Datasheet LTC1852, LTC1853 (Analog Devices) - 3
| Hersteller | Analog Devices |
| Beschreibung | 8-Channel, 10-Bit/12-Bit, 400ksps, Low Power, Sampling ADCs |
| Seiten / Seite | 24 / 3 — CONVERTER CHARACTERISTICS. The. denotes the specifi cations which apply … |
| Dateiformat / Größe | PDF / 246 Kb |
| Dokumentensprache | Englisch |
CONVERTER CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC1852/LTC1853
CONVERTER CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VDD = 2.7V to 5.5V, REFCOMP < VDD (Notes 5,6) LTC1852 LTC1853 PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Resolution (No Missing Codes) l 10 12 Bits Integral Linearity Error (Note 7) l ±0.25 ±1 ±0.35 ±1 LSB Differential Linearity Error l ±0.25 ±1 ±0.25 ±1 LSB Offset Error (Bipolar and Unipolar) (Note 8) Gain = 1 (PGA = 1) REFCOMP ≥ 2V l ±0.5 ±2 ±1 ±6 LSB Gain = 2 (PGA = 0) l ±1 ±4 ±2 ±12 LSB Offset Error Match (Bipolar and Unipolar) ±0.5 ±1 LSB Unipolar Gain Error With External 4.096V Reference Gain = 1 (PGA = 1) Applied to REFCOMP (Note 12) ±2 ±4 LSB Gain = 2 (PGA = 0) VDD = 4.75V to 5.25V, fS ≤ 400kHz ±4 ±8 LSB Unipolar Gain Error Match ±0.5 ±1 LSB Bipolar Gain Error With External 4.096V Reference Gain = 1 (PGA = 1) Applied to REFCOMP (Note 12) ±2 ±4 LSB Gain = 2 (PGA = 0) VDD = 4.75V to 5.25V, fS ≤ 400kHz ±4 ±8 LSB Bipolar Gain Error Match ±0.5 ±1 LSB Unipolar Gain Error With External 2.5V Reference Gain = 1 (PGA = 1) Applied to REFCOMP l ±1 ±3 ±1.5 ±8 LSB Gain = 2 (PGA = 0) VDD = 2.7V to 5.5V, fS ≤ 250kHz l ±2 ±6 ±3 ±16 LSB Bipolar Gain Error With External 2.5V Reference Gain = 1 (PGA = 1) Applied to REFCOMP l ±1 ±3 ±1.5 ±8 LSB Gain = 2 (PGA = 0) VDD = 2.7V to 5.5V, fS ≤ 250kHz l ±2 ±6 ±3 ±16 LSB Full-Scale Error Temperature Coeffi cient 15 15 ppm/°C
ANALOG INPUT The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Notes 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Analog Input Range (Note 9) 2.7V ≤ VDD ≤ 5.5V, REFCOMP ≤ VDD Unipolar, Gain = 1 (PGA = 1) 0 – REFCOMP V Unipolar, Gain = 2 (PGA = 0) 0 – REFCOMP/2 V Bipolar, Gain = 1 (PGA = 1) ± REFCOMP/2 V Bipolar, Gain = 2 (PGA = 0) ±REFCOMP/4 V IIN Analog Input Leakage Current l ±1 μA CIN Analog Input Capacitance Between Conversions (Gain = 1) 15 pF Between Conversions (Gain = 2) 25 pF During Conversions 5 pF tACQ Sample-and-Hold Acquisition Time 50 150 ns tS(MUX) Multiplexer Settling Time (Includes tACQ) 50 150 ns tAP Sample-and-Hold Aperture Delay Time VDD = 5V – 0.5 ns tjitter Sample-and-Hold Aperture Delay Time Jitter VDD = 5V 2 psRMS CMRR Analog Input Common Mode Rejection Ratio 60 dB
DYNAMIC ACCURACY TA = 25°C. (Notes 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 40kHz Input Signal 72.5 dB THD Total Harmonic Distortion 40kHz Input Signal, First 5 Harmonics –80 dB SFDR Spurious Free Dynamic Range 40kHz Input Signal –85 dB 18523fa 3
CONVERTER CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VDD = 2.7V to 5.5V, REFCOMP < VDD (Notes 5,6) LTC1852 LTC1853 PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Resolution (No Missing Codes) l 10 12 Bits Integral Linearity Error (Note 7) l ±0.25 ±1 ±0.35 ±1 LSB Differential Linearity Error l ±0.25 ±1 ±0.25 ±1 LSB Offset Error (Bipolar and Unipolar) (Note 8) Gain = 1 (PGA = 1) REFCOMP ≥ 2V l ±0.5 ±2 ±1 ±6 LSB Gain = 2 (PGA = 0) l ±1 ±4 ±2 ±12 LSB Offset Error Match (Bipolar and Unipolar) ±0.5 ±1 LSB Unipolar Gain Error With External 4.096V Reference Gain = 1 (PGA = 1) Applied to REFCOMP (Note 12) ±2 ±4 LSB Gain = 2 (PGA = 0) VDD = 4.75V to 5.25V, fS ≤ 400kHz ±4 ±8 LSB Unipolar Gain Error Match ±0.5 ±1 LSB Bipolar Gain Error With External 4.096V Reference Gain = 1 (PGA = 1) Applied to REFCOMP (Note 12) ±2 ±4 LSB Gain = 2 (PGA = 0) VDD = 4.75V to 5.25V, fS ≤ 400kHz ±4 ±8 LSB Bipolar Gain Error Match ±0.5 ±1 LSB Unipolar Gain Error With External 2.5V Reference Gain = 1 (PGA = 1) Applied to REFCOMP l ±1 ±3 ±1.5 ±8 LSB Gain = 2 (PGA = 0) VDD = 2.7V to 5.5V, fS ≤ 250kHz l ±2 ±6 ±3 ±16 LSB Bipolar Gain Error With External 2.5V Reference Gain = 1 (PGA = 1) Applied to REFCOMP l ±1 ±3 ±1.5 ±8 LSB Gain = 2 (PGA = 0) VDD = 2.7V to 5.5V, fS ≤ 250kHz l ±2 ±6 ±3 ±16 LSB Full-Scale Error Temperature Coeffi cient 15 15 ppm/°C
ANALOG INPUT The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Notes 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Analog Input Range (Note 9) 2.7V ≤ VDD ≤ 5.5V, REFCOMP ≤ VDD Unipolar, Gain = 1 (PGA = 1) 0 – REFCOMP V Unipolar, Gain = 2 (PGA = 0) 0 – REFCOMP/2 V Bipolar, Gain = 1 (PGA = 1) ± REFCOMP/2 V Bipolar, Gain = 2 (PGA = 0) ±REFCOMP/4 V IIN Analog Input Leakage Current l ±1 μA CIN Analog Input Capacitance Between Conversions (Gain = 1) 15 pF Between Conversions (Gain = 2) 25 pF During Conversions 5 pF tACQ Sample-and-Hold Acquisition Time 50 150 ns tS(MUX) Multiplexer Settling Time (Includes tACQ) 50 150 ns tAP Sample-and-Hold Aperture Delay Time VDD = 5V – 0.5 ns tjitter Sample-and-Hold Aperture Delay Time Jitter VDD = 5V 2 psRMS CMRR Analog Input Common Mode Rejection Ratio 60 dB
DYNAMIC ACCURACY TA = 25°C. (Notes 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 40kHz Input Signal 72.5 dB THD Total Harmonic Distortion 40kHz Input Signal, First 5 Harmonics –80 dB SFDR Spurious Free Dynamic Range 40kHz Input Signal –85 dB 18523fa 3