
PCM78
2
SPECIFICATIONS
ELECTRICAL
At T
C
= +25
°
C, +V
DD
= +5V, and
±
V
CC
=
±
12V, and one minute warm-up in convection environment, unless otherwise noted.
PCM78P
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RESOLUTION
16
Bits
INPUT/OUTPUT
ANALOG INPUT
Input Range
Input Impedance
–3
+3
V
k
1.5
DIGITAL INPUT/OUTPUT
Logic Family
Logic Level: V
IH
TTL Compatible CMOS
I
IH
= +40
μ
A
I
IL
= –100
μ
A
I
OH
= 2TTL Loads
I
OL
= 2TTL Loads
+2
0
+2.4
+5.5
+0.8
V
V
V
V
V
IL
V
OH
V
OL
+0.4
Data Format
Convert Command
Pulse Width
Serial BOB or BTC
Negative Edge
(1)
50
25
ns
CONVERSION TIME
4
5
μ
s
DYNAMIC CHARACTERISTICS
SIGNAL-TO-NOISE RATIO (SNR)
(2)
f = 1kHz (0dB)
f = 10kHz (0dB)
f
S
= 200kHz/T
= 4
μ
s
(3)
BW = 20kHz
BW = 100kHz
90
80
dB
(4)
dB
TOTAL HARMONIC DISTORTION
(5)
f = 1kHz (0dB)
f = 19kHz (0dB)
f = 10kHz (0dB)
f = 90kHz (0dB)
f
S
= 200kHz/T
= 4
μ
s
BW = 20kHz
BW = 20kHz
BW = 100kHz
BW = 100kHz
–91
–90
–90
–89
dB
dB
dB
dB
TOTAL HARMONIC DISTORTION + NOISE
(6)
f = 1kHz (0dB)
f = 1kHz (–20dB)
f = 1kHz (–60dB)
f = 19kHz (0dB)
f = 10kHz (0dB)
f = 90kHz (0dB)
f
S
= 200kHz/T
CONV
= 4
μ
s
BW = 20kHz
BW = 20kHz
BW = 20kHz
BW = 20kHz
BW = 100kHz
BW = 100kHz
–88
–74
–34
–87
–82
–81
–82
–68
dB
dB
dB
dB
dB
dB
TRANSFER CHARACTERISTICS
ACCURACY
Gain Error
Bipolar Zero Error
Differential Linearity Error
Integral Linearity Error
Missing Codes
±
2
±
20
±
0.002
±
0.003
None
%
mV
% of FSR
(7)
% of FSR
14 Bits
(8)
DRIFT
Gain
Bipolar Zero
0
°
C to +70
°
C
0
°
C to +70
°
C
±
25
±
4
ppm/
°
C
ppm of FSR/
°
C
POWER SUPPLY SENSITIVITY
+V
CC
–V
CC
+V
DD
±
0.008
±
0.003
±
0.003
%FSR/%V
CC
%FSR/%V
CC
%FSR/%V
DD
POWER SUPPLY REQUIREMENTS
Voltage Range: +V
CC
–V
CC
+V
DD
Current:
+V
CC
–V
CC
+V
DD
Power Dissipation
+4.75
–4.75
+4.75
+15.6
–15.6
+5.25
V
V
V
+V
CC
= +12V
–V
CC
= –12V
+V
DD
= +5V
±
V
CC
=
±
12V
+15
–21
+7
575
mA
mA
mA
mW
TEMPERATURE RANGE
Specification
Storage
Operating
0
+70
+100
+85
°
C
°
C
°
C
–50
–25
NOTES: (1) When convert command is high, converter is in a halt/reset mode. Actual conversion begins on negative edge. See detailed text on timing for convert
command description when using external clock. (2) Ratio of Noise rms/Signal rms. (3) f = input frequency; f
= sample frequency (PCM78P and SHC702 in
combination); BW = bandwidth of output (based on FFT or actual analog reconstruction using a 20kHz low-pass filter). (4) Referred to input signal level. (5) Ratio
of Distortion rms/Signal rms. (6) Ratio of Distortion rms + Noise rms/Signal rms. (7) FSR: Full-Scale Range = 6Vp-p. (8) Typically no missing Codes at 14-bit
resolution.