Datasheet

PGA309
SBOS292C DECEMBER 2003REVISED 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
G
PGA
= 1 800 mV/V
G
PGA
= 2 400 mV/V
G
PGA
= 4 200 mV/V
G
PGA
= 8 150 mV/V
xx Gain Error 0.05 0.50 %
xx Gain Error Drift 5 50 ppm/°C
xx Noise All gains < 1 LSB
xx Gain vs V
SA
80 ppm/V
xx Common-Mode Rejection At dc and G
PGA
= 8 105 dB
At dc and G
PGA
= 1 100 dB
Temp ADC Ext. REF (V
REFT
= V
REF
, V
EXC
, or V
SA
) Register 6, bit D8 = 0
xx Full-Scale Input Voltage (+Input) (Input) ±V
REFT
/G
PGA
V
xx Differential Input Impedance 2.4/G
PGA
MΩ
xx Common-Mode Input Impedance G
PGA
= 1 8 MΩ
G
PGA
= 2 8 MΩ
G
PGA
= 4 8 MΩ
G
PGA
= 8 8 MΩ
xx Resolution R1, R0 = ‘00’, ADC2X = ‘0’, conversion time = 6ms 11 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 G
PGA
= 1 2.5 mV
G
PGA
= 2 1.25 mV
G
PGA
= 4 0.7 mV
G
PGA
= 8 0.3 mV
xx Offset Drift G
PGA
= 1 1.5 mV/°C
G
PGA
= 2 1.0 mV/°C
G
PGA
= 4 0.7 mV/°C
G
PGA
= 8 0.6 mV/°C
xx Gain Error 0.2 %
xx Gain Error Drift 2 ppm/°C
xx Gain vs V
SA
80 ppm/V
xx Common-Mode Rejection At dc and G
PGA
= 8 100 dB
At dc and G
PGA
= 1 85 dB
External Temperature Current Excitation I
TEMP
Register 6, bit D11 = 1
xx Current Excitation 5.8 7 8 mA
xx Temperature Drift 5 nA/°C
xx Voltage Compliance V
SA
1.2 V
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