Variable Gain Amplifiers (VGA), Programmable Gain Instrumentation Amplifiers (PGIA) Links

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AD8260 - VGA amplifier contains Receiver and Transmitter for transmitting signals over power lines, cables and other applications with low impedance. Receiver has gain range 30dB in 3dB steps from -6dB to +24dB, 2.4nV/√ ^Hz, 5pA/√ ^ noise figures, frequency band of 180MHz at -3dB. Transmitter has high output current driver +/-300mA and +/-200mA up to 100kHz, capable of driving 10 Ohm with 2Vp-p at 10MHz.  93mW dissipated power. Single ended input, dual output.  $3.79/1k   http://www.analog.com/en/prod/0,2877,AD8260,00.html

LMP8100A - achieves 0.03% gain accuracy over temperature and gain settings, gain range 1 to 16V/V (24dB range), programmable gain and frequency compensation, input zero calibration switch allows output offset voltage measurement and calibration, glitch-free transition between programmed settings, 12nV/sqrt{Hz}, noise, SOIC-14 package, serial data in, out, built in RRIO op amp, -40 degrees C to 125 degrees C, 12V/us slew rate, input resistance 10 GΩ (at 10 Hz),  bandwidth 33MHz to 9.5MHz, supply voltage 3.3V, 5V, supply current 5mA, shutdown current at 5 V is 3.5 ľA (typical) and 1.8 ľA at 3.3 V. Output current 20mA. LMP8100 has poorer accuracy of 0.075%. Three-wire serial interface. $7 and $2.50 per 1k.  http://www.national.com/pf/LM/LMP8100.html

PGA2311 - 2 channel, PGA4311 - 4 channel - Digitally controlled ICs via serial interface. 120 dB dynamic range, 0.0002% THD+N, 130 dB interchannel crosstalk, 2.5uVrms output noise, 5V supply, can drive 600 load, gain range +31.5dB to -95.5dB with 0.5dB steps, zero crossing detection, mute, DIP-16, SOL-16, SOP-28, $5/1k and $9/1k   http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=PGA2311
                   
That Corporation - 2181 Series with trimming, 2.4 mAdc, +/-15 Vdc, 0.005% to 0.03% (LA/$4.70 to LC /$2.55 grade), +/-6.1 mV/dB, -100 dB to +40 dB gain rangee, -98 dBV output noise at 0 dB gain, 120 dB dynamic range, 8 pin SIP, 8 pin SO    http://www.thatcorp.com/2181desc.shtml
That Corporation - 2180 Series with no trimming, 2.4 mAdc, +/-15 Vdc, 0.005% to 0.03% (LA/$4.80 to LC /$2.55 grade), +/-6.1 mV/dB, -100 dB to +40 dB gain range, -98 dBV output noise at 0 dB gain, 120 dB dynamic range, 8 pin SIP   http://www.thatcorp.com/2180desc.shtml

SSM2167  Low Voltage Microphone Preamplifier with Variable Compression & Noise Gating 2.5-5.5 Vdc, 2.3 mA / 2 uA, 20 nV/√ ^Hz, 1 MHz  http://products.analog.com/products/info.asp?product=SSM2167

AD8231 - G = 1,2,4,8,16,32,64,128.  Zero-Drift.  4mA supply current, 3-6V supply voltage, slew rate 1.1V/us, CMRR 80dB minimum, 2.7MHz bandwidth gain = 1 and 100kHz gain = 10, drift 10ppm/C deg, input offset drift 50nV/C deg, input offset 15uV maximum,  RRIO, $1.69/1k,  http://www.analog.com/en/prod/0,2877,AD8231,00.html
AD8250, AD8251 - G = 1,2,5,10  (AD8250), G = 1,2,4,8 (AD8251).  3.5mA supply current, slew rate 20V/us, setting time 0.5us to 0.01%, CMRR 80dB up to 50kHz, 12MHz bandwidth gain, drift 10ppm/C deg, input offset drift 1uV/C deg, input offset 100uV,  $4.95/1k, http://www.analog.com/PGIA-AD825x
AD603    +/-5Vdc, 125 mW, 90 MHz, -11 to +31 dB, +9 to +51 dB gain, +/-0.5 dB gain accuracy,  gain control voltage 0 to 1V, 25mV/dB scaling,  1.3 nV/√ ^Hz, Single, 8-Lead  SOIC http://products.analog.com/products/info.asp?product=AD603
AD604    +/-5Vdc,  40 MHz, 0 to +48 dB, +6 to +54 dB ain, +/-0.3 dB gain accuracy,  gain control voltage 0.4 to 2.4V, 20dB/V scaling,  0.8 nV/√ ^Hz, Dual, 24-Lead  SOIC   http://products.analog.com/products/info.asp?product=AD604
AD605    +/-5Vdc, 36 mA tot, 40 MHz, -14 to +34 dB, 0 to +48 dB gain, +/-0.2 dB gain accuracy,  gain control voltage 0.4 to 2.4V, 20dB/V to 30dB/V scaling,  Dual, 16-Lead  SOIC  http://products.analog.com/products/info.asp?product=AD605
AD628   Common-mode difference amplifier with programmable gain 0.1 to 1,000 and can accept +/-140 V inputs.  +5V to +15V supply, 80dB CMRR from dc to 500 Hz. SOIC-8, uSoic, -40 to +85 C deg, $3.45/1k    http://products.analog.com/products/genericInfo.asp?product=AD628
AD8367   +2.7Vdc to 5.5Vdc, 500 MHz, -2.5 to +42.5 dB gain, +/-0.5 dB gain accuracy,  gain control voltage 0 to 1V, 20mV/dB scaling, 7 dB noise figure at max. gain, Single, 14-Lead TSSOP,  http://products.analog.com/products/info.asp?product=AD8367

VCA2612     1.25 nV/√ ^Hz, 40 MHz,  +5dB to +25dB preamp and +24 dB to +45 dB amp, 52 dB crosstalk, differential IN/OUT, Active Termination Noise Reduction, Dual, Ultrasound & Test Equipment applications,  TQFP-48, $11.75 /1k   http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=VCA2612
VCA2613    1.0 nV/√ ^Hz, 80 MHz,  +5 dB to +25 dB gain range, differential IN/OUT, Active Termination Noise Reduction, Dual, Ultrasound & Test Equipment applications  http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=VCA2613
VCA2614     3.6 nV/√ ^Hz, 40 MHz,  +24 dB to +45 dB gain range, 52 dB crosstalk, differential IN/OUT,  Dual, Ultrasound & Test Equipment applications, TQFP-32  http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=VCA2614
VCA610      2.2 nV/√ ^Hz, 3.5dB @ 200 Ohm noise figure, 1 MHz,  -38.5 to +38.5 dB gain range, Single, 300 dB/us gain slew rate, gain control voltage 0 to 2 Vdc, SO-8  http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=VCA610

CLC520       60 nV/√ ^Hz, 10-14 Vdc, 13.5 mA, 160 MHz, gain control range 40 dB, gain control voltage 0 to 2V, differential IN    http://www.national.com/pf/CL/CLC520.html
CLC522       5.8 nV/√ ^Hz, 10-14 Vdc, 13.5 mA, 330 MHz, gain control range 40 dB, gain control voltage +1 to -0.98 V, differential IN    http://www.national.com/pf/CL/CLC522.html
CLC5523     4 nV/√ ^Hz, 10-14 Vdc, 28 mA, 250 MHz, gain control range 60 dB, gain control voltage 0 to 2V http://www.national.com/pf/CL/CLC5523.html

BGA2031   http://www.philipsanalytical.com/pip/BGA2031/1#description

LTC6915   Most precise instrumentation amp with digital gain control. Gain programmable via serial SPI or parallel port in 14 steps within 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096 V/V. CMRR = 125 dB. Gain accuracy = 0.07 5% max at G = 1 and 0.6 % max at G = 64 to 1024. Input offset voltage = 10 uV max. offset voltage drift = 50nV/C deg max. Rail-to-Rail Input/Output. 2.7V to +/-5.5 V supply voltage and 1.6 mA supply current. -40 C deg to +125 C deg temperature range.   http://www.linear.com/prod/datasheet.html?datasheet=1086 
LTC6910-1   Low cost PGA in SOT-23 case. $0.90 @ 100k. Dynamic range: 119 dB, up to 16 dB accuracy, rail to rail input and output, 3 bit Digital Gain Control  with inverting gain 0, 1, 2, 5, 10, 20, 50, 100 V/V, bandwidth is 11 MHz, noise 9 nV/rt Hz at gain of 100, distortion is 0.003%, single or dual power supply 2.7 to 10 V.
LTC1564      Dynamic range: 112 dB at +3V and 122 dB at +/-5V (equal to 20 bits), rail to rail input and output, built in 8th Order Lowpass Filter adjustable from 10 kHz to 150 kHz in 10 kHz steps, 100 dB attenuation at 2.5 x fcutoff, 4 bit digitally programable gain amplifier, gain 1 to 16 in 1V/V steps, no external components, 2.7V to 10V operation, shutdown mode, 16 pin SSOP case.    http://www.linear-tech.com/prod/datasheet.html?datasheet=792
LT1167        Gain programmable, precision instrumentation amplifier, 7.5 nV/(root)Hz noise, 0.9mA current drain, +/-2.3 to +/-18V supply, PSRR = 105 dB, CMRR = 90 dB, input bias 350 pA max, input offset voltage 60uV max, input offset drift 0.3uV/C deg max,  at gain 10, single resistor sets gain 1 to 10,000 and gain non-linearity = 0.08% max.     http://www.linear-tech.com/prod/datasheet.html?datasheet=437

MAX3861      AGC Amplifier amplifies, attenuates the input signal to the fixed output voltage swing. Up to 2.7 Gbps, I/Os are on chip terminated to match 50 OHm lines. Received signal strength indicator and Loss of signal indicator with a programmable threshold.  Ideal for optical receivers. 3.3V supply, 72 mA supply, 3.6 GHz small signal band, 0.26 mVrms max input noise, 0.2 dB output voltage variation, 46 dB dynamic range, $14.25/1k  http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=3306