PGA112_0811 Datasheet, PDF (3/47 Pages) Texas Instruments – Zerø-Drift PROGRAMMABLE GAIN AMPLIFIER with MUX

PGA112, PGA113
PGA116, PGA117
www.ti.com ............................................................................................................................................ SBOS424B – MARCH 2008 – REVISED SEPTEMBER 2008
ELECTRICAL CHARACTERISTICS: V_S = AV_DD = DV_DD = +5V
Boldface limits apply over the specified temperature range, T_A = –40°C to +125°C.
At T_A = +25°C, R_L = 10kΩ//C_L = 100pF connected to DV_DD/2, and V_REF = GND, unless otherwise noted.
PGA112, PGA113, PGA116, PGA117
PARAMETER
CONDITIONS
MIN
TYP
MAX
OFFSET VOLTAGE
Input Offset Voltage
vs Temperature, –40°C to +125°C
vs Temperature, –40°C to +85°C
vs Temperature, –40°C to +125°C
vs Temperature, –40°C to +85°C
vs Power Supply
Over Temperature, –40°C to +125°C
INPUT ON-CHANNEL CURRENT
V_OS
dV_OS/dT
PSRR
AV_DD = DV_DD = +5V, V_REF = V_IN = AV_DD/2, V_CM = 2.5V
AV_DD = DV_DD = +5V, V_REF = V_IN = AV_DD/2, V_CM = 4.5V
AV_DD = DV_DD = +5V, V_CM = 2.5V
AV_DD = DV_DD = +5V, V_CM = 2.5V
AV_DD = DV_DD = +5V, V_CM = 4.5V
AV_DD = DV_DD = +5V, V_CM = 4.5V
AV_DD = DV_DD = +2.2V to +5.5V, V_CM = 0.5V,
V_REF = V_IN = AV_DD/2
AV_DD = DV_DD = +2.2V to +5.5V, V_CM = 0.5V,
V_REF = V_IN = AV_DD/2
±25
±100
±75
±325
0.35
1.2
0.15
0.9
0.6
1.8
0.3
1.3
5
20
5
40
Input On-Channel Current (Ch0, Ch1)
I_IN
Over Temperature, –40°C to +125°C
INPUT VOLTAGE RANGE
Input Voltage Range⁽¹⁾
I_VR
Overvoltage Input Range
INPUT IMPEDANCE (Channel On)⁽³⁾
V_REF = V_IN = AV_DD/2
V_REF = V_IN = AV_DD/2
No Output Phase Reversal⁽²⁾
±1.5
±5
See Typical Characteristics
GND – 0.1
GND – 0.3
AV_DD + 0.1
AV_DD + 0.3
Channel Input Capacitance
C_CH
2
Channel Switch Resistance
R_SW
150
Amplifier Input Capacitance
C_AMP
3
Amplifier Input Resistance
R_AMP
Input Resistance to GND
10
V_CAL/CH0
R_IN
CAL1 or CAL2 Selected
100
GAIN SELECTIONS
Nominal Gains
Binary gains: 1, 2, 4, 8, 16, 32, 64, 128
1
128
Scope gains: 1, 2, 5, 10, 20, 50, 100, 200
1
200
DC Gain Error
DC Gain Drift
CAL2 DC Gain Error⁽⁴⁾
CAL2 DC Gain Drift⁽⁴⁾
CAL3 DC Gain Error⁽⁴⁾
CAL3 DC Gain Drift⁽⁴⁾
INPUT IMPEDANCE (Channel Off)⁽³⁾
G=1
1 < G ≤ 32
G ≥ 50
G=1
1 < G ≤ 32
G ≥ 50
V_OUT = GND + 85mV to DV_DD – 85mV
V_OUT = GND + 85mV to DV_DD – 85mV
V_OUT = GND + 85mV to DV_DD – 85mV
V_OUT = GND + 85mV to DV_DD – 85mV
V_OUT = GND + 85mV to DV_DD – 85mV
V_OUT = GND + 85mV to DV_DD – 85mV
Op Amp + Input = 0.9V_CAL,
V_REF = V_CAL = AV_DD/2, G = 1
Op Amp + Input = 0.9V_CAL,
V_REF = V_CAL = AV_DD/2, G = 1
Op Amp + Input = 0.1V_CAL,
V_REF = V_CAL = AV_DD/2, G = 1
Op Amp + Input = 0.1V_CAL,
V_REF = V_CAL = AV_DD/2, G = 1
0.006
0.1
0.1
0.3
0.5
2
6
0.02
2
0.02
2
Input Impedance
C_CH
See Figure 1
2
INPUT OFF-CHANNEL CURRENT
Input Off-Channel Current (Ch0, Ch1)⁽⁵⁾
I_LKG
Over Temperature, –40°C to +125°C
Channel-to-Channel Crosstalk
V_REF = GND, V_OFF-CHANNEL = AV_DD/2,
V_ON-CHANNEL = AV_DD/2 – 0.1V
V_REF = GND, V_OFF-CHANNEL = AV_DD/2,
V_ON-CHANNEL = AV_DD/2 – 0.1V
±0.05
±1
See Typical Characteristics
130
UNIT
µV
µV
µV/°C
µV/°C
µV/°C
µV/°C
µV/V
µV/V
nA
nA
V
V
pF
Ω
pF
GΩ
kΩ
%
%
%
ppm/°C
ppm/°C
ppm/°C
%
ppm/°C
%
ppm/°C
pF
nA
dB
(1) Gain error is a function of the input voltage. Gain error outside of the range (GND + 85mV ≤ V_OUT ≤ DV_DD – 85mV) increases to 0.5%
(typical).
(2) Input voltages beyond this range must be current limited to < |10mA| through the input protection diodes on each channel to prevent
permanent destruction of the device.
(3) See Figure 1.
(4) Total V_OUT error must be computed using input offset voltage error multiplied by gain. Includes op amp G = 1 error.
(5) Maximum specification limitation limited by final test time and capability.
Copyright © 2008, Texas Instruments Incorporated
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