1 to 1000 5 to 1000 10,100 1 to 1000 10 to 1000 1, 2, 4, 8, 16, 2700 32, 64, 128 23 (G = 5) 5 to 200 23 (G = 5) 5 to 200 10,000 1, 2, 5, 10 10,000 1, 2, 4, 8 10,000 1, 10, 100, 1000 1 0.1 to 10,000 250 1 to 1000 1500 1 to 1000 15000 1 to 10,000 3500 (G = 2000) 2000 10000 1 to 10,000
USD 1000s, recommended resale, FOB U.S.A. Prerelease.
Instrumentation Amplifier Applications
BRIDGE MEASUREMENT EXAMPLE
+VS R R R –IN R RG R R R1 R1 R1 +IN –VS REF R1 –IN
• • • • • • •
• • • • • • • •
0.55, 0.48 0.085 0.8 1 1 2.2 0.5 1.6 0.425 0.425 1 2.3 3.5 4.5 0.04 0.04 4.5 4.5 5.3 1.2 0.09 0.85 6.7 6.8 2.5
• • • 16-lead LFCSP • • 16-lead LFCSP • • • • • • 16-lead LFCSP • 16-lead LFCSP 11-lead WLCSP • • • • • • 16-lead LFCSP • • • •
Comments Most popular in-amp Precision gains of 10 and 100 Low cost, ±15 V in-amp Low cost in-amp Micropower, wide supply voltage range High input impedance JFET in MSOP package Highest performance in MSOP package Highest performance on the market High performance dual-channel or differential output Improved replacement for INA126 High performance JFET dual-channel or differential output Wide supply range, rail-to-rail output Wide supply range, rail-to-rail output Low gain drift G = 10, G = 100 AD8221 plus two precision op amps Zero drift with resistor-programmable gain Digitally programmable, zero drift, with extra precision op amp Lowest power, smallest in-amp on the market Lowest power in-amp on the market Digitally programmable, fast settling Digitally programmable, fast settling Digitally programmable, fast settling Low voltage, zero drift Micropower, wide supply voltage range Dual of AD8226 in compact LFCSP Low noise, high bandwidth, low distortion Low noise G = 2000 with filter option 3.2 nV/√Hz noise, high bandwidth, overvoltage protection
Input Voltage Input Bias Input Voltage Noise Offset (RTI) Current Max Density (f = 1 kHz) (nA) Max (������V) Max (nV/√Hz ) 125 250 (total RTI) 125 200 200, 250 250, 300 70 25 60 250 300 200 200 90 120 10 15 2.5 3.5 200 200 150 20 200 200 150 25 150 2 2 5 25 10 0.025 2 0.4 2 25 0.025 27 27 1.5 2 1 0.5 0.05 0.01 30 30 50 1 40 27 300 50 15 13 17 (total RTI) 12 (typ) 35 (typ) 38 (typ) 17 8 8 8 35 17 24 25 8 8 240 32 76 76 18 18 10 30 50 24 1 1.5 3.2
Settling Time to 0.01% G = 1 Typ (������s) 15 12 (G = 10, 100) 10 (to 0.1%) 30 135 (G = 5), 65 (G = 5) 5, 2.5 10 10 10 90 (G = 5) 5, 2.5 25 14 (G = 5) 6 (G = 10) 10 — 4 444 (G = 5) 444 (G = 5) 0.585 0.615 0.78 — — 25 0.75 — 0.75
Gain Error @ G = 1 Max (%) 0.1 0.15 (G = 10, 100) 0.15 0.1 0.1 (G = 5) 0.06 0.1 0.02 0.05 0.1 0.06 0.04 0.04 (G = 5) 0.07 (G = 10) 0.05 0.01 0.05 0.05 (G = 5) 0.05 (G = 5) 0.03 0.03 0.03 0.05 (G = 100) 0.05 0.04 0.05 0.05 0.05
Make vs. Buy?
DISCRETE SOLUTIONS
OP AMP R R1 R2
ADI Full Signal Chain
ADI’s MONOLITHIC SOLUTIONS
INSTRUMENTATION AND DIFFERENCE AMPLIFIERS FIT HERE
SIGNAL CONDITIONING VREF INTERFACE RS-232 RS-485 DIGITAL CONTROL DSP/ P/ C/PC
BW @ G = 1 Typ (kHz) 1000 800 (G = 10) 1000 800 80 (G = 5) 1500 825 825 1200 180 (G = 5) 1500 1500 250 (G = 5) 650 (G = 10) 1200 2 (G = 10)
Gain Range Min to Max (V/V) 1 to 10,000 10, 100 1 to 1000 1 to 1000 5 to 1000 1 to 1000 1 to 1000 1 to 1000 1 to 10,000 5 to 1000 1 to 1000
1 2
Package
Rail-to-Rail Output
Supply Current Max (mA) 1.3 1.3 1.3
Operating Voltage Range (V) ±2.3 to ±18 ±2.3 to ±18 ±2.6 to ±18 ±2.5 to ±6, 2.7 to 12 ±1.1 to ±18, 2.2 to 36 ±2.25 to ±18, 4.5 to 36 ±2.3 to ±18 ±2.3 to ±18 ±2.3 to ±18 ±2.5 to ±12.5, 2.7 to 25 ±2.25 to ±18, 4.5 to 36 ±1.35 to ±18, 2.2 to 36 ±1.5 to ±18, 2.2 to 36 ±2.3 to ±18 ±2.3 to ±18 ±4 to ±8, 8 to 16 ±1.5 to ±3, 3 to 6
CMRR @ 60 Hz G = 1 Min (dB) 73 93 (G = 10) 66 70 77 (G = 5) 78 80 90 80 82 (G = 5) 78 80 90 (G = 5) 94 (G = 10) 80 110 (G = 10) 80
Input Voltage Offset TC Max (������V/°C) 1 2.5 (total RTI) 1 2 3 10 0.9 0.3 0.4 4 10 2 2 0.9 0.4 0.05 0.05 0.7 (typ) 2.5 (typ) 1.2 1.2 1.2 0.1 1 2 1 0.3 1
Price @ 1k (OEM $U.S.)1 3.27 4.20 2.48 1.38 2.53 2.29 1.99 4.06 3.59 1.15 4.12 1.40 1.38 3.03 2.01 2.95 1.69 1.59 1.24 4.95 4.95 4.95 1.30 0.89 2.20 3.50 6.60 TBD
RG R OP AMP R1
OP AMPRG来自IN-AMPSENSOR
MUX
ADC
DAC
ISOLATION
R2
POWER MANAGEMENT
MICROPROCESSOR SUPERVISORY
• Transducer interfaces • Bridge amplifiers • Strain gages • Medical instrumentation
• Industrial process control • Data acquisition • Power monitoring