Datasheet LT1997-3 (Analog Devices) - 5

LT1997-3
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, –40°C < TA < 85°C for I-grade parts, –40°C < TA < 125°C for H-grade parts, otherwise specifications are at TA = 25°C. Difference Amplifier Configuration, V+ = 5V, V– = 0V, VCM = VOUT = VREF = VREF1 = VREF2 = Mid-Supply. VCMOP is the common mode voltage of the internal op amp. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆G Gain Error VOUT = 1V to 4V G = 1 ±0.001 ±0.006 % l ±0.012 % G = 3 ±0.001 ±0.015 % l ±0.02 % G = 9 ±0.002 ±0.03 % l ±0.04 % ∆G/∆T Gain Drift vs Temperature (Note 6) VOUT = 1V to 4V l ±0.2 ±1 ppm/°C GNL Gain Nonlinearity VOUT = 1V to 4V ±1 ppm VOS Op Amp Offset Voltage (Note 9) V– < VCMOP < V+ – 1.75V ±20 ±60 µV l ±200 µV ∆VOS/∆T Op Amp Offset Voltage Drift (Note 6) V– < VCMOP < V+ – 1.75V l ±0.5 ±1.5 µV/°C IB Op Amp Input Bias Current V– + 0.25V < VCMOP < V+ – 1.75V –5 ±2 5 nA l –15 15 nA IOS Op Amp Input Offset Current V– + 0.25V < VCMOP < V+ – 1.75V –3 ±0.5 3 nA l –10 10 nA RIN Input Impedance (Note 8) Common Mode G = 1 l 19 22.5 26 kΩ G = 3 l 12.6 15 17.4 kΩ G = 9 l 10.5 12.5 14.5 kΩ Differential G = 1 l 38 45 52 kΩ G = 3 l 12.6 15 17.4 kΩ G = 9 l 4.2 5 5.8 kΩ CMRR Common Mode Rejection Ratio, G = 1, VCM = –2.5V to +4.0V 90 100 dB MS16 Package l 88 dB G = 3, VCM = 0V to +3.5V 90 103 dB l 87 dB G = 9, VCM = 0V to +3.3V 96 108 dB l 94 dB CMRR Common Mode Rejection Ratio, G = 1, VCM = –2.5V to +4.0V 90 96 dB DF14 Package l 88 dB G = 3, VCM = 0V to +3.5V 90 101 dB l 87 dB G = 9, VCM = 0V to +3.3V 96 107 dB l 94 dB ∆R/R Reference Divider Matching Error Available in MS16 Package Only ±0.001 ±0.006 % ∆R R l ±0.012 % = REF1 – RREF2 R ⎛ RREF1+RREF2 ⎞ ⎝⎜ 2 ⎠⎟ PSRR Power Supply Rejection Ratio VS = ±1.65V to ±25V, VCM = VOUT = Mid-Supply l 114 124 dB (Note 9) eni Input Referred Noise Voltage Density f = 1kHz G = 1 50 nV/√Hz G = 3 30 nV/√Hz G = 9 22 nV/√Hz Rev A For more information www.analog.com 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS