AV_DD = +5V, DV_DD = +5V, f_OSC = 8MHz, PGA = 1, f_MOD = 15.625Hz, Bipolar, Buffer ON, and V_REF = (REF IN+) − (REF IN−) = +2.5V, unless otherwise specified.
INTEGRAL NONLINEARITY vs INPUT SIGNAL
10
8
6
−40_ C
4
2
+85_C
0
−2
+25_ C
−4
−6
−8
−10
−2.5 −2 −1.5 −1 −0.5 0 0.5 1 1.5 2 2.5
V_IN (V)
INTEGRAL NONLINEARITY vs INPUT SIGNAL
30
V_REF = AV_DD, Buffer OFF
20
10
0
−10
−20
−30
V_IN = −V_REF
0
V_IN (V)
V_IN = +V_REF
ADC INTEGRAL NONLINEARITY vs V_REF
35
Buffer OFF
30
AV_DD = 3V
25
20
AV_DD = 5V
15
10
5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_REF (V)
INL ERROR vs PGA
100
90
80
70
60
50
40
30
20
10
0
1
2
4
8
16
32
64 128
PGA Setting
MAXIMUM ANALOG SUPPLY CURRENT
1.6
1.5
PGA = 128
ADC ON
1.4 _{Brownout Detect ON}
1.3
+85_ C
+25_C
1.2
−40_ C
1.1
1.0
0.9
0.8
0.7
0.6
0.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Analog Supply Voltage (V)
ADC CURRENT vs PGA
900
AV_DD = 5V, Buffer = ON
800
Buffer = OFF
700
600
500
AV_DD = 3V, Buffer = ON
400
Buffer = OFF
300
200
100
0
0
1
2
4
8 16 32 64 128
PGA Setting
17