NOTES: (1) With fixed 50Ω resistor from REF OUT to REF IN. This parameter is also adjustable to zero at +25°C. (2) FS in this specification table means Full Scale
Range. That is, for a
±10V
input range, FS means 20V; for a 0 to +10V range, FS means 10V. (3) Maximum error at T
MIN
and T
MAX
. (4) Based on using V
EE
= +5V,
which starts a conversion immediately upon a convert command. Using V
EE
= 0V to –15V makes the ADS574/ADS774 emulate standard ADC574 operation. In this
mode, the internal sample/hold acquires the input signal after receiving the convert command, and does not assume that the input level has been stable before
the convert command arrives. (5) Using internal reference. (6) This is worst case change in accuracy from accuracy with a +5V supply. (7) V
EE
is optional, and
is only used to set the mode for the internal sample/hold. When V
EE
= –15V, I
EE
= –1mA typ; when V
EE
= 0V, I
EE
=
±5µA
typ; when V
EE
= +5V, I
EE
= +167µA typ.
DICE INFORMATION
PAD
1A, 1B
2
3
4
5
6
7
8
9A, 9B
10
11
12
13
14
FUNCTION
V
DD
12/8
CS
A
O
R/C
CE
NC
2.5V Ref Out
Analog Common
2.5 Ref In
V
EE
(Mode Control)
Bipolar Offset
10V Range
20V Range
PAD
15
16
17
18
19
20
21
22
23
24
25
26
27
28
FUNCTION
Digital Common
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11 (MSB)
Status
Substrate Bias:
+V
DD
NC: No Connection.
MECHANICAL INFORMATION
MILS (0.001")
Die Size
Die Thickness
Min. Pad Size
Metalization
172 x 142
±5
20
±3
4x4
MILLIMETERS
4.37 x 3.61
±0.13
0.51
±0.08
0.10 x 0.10
Aluminum
ADS574 DIE TOPOGRAPHY
®
3
ADS574
TYPICAL PERFORMANCE CURVES
T
A
= +25°C, V
DD
= V
EE
= +5V; Bipolar
±10V
Input Range; sampling frequency of 40kHz; unless otherwise specified. All plots use 4096 point FFTs.
FREQUENCY SPECTRUM (±10V, 2kHz Input)
0
–20
Signal/(Noise + Distortion) (dB)
SIGNAL/(NOISE + DISTORTION) vs
INPUT FREQUENCY AND AMBIENT TEMPERATURE
75
S/(N + D) = 73.1dB
THD = –94.5dB
SNR = 73.1dB
Magnitude (dB)
–40
–60
–80
–100
–120
0
5
10
Frequency (kHz)
15
20
–55°C
70
+125°C
+25°C
65
0.1
1
10
100
Input Frequency (kHz)
FREQUENCY SPECTRUM (±10V, 19kHz Input)
0
–20
Magnitude (dB)
FREQUENCY SPECTRUM (±1V, 19kHz Input)
0
S/(N + D) = 53.3dB
THD = –74.5dB
SNR = 53.3dB
S/(N + D) = 68.4dB
THD = –75.9dB
SNR = 69.3dB
Magnitude (dB)
–20
–40
–60
–80
–100
–120
–40
–60
–80
–100
–120
0
5
10
Frequency (kHz)
15
20
0
5
10
Frequency (kHz)
15
20
Spurious Free Dynamic Range, SNR, THD (dB)
SPURIOUS FREE DYNAMIC RANGE, SNR AND THD
vs INPUT FREQUENCY
POWER SUPPLY REJECTION
vs SUPPLY RIPPLE FREQUENCY
90
Power Supply Rejection Ratio (V/V in dB)
100
80
60
80
40
70
20
60
0.1
1
10
100
Input Frequency (kHz)
10
10
100
1k
10k
100k
1M
10M
Supply Ripple Frequency (Hz)
®
ADS574
4
CONNECTION DIAGRAM
+5VDC Supply
(V
DD
)
–
12/8
CS
A
O
–
R/C
CE
NC*
2.5V Ref
Out
Analog
Common
2.5V Ref
In
V
EE
(Mode Control)
1
2
3
4
5
6
7
8
9
10
11
2.5V
Reference
12 Bits
Control
Logic
Power-Up Reset
28
27
Status
DB11 (MSB)
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0 (LSB)
Digital
Common
Nibble A
Three-State Buffers and Control
Nibble B
Nibble C
12
Bits
26
25
24
23
22
21
20
19
18
17
16
15
Bipolar 12
Offset
10V Range 13
20V Range
14
–
CDAC
+
*Not Internally Connected
ABSOLUTE MAXIMUM RATINGS
V
EE
to Digital Common ....................................................... +V
DD
to –16.5V
V
DD
to Digital Common ............................................................... 0V to +7V
Analog Common to Digital Common ....................................................
±1V
Control Inputs (CE, CS, A
O
, 12/8, R/C)
to Digital Common ................................................... –0.5V to V
DD
+0.5V
Analog Inputs (Ref In, Bipolar Offset, 10V
IN
)
to Analog Common ......................................................................
±16.5V
20V
IN
to Analog Common ...................................................................
±24V
Ref Out .......................................................... Indefinite Short to Common,
Momentary Short to V
DD
Max Junction Temperature ............................................................ +165°C
Power Dissipation ........................................................................ 1000mW
Lead Temperature (soldering,10s) ................................................. +300°C
