Datasheet LT1994 (Analog Devices) - 3

LT1994
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. V+ = 3V, V– = 0V, VCM = VOCM = VICM = mid-supply, VSHDN = OPEN, RI = RF = 499
Ω
, RL = 800
Ω
to a mid-supply voltage (See Figure 1) unless otherwise noted. VS is defi ned (V+ – V–). VOUTCM is defi ned as (V + – + – + – + – OUT + VOUT )/2. VICM is defi ned as (VIN + VIN )/2. VOUTDIFF is defi ned as (VOUT – VOUT ). VINDIFF is defi ned as (VIN – VIN ). C/I GRADES H/MP GRADES SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
VOSDIFF Differential Offset Voltage VS = 2.375V, VICM = VS/4 l ±2 ±2 mV (Input Referred) VS = 3V l ±2 ±2 mV VS = 5V l ±2 ±2 mV VS = ±5V l ±3 ±3 mV ΔVOSDIFF/ΔT Differential Offset Voltage Drift VS = 2.375V, VICM = VS/4 3 μV/°C (Input Referred) VS = 3V 3 μV/°C VS = 5V 3 μV/°C VS = ±5V 3 μV/°C IB Input Bias Current (Note 6) VS = 2.375V, VICM = VS/4 l –45 –18 –3 –45 –18 –3 μA VS = 3V l –45 –18 –3 –45 –18 –3 μA VS = 5V l –45 –18 –3 –45 –18 –3 μA VS = ±5V l –45 –18 –3 –45 –18 –3 μA IOS Input Offset Current (Note 6) VS = 2.375V, VICM = VS/4 l ±0.2 ±2 ±0.2 ±2 μA VS = 3V l ±0.2 ±2 ±0.2 ±2 μA VS = 5V l ±0.2 ±3 ±0.2 ±3 μA VS = ±5V l ±0.2 ±4 ±0.2 ±4 μA RIN Input Resistance Common Mode 700 700 kΩ Differential Mode 4.5 4.5 kΩ CIN Input Capacitance Differential 2 2 pF en Differential Input Referred Noise f = 50kHz 3 3 nV/√Hz Voltage Density in Input Noise Current Density f = 50kHz 2.5 2.5 pA/√Hz enVOCM Input Referred Common Mode Output f = 50kHz, VOCM Shorted to Ground 15 15 nV/√Hz Noise Voltage Density VICMR Input Signal Common Mode Range VS = 3V l 0 1.75 0 1.75 V (Note 7) VS = ±5V l –5 3.75 –5 3.75 V CMRRI Input Common Mode Rejection Ratio VS = 3V, ΔVICM = 0.75V l 55 85 55 85 dB (Note 8) (Input Referred) ΔVICM/ΔVOSDIFF CMRRIO Output Common Mode Rejection Ratio VS = 5V, ΔVOCM = 2V l 65 85 65 85 dB (Note 8) (Input Referred) ΔVOCM/ΔVOSDIFF PSRR Differential Power Supply Rejection VS = 3V to ±5V l 69 105 69 105 dB (Note 9) (ΔVS/ΔVOSDIFF) PSRRCM Output Common Mode Power Supply VS = 3V to ±5V l 45 70 45 70 dB (Note 9) Rejection (ΔVS/ΔVOSCM) GCM Common Mode Gain (ΔVOUTCM/ΔVOCM) VS = ±2.5V l 1 V/V Common Mode Gain Error VS = ±2.5V l –0.15 ±1 % 100 • (GCM – 1) BAL Output Balance (ΔVOUTCM/ΔVOUTDIFF) ΔVOUTDIFF = 2V Single-Ended Input l –65 –46 –65 –46 dB Differential Input l –71 –50 –71 –50 dB VOSCM Common Mode Offset Voltage VS = 2.375V, VICM = VS/4 l ±2.5 ±25 ±2.5 ±25 mV (VOUTCM – VOCM) VS = 3V l ±2.5 ±25 ±2.5 ±25 mV VS = 5V l ±2.5 ±30 ±2.5 ±30 mV VS = ±5V l ±2.5 ±40 ±2.5 ±40 mV 1994fb 3