PGA900 Datasheet, PDF (15/137 Pages) Texas Instruments – PGA900 Programmable Resistive Sensing Conditioner with Digital and Analog Outputs

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6.22 DAC Gain
over operating free-air temperature range at V_DD = 5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
2X
Buffer gain (see Figure 3)
4X
6.67X
10X
Current loop gain
Gain bandwidth product⁽¹⁾
Offset error
Gain = 4X, ratiometric output
measured at VOUT
Gain error
Gain = 4X, ratiometric output
measured at VOUT
Ratiometric error
For ratiometric applications, across
temperature
Current mode output
Total unadjusted error
Includes offset error, gain error and
INL across temperature
Voltage mode output
Includes offset error, gain error and
INL across temperature
DAC gain noise
ƒ = 10 Hz to 1 kHz, V_DD = 4.5 V,
ratiometric mode, gain = 4 V/V, no
capacitors for COMP or DACCAP
pins, 25°C
Settling time (first order response)⁽¹⁾
Zero code voltage (Gain = 4X)
Full code voltage (Gain = 4X)
DAC code 0000h to 1FFFh step.
Output is 90% of full scale. R_LOAD =
5 kΩ, C_LOAD = 500 pF
DAC code = 0000h, I_DAC = -2.5 mA
Output when DAC code is 1FFFh,
I_DAC = 2.5 mA
Gain = 2X
Absolute mode voltage half code
temperature drift, I_DAC = 2.5 mA⁽²⁾
Gain = 4X
Gain = 6.67X
Gain = 10X
Ratiometric mode voltage half code
temperature drift, Gain = 4X⁽²⁾
Output current
No load
I_DAC = 1.25 mA
DAC code = 1FFFh , DAC code =
0000h
Short circuit source current
DAC code = 0000h
Short circuit sink current
DAC code = 1FFFh
Max capacitance
Without compensation
With compensation
(1) Specified by design
TEMP DRIFT  ^{9DOXH DW 7(03 ± 9DOXH DW G&} K 10⁶
(2)
Value at 25GC K TEMP
PGA900
SLDS209A – JANUARY 2015 – REVISED MAY 2015
MIN
TYP
MAX UNIT
2
4
V/V
6.67
10
1001
mA/mA
1
MHz
±13
mV
±0.3
%FSR
±0.1 %FSO
3.5
%FSO
0.15
%FSO
10
uVpp
7
µs
20 mV
4.8
V
6
25
6
26.5
ppm/°C
6
28.5
7
30
21.5
38
ppm/°C
30.5
49.5
±2.5 mA
27
mA
27
mA
100
pF
100
nF
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