Datasheet LTC1196, LTC1198 (Analog Devices)

LTC1196/LTC1198 8-Bit, SO-8, 1Msps ADCs with Auto-Shutdown Options
FEATURES DESCRIPTION
n
High Sampling Rates: 1MHz (LTC1196)
The LTC®1196/LTC1198 are 600ns, 8-bit A/D converters
750kHz (LTC1198)
with sampling rates up to 1MHz. They are offered in 8-pin n
Low Cost
SO packages and operate on 3V to 6V supplies. Power n Single Supply 3V and 5V Specifi cations dissipation is only 10mW with a 3V supply or 50mW with n Low Power: 10mW at 3V Supply a 5V supply. The LTC1198 automatically powers down 50mW at 5V Supply to a typical supply current of 1nA whenever it is not n Auto-Shutdown: 1nA Typical (LTC1198) performing conversions. These 8-bit switched-capacitor n ±1/2LSB Total Unadjusted Error over Temperature successive approximation ADCs include sample-and- n 3-Wire Serial I/O holds. The LTC1196 has a differential analog input; the n 1V to 5V Input Span Range (LTC1196) LTC1198 offers a software selectable 2-channel MUX. n Converts 1MHz Inputs to 7 Effective Bits The 3-wire serial I/O, SO-8 packages, 3V operation and n Differential Inputs (LTC1196) extremely high sample rate-to-power ratio make these n 2-Channel MUX (LTC1198) ADCs an ideal choice for compact, high speed systems. n SO-8 Plastic Package These ADCs can be used in ratiometric applications or with external references. The high impedance analog in-
APPLICATIONS
puts and the ability to operate with reduced spans below n High Speed Data Acquisition 1V full scale (LTC1196) allow direct connection to signal n Disk Drives sources in many applications, eliminating the need for n Portable or Compact Instrumentation gain stages. n Low Power or Battery-Operated Systems The A-grade devices are specifi ed with total unadjusted error of ±1/2LSB maximum over temperature. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION Single 5V Supply, 1Msps, 8-Bit Sampling ADC Effective Bits and S/(N + D) vs Input Frequency
8 50 1μF 5V VREF = VCC = 2.7V 7 44 fSMPL = 383kHz (LTC1196) fSMPL = 287kHz (LTC1198) 6 VREF = VCC = 5V S/(N + D) (dB) f 1 8 5 SMPL = 1MHz (LTC1196) CS V f CC SMPL = 750kHz (LTC1198) SERIAL DATA LINK TO 2 7 4 +IN CLK ASIC, PLD, MPU, DSP, ANALOG INPUT LTC1196 OR SHIFT REGISTERS 0V TO 5V RANGE 3 6 –IN DOUT 3 4 5 GND VREF 2 1196/98 TA01 1 EFFECTIVE NUMBER OF BITS (ENOBs) TA = 25°C 0 1k 10k 100k 1M INPUT FREQUENCY (Hz) 11968 TA01b 119698fb 1