PGA309_11 Datasheet, PDF (6/24 Pages) Texas Instruments – Voltage Output Programmable Sensor Conditioner

PGA309
SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011
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ELECTRICAL CHARACTERISTICS (continued)
Boldface limits apply over the specified temperature range, T_A = –40°C to +125°C.
At T_A = +25°C, V_SA= V_SD = +5V (V_SA = V_{SUPPLY ANALOG}, V_SD = V_{SUPPLY DIGITAL}; V_SA must equal V_SD), GND_D = GND_A = 0, and V_REF
= REF_IN/REF_OUT = +5V, unless otherwise noted.
PGA309
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Temperature ADC. continued
xx Offset vs V_SA
xx Gain Error
G_PGA = 1
G_PGA = 2
G_PGA = 4
G_PGA = 8
800
mV/V
400
mV/V
200
mV/V
150
mV/V
0.05
0.50
%
xx Gain Error Drift
5
50
ppm/°C
xx Noise
All gains
<1
LSB
xx Gain vs V_SA
xx Common-Mode Rejection
Temp ADC Ext. REF (V_REFT = V_REF, V_EXC, or V_SA)
xx Full-Scale Input Voltage
xx Differential Input Impedance
xx Common-Mode Input Impedance
xx Resolution
At dc and G_PGA = 8
At dc and G_PGA = 1
Register 6, bit D8 = 0
(+Input) − (−Input)
G_PGA = 1
G_PGA = 2
G_PGA = 4
G_PGA = 8
R1, R0 = ‘00’, ADC2X = ‘0’, conversion time = 6ms
80
105
100
±V_REFT/G_PGA
2.4/G_PGA
8
8
8
8
11
ppm/V
dB
dB
V
MΩ
MΩ
MΩ
MΩ
MΩ
Bits + Sign
R1, R0 = ‘01’, ADC2X = ‘0’, conversion time = 24ms
13
Bits + Sign
R1, R0 = ‘10’, ADC2X = ‘0’, conversion time = 50ms
14
Bits + Sign
R1, R0 = ‘11’, ADC2X = ‘0’, conversion time = 100ms
15
Bits + Sign
xx Integral Nonlinearity
0.01
%
xx Offset Error
xx Offset Drift
xx Gain Error
G_PGA = 1
G_PGA = 2
G_PGA = 4
G_PGA = 8
G_PGA = 1
G_PGA = 2
G_PGA = 4
G_PGA = 8
2.5
mV
1.25
mV
0.7
mV
0.3
mV
1.5
mV/°C
1.0
mV/°C
0.7
mV/°C
0.6
mV/°C
−0.2
%
xx Gain Error Drift
2
ppm/°C
xx Gain vs V_SA
xx Common-Mode Rejection
External Temperature Current Excitation I_TEMP
xx Current Excitation
At dc and G_PGA = 8
At dc and G_PGA = 1
Register 6, bit D11 = 1
80
100
85
5.8
7
ppm/V
dB
dB
8
mA
xx Temperature Drift
5
nA/°C
xx Voltage Compliance
V_SA −1.2
V
6
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