ADVANCE DATASHEET D LNDINA333A/B/C INA333 Footprint Compatible Instrumentation Amplifiers (INA) use 50% Less Current Fully differential AC Only (LND GENERAL DESCRIPTION FEATURES The LNDINA333A/B/C are precision instrumentation amplifiers designed to be footprint compatible with the TI INA333. Although the LNDINA333 are footprint compatible they offer similar performance to the INA333 with a 30% reduction in power consumption (25uA typical and 30uA maximum vs. 50uA typical and 80uA maximum for the INA333). The LNDINA333A has a single ended output replicating the INA333A while the outputs of LNDINA333B/C are fully differential. If an RG resistor is connected between the RG pins then the differential current will be set by the external resistor. On the other hand if the RG inputs remain high impedance then a pulse on RG/DIG- will cause an internal resistor to decrement in value, while a pulse on RG/DIG+ will cause the internal resistor to increment in value. Default is half scale. The LNDINA333C is an AC only instrumentation amplifier which has a 5Hz 3dB high pass response. Integrators are connected between the output and feedback nodes to form a high pass response as shown in the block diagram below. The LNDINA333A/B/C features 8kV HBM ESD protection compared to 4kV with the INA333. The inputs are also RFI filtered to reduce EMI susceptibility. The LNDINA333A/B/C is available in a EPAD DFN-8 package which has a 65°C/W thermal resistance. BLOCK DIAGRAM RG/DIG+ GND EPAD INP INM RG/DIGVDD VOUT/VOP REF/VOM Instrumentation Amplifier Single ended (LNDINA333A) Fully differential (LNDINA333B) Fully differential AC only (LNDINA333C) +2.7V to +5.5V input range 25μA typ current consumption (INA333, 50μA) 35μA typ current (LNDINA333C) 350kHz typical bandwidth 25μV typical input offset voltage 100dB typical CMRR 100nV/√Hz typical input referred noise RFI Filtered Inputs External resistor or programmable gain Minimum gain setting 100V/V Input range: GND-0.1V to VDD+0.1V Output range: GND+0.05V to VDD-0.05V Low drift: 2μV/°C typical +/-5pA typical input bias current 10mA short circuit current 8kV ESD Protection (vs. 4kV for INA333) Temperature range: -40°C to 125°C Footprint compatible with EPAD DFN-8 APPLICATIONS Portable heart rate equipment Portable fitness & wellness products Non-critical diagnostics Vibration measurement equipment Instrumentation Bridge amplifiers Pressure sensors Weigh scales Sensor amplifiers PACKAGE RG/DIG+ INP Figure 1 – LNDINA333C Equivalent Block Diagram GND RG/DIG- EPAD INM VDD VOUT/VOP REF/VOM Linear Dimensions Semiconductor Inc. 22620 Ricardo Rd, Cupertino CA 95014 USA tel 312.321.1810 fax 312.321.1830 www.lineardimensions.com LNDINA333A, LNDINA333B, LNDINA333C INPUT Offset Voltage vs Te m perature -100 Common-Mode Voltage Range Common-Mode Rejection 25 -40°C < t < 125°C 100 (V-)+0.1 μV μV/°C 2 (V+)-0.1 V DC to 60Hz, VCM=(V-)+0.1V to (V+)-0.1V Gain = 100 90 100 dB Gain = 1000 90 100 dB INPUT BIAS CURRENT Input Bias Current +-5 +-50 pA Input Offset Current +-5 +-50 pA INPUT NOISE Input Voltage Noise G=100 f = 100Hz 100 nV/√ Hz f = 1kHz 50 nV/√ Hz μVpp f = 0.1Hz to 10Hz Input Current Noise f = 1kHz 1 fA/√ Hz GAIN Gain Equation 1 + 100kΩ/RG Range of Gain Gain Error 100 2000 VS=3.3V, (V-) + 0.1V < V O < (V+) - 0.1V G = 100 +-0.1 +-0.25 G = 1000 +-0.25 +-0.5 % +-15 +-50 ppm /°C Gain vs Tem pe rature % Gain Nonlinearity G = 250 to 2000 10 ppm OUTPUT Output Voltage Sw ing From Rail 50 mV Capacitive Load Drive 200 pF Short-circuit Current +-10 mA 3.5 kHz FREQUENCY RESPONSE Bandw idth, -3dB G = 100 350 Hz Slew Rate G = 1000 0.03 V/μs Settling Time to 0.01% 500 μs REFERENCE OUTPUT VREF 0.88 0.9 0.92 V POWER SUPPLY Voltage Range 2.7 Quiescent Current 5.5 V 27 μA 30 μA 0.9 0.92 V 35 38 μA 42 μA V 25 vs Te m perature LNDINA333B Common-Mode Output Voltage 0.88 LNDINA333C Quiescent Current vs Te m perature Common-Mode Output Voltage 0.9 V S/2 0.92 Middle-Point Common Mode Point 0.88 Low -Pass Filter Cutoff Frequency 2.5 5 V Hz Linear Dimensions Semiconductor Inc. 22620 Ricardo Rd, Cupertino CA 95014 USA tel 312.321.1810 fax 312.321.1830 www.lineardimensions.com