Datasheet LTC1852, LTC1853 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 8-Channel, 10-Bit/12-Bit, 400ksps, Low Power, Sampling ADCs |
| Pages / Page | 24 / 6 — TIMING CHARACTERISTICS. The. denotes the specifi cations which apply over … |
| File Format / Size | PDF / 246 Kb |
| Document Language | English |
TIMING CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating temperature
Model Line for this Datasheet
Text Version of Document
LTC1852/LTC1853
TIMING CHARACTERISTICS The
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t13 CONVST High Time (Note 10) ● 50 ns t14 Latch Setup Time (Note 10) ● 10 ns t15 Latch Hold Time (Notes 9, 10) ● 10 ns t16 WR Low Time (Note 10) ● 50 ns t17 WR High Time (Note 10) ● 50 ns t18 M1 to M0 Setup Time (Notes 9, 10) ● 10 ns t19 M0 to BUSY Delay M1 High 20 ns t20 M0 to WR (or RD) Setup Time (Notes 9, 10) ● t19 ns t21 M0 High Pulse Width (Note 10) ● 50 ns t22 RD High Time Between Readback Reads (Note 10) ● 50 ns t23 Last WR (or RD) to M0 (Note 10) ● 10 ns t24 M0 to RD Setup Time (Notes 9, 10) ● t19 ns t25 M0 to CONVST (Note 10) ● t19 ns t26 Aperture Delay – 0.5 ns t27 Aperture Jitter 2 psRMS
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings straight line passing through the actual end points of the transfer curve. may cause permanent damage to the device. Exposure to any Absolute The deviation is measured from the center of the quantization band. Maximum Rating condition for extended periods may affect device
Note 8:
Bipolar offset is the offset voltage measured from – 0.5LSB when reliability and lifetime. the output code fl ickers between 1111 1111 1111 and 0000 0000 0000.
Note 2:
All voltage values are with respect to ground with OGND and GND For the LTC1853 and between 11 1111 1111 and 00 0000 0000 for the wired together unless otherwise noted. LTC1852.
Note 3:
When these pin voltages are taken below ground or above VDD,
Note 9:
Guaranteed by design, not subject to test. they will be clamped by internal diodes. This product can handle input
Note 10:
Recommended operating conditions. currents of 100mA below ground or above VDD without latchup.
Note 11:
The falling CONVST edge starts a conversion. If CONVST returns
Note 4:
When these pin voltages are taken below ground, they will be high at a critical point during the conversion it can create small errors. clamped by internal diodes. This product can handle input currents of For the best results, ensure that CONVST returns high either within 400ns 100mA below ground without latchup. These pins are not clamped to VDD. after the start of the conversion or after BUSY rises.
Note 5:
VDD = 5V, fSAMPLE = 400kHz, tr = tf = 2ns unless otherwise
Note 12:
The analog input range is determined by the voltage on specifi ed. REFCOMP. The gain error specifi cation is tested with an external 4.096V
Note 6:
Linearity, offset and full-scale specifi cations apply for a single- but is valid for any value of REFCOMP greater than 2V and less than ended input on any channel with COM grounded. (VDD – 0.5V.)
Note 7:
Integral nonlinearity is defi ned as the deviation of a code from a
Note 13:
MUX address is updated immediately after BUSY falls.
TYPICAL PERFORMANCE CHARACTERISTICS 8192 Point FFT with Differential Linearity fIN = 39.599kHz
1.0 0 –20 0.5 –40 0 –60 DNL ERROR (LBS) AMPLITUDE (dB) –80 –0.5 –100 –1.0 –120 0 4096 0 200 CODE FREQUENCY (kHz) 1852 F02 1852 F03 18523fa 6
TIMING CHARACTERISTICS The
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t13 CONVST High Time (Note 10) ● 50 ns t14 Latch Setup Time (Note 10) ● 10 ns t15 Latch Hold Time (Notes 9, 10) ● 10 ns t16 WR Low Time (Note 10) ● 50 ns t17 WR High Time (Note 10) ● 50 ns t18 M1 to M0 Setup Time (Notes 9, 10) ● 10 ns t19 M0 to BUSY Delay M1 High 20 ns t20 M0 to WR (or RD) Setup Time (Notes 9, 10) ● t19 ns t21 M0 High Pulse Width (Note 10) ● 50 ns t22 RD High Time Between Readback Reads (Note 10) ● 50 ns t23 Last WR (or RD) to M0 (Note 10) ● 10 ns t24 M0 to RD Setup Time (Notes 9, 10) ● t19 ns t25 M0 to CONVST (Note 10) ● t19 ns t26 Aperture Delay – 0.5 ns t27 Aperture Jitter 2 psRMS
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings straight line passing through the actual end points of the transfer curve. may cause permanent damage to the device. Exposure to any Absolute The deviation is measured from the center of the quantization band. Maximum Rating condition for extended periods may affect device
Note 8:
Bipolar offset is the offset voltage measured from – 0.5LSB when reliability and lifetime. the output code fl ickers between 1111 1111 1111 and 0000 0000 0000.
Note 2:
All voltage values are with respect to ground with OGND and GND For the LTC1853 and between 11 1111 1111 and 00 0000 0000 for the wired together unless otherwise noted. LTC1852.
Note 3:
When these pin voltages are taken below ground or above VDD,
Note 9:
Guaranteed by design, not subject to test. they will be clamped by internal diodes. This product can handle input
Note 10:
Recommended operating conditions. currents of 100mA below ground or above VDD without latchup.
Note 11:
The falling CONVST edge starts a conversion. If CONVST returns
Note 4:
When these pin voltages are taken below ground, they will be high at a critical point during the conversion it can create small errors. clamped by internal diodes. This product can handle input currents of For the best results, ensure that CONVST returns high either within 400ns 100mA below ground without latchup. These pins are not clamped to VDD. after the start of the conversion or after BUSY rises.
Note 5:
VDD = 5V, fSAMPLE = 400kHz, tr = tf = 2ns unless otherwise
Note 12:
The analog input range is determined by the voltage on specifi ed. REFCOMP. The gain error specifi cation is tested with an external 4.096V
Note 6:
Linearity, offset and full-scale specifi cations apply for a single- but is valid for any value of REFCOMP greater than 2V and less than ended input on any channel with COM grounded. (VDD – 0.5V.)
Note 7:
Integral nonlinearity is defi ned as the deviation of a code from a
Note 13:
MUX address is updated immediately after BUSY falls.
TYPICAL PERFORMANCE CHARACTERISTICS 8192 Point FFT with Differential Linearity fIN = 39.599kHz
1.0 0 –20 0.5 –40 0 –60 DNL ERROR (LBS) AMPLITUDE (dB) –80 –0.5 –100 –1.0 –120 0 4096 0 200 CODE FREQUENCY (kHz) 1852 F02 1852 F03 18523fa 6
