IDT GRM155R61A104KA01D Intermediate frequency digital variable gain amplifier Datasheet

DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
GENERAL DESCRIPTION
FEATURES
The IDTF1200 is a Digitally Controlled Intermediate
Frequency Differential Variable Gain Amplifier for
BaseStation and other commercial applications with a
low IF frequency. The device offers extremely low
Noise Figure over the entire gain control range. The
device is packaged in compact 5x5 Thin QFNs with 200
ohm differential input and output impedances for ease
of integration into the receiver lineup. Versions
covering IF frequencies up to 300 MHz with low
distortion are available.
Ideal for high SNR systems
22 dB typ Maximum Gain
23 dB gain control range
7 bit parallel control
0.25 dB Gain Steps
Excellent Noise Figure < 3.0 dB
5mm x 5mm 28 pin package
200 Ω Differential Input
200 Ω Differential Output
NF degrades < 2dB @ 12dB reduced gain
50 MHz – 160 MHz frequency range
Ultra-Linear: IP3O +48 dBm typical
External current setting resistor
Fast Gain Step Settling < 20 nsec














COMPETITIVE ADVANTAGE
The F1200 acts to enhance system SNR when VGA gain
is reduced. The F1200 noise figure (NF) degrades only
slightly (NF slope ~ -0.16 dB/dB) over a 13 dB control
range while holding the Output IP3 approximately
constant. The resultant improvement in noise can
enhance the system SNR up to 2 decibels at low gain
settings relative to a standard VGA.
DEVICE BLOCK DIAGRAM
The device has excellent DNL and INL simplifying digital
compensation. The device also offers the extremely low
Harmonic, IM2, and IM3 distortion necessary to drive an
ADC directly in an IF sub-sampling application.
`
ATTN
Out
AMP
In
AMP
out
ATTN
In
7
Gain
Control
Bias
Control
Decode
Logic
VCC VMODE
PART# MATRIX
`
IF freq
range
NF
F1200
22 to -1
48
50 - 160
2.6
F1206*
20 to -11
47
150 - 250
3.6
F1207*
20 to -11
46
230 - 300
3.7
ORDERING INFORMATION
STBY
rie
IP3O
ISET
Omit IDT
prefix
0.75 mm height Tape &
Reel
package
op
Gain
Range
IDTF1200NBGI8
Pr
Part#
VCC
y
BaseStation Diversity Receivers
Digital Pre-Distortion
Wave Point-to-Point Radios
Public Safety Receivers
tar
APPLICATIONS




IDTF1200
RF product Line
Industrial
Temp range
RevO
ID
T
*Future Product
Green
Page 1 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
ABSOLUTE MAXIMUM RATINGS
VCC to GND
All other Pins to GND
ISET to GND
RF Input Power (ATTN_IN+, ATTN_IN-) @GMAX
Continuous Power Dissipation
θJA (Junction – Ambient)
θJC (Junction – Case) The Case is defined as the exposed paddle
Operating Temperature Range (Case Temperature)
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10s) .
-0.3V to +5.5V
-0.3V to (VCC +0.25V)
-0.3V to +2.2V
+10 dBm
1.5W
+41°C/W
+4°C/W
TC = -40°C to +85°C
150°C
-65°C to +150°C
+260°C
KEY FEATURE – NOISE FIGURE SLOPE
Standard Variable Gain amplifiers exhibit a [NF/Gain] slope of -1 dB/dB. Practically speaking, as gain is
reduced, Noise Figure degrades dB for dB. The F1200 utilizes new technology that flattens the Noise Figure
response (~ -0.16 dB/dB) for most of the gain control range while keeping distortion (Output IP3) constant.
The result is that NF is improved up to 16 dB vs. a standard VGA at low gain settings. The graph below
illustrates this by showing the IDTF1200 NF and IP3O vs. Gain setting contours.
50
Output IP3
40
35
30
y
25
tar
20
10
Noise Figure
5
0
0
2
4
6
8
10
12
16
18
20
22
RevO
ID
T
Gain (dB)
14
Pr
-2
rie
15
op
NF (dB) and Output IP3 (dBm)
45
Page 2 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
IDTF1200 SPECIFICATION
VCC = +5.0V, fRF = 100MHz, TC= +25°C, STBY = GND, R6 = 2.87K +/-1%, POUT = +3 dBm, unless otherwise noted in the condition column.
EVkit trace, transformer & matching losses are de-embedded for specification purposes (note: de-embedded losses = 0.4dB input and
0.4dB output at 100MHz).
Parameter
Condition
Operating Temp.
Range
Symbol
Case Temperature Measured
at the exposed paddle
typ
TC
Logic Input High
VIH
Logic Input Low
VIL
Logic Current
min
max
-40 to +85
C
1
2.0
IIH, IIL
units
V
-1
0.8
V
+1
μA
Operating voltage
range
Analog & Digital Supplies
VCC
Supply Current
Total, All VCC; R6= 2.87K +/-1%
ISUPP
Standby Current
Total, All VCC
 All digital inputs at 2.0VDC
 VCC=5.25VDC
ISTBY
Frequency Range
Output IP3 > +40 dBm
fRF
50 to 160
MHz
Input Resistance
Differential
RIN
200
Ω
Output Resistance
Differential
ROUT
200
Ω
Maximum Gain
GC = [0000000]
GMAX
20.7
21.7
22.6
dB
Minimum Gain
GC = [1011101]
GMIN
-2.8
-1.7
-0.7
dB
Gain Step
4.75 to 5.25
103
110
LSB
V
117
mA
2.5
mA
0.25
dB
ΔΦ due to change in gain
ΦSLOPE
0.3
deg/dB
Differential Gain Error
Between adjacent 1dB steps
DNL
.05
dB
Integral Gain Error
Error vs. straight line
INL
+/-0.20
dB
Noise Figure
At Maximum Gain
NF
2.6
dB
Noise Figure
GC = [0110100] (gain = 9dB)
NFBACK
4.55
dB
Output IP3



Set code = 0000000, (GMAX)
Pout = +3 dBm per tone
800 KHz Tone Separation
IP3O1
48
dBm





Set code = 0110100,, (Gain = 9dB)
Pout = +3 dBm per tone
800 KHz Tone Separation
IP3O2
44
T1dB
15

Gain Step from 22 to 21 dB setting
Settles to within 0.1 dB of final
value
FRF = 100 MHz
2 Harmonic


Set code = 0000000, (GMAX)
Pout = +3 dBm
# Control Bits
Parallel
1 dB Compression


Set code = 0000000, (GMAX)
Single Tone Test
H2
CB
P1dBO
ID
RevO
+16.7
tar
dBm
nsec
-82
dBc
7
#
+19.4
dBm
T
1 –Items in bold italics are Guaranteed by Test
2 – See Graph on Page 8
rie
nd
2
op
Settling Time
Pr
Output IP3 –
at Gback
y
Phase Slope
Page 3 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
TYPICAL OPERATING PARAMETRIC CURVES (GMAX, 5.00V, 25C, POUT +3 dBm, 100MHz unless otherwise noted)
Gain vs. Voltage
25
25
20
20
15
15
Gain (dB)
Gain (dB)
Gain vs. Temperature
10
-40C
5
25C
10
85C
4.75V
5
0
50
100
150
200
250
300
0
50
100
Frequency (MHz)
200
250
300
250
300
S22 vs. Temperature
0
-10
-10
Output Gamma [s22] (dB)
0
-20
-30
-40
150
Frequency (MHz)
S11 vs. Temperature
-40C
25C
-20
-30
-40
85C
-50
-40C
25C
85C
-50
0
50
100
150
200
250
300
0
50
100
Frequency (MHz)
150
y
Gain and NF vs. Frequency (measured w/NF meter)
24
tar
0
22
20
-10
-30
rie
-20
16
14
Gain
12
10
8
25C
85C
4
2
0
-50
0
50
100
150
200
250
30
300
50
70
90
110
130
150
170
Frequency (MHz)
ID
T
Frequency (MHz)
RevO
Pr
6
-40C
Noise Figure
op
Gain and NF (dB)
18
-40
200
Frequency (MHz)
S12 vs. Temperature
Reverse Isolation [s12] (dB)
5.25V
0
0
Input Gamma [s11] (dB)
5.00V
Page 4 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
TOCS CONTINUED
S22 vs. Gain Setting
0
0
-5
-5
-10
-10
-15
-15
Output Gamma (dB)
Input Gamma (dB)
S11 vs. Gain Setting
-20
-25
-30
50 MHz
-35
100 MHz
-40
150 MHz
-20
-25
-30
-35
50 MHz
-40
100 MHz
150 MHz
-45
-45
-50
-50
-1
3
7
11
15
19
-1
23
3
7
15
22
40
20
35
23
Normalized S21 Phase response (degrees)
50 MHz
18
16
14
12
10
8
6
50 MHz
4
100 MHz
2
150 MHz
0
100 MHz
30
150 MHz
25
20
15
10
5
0
-5
-10
-2
-1
3
7
11
15
19
-1
23
3
7
11
15
NF correction
Correct EVkit measured Output
IP3 by this amount to account for
trace & transformer losses
y
1.8
IP3 correction
1.6
Correct EVkit measured Gain
by this amount to account for
trace & transformer losses
0.0
-0.4
1.2
1.0
0.8
op
EVkit Loss (dB)
0.4
rie
1.4
0.8
0.6
Correct EVkit measured Noise
Figure by this amount to account
for trace & transformer losses
0.2
0.0
-1.6
0
0
50
100
150
200
250
300
50
100
150
200
250
300
Frequency (MHz)
ID
T
Frequency (MHz)
RevO
Pr
0.4
-0.8
tar
2.0
1.6
-1.2
23
EVKit Gain Correction
EVKit NF & Output IP3 Correction
1.2
19
Gain Setting (dB)
Gain Setting (dB)
Correction (dB)
19
S21 Phase vs. Gain Setting
S21 vs. Gain Setting
Gain (dB)
11
Gain Setting (dB)
Gain Setting (dB)
Page 5 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
TOCS CONTINUED
DNL vs. Voltage (100 MHz, 1dB Steps)
0.20
0.20
0.15
0.15
0.10
Differential Non-Linearity (dB)
Differential Non-Linearity (dB) .
DNL vs. Frequency (1dB Steps)
100 MHz
80 MHz
120 MHz
0.05
0.00
-0.05
50 MHz
30 MHz
-0.10
0.10
5.25V
0.05
0.00
-0.05
-0.15
-0.15
-0.20
-0.20
-1
1
3
5
7
9
11
13
15
17
19
-1
21
1
3
5
7
0.20
0.15
0.15
Differential Non-Linearity (dB)
Differential Non-Linearity (dB)
0.20
-40C
0.05
0.00
-0.05
25C
85C
11
13
15
17
19
21
DNL vs. Temperature (100 MHz, 0.5dB Steps)
DNL vs. Temperature (100 MHz, 1dB Steps)
0.10
9
Gain Setting (dB)
Gain Setting (dB)
-0.10
-40C
0.10
0.05
0.00
-0.05
25C
85C
-0.10
-0.15
-0.15
-0.20
-0.20
-1
1
3
5
7
9
11
13
15
17
19
-1
21
1
3
5
7
9
11
13
120 MHz
0.00
-0.05
85C
0.10
0.00
100 MHz
-0.10
-0.20
-0.30
-0.15
-0.40
-0.20
3
5
7
9
11
13
15
17
19
50 MHz
-1
21
rie
0.05
0.20
op
0.10
Pr
Cumulative Gain Error (dB)
-40C
1
21
y
0.30
0.15
-1
19
tar
0.40
0.20
25C
17
INL vs. Frequency
DNL vs. Temperature (100 MHz, 0.25dB Steps)
-0.10
15
Gain Setting (dB)
Gain Setting (dB)
Differential Non-Linearity (dB)
5.00V
4.75V
-0.10
1
3
5
7
9
11
13
15
17
19
21
Gain Setting (dB)
RevO
ID
T
Gain Setting (dB)
Page 6 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
TOCS CONTINUED
INL vs. Voltage (100 MHz)
INL vs. Temperature (100 MHz)
0.40
0.40
-40C
0.20
0.10
0.00
-0.10
-0.20
5.00V
0.30
25C
Cumulative Gain Error (dB)
Cumulative Gain Error (dB)
0.30
5.25V
0.20
0.10
0.00
4.75V
-0.10
-0.20
85C
-0.30
-0.30
-0.40
-0.40
-1
1
3
5
7
9
11
13
15
17
19
-1
21
1
3
5
7
9
20
18
18
16
16
14
14
Noise Figure (dB)
Noise Figure (dB)
20
100 MHz
10
150 MHz
8
15
17
19
21
12
5.00V
10
4.75V
8
6
6
4
4
5.25V
50 MHz
2
2
0
0
-1
1
3
5
7
9
11
13
15
17
19
-1
21
1
3
5
7
9
11
13
23
16
22
85C
8
6
4
20
19
18
7
9
11
13
15
17
19
Pr
15
0
5
4.75V
17
16
-40C
2
3
rie
25C
14
80 MHz
21
Gain Setting (dB)
5.00V
5.25V
21
op
Output P1dB (dBm)
14
1
21
tar
24
18
-1
19
y
20
10
17
Output P1dB vs. Voltage
Noise Figure vs. Temperature (100 MHz)
12
15
Gain Setting (dB)
Gain Setting (dB)
Noise Figure (dB)
13
Noise Figure vs. Voltage (100 MHz)
Noise Figure vs. Frequency
12
11
Gain Setting (dB)
Gain Setting (dB)
100 MHz
120 MHz
RevO
ID
T
Frequency (MHz)
Page 7 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
TOCS CONTINUED
Output IP3 vs. Voltage (100 MHz)
Output IP3 vs. Frequency
60
60
55
55
50
50
Output IP3 (dBm)
Output IP3 (dBm)
4.75V
45
40
IP3-
35
IP3+
5.00V
40
5.25V
35
30
25
4.0E+07
45
30
6.0E+07
8.0E+07
1.0E+08
1.2E+08
1.4E+08
25
-1.25
1.6E+08
10
Frequency (Hz)
22
Gain Setting (dB)
2nd Harmonic vs. Temperature (100 MHz)
Output IP3 vs. Temperature (100 MHz)
-50
60
2nd Harmonic w/+3 Pout (dBc)
55
-40C
25C
Output IP3 (dBm)
50
45
40
85C
35
-60
-70
25C
-80
85C
-90
30
-40C
25
-1.25
10
-100
-1.25
22
10
22
Gain Setting (dB)
Gain Setting (dB)
Settling Time (1 dB Step, 100 MHz)
RevO
ID
T
Pr
op
rie
tar
y
Settling Time (16dB Step, 100 MHz)
Page 8 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
PIN DIAGRAM
TOP View
(looking through the top of the package)
ATTN_OUT-
AMP_IN-
E_AMP
AMP_IN+
Bias_Amp
VCC Amp_Bias
27
26
25
24
23
22
m
m
ATTN_OUT+
Exposed Pad
0.
35
1
21
ISET
20
STBY
19
AMP_OUT -
18
AMP_OUT +
C
O
GND
28
VCC ATTN
2
ATTN_IN +
3
ATTN_IN -
4
GND
Package Drawing
5 mm x 5 mm package dimension
3.25 mm x 3.25 mm exposed pad
0.5 mm pitch
28 pins
0.75 mm height
5
17
VMODE
0.25 mm pad width
12
13
14
GC2
GC1
GC0
VCC DIG
y
11
15
tar
10
DIG_GND
rie
9
16
RevO
ID
T
Pr
op
8
GC3
7
GC4
GND
0.40 mm pad length
GC5
6
GC6
GND
Page 9 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
RevO
ID
T
Pr
op
rie
tar
y
PACKAGE DRAWING
Page 10 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
PIN DESCRIPTIONS
Pin #
Pin Name
GND
VCC_ATTN
ATTN_IN+
ATTN_INGround
Ground
Ground
GC6
GC5
GC4
GC3
GC2
GC1
GC0
VCC_DIG
DIG_GND
VMODE
18
19
20
21
AMP_OUT+
AMP_OUTSTBY
ISET
22
23
24
25
26
27
28
VCC_Amp_Bias
Bias_Amp
AMP_IN+
E_Amp
AMP_INATTN_OUTATTN_OUT+
Exposed Paddle
Function
Attenuator Power Supply
Attenuator_0 Differential Input P
Attenuator_0 Differential Input M
Untested - SPI Chip Select Input
Untested - SPI Data Input
Untested - SPI Clock Input
Parallel Gain Control Input – MSB (16 dB step)
Parallel Gain Control Input
Parallel Gain Control Input
Parallel Gain Control Input
Parallel Gain Control Input
Parallel Gain Control Input
Parallel Gain Control Input – LSB (0.25 dB step)
Digital Circuit Power Supply
Connect directly to Ground
Untested – SPI Enable
Connect to PCB GND for normal parallel operation
Amplifier Differential Output P
Amplifier Differential Output M
Amplifier Power Down. Ground for Normal operation
Current Setting Resistor. Connect recommended
value (2.87K) to ground. Use 1% tolerance
Amplifier and Bias Circuit Power Supply
Amplifier Bias External Pin for Decoupling Capacitor
Amplifier Differential Input P
Amplifier Common Emitter
Amplifier Differential Input M
Attenuator_0 Differential Output M
Attenuator_0 Differential Output P
RevO
ID
T
Pr
op
rie
tar
y
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Page 11 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
EVKIT / APPLICATIONS CIRCUIT SCHEMATIC
The diagram below describes the recommended applications / EVkit circuit:
Vcc
C4
C1
C9
C2
Vcc
C8
24
23
VCC Amp_Bias
25
Bias_Amp
26
AMP_IN+
27
E_AMP
28
AMP_IN-
C10
ATTN_OUT-
ATTN_OUT+
Vcc
JP1
R4
22
C11
GND
VCC ATTN
1
21
Bias
Control
2
20
ISET
R6
STBY
L1
ATTN_IN +
ATTN_IN -
C24
T1
GND [CS]
GND [DATA]
GND [CLK]
3
19
4
18
5
17
6
Decode
Logic
SPI
(Untested)
16
15
7
T2
AMP_OUT C13
Vcc
AMP_OUT +
VMODE
C23
C17
L2
DIG_GND
Coilcraft
1008CS
C20
VCC DIG
R13
R14
GC6
R15
GC5
JP3
C19
R16
8
GC4
9
10
11
12
13
14
GC2
GC1
Vcc
GC0
GC1
GC2
GC3
GC4
R20
GC5
R19
Vcc
GC0
C21
13
11
9
7
5
3
1
14
12
10
8
6
4
2
Vcc
y
GC3
R18
GC6
R11
R17
C22
tar
JP5
RevO
ID
T
Pr
op
rie
Vcc
Page 12 of 13
April, 2011
DATASHEET
Intermediate Frequency Digital Variable Gain Amplifier
IDTF1200
EVKIT & BOM (Email: [email protected] to request Controller SW and Cable)
The picture and table below describes the recommended EVkit operation and BOM
* Serial Mode Untested,
Not Guaranteed to Work
Power Up:
DC Power
•Closed = On
ISET
5x5 QFN
Device
•Open = Off
EVB Serial #
Pullup
Inductors
Output 4:1 Balun
Transformer
Input 4:1 Balun
Transformer
AMP_OUT
50 Ω
ATTN_IN
50 Ω
SPI*
VMODE
•Closed = Parallel Control
•Open = Serial Control*
VCC
Item # Value
GC [0[0-6]
REF / MONITOR
Size
Desc
Mfr. Part #
Mfr.
Ref Des
4:1 Balun
SM-22
4:1 Center Tap Balun
TC4-1TG2+
Mini Circuits
T1,T2
2
2.87k
0402
RES 2.87K OHM 1/10W 1% 0402 SMD
ERJ-2RKF2871X
Panasonic
R6
3
47k
0402
Pullup resistors for STBY and VMODE jumpers
RC0402FR-0747KL
Yageo
R4, R13
4
0
0402
RES 0.0 OHM 1/10W 0402 SMD
ERJ-2GE0R00X
Panasonic
5
680 nH
1008
RF inductor, ceramic core, 5% tol, SMT, RoHS
1008CS-681XJLC
Coilcraft
6
10 nF
0402
CAP CER 10000PF 16V 10% X7R 0402
GRM155R71C103KA01D
MURATA
7
1000 pF
0402
CAP CER 1000PF 50V C0G 0402
GRM1555C1H102JA01D
MURATA
C4,C10,C13,C19
8
0.1uF
0402
CAP CER .1UF 10V 10% X5R 0402
GRM155R61A104KA01D
MURATA
C9,C11,C17,C20
9
SMA
.062
SMA_END_LAUNCH
142-0711-821
Emerson Johnson
J1,J2,J3
10
Header_2Pin
TH_2
CONN HEADER VERT SGL 2POS GOLD
961102-6404-AR
3M
JP1,JP3
11
Header_14Pin TH_7x2
CONN HEADER 14 POS STRGHT GOLD
N2514-6002-RB
3M
JP5
12
F1200ZD
IF VGA
Q01B005M
IDT
U1
13
PCB
14
DNP
tar
R11
L1,L2
Pr
op
rie
C1,C2,C8,C23,C24
0402
Resistors to ground on Gain ctrl lines
T
F1200 EV Kit Rev 1
ID
RevO
QFN-28
y
1
Page 13 of 13
R14 thru R20
April, 2011
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