Datasheet

2
®
INA121
SPECIFICATIONS: V
S
= ±15V
At T
A
= +25°C, V
S
= ±15V, R
L
= 10kΩ, and IA reference = 0V, unless otherwise noted.
✻ Specification same as INA121P, U.
NOTE: (1) Temperature coefficient of the “Internal Resistor” in the gain equation. Does not include TCR of gain-setting resistor, R
G
.
INA121P, U INA121PA, UA
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
INPUT
Offset Voltage, RTI ±200±200/G ±500±500/G ±300±200/G
±1000±1000/G µV
vs Temperature ±2±2/G ±5±20/G ✻ ±15±20/G µV/°C
vs Power Supply V
S
= ±2.25V to ±18V ±5±20/G ±50±150/G ✻✻µV/V
Long-Term Stability ±0.5 ✻ µV/mo
Impedance, Differential 10
12
|| 1 ✻ Ω || pF
Common-Mode V
O
= 0V 10
12
|| 12 ✻ Ω || pF
Input Voltage Range See Text and Typical Curves ✻
Safe Input Voltage ±40 ✻ V
Common-Mode Rejection V
CM
= –12.5V to 13.5V
G = 1 78 86 72 ✻ dB
G = 10 91 100 85 ✻ dB
G = 100 96 106 90 ✻ dB
G = 1000 106 ✻ dB
BIAS CURRENT V
CM
= 0V ±4 ±50 ✻✻pA
vs Temperature See Typical Curve ✻
Offset Current ±0.5 ✻ pA
vs Temperature See Typical Curve ✻
NOISE, RTI R
S
= 0Ω
Voltage Noise: f = 10Hz G = 100 30 ✻ nV/√Hz
f = 100Hz G = 100 21 ✻ nV/√Hz
f = 1kHz G = 100 20 ✻ nV/√Hz
f
= 0.1Hz to 10Hz G = 100 1 ✻ µVp-p
Current Noise: f = 1kHz 1 ✻ fA/√Hz
GAIN
Gain Equation 1 + (50kΩ/R
G
) ✻ V/V
Range of Gain 1 10,000 ✻✻V/V
Gain Error V
O
= –14V to 13.5V
G = 1 ±0.01 ±0.05 ✻ ±0.1 %
G = 10 ±0.03 ±0.4 ✻ ±0.5 %
G = 100 ±0.05 ±0.5 ✻ ±0.7 %
G = 1000 ±0.5 ✻ %
Gain vs Temperature
(1)
G = 1 ±1 ±10 ✻✻ppm/°C
G > 1 ±25 ±100 ✻✻ppm/°C
Nonlinearity V
O
= –14V to 13.5V
G = 1 ±0.0002 ±0.001 ✻ ±0.002 % of FSR
G = 10 ±0.0015 ±0.005 ✻ ±0.008 % of FSR
G = 100 ±0.0015 ±0.005 ✻ ±0.008 % of FSR
G = 1000 ±0.002 ✻ % of FSR
OUTPUT
Voltage: Positive R
L
= 100kΩ (V+)–0.9 ✻ V
Negative R
L
= 100kΩ (V–)+0.15 ✻ V
Positive R
L
= 10kΩ (V+)–1.5 (V+)–0.9 ✻✻ V
Negative R
L
= 10kΩ (V–)+1 (V–)+0.25 ✻✻ V
Capacitance Load Drive 1000 ✻ pF
Short-Circuit Current ±14 ✻ mA
FREQUENCY RESPONSE
Bandwidth, –3dB G = 1 600 ✻ kHz
G = 10 300 ✻ kHz
G = 100 50 ✻ kHz
G = 1000 5 ✻ kHz
Slew Rate V
O
= ±10V, G ≤ 10 0.7 ✻ V/µs
Settling Time, 0.01% G = 1 to 10 20 ✻ µs
G = 100 35 ✻ µs
G = 1000 260 ✻ µs
Overload Recovery 50% Input Overload 5 ✻ µs
POWER SUPPLY
Voltage Range ±2.25 ±15 ±18 ✻✻ ✻ V
Quiescent Current I
O
= 0V ±450 ±525 ✻✻µA
TEMPERATURE RANGE
Specification –40 85 ✻✻°C
Operating –55 125 ✻✻°C
Storage –55 125 ✻✻°C
Thermal Resistance,
θ
JA
8-Lead DIP 100 ✻ °C/W
SO-8 Surface Mount 150 ✻ °C/W