Datasheet LTC1279 (Analog Devices) - 5

LTC1279
W U TI I G CHARACTERISTICS (Note 5)
The ● indicates specifications which apply over the full operating
Note 7:
Integral nonlinearity is defined as the deviation of a code from a temperature range; all other limits and typicals T straight line passing through the actual endpoints of the transfer curve. The A = 25°C. deviation is measured from the center of the quantization band.
Note 1:
Absolute maximum ratings are those values beyond which the life of a device may be impaired.
Note 8:
Bipolar offset is the offset voltage measured from – 1/2LSB when the output code flickers between 0000 0000 0000 and 1111 1111 1111.
Note 2:
All voltage values are with respect to ground with DGND and AGND wired together (unless otherwise noted).
Note 9:
Guaranteed by design, not subject to test.
Note 3:
When the analog input voltage is taken below V
Note 10:
The AC test is for bipolar mode. The signal-to-noise plus SS (ground for unipolar mode) or above V distortion ratio is about 1dB lower for unipolar mode, so the typical DD, it will be clamped by internal diodes. This product can handle input currents greater than 80mA below V S/(N + D) at 100kHz in unipolar mode is 71dB. SS (ground for unipolar mode) or above VDD without latch-up.
Note 11:
Recommended operating conditions.
Note 4:
When these pin voltages are taken below VSS (ground for unipolar
Note 12:
AIN must not exceed VDD or fall below VSS by more than 50mV for mode), they will be clamped by internal diodes. This product can handle specified accuracy. Therefore the minimum supply voltage for the unipolar input currents greater than 60mA below VSS (ground for unipolar mode) mode is 4.95V. The minimum for the bipolar mode is 4.75V, – 2.45V. without latch-up. These pins are not clamped to VDD.
Note 13:
The falling CONVST edge starts a conversion. If CONVST returns
Note 5:
AVDD = DVDD = VDD = 5V, (VSS = – 5V for bipolar mode), fSAMPLE = high at a bit decision point during the conversion it can create small errors. 600kHz, tr = tf = 5ns unless otherwise specified. For best performance ensure that CONVST returns high either within 120ns
Note 6:
Linearity, offset and full scale specifications apply for unipolar and after conversion start (i.e., before the first bit decision) or after BUSY rises bipolar modes. (i.e., after the last bit test). See mode 1a and 1b (Figures 12 and 13) timing diagrams.
W U TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity vs Differential Nonlinearity vs ENOBs and S/(N + D) vs Output Code Output Code Input Frequency
1.0 1.0 12 74 f f SAMPLE = 600kHz SAMPLE = 600kHz 11 68 SIGNAL/(NOISE + DISTORTION) (dB) 10 62 NYQUIST 0.5 0.5 9 FREQUENCY 56 8 50 7 0 0 6 5 4 –0.5 –0.5 3 EFFECTIVE NUMBER OF BITS 2 INTEGRAL NONLINEARITY ERROR (LSB) 1 f DIFFERENTIAL NONLINEARITY ERROR (LSB) SAMPLE = 600kHz –1.0 –1.0 0 0 512 1024 1536 2048 2560 3072 3584 4096 0 512 1024 1536 2048 2560 3072 3584 4096 10k 100k 1M 5M OUTPUT CODE OUTPUT CODE FREQUENCY (Hz) 1279 G01 1279 G02 1279 G03 5