TS8387
500 MSPS 8-BIT A/D CONVERTER
DESCRIPTION
The TS8387 is a monolithic 8-bit analog-to-digital con-
verter, designed for digitizing wide bandwidth analog
signals at very high sampling rates of up to 500 MSPS.
The TS8387 is using an innovative architecture, includ-
ing an on chip Sample and Hold (S/H), and is manufac-
tured with an advanced high speed bipolar process
(B6HF from Siemens).
The on-chip S/H has a 1.8 GHz full power input band-
width, providing excellent dynamic performance in
undersampling applications (High IF digitizing).
MAIN FEATURES
H8-bit
resolution.
Hfull
power input bandwidth 1.2 GHz.
H500
MSPS sampling rate.
HF
S
= 200 MSPS, F
IN
= 50 MHz :
SINAD= 46 dB ( 7.4 Effective Bits) SFDR = 58 dBc
HF
S
= 500 MSPS, F
IN
= 250 MHz :
SINAD= 46 dB ( 7.4 Effective Bits ) SFDR = 58 dBc
H
F
S
= 500 MSPS, F
IN
= 1000 MHz :
SINAD = 35.4 dB ( 5.6 Effective Bits) SFDR = 37 dBc
H
2 tone IMD : –53dBc (199MHz,200MHz) @ 500Msps
HDNL
= 0.4 LSB
INL = 0.7 LSB.
HLow
Bit Error Rate (10
–18
)
@
500 MSPS
HVery
low input capacitance : 3 pF
H500
mVpp differential or single ended analog inputs.
HDifferential
or single-ended 50
W
ECL compatible clock
inputs.
HECL
or Low Voltage Differential Outputs Signals.
HPower
consumption :
3 W (Tj = 70°C)
3.2 W @ Tj =125°C
Evaluation Board :
AVAILABLE
TSEV8387F :
Detailed specification on request
F Suffix
CQFP 68
Ceramic Quad Flat Pack
HDual
power supply :
±
5 V
HGray
or Binary output data format select.
HRadiation
tolerance oriented design
(more than 100 Krad(Si) expected).
APPLICATIONS
HDigital
Sampling Oscilloscopes.
HSatellite
receiver.
HElectronic
countermeasures / Electronic warfare.
HDirect
RF down - conversion.
August 98
1/38
SCREENING
HStandard
flow.
HMIL-STD-883,
class B (TBC).
HSpace
level (TBC).
TS8387
TABLE OF CONTENTS
PAGE
1. SIMPLIFIED BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1.
3.2.
3.3.
3.4.
3.5.
3.6.
3.7.
4.1.
4.2.
4.3.
4.4.
5.1.
5.2.
5.3.
5.4.
5.5.
ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECOMMENDED CONDITIONS OF USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL OPERATING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXPLANATION OF TEST LEVELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INDUSTRIAL WAFER SCREENING LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUNCTIONS DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIGITAL CODING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TS8387 PIN DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TS8387 PINOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OUTLINE DIMENSIONS - 68 PINS CQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THERMAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STATIC LINEARITY - FS = 50 MSPS / FIN = 10 MHZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EFFECTIVE NUMBER OF BITS VERSUS POWER SUPPLIES VARIATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TYPICAL FFT RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADC UNDERSAMPLING CAPABILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DYNAMIC PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
5
10
10
11
11
12
13
14
15
17
18
19
20
21
4. PACKAGE DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5. TYPICAL CHARACTERIZATION RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6. DEFINITION OF TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7. APPLYING THE TS8387 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1. TIMING INFORMATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.1.
TIMING VALUE FOR TS8387F : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.2.
PROPAGATION TIME CONSIDERATIONS : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.3.
TOD -TDR VARIATION OVER TEMPERATURE : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.4.
PRINCIPLE OF OPERATION : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2. ANALOG INPUTS (VIN) (VINB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3. CLOCK INPUTS (CLK) (CLKB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.3.1.
DIFFERENTIAL ECL CLOCKS INPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.3.2.
SINGLE ENDED ECL CLOCK INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.3.3.
SINGLE ENDED CLOCK INPUT (GROUND COMMON MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.4. CLOCK SIGNAL DUTY CYCLE ADJUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.5. NOISE IMMUNITY INFORMATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.6. DIGITAL OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.7. OUT OF RANGE BIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.8. GRAY OR BINARY OUTPUT DATA FORMAT SELECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.9. DIODE PIN 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.10. OPTIONAL ADC GAIN CONTROL PIN 60 (NON ACCESSIBLE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8. EQUIVALENT INPUT / OUTPUT SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.1.
8.2.
8.3.
8.4.
EQUIVALENT ANALOG INPUT CIRCUIT AND ESD PROTECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EQUIVALENT ANALOG CLOCK INPUT CIRCUIT AND ESD PROTECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EQUIVALENT DATA OUTPUT BUFFER CIRCUIT AND ESD PROTECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GORB EQUIVALENT INPUT SCHEMATIC AND ESD PROTECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
32
33
33
9. TSEV8387F : CHIP EVALUATION BOARD (see separate TSEV8387F specification) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10. ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11. STATUS (August 1998) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2/38
TS8387
1. SIMPLIFIED BLOCK DIAGRAM
RESISTOR
CHAIN
GAIN
GND
GORB
DATA, DATAB
OR, ORB
2. FUNCTIONAL DESCRIPTION
The TS8387 is an 8 bit 500 MSPS ADC based on an advanced high speed bipolar technology (B6HF from SIEMENS)
featuring a cutoff frequency of 25 GHz.
The TS8387 includes a front–end master/slave Track and Hold stage (S/H), followed by an analog encoding stage and
interpolation circuitry.
Successive banks of latches are regenerating the analog residues into logical datas before entering an error correction
circuitry and a resynchronisation stage followed by 75 ohms differential output buffers.
The TS8387 works in fully differential mode from analog inputs up to digital outputs.
The TS8387 has been designed for featuring a full power input bandwidth of 1.8 GHz on chip and 1.2 GHz in CQFP68
package (in differential or single–ended input mode).
Control pin GORB is provided to select either Gray or Binary data output format.
The TS8387 uses only vertical isolated NPN transistors together with oxyde isolated polysilicon resistors, allowing
enhanced radiation tolerance (over 100kRad total dose expected tolerance).
3/38
TS8387
3. SPECIFICATIONS
3.1.
ABSOLUTE MAXIMUM RATINGS
(see note below)
Parameter
Positive Supply Voltage
Digital Negative Supply voltage
Negative supply voltage
Maximum difference
negative supplies
Analog input voltages
Maximum difference between V
IN
and V
INB
Digital input voltage
Digital output current
Clock input voltage
Maximum difference
V
CLK
and V
CLKB
between
between
Symbol
V
CC
DV
EE
V
EE
DV
EE
to V
EE
V
IN
or V
INB
V
IN –
V
INB
V
D
I
O
V
CLK
or V
CLKB
V
CLK –
V
CLKB
T
j
T
op
T
stg
T
leads
GORB
Conditions :
–3V<Vout < 0.5 V
Comments
Value
GND to 6
GND to –5.7
GND to –6
0.3
–1 to +1
–1 to +1
–0.3 to V
CC
+0.3
20
–3 to +1.5
–2 to +2
+145
–55 to +125
–65 to +150
+300
Unit
V
V
V
V
V
V
V
mA
V
V
°C
°C
°C
°C
Maximum junction temperature
Operating temperature (Tc)
Storage temperature
Lead temperature
(soldering 10 s)
Notes : Absolute maximum ratings are limiting values, to be applied individually, while other parameters are within specified operat-
ing conditions. Long exposure to maximum rating may affect device reliability.
The use of a thermal heat sink is mandatory (see Thermal characteristics page 15).
3.2.
RECOMMENDED CONDITIONS OF USE
Parameter
Symbol
V
CC
V
EE, DVEE
V
IN,
V
INB
V
IN
–V
INB
PCLK,
PCLKB
Comments
Min.
4.75
–5.25
Typ.
+5
–5.0
±125
500
4
Max.
5.25
–4.75
Unit
V
V
mV
mVpp
Positive supply voltage
Negative supplies volt-
ages
Differential analog input
voltage (Full Scale)
Clock input power level
Digital Outputs termina-
tion
Operating temperature
range
4/38
50 ohms differential or
single–ended
50
W
single-ended clock
input
10
dBm
ZOUT
75
W
or 50
W
differential output back termination, or unterminated out-
puts : see Advanced Application Notes figures 3,4,5
Civil : ”C” grade
Industrial : ”V” grade
Military : ”M” grade
0 < Tc < 70
–40 < Tc < 85
–55 < Tc ; Tj < +125
°C
T
J
TS8387
3.3.
ELECTRICAL OPERATING CHARACTERISTICS
VEE = DVEE = –5 V ; V
CC
= +5 V ; V
IN
–V
INB
= 500 mVpp Full Scale differential input ;
Digital outputs 75 or 50
W
differentially terminated ; Tj (typical) = 70°C. Full temperature range : –55 < Tc ; Tj < +125
Parameter
RESOLUTION
ANALOG INPUTS
Full Scale Input Voltage range (differential mode)
( 0 Volt common mode voltage )
V
IN
V
INB
Full
IV
Full
IV
–125
–125
–250
0
IV
IV
IV
IV
3
10
1
1.2
125
125
250
mV
mV
mV
mV
pF
m
A
MW
GHz
Symb
Temp
Test
level
Min
Typ
8
Max
Unit
bits
Full Scale Input Voltage range (single-ended input V
IN
option )
(see Application Notes)
V
INB
Analog input capacitance
Input bias current
Input Resistance
Full Power input Bandwidth
CLOCK INPUTS
Logic compatibility for clock inputs
(see Application Notes)
C
IN
I
IN
R
IN
FPBW
( note 7 )
ECL or specified clock
input power level in dBm
ECL Clock inputs voltages (V
CLK
or V
CLKB
) :
H
Logic ”0” voltage
H
Logic ”1” voltage
H
Logic ”0” current
H
Logic ”1” current
Clock input power level into 50 ohms termination
Clock input power level
Clock input capacitance
DIGITAL OUTPUTS
(notes
1,6)
Logic compatibility for digital outputs
(see Application Notes)
V
IL
V
IH
I
IL
I
IH
Full
Full
Full
Full
–1.1
5
5
–1.5
V
V
mA
mA
dBm into 50 ohms
4
C
CLK
3
10
dBm
pF
ECL or low voltage dif-
ferential output signals
Differential output voltage swings :
H
75
W
open transmission lines ( ECL levels )
H
75
W
differentially terminated
H
50
W
differentially terminated
1.620
0.825
0.660
V
V
V
5/38
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