LTC1404 Complete SO-8, 12-Bit, 600ksps ADC with Shutdown FEATURES DESCRIPTIO U ■ Complete 12-Bit ADC in SO-8 The LTC ®1404 is a complete 600ksps, 12-bit A/D con- ■ Single Supply 5V or ±5V Operation verter which draws only 75mW from 5V or ± 5V supplies. ■ Sample Rate: 600ksps This easy-to-use device comes complete with a 160ns ■ Power Dissipation: 75mW (Typ) sample-and-hold and a precision reference. Unipolar and ■ 72dB S/(N + D) and –80dB THD at Nyquist bipolar conversion modes add to the flexibility of the ADC. ■ No Missing Codes over Temperature The LTC1404 has two power saving modes: Nap and ■ Nap Mode with Instant Wake-Up: 7.5mW Sleep. In Nap mode, it consumes only 7.5mW of power ■ Sleep Mode: 60µW and can wake up and convert immediately. In the Sleep ■ High Impedance Analog Input mode, it consumes 60µW of power typically. Upon power- ■ Input Range (1mV/LSB): 0V to 4.096V or ± 2.048V up from Sleep mode, a reference ready (REFRDY) signal ■ Internal Reference Can Be Overdriven Externally is available in the serial data word to indicate that the ■ 3-Wire Interface to DSPs and Processors (SPI and reference has settled and the chip is ready to convert. TM MICROWIRE Compatible) The LTC1404 converts 0V to 4.096V unipolar inputs from U a single 5V supply and ±2.048V bipolar inputs from ±5V APPLICATIO S supplies. Maximum DC specs include ±1LSB INL, ±1LSB ■ High Speed Data Acquisition DNL and 45ppm/°C full-scale drift over temperature. Guaranteed AC performance includes 69dB S/(N + D) ■ Digital Signal Processing ■ Multiplexed Data Acquisition Systems and –76dB THD at an input frequency of 100kHz over ■ Audio and Telecom Processing temperature. ■ Digital Radio The 3-wire serial port allows compact and efficient data ■ Spectrum Analysis transfer to a wide range of microprocessors, microcontrollers ■ Low Power and Battery-Operated Systems and DSPs. ■ Handheld or Portable Instruments , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO U Single 5V Supply, 600kHz, 12-Bit Sampling A/D Converter Power Consumption vs Sample Rate 100 5V NORMAL CONVERSION + VCC VSS 10 10µF* 0.1µF NAP MODE BETWEEN CONVERSION LTC1404 MPU 1 ANALOG INPUT A (0V TO 4.096V) IN CONV P1.4 REF SLEEP MODE OUT V CLK P1.3 0.1 2.43V + REF BETWEEN CONVERSION 10 F 0.1 F GND D P1.2 µ µ OUT SUPPLY CURRENT (mA) SERIAL 0.01 DATA LINK 9.6MHz CLOCK *AVX TPSD106M035R0300 LTC1404 • TA01 0.001 0.01 0.1 1 10100 1k10k 100k 1M SAMPLE RATE (Hz) LTC1404 • TA02 1404fa 1 LTC1404 WW U W W U ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATIONU (Notes 1, 2) TOP VIEW Supply Voltage (VCC) ................................................. 7V Negative Supply Voltage (VSS) ................... –6V to GND VCC 1 8 VSS Total Supply Voltage (VCC to VSS) AIN 2 7 CONV Bipolar Operation Only ........................................ 12V VREF 3 6 CLK Analog Input Voltage (Note 3) GND 4 5 DOUT Unipolar Operation .................. –0.3V to (VCC + 0.3V) S8 PACKAGE 8-LEAD PLASTIC SO Bipolar Operation........... (VSS – 0.3V) to (VCC + 0.3V) T = 125°C, θ = 130°C/W Digital Input Voltage (Note 4) JMAX JA Unipolar Operation ................................–0.3V to 12V ORDER PART NUMBER S8 PART MARKING Bipolar Operation.........................(VSS – 0.3V) to 12V Digital Output Voltage LTC1404CS8 1404 LTC1404IS8 1404I Unipolar Operation .................. –0.3V to (VCC + 0.3V) Bipolar Operation........... (VSS – 0.3V) to (VCC + 0.3V) Order Options Tape and Reel: Add #TR Power Dissipation.............................................. 300mW Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Operating Ambient Temperature Range Lead Free Part Marking: http://www.linear.com/leadfree/ LTC1404C ............................................... 0°C to 70°C Consult LTC Marketing for parts specified with wider operating temperature ranges. LTC1404I............................................ –40°C to 85°C Junction Temperature.......................................... 125°C Storage Temperature Range ................. –65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U POWER REQUIRE EW TS The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Positive Supply Voltage Unipolar 4.75 5.25 V Bipolar 4.75 5.25 V VSS Negative Supply Voltage Bipolar Only –2.45 –5.25 V ICC Positive Supply Current fSAMPLE = 600ksps ● 15 30 mA Nap Mode ● 1.3 3.0 mA Sleep Mode ● 8.0 20.0 µA ISS Negative Supply Current fSAMPLE = 600ksps, VSS = – 5V ● 0.2 0.6 mA Nap Mode ● 0.2 0.5 mA Sleep Mode ● 410 µA PD Power Dissipation fSAMPLE = 600ksps ● 75 160 mW Nap Mode ● 7.5 20 mW Sleep Mode ● 60 150 µW U A U ALOG I PUT The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Analog Input Range 4.75V ≤ VCC ≤ 5.25V (Unipolar) 0 to 4.096 V 4.75V ≤ VCC ≤ 5.25V, –5.25V ≤ VSS ≤ –2.45V (Bipolar) 0 to ±2.048 V IIN Analog Input Leakage Current During Conversions (Hold Mode) ● ±1 µA CIN Analog Input Capacitance Between Conversions (Sample Mode) 45 pF During Conversions (Hold Mode) 5 pF 1404fa 2 LTC1404 CO VERTERU CCHARA TERISTICS The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. With internal reference VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified (Note 6). PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution (No Missing Codes) ● 12 Bits Integral Linearity Error (Note 7) ● ±1LSB Differential Linearity Error ● ±1LSB Offset Error (Note 8) ±6LSB ● ±8LSB Full-Scale Error ±15 LSB Full-Scale Tempco IOUT(REF) = 0 ● ±10 ±45 ppm/°C W DY AU IC ACCURACY The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, VSS = –5V, fSAMPLE = 600kHz. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS S/(N + D) Signal-to-Noise 100kHz Input Signal ● 69 72 dB 300kHz Input Signal 72 dB THD Total Harmonic Distortion 100kHz Input Signal ● –82 –76 dB Up to 5th Harmonic 300kHz Input Signal –80 dB Peak Harmonic or 100kHz Input Signal ● –84 –76 dB Spurious Noise 300kHz Input Signal –82 dB IMD Intermodulation Distortion fIN1 = 99.17kHz, fIN2 = 102.69kHz –82 dB fIN1 = 298.68kHz, fIN2 = 304.83kHz –70 dB Full Power Bandwidth 5 MHz Full Linear Bandwidth (S/(N + D) ≥ 68dB) 1 MHz UU IU TER AL REFERE CE CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS VREF Output Voltage IOUT = 0 2.410 2.430 2.450 V VREF Output Tempco IOUT = 0 ● ±10 ±45 ppm/°C VREF Line Regulation 4.75V ≤ VCC ≤ 5.25V 0.5 LSB/V –5.25V ≤ VSS ≤ 0V 0.01 LSB/V VREF Load Regulation 0 ≤ ⏐IOUT⏐ ≤ 1mA 1 LSB/mA VREF Wake-Up Time from Sleep Mode CVREF = 10µF 2.5 ms U DIGITAL I PUTSU AND OUTPUTS The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIH High Level Input Voltage VCC = 5.25V ● 2.0 V VIL Low Level Input Voltage VCC = 4.75V ● 0.8 V IIN Digital Input Current VIN = 0V to VCC ● ±10 µA CIN Digital Input Capacitance 5pF VOH High Level Output Voltage VCC = 4.75V, IO = –10µA 4.7 V VCC = 4.75V, IO = –200µA ● 4.0 V VOL Low Level Output Voltage VCC = 4.75V, IO = 160µA 0.05 V VCC = 4.75V, IO = 1.6mA ● 0.10 0.4 V 1404fa 3 LTC1404 U DIGITAL I PUTSU AND OUTPUTS The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IOZ Hi-Z Output Leakage DOUT VOUT = 0V to VCC ● ±10 µA COZ Hi-Z Output Capacitance DOUT 15 pF ISOURCE Output Source Current VOUT = 0V – 10 mA ISINK Output Sink Current VOUT = VCC 10 mA W TI IU G CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, unless otherwise noted specifications are at TA = 25°C. VCC = 5V, fSAMPLE = 600kHz, tr = tf = 5ns, unless otherwise specified. See Figures 12, 13, 14. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fSAMPLE(MAX) Maximum Sampling Frequency ● 600 kHz tCONV Conversion Time fCLK = 9.6MHz 1.36 µs tACQ Acquisition Time (Unipolar Mode) 200 ns (Bipolar Mode VSS = –5V) 160 ns fCLK CLK Frequency ● 0.1 9.6 MHz tCLK CLK Pulse Width (Notes 5 and 10) ● 40 ns tWK(NAP) Time to Wake Up from Nap Mode 350 ns t1 CLK Pulse Width to Return to Active Mode ● 40 ns t2 CONV↑ to CLK↑ Setup Time ● 70 ns t3 CONV↑ After Leading CLK↑ ● 0ns t4 CONV Pulse Width (Note 9) ● 40 ns t5 Time from CLK↑ to Sample Mode 60 ns t6 Aperture Delay of Sample-and-Hold Jitter < 50ps 40 ns t7 Minimum Delay Between Conversion (Unipolar Mode) (Note 5) ● 220 310 ns (Bipolar Mode VSS = –5V) ● 180 300 ns t8 Delay Time, CLK↑ to DOUT Valid CLOAD = 20pF ● 40 70 ns t9 Delay Time, CLK↑ to DOUT Hi-Z CLOAD = 20pF ● 40 70 ns t10 Time from Previous Data Remains Valid After CLK↑ CLOAD = 20pF ● 10 30 ns t11 Minimum Time Between Nap/Sleep Request to Wake Up Request (Notes 5 and 10) ● 50 ns Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 6: Linearity, offset and full-scale specifications apply for unipolar and may cause permanent damage to the device.