Datasheet

PGA309
SBOS292C –DECEMBER 2003–REVISED JANUARY 2011 www.ti.com
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
Output Fine Gain Adjust (Gain DAC)
Range 0.33 to 1 V/V
Resolution 65,536 steps, 16-bit DAC 10 mV/V
Integral Nonlinearity 20 LSB
Differential Nonlinearity 0.5 LSB
Output Amplifier
Offset Voltage (RTI of Output Amplifier)
(4)
3 mV
vs Temperature 5 mV/°C
vs Supply Voltage, V
SA
30 mV/V
Common-Mode Input Range 0 V
S
– 1.5 V
Input Bias Current 100 pA
Amplifier Internal Gain
Gain Range Steps 2, 2.4, 3, 3.6, 4.5, 6, 9 2 to 9 V/V
Initial Gain Error 2, 2.4, 3.6 0.25 ±1 %
4.5 0.3 ±1.2 %
6 0.4 ±1.5 %
9 0.6 ±2.0 %
vs Temperature 2, 2.4, 3.6 5 ppm/°C
4.5 5 ppm/°C
6 15 ppm/°C
9 30 ppm/°C
Output Voltage Range
(5)
R
L
= 10kΩ 0.1 4.9 V
Open-Loop Gain 115 dB
Gain-Bandwidth Product 2 MHz
Phase Margin Gain = 2, C
L
= 200pF 45 deg
Output Resistance AC Small-signal, open-loop, f = 1MHz, I
O
= 0 675 Ω
Over- and Under-Scale Limits V
REF
= 4.096
Over-Scale Thresholds Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘000’ 0.9708
Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘001’ 0.9610
Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘010’ 0.9394
Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘011’ 0.9160
Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘100’ 0.9102
Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘101’ 0.7324
Ratio of V
REF
, Register 5—bits D5, D4, D3 = ‘110’ 0.5528
Over-Scale Comparator Offset +6 +60 +114 mV
Over-Scale Comparator Offset Drift +0.37 mV/°C
Under-Scale Thresholds Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘111’ 0.0605
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘110’ 0.0547
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘101’ 0.0507
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘100’ 0.0449
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘011’ 0.0391
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘010 0.0352
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘001’ 0.0293
Ratio of V
REF
, Register 5—bits D2, D1, D0 = ‘000’ 0.0254
Unde-rScale Comparator Offset −7 −50 +93 mV
Under-Scale Comparator Offset Drift −0.15 mV/°C
(4) RTI = Referred-to-input. RTO = referred to output.
(5) Unless limited by the over/under-scale setting.
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