Datasheet

XTR300
SBOS336C –JUNE 2005– REVISED JUNE 2011 www.ti.com
ELECTRICAL CHARACTERISTICS: INSTRUMENTATION AMPLIFIER (IA)
Boldface limits apply over the specified temperature range: T
A
= –40°C to +85°C.
All specifications at T
A
= +25°C, V
S
= ±20V, R
IA
= 2kΩ, and R
GAIN
= 2kΩ, unless otherwise noted. See Figure 4.
XTR300
PARAMETER CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
Offset Voltage, RTI V
OS
I
DRV
= 0A ±0.7 ±2.7 mV
vs Temperature dV
OS
/dT ±2.4 ±10 μV/°C
vs Power Supply PSRR V
S
= ±5V to ±22V ±0.8 ±10 μV/V
INPUT VOLTAGE RANGE
Input Voltage Range V
CM
(V−) + 3 (V+) − 3 V
Common-Mode Rejection Ratio CMRR RTI 100 130 dB
INPUT BIAS CURRENT
Input Bias Current I
B
±20 ±35 nA
Input Offset Current I
OS
±1 ±10 nA
INPUT IMPEDANCE
Differential Ω || pF
10
5
|| 5
Common-Mode Ω || pF
10
5
|| 5
TRANSCONDUCTANCE (Gain) IA
OUT
= 2 (IA
IN+
− IA
IN−
)/R
GAIN
IA
OUT
= ±2.4mA, (V−) + 3V < V
IAOUT
< (V+) −
Transconductance Error ±0.04 ±0.1 %/FS
3V
vs Temperature ±0.2 ppm/°C
Linearity Error (V−) + 3V < V
IAOUT
< (V+) − 3V ±0.01 ±0.1 %FS
Input Bias Current to G1, G2 ±20 nA
Input Offset Current to G1, G2
(1)
±1 nA
OUTPUT
Output Swing to the Rail IA
OUT
= ±2.4mA (V−) + 3 (V+) − 3 V
Output Impedance IA
OUT
= ±2.4mA 600 mΩ
Short-Circuit Current I
LIMIT
M2 = High ±7.2 mA
I
LIMIT
M2 = Low ±4.5 mA
FREQUENCY RESPONSE
Gain-Bandwidth Product GBW G = 1, R
GAIN
= 10kΩ, R
IA
= 5kΩ 1 MHz
Slew Rate SR G = 1, R
GAIN
= 10kΩ, R
IA
= 5kΩ 1 V/μs
IA
OUT
= ±40μA, R
GAIN
= 10kΩ, R
IA
= 5kΩ, C
L
=
Settling Time
(2)
, 0.1% 6 μs
100pF
Overload Recovery Time, 50% R
GAIN
= 10kΩ, R
IA
= 15kΩ, C
L
= 100pF 10 μs
(1) See Typical Characteristics curve (Figure 7).
(2) 6μs plus number of chopping periods. See Applications Information, Internal Current Sources and Settling Time section.
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