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LTC1850IFW#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
4
LTC1850/LTC1851
18501f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
DD
= 5.25V ● 2.4 V
V
IL
Low Level Input Voltage V
DD
= 4.75V ● 0.8 V
I
IN
Digital Input Current V
IN
= 0V to V
DD
● ±5 µA
C
IN
Digital Input Capacitance 2pF
V
OH
High Level Output Voltage V
DD
= 4.75V, I
O
= –10µA 4.5 V
V
DD
= 4.75V, I
O
= –200µA ● 4.0 V
V
OL
Low Level Output Voltage V
DD
= 4.75V, I
O
= 160µA 0.05 V
V
DD
= 4.75V, I
O
= 1.6mA ● 0.10 0.4 V
I
OZ
Hi-Z Output Leakage D11 to D0, AD
OUT
, A1
OUT
, A2
OUT
, DIFF
OUT
V
OUT
= 0V to V
DD
, CS High ● ±10 µA
C
OZ
Hi-Z Capacitance D11 to D0, AD
OUT
, A1
OUT
, A2
OUT
, DIFF
OUT
CS High (Note 9) ● 15 pF
I
SOURCE
Output Source Current V
OUT
= 0V –20 mA
I
SINK
Output Sink Current V
OUT
= V
DD
30 mA
The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
DIGITAL I PUTS A D DIGITAL OUTPUTS
UU
PARAMETER CONDITIONS MIN TYP MAX UNITS
REFOUT Output Voltage I
OUT
= 0 2.48 2.50 2.52 V
REFOUT Output Temperature Coefficient I
OUT
= 0 ±15 ppm/°C
REFOUT Line Regulation 0.01 LSB/V
Reference Buffer Gain V
REFCOMP
/V
REFIN
1.636 1.638 1.640 V/V
REFCOMP Output Voltage External 2.5V Reference 4.090 4.096 4.100 V
Internal 2.5V Reference 4.060 4.096 4.132 V
REFCOMP Impedance REFIN = V
DD
6.4 kΩ
T
A
= 25°C. (Notes 5, 6)
I TER AL REFERE CE
UU U
LTC1850 LTC1851
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 47kHz Input Signal
Unipolar, PGA = 0 61.6 71 dB
Unipolar, PGA = 1 61.7 72 dB
Bipolar, PGA = 0 61.6 71 dB
Bipolar, PGA = 1 61.7 72 dB
S/(N+D) Signal-to-(Noise + Distortion) Ratio 47kHz Input Signal
Unipolar, PGA = 0 61.0 70 dB
Unipolar, PGA = 1 61.0 71 dB
Bipolar, PGA = 0 61.0 71 dB
Bipolar, PGA = 1 61.2 72 dB
THD Total Harmonic Distortion 47kHz Input Signal,
Unipolar, PGA = 0 First 5 Harmonics –76 –80 dB
Unipolar, PGA = 1 –78 –82 dB
Bipolar, PGA = 0 –81 –87 dB
Bipolar, PGA = 1 –80 –86 dB
SFDR Spurious-Free Dynamic Range 47kHz Input Signal
Unipolar, PGA = 0 74 82 dB
Unipolar, PGA = 1 80 86 dB
Bipolar, PGA = 0 84 90 dB
Bipolar, PGA = 1 82 88 dB
DY A IC ACCURACY
U
W
(Note 5)
5
LTC1850/LTC1851
18501f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SAMPLE(MAX)
Maximum Sampling Frequency ● 1.25 MHz
Acquisition + Conversion
● 800 ns
t
CONV
Conversion Time ● 650 ns
t
ACQ
Acquisition Time ● 150 ns
t
1
CS to RD Setup Time (Notes 9, 10) ● 0ns
t
2
CS to CONVST Setup Time (Notes 9, 10) ● 10 ns
t
3
CS to SHDN Setup Time (Notes 9, 10) 200 ns
t
4
SHDN to CONVST Wake-Up Time Nap Mode (Note 10) 200 ns
Sleep Mode, 10µF REFCOMP 10 ms
Bypass Capacitor (Note 10)
t
5
CONVST Low Time (Notes 10, 11) ● 50 ns
t
6
CONVST to BUSY Delay C
L
= 25pF 10 ns
● 60 ns
t
7
Data Ready Before BUSY 20 35 ns
● 15 ns
t
8
Delay Between Conversions (Note 10) ● 50 ns
t
9
Wait Time RD After BUSY ● –5 ns
t
10
Data Access Time After RD C
L
= 25pF 20 35 ns
● 45 ns
C
L
= 100pF 25 45 ns
● 60 ns
t
11
BUS Relinquish Time 10 30 ns
0°C to 70°C
● 35 ns
–40°C to 85°C
● 40 ns
t
12
RD Low Time ● t
10
ns
t
13
CONVST High Time (Note 10) ● 50 ns
t
14
Latch Setup Time (Notes 9, 10) ● 10 ns
t
15
Latch Hold Time (Notes 9, 10) ● 10 ns
t
16
WR Low Time (Note 10) ● 50 ns
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
TI I G CHARACTERISTICS
UW
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
POWER REQUIRE E TS
WU
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Positive Supply Voltage (Note 10) ● 4.75 5.25 V
OV
DD
Output Positive Supply Voltage (Note 10) ● 2.7 5.25 V
I
DD
Positive Supply Current V
DD
= V
DD
= OV
DD
= 5V, ● 810mA
f
SAMPLE
= 1.25MHz
P
DISS
Power Dissipation ● 40 50 mW
Power Down Positive Supply Current
Nap Mode SHDN = 0V, CS = 0V 1 mA
Sleep Mode SHDN = 0V, CS = 5V 50 µA
Power Down Power Dissipation
Nap Mode SHDN = 0V, CS = 0V 5 mW
Sleep Mode SHDN = 0V, CS = 5V 0.25 mW
6
LTC1850/LTC1851
18501f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
17
WR High Time (Note 10) ● 50 ns
t
18
M1 to M0 Setup Time (Notes 9, 10) ● 10 ns
t
19
M0 to BUSY Delay M1 High 20 ns
t
20
M0 to WR (or RD) Setup Time (Notes 9, 10) ● t
19
ns
t
21
M0 High Pulse Width (Note 10) ● 50 ns
t
22
RD High Time Between Readback Reads (Note 10) ● 50 ns
t
23
Last WR (or RD) to M0 (Note 10) ● 10 ns
t
24
M0 to RD Setup Time (Notes 9, 10) ● t
19
ns
t
25
M0 to CONVST (Note 10) ● t
19
ns
t
26
Aperture Delay –0.5 ns
t
27
Aperture Jitter 2ps
RMS
Note 1: Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to ground with GND, OGND and
GND wired together unless otherwise noted.
Note 3: When these pin voltages are taken below ground or above V
DD
,
they will be clamped by internal diodes. This product can handle input
currents of 100mA below ground or above V
DD
without latchup.
Note 4: When these pin voltages are taken below ground, they will be
clamped by internal diodes. This product can handle input currents of
100mA below ground without latchup. These pins are not clamped to V
DD
.
Note 5: V
DD
= 4.75V to 5.25V, f
SAMPLE
= 1.25MHz, t
r
= t
f
= 2ns unless
otherwise specified.
Note 6: Linearity, offset and full-scale specifications apply for a single-
ended input on any channel with COM grounded.
Note 7: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual end points of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 8: Bipolar offset is the offset voltage measured from –0.5LSB when
the output code flickers between 0111 1111 1111 and 1000 0000 0000 for
LTC1851 and between 01 1111 1111 and 10 0000 0000 for LTC1850.
Note 9: Guaranteed by design, not subject to test.
Note 10: Recommended operating conditions.
Note 11: The falling CONVST edge starts a conversion. If CONVST returns
high at a critical point during the conversion it can create small errors. For
the best results, ensure that CONVST returns high either within 400ns
after the start of the conversion or after BUSY rises.
Note 12: The analog input range is determined by the voltage on
REFCOMP. The gain error specification is tested with an external 4.096V
but is valid for any value of REFCOMP.
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
TI I G CHARACTERISTICS
UW
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LTC1850IFW#TRPBF

Mfr. #:
Buy LTC1850IFW#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 10-bit, 8-ch. Parallel 1.25Msps ADC
Lifecycle:
New from this manufacturer.
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