SA604A
High-performance low-power FM IF system
Rev. 4.3 — 13 July 2016
Product data sheet
1. General description
The SA604A is an improved monolithic low-power FM IF system incorporating two limiting
intermediate frequency amplifiers, quadrature detector, muting, logarithmic received
signal strength indicator, and voltage regulator. The SA604A features higher IF bandwidth
(25 MHz) and temperature compensated RSSI and limiters providing wide RSSI dynamic
range, high IF/limiter gain and overall stability. The SA604A is available in an SO16
(surface-mounted miniature) and HXQFN16 package.
2. Features and benefits
Low power consumption: 3.3 mA typical
Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with
a dynamic range in excess of 90 dB
Two audio outputs — muted and un-muted
Low external component count; suitable for crystal/ceramic filters
Excellent sensitivity: 1.5
V
across input pins (0.22
V
into 50
matching network) for
12 dB SINAD (Signal-to-Noise and Distortion ratio) at 455 kHz
SA604A meets cellular radio specifications
3. Applications
Cellular radio FM IF
High-performance communications receivers
Intermediate frequency amplification and detection up to 25 MHz
RF level meter
Spectrum analyzer
Instrumentation
FSK and ASK data receivers
NXP Semiconductors
SA604A
High-performance low-power FM IF system
4. Ordering information
Table 1.
Ordering information
Topside
marking
SA604AD
SA604AD
04A
Package
Name
SO16
SO16
HXQFN16
Description
plastic small outline package; 16 leads; body width 3.9 mm
plastic small outline package; 16 leads; body width 3.9 mm
plastic thermal enhanced extremely thin quad flat package;
no leads; 16 terminals; body 3
3
0.5 mm
Version
SOT109-1
SOT109-1
SOT1039-2
Type number
SA604AD/01
SA604AD/02
SA604AHR
4.1 Ordering options
Table 2.
Ordering options
Orderable
part number
SA604AD/01,112
SA604AD/01,118
SA604AD/02
SA604AHR
SA604AD/02J
SA604AHRZ
Package
Packing method
Minimum
order
quantity
1000
2500
2500
1500
Temperature
Type number
SA604AD/01
SO16
SO16
SO16
HXQFN16
Standard marking
* IC’s tube - DSC bulk pack
Reel 13” Q1/T1
*Standard mark SMD
Reel 13” Q1/T1
*Standard mark SMD
Reel 7” Q2/T3
*Standard mark SMD
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
T
amb
=
40 C
to +85
C
SA604A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 4.3 — 13 July 2016
2 of 31
NXP Semiconductors
SA604A
High-performance low-power FM IF system
5. Block diagram
LIMITER_DECOUPL
LIMITER_DECOUPL
IF_AMP_DECOUPL
16(13)
15(12)
14(11)
GND
13(10)
12(9)
11(8)
10(7)
IF amp
limiter
SIGNAL
STRENGTH
INDICATOR
VOLTAGE
REGULATOR
1(14)
IF_AMP_DECOUPL
2(15)
GND
3(16)
MUTE_INPUT
4(1)
V
CC
5(2)
RSSI_OUTPUT
mute
quadrature
detector
6(3)
MUTE_AUD_OUTP
7(4)
UNMUTE_AUD_OUTP
aaa-012738
Pin numbers for SO16; HXQFN16 pins shown in parentheses
Fig 1.
Block diagram of SA604A
SA604A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 4.3 — 13 July 2016
QUADRATURE_INPUT
LIMITER_OUTPUT
9(6)
8(5)
IF_AMP_OUTPUT
LIMITER_INPUT
IF_AMP_INPUT
3 of 31
NXP Semiconductors
SA604A
High-performance low-power FM IF system
6. Pinning information
6.1 Pinning
IF_AMP_DECOUPL
GND
MUTE_INPUT
V
CC
RSSI_OUTPUT
MUTE_AUD_OUTP
UNMUTE_AUD_OUTP
QUADRATURE_INPUT
1
2
3
4
16 IF_AMP_INPUT
15 IF_AMP_DECOUPL
14 IF_AMP_OUTPUT
13 GND
SA604AD/0x
5
6
7
8
aaa-012737
12 LIMITER_INPUT
11 LIMITER_DECOUPL
10 LIMITER_DECOUPL
9
LIMITER_OUTPUT
Fig 2.
Pin configuration for SO16
14 IF_AMP_DECOUPL
terminal 1
index area
V
CC
RSSI_OUTP
MUTE_AUD_OUTP
UNMUTE_AUD_OUTP
1
2
13 IF_AMP_INPUT
12 IF_AMP_DECOUPL
11 IF_AMP_OUTPUT
10 GND
9
16 MUTE_INPUT
3
4
5
SA604AHR
(1)
15 GND
LIMITER_INPUT
6
7
LIMITER_DECOUPL
QUADRATURE_INPUT
LIMITER_OUTPUT
LIMITER_DECOUPL
8
aaa-016798
Transparent top view
(1) Die Attach Paddle (DAP).
Fig 3.
Pin configuration for HXQFN16
SA604A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 4.3 — 13 July 2016
4 of 31
NXP Semiconductors
SA604A
High-performance low-power FM IF system
6.2 Pin description
Table 3.
Symbol
IF_AMP_DECOUPL
GND
MUTE_INPUT
V
CC
RSSI_OUTPUT
MUTE_AUD_OUTP
UNMUTE_AUD_OUTP
QUADRATURE_INPUT
LIMITER_OUTPUT
LIMITER_DECOUPL
LIMITER_DECOUPL
LIMITER_INPUT
GND
IF_AMP_OUTPUT
IF_AMP_DECOUPL
IF_AMP_INPUT
-
[1]
Pin description
Pin
SO16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
-
HXQFN16
14
15
16
1
2
3
4
5
6
7
8
9
10
[1]
11
12
13
DAP
IF amplifier decoupling
ground
mute input
supply voltage
RSSI output
mute audio output
unmute audio output
quadrature input
limiter output
limiter decoupling
limiter decoupling
limiter input
ground
IF amplifier output
IF amplifier decoupling
IF amplifier input
exposed Die Attach Paddle
Description
HXQFN16 package supply ground is connected to both GND pin and exposed center pad. GND pin must
be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board
level performance, the exposed pad must be soldered to the board using a corresponding thermal pad on
the board. For proper heat conduction through the board, thermal vias must be incorporated in the PCB in
the thermal pad region.
SA604A
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 4.3 — 13 July 2016
5 of 31
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