Datasheet LTC1863L, LTC1867L (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | Micropower, 3V, 16-Bit, 8-Channel 175ksps ADCs |
| Páginas / Página | 16 / 5 — TIMING CHARACTERISTICS The. denotes the specifications which apply over … |
| Formato / tamaño de archivo | PDF / 256 Kb |
| Idioma del documento | Inglés |
TIMING CHARACTERISTICS The. denotes the specifications which apply over the full operating temperature
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LTC1863L/LTC1867L
TIMING CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) Note 4:
When these pin voltages are taken below GND, they will be measured from –1/2LSB when output code flickers between 0000 0000 clamped by internal diodes. This product can handle input currents up to 0000 0000 and 1111 1111 1111 1111 for LTC1867L, and between 100mA below GND without latchup. These pins are not clamped to VDD. 0000 0000 0000 and 1111 1111 1111 for LTC1863L.
Note 5:
VDD = 2.7V, fSAMPLE = 175ksps and fSCK = 20MHz at 25°C,
Note 9:
Recommended operating conditions. The input range of ±1.25V t – – r = tf = 5ns and VIN = 1.25V for bipolar mode unless otherwise specified. for bipolar mode is measured with respect to VIN = 1.25V. For unipolar
Note 6:
Linearity, offset and gain error specifications apply for both mode, common mode input range is 0V to VDD for the positive input and unipolar and bipolar modes. The INL and DNL are tested in bipolar mode. 0V to 1.5V for the negative input. For bipolar mode, common mode input
Note 7:
Integral nonlinearity is defined as the deviation of a code from a range is 0V to VDD for both positive and negative inputs. straight line passing through the actual endpoints of the transfer curve.
Note 10:
Guaranteed by design, not subject to test. The deviation is measured from the center of the quantization band.
Note 11:
t2 of 47ns maximum allows fSCK up to 10MHz for rising capture
Note 8:
Unipolar offset is the offset voltage measured from +1/2LSB with 50% duty cycle and fSCK up to 20MHz for falling capture (with 3ns when the output code flickers between 0000 0000 0000 0000 and setup time for the receiving logic). 0000 0000 0000 0001 for LTC1867L and between 0000 0000 0000 and 0000 0000 0001 for LTC1863L. Bipolar offset is the offset voltage
TYPICAL PERFORMANCE CHARACTERISTICS (LTC1867L) Integral Nonlinearity Differential Nonlinearity 4096 Points FFT Plot vs Output Code vs Output Code (VDD = 2.7V, Internal REF)
2.0 2.0 0 VDD = 2.7V VDD = 2.7V fSAMPLE = 175ksps 1.5 fSAMPLE = 175ksps 1.5 fSAMPLE = 175ksps f –20 IN = 1kHz SNR = 82.9dB 1.0 1.0 SINAD = 81.4dB –40 THD = 86.8dB 0.5 0.5 –60 0 0 INL (LSB) DNL (LSB) –80 –0.5 –0.5 AMPLITUDE (dB) –100 –1.0 –1.0 –1.5 –1.5 –120 –2.0 –2.0 –140 0 16384 32768 49152 65536 0 16384 32768 49152 65536 0 21.875 43.75 65.625 87.5 OUTPUT CODE OUTPUT CODE FREQUENCY (kHz) 1863L7L G01 1863L7L G02 1863L7L G03
4096 Points FFT Plot Signal-to-(Noise + Distortion) (VDD = 3V, REFCOMP = Ext 3V) Crosstalk vs Input Frequency Ratio vs Input Frequency
0 –60 100 fSAMPLE = 175ksps VDD = 3V f f –20 IN = 1kHz –70 SAMPLE = 175ksps 90 SNR = 84.7dB SNR SINAD = 83.5dB –80 80 –40 THD = 90dB –90 70 –60 SINAD –100 60 –80 –110 ADJACENT PAIR 50 AMPLITUDE (dB) AMPLITUDE (dB) –100 –120 RESULTING AMPLITUDE ON SELECTED CHANNEL (dB) NONADJACENT 40 V –120 –130 PAIR DD = 3V 30 INTERNAL REF fSAMPLE = 175ksps –140 –140 20 0 21.875 43.75 65.625 87.5 0.1 1 10 100 1000 1 10 100 FREQUENCY (kHz) ACTIVE CHANNEL INPUT FREQUENCY (kHz) INPUT FREQUENCY (kHz) 1863L7L G05 1863L7L G04 1863L7L G06 1863l7lfe For more information www.linear.com/LTC1863L 5 Document Outline Description Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Package Description Related Parts
TIMING CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) Note 4:
When these pin voltages are taken below GND, they will be measured from –1/2LSB when output code flickers between 0000 0000 clamped by internal diodes. This product can handle input currents up to 0000 0000 and 1111 1111 1111 1111 for LTC1867L, and between 100mA below GND without latchup. These pins are not clamped to VDD. 0000 0000 0000 and 1111 1111 1111 for LTC1863L.
Note 5:
VDD = 2.7V, fSAMPLE = 175ksps and fSCK = 20MHz at 25°C,
Note 9:
Recommended operating conditions. The input range of ±1.25V t – – r = tf = 5ns and VIN = 1.25V for bipolar mode unless otherwise specified. for bipolar mode is measured with respect to VIN = 1.25V. For unipolar
Note 6:
Linearity, offset and gain error specifications apply for both mode, common mode input range is 0V to VDD for the positive input and unipolar and bipolar modes. The INL and DNL are tested in bipolar mode. 0V to 1.5V for the negative input. For bipolar mode, common mode input
Note 7:
Integral nonlinearity is defined as the deviation of a code from a range is 0V to VDD for both positive and negative inputs. straight line passing through the actual endpoints of the transfer curve.
Note 10:
Guaranteed by design, not subject to test. The deviation is measured from the center of the quantization band.
Note 11:
t2 of 47ns maximum allows fSCK up to 10MHz for rising capture
Note 8:
Unipolar offset is the offset voltage measured from +1/2LSB with 50% duty cycle and fSCK up to 20MHz for falling capture (with 3ns when the output code flickers between 0000 0000 0000 0000 and setup time for the receiving logic). 0000 0000 0000 0001 for LTC1867L and between 0000 0000 0000 and 0000 0000 0001 for LTC1863L. Bipolar offset is the offset voltage
TYPICAL PERFORMANCE CHARACTERISTICS (LTC1867L) Integral Nonlinearity Differential Nonlinearity 4096 Points FFT Plot vs Output Code vs Output Code (VDD = 2.7V, Internal REF)
2.0 2.0 0 VDD = 2.7V VDD = 2.7V fSAMPLE = 175ksps 1.5 fSAMPLE = 175ksps 1.5 fSAMPLE = 175ksps f –20 IN = 1kHz SNR = 82.9dB 1.0 1.0 SINAD = 81.4dB –40 THD = 86.8dB 0.5 0.5 –60 0 0 INL (LSB) DNL (LSB) –80 –0.5 –0.5 AMPLITUDE (dB) –100 –1.0 –1.0 –1.5 –1.5 –120 –2.0 –2.0 –140 0 16384 32768 49152 65536 0 16384 32768 49152 65536 0 21.875 43.75 65.625 87.5 OUTPUT CODE OUTPUT CODE FREQUENCY (kHz) 1863L7L G01 1863L7L G02 1863L7L G03
4096 Points FFT Plot Signal-to-(Noise + Distortion) (VDD = 3V, REFCOMP = Ext 3V) Crosstalk vs Input Frequency Ratio vs Input Frequency
0 –60 100 fSAMPLE = 175ksps VDD = 3V f f –20 IN = 1kHz –70 SAMPLE = 175ksps 90 SNR = 84.7dB SNR SINAD = 83.5dB –80 80 –40 THD = 90dB –90 70 –60 SINAD –100 60 –80 –110 ADJACENT PAIR 50 AMPLITUDE (dB) AMPLITUDE (dB) –100 –120 RESULTING AMPLITUDE ON SELECTED CHANNEL (dB) NONADJACENT 40 V –120 –130 PAIR DD = 3V 30 INTERNAL REF fSAMPLE = 175ksps –140 –140 20 0 21.875 43.75 65.625 87.5 0.1 1 10 100 1000 1 10 100 FREQUENCY (kHz) ACTIVE CHANNEL INPUT FREQUENCY (kHz) INPUT FREQUENCY (kHz) 1863L7L G05 1863L7L G04 1863L7L G06 1863l7lfe For more information www.linear.com/LTC1863L 5 Document Outline Description Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Package Description Related Parts