PGA100 MAXIM | Alldatasheet
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Programmable Gain Amplifier The PGAIOO is a precision, digitalrprogrammable — @ High Gain Accuracy +0.02% max (B Grade) 2 gain amplifier (| combined with an 8 channel $sverotected input multiplexer. The user can select @ ‘Put protection, +20V above +15V supplies any ore of eight analog input channels tobe ampitied —@ High Input Impedance: 1010 3 y one of the eight noninverting binarily weighted gain steps from 1 fo 128. The digital gain and channel @ Fast Settling, Sysec to 0.01% 6 select ate internally latched for easy microprocessor @ Low Channel to Channel Crosstalk, -904B interface. The fast Syusec settling time allows the PQAIGO to be used ih rapid chapnel scanning data @ Low nonlinearity +0.005% max (B Grade) acquisition systems. @ 8 analog input channels Applications 8 Selectable Gains, 1, 2,4, 8, 16, 92, 64, 128 VV Data Acquisition Amplifier © Fully microprocessor-compatible Software Error Correction . Digitally-Controlled Autoranging Test Equipment Remote Instrumentation System System Dynamic Range and Resolution Improvement sy ov ov m Ce [2a) ms ine [2] | 23) Ne TTL ws 3] [22] mms Tee 410y INPUT Ne 2] [2] No stom INPUT ™ puatog ]MAXIM aioe my OUT 3 Skouno: 2] pGaroo 22) crouno- rwenmocourte ms no (| ba) ae moos MAXI vi) QimweNSaTION \\=— | PGAIO0 iy [73] cP me ae : eserranoN o's moe as (3 [ie] as [wH™ v & 15) vee rman cavoe ico pen] ourput [ii] [32] oicrraL. GROUND ‘test Le] scate apvust [72] [a] camnerenence / + eno REFERENCE “USE PIN 20 AS THE PRIMARY ANALOG COMMON MAXIMS Maxim Integrated Products 5-123 Maxim is a registered trademark of Maxim Integrated Products.
Programmable Gain Amplifier © ABSOLUTE MAXIMUM RATINGS gem Digital Supply (Voc) veeeeseceeteeesecseeceesesses 47 Output Short-Circuit Duration .... Continuous to Ground ‘Stresses above those listed under ‘Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and iunctional operation of the device af these or any other conditions above those indicated in the operational sections of the specification 1s not Implted. Exposure fo absolute Meximum ratings conditions for extended periods may affect the device reliably
ELECTRICAL CHARACTERISTICS
(Wee = SV, V' = +15V, V" = ~15V, T, = #25°C, unless otherwise noted.) conemiens [in ave wax [wan Tv wax | Gain Accuracy (Note 1) G = 1 t0 128, Io = 1mA £01 £05 +005 4021 % vs Temperature (Note 2) 25°C ST, S 485°C +5 +10 +5 «+10 | ppmec vs Time 4.001 +001 94/1000 Hrs. Nonlinearity (Note 3) G = 1 t0 128, Io = 1mA £004 +01 £002 +£.005| % of FS vs Temperature (Note 2) “25°C ST, 5 85°C #2 $5 42 45 | ppm/eC vs Time +.001 ‘+.001 |%/1000 Hrs. [Reed Oven [Yigg “ammo [rate Oupurcorent [Vans s0v + #2 ———~idt se | [ouput Resstince | |oanswe ~~ os SiS me [Shon Circuit Current Pt ma [Cepsciive toad | [Phase meron" [ wo | ooo —*i| oF | Offset Voltage Ta = 25°C 401 41 £065 £5 | mv vs Temperature BC = T, < 185°C +6 +6 WP vs Supply BV <|V| < 18V +10 «+80 +10 «+80 WN vs Time 15 +15 uV/month Input Bias Current “Off” Channel +10 +10 “On” Channel +01 +01 1 vs Temperature Note 4 Note 4 Input Difference Current, between Channels: “Off” Channel +20 +20 “On” Channel 402 402 42 vs Temperature Note 4 Note 4 Analog Input Characteristics: Input Voltage Range Linear Operation +10 +10 v Input impedance “Off” Channel 10°2|15 1072115, QlipF “On” Channel 4071125 108/25 QlipF Input Voltage Noise Density fo = 1Hz 200 200 nV//Hz to = 10Hz 60 60 nV/Hz fo = WOH 25 25 nVi/Hz fo = kHz 18 8 nvi/Hz fo = 1OkHz 18 18 nvi/Hz fo = 100kHz 8 8 nz Seyzq_ CJM KI
Programmable Gain Amplifier ELECTRICAL CHARACTERISTICS (Continued) (Voc = 5. V’ = +15V, Vv = -15V, T, = +25°C, unless otherwise noted.) ‘SYMBOL CONDITIONS > mn TWP MAX ~ [Votege nome SiC too | eT eT ee | [current Nowe bonsiy | [tos Ormemmuene | 6 | 6 si ave | © [curent Nose | tow = Onto Tore TST Gain Bandwidth Prout || | | Te Settling Time (Note 5) G=1, Vo=t10V, R,=5kQ to 1% to 0.1% to 0.01% [Rise tine ——SS*CSSSC*d to BO, Toomer [pase main SSCP SC*dS eo | TT Overioad Recovery (Note6) | ___[G=1,50%overaive | 2 | 2 mee 20V,,5, 1kHz sine, Crosstalk, RT! (Note 5, 7) Rg = 1k on all +0.003 0.003 OFF channels: Digital Inputs (Note 8): Input "LOW" Threshold Input" HIGH Tereshois | —i| OT Clock Pulse Wieth (ow) | tm | dT CT see Setup Time (CP to data) | tn | | i tee Hold Time (CPtodatay | ty | iT 8 | tee Setup Time (CEwcr) | t» | «iL tee Hows Time (Ew OP) | we | | s | Stee [viv Range ‘| [Owed pertormance [ae saa ae [| FL 2 Ln 2 IVooRange id ~*d a petormance dare sas [ars sas |v [VecGuent iP ides gasv a | Tm Note 1: inaccuracy is the percent error between the actual and ideal gain selected measured after temperature stabilization. It may be externally adjusted to zero. Note 2: Parameter is untested and is not guaranteed. Note 3: Nonlinearity is the maximum peak deviation from a “best straight line” (curve fitting on input-output graph) expressed as a percent of the full scale peak-to-peak output. Gain constant, Voyy ranges from -10V to +10V. Note 4: Doubles approximately every 10°C. Note 5: See Typical Performance Curves. Note 6: Time required for the output to return from saturation to linear operation following the removal of an input overdrive signal. Note 7: Crosstalk is the amount of signal feedthrough from all OFF channels that appears at the output of the input multiplexer. It is express as a percent of the signal applied to all OFF channels. Note 8: All digital inputs are one 74LSTTL load. Timing specifications not tested; guaranteed by design. MAXIM 5 ,
Programmable Gain Amplifier ° — _.. Typical Performance Curves =) SETTLING TIME vs GAIN AND SMALL SIGNAL FREQUENCY q ‘SETTLING TIME vs GAIN SOURCE RESISTANCE RESPONSE « 2 é a: ate tH gq: aie Seen i RE A i SEE? (SS A 2 A i. OO Fe Pat oY PL A ° SEY i. BEEZ EEE SAL) tee Po ee eee CC ee GAIN (WY) GAIN (WV) FREQUENCY (Hz) LARGE SIGNAL OUTPUT INPUT NOISE VOLTAGE INPUT NOISE CURRENT VOLTAGE vs FREQUENCY vs FREQUENCY vs FREQUENCY a pee pee dP eee Poe | tReet eee 3 |wclemoe| | | € EXEPT! ¢ EEE Et AS 5% 3 SSS § SRS ee ee BT elebe VL] 2 “EEE a a ao 5 S&S 5 SSeS ~ 8 TT TTIN I § Geers Eee ee a ee i eo FREQUENCY (Hz) FREQUENCY (Hz) ‘FREQUENCY (Hz) OFF CHANNEL LEAKAGE CHANNEL-TO-CHANNEL CURRENT vs INPUT VOLTAGE INPUT LEAKAGE vs INPUT CROSSTALK vs FREQUENCY WITH +15V SUPPLIES VOLTAGE WITH V* = V- = OV Fa Eee ® | A aH mal wa an IH
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the clock pulse, pin 18, when the clock enable, pin 19, _circult/process as used in the MAX358 multiplexer. effect on the unity gain accuracy. Figure 1. Equivalent Internal Schematic
38 Table 1: Gain and Channel Select Truth Table
Figure 2. Timing Diagram for Selected Addresses Figure 3. Data Address and Clock Enable Setup and
8 Typical System Application
Figure 6. Multiple Channel, Variable Gain Data Acquisition System.